**The Development of Chamber Technology**

Chamber technology has undergone significant development over the years, with key innovations coming from Echo Industries and Dr. Baronneck's work on geometry. The company's founding members, Oliver Echo and Dr. Verinek, worked together to design and build the first chamber at Harvard University after World War II. This marked a crucial milestone in the evolution of chamber technology.

The development of chamber technology is closely tied to the understanding of frequency and its relationship with material properties. According to Dr. Baronneck's research, the depth of treatment directly correlates with the lower cutoff frequency. This means that longer wedges result in a lower correlation between color frequency and the material properties of the wedge. The size of the chamber also plays a significant role, with deeper chambers correlating to higher frequencies.

The Echo Industries team, led by Oliver Echo and Dr. Verinek, conducted extensive research on chamber design and testing. They used impedance tubes to test their designs, which involved placing the chamber at one end of the tube and monitoring sound waves with microphones at various points along the tube. By adjusting the microphone's position, they could evaluate different aspects of the wedge's performance.

**The Importance of Wedge Design**

Wedge design is a critical aspect of chamber technology, as it can significantly impact sound quality and frequency response. The three key factors to consider when designing a wedge are its thickness, material composition, and diameter. Additionally, the open perf size plays a crucial role in determining the chamber's performance. According to Dr. Baronneck's formula, using a 53-perf wedge can achieve near-100% transparency across frequencies up to 10,000 Hz.

The use of metal wedges has also been extensively studied, with researchers examining their effects on sound quality and frequency response. The team at Echo Industries discovered that metal wedges, particularly those made from high-quality materials, can produce exceptional sound quality. They found that these wedges could achieve near-100% transparency across frequencies, making them ideal for applications requiring precise sound reproduction.

**The Role of Chamber Design in Sound Quality**

Chamber design plays a vital role in determining the overall sound quality produced by a system. The size and shape of the chamber can affect sound waves' behavior, leading to variations in frequency response and timbre. By carefully designing and optimizing the chamber's dimensions, engineers can minimize these effects and create systems that produce high-quality sound.

The team at Echo Industries has developed an understanding of how chamber design interacts with frequency and material properties. They have used this knowledge to create wedges that optimize sound quality across a range of frequencies. Their research has led to the development of innovative solutions, such as 53-perf wedges, which achieve near-100% transparency.

**Collaboration and Innovation**

The collaboration between Oliver Echo and Dr. Verinek was instrumental in driving innovation in chamber technology. By working together, they were able to share knowledge, expertise, and resources, leading to breakthroughs in design and testing. Their partnership has left a lasting legacy, with the development of chamber technology continuing to evolve and improve.

**Real-World Applications**

Chamber technology has been used in various real-world applications, including home audio systems, professional recording studios, and even automotive sound systems. The Echo Industries team's work on chamber design has led to significant improvements in sound quality, making their technologies sought after by audiophiles and professionals alike.

By understanding the principles of chamber technology, engineers can create innovative solutions that enhance sound quality and improve overall listening experiences. The ongoing development of chamber technology continues to push the boundaries of what is possible, with new breakthroughs and innovations emerging regularly.

**The Importance of Testing and Validation**

Testing and validation are crucial components of chamber technology, ensuring that systems meet specific performance criteria and produce high-quality sound. The Echo Industries team has conducted extensive research on chamber design and testing, using techniques such as impedance tubes to evaluate their designs.

Their work on the 53-perf wedge demonstrates the importance of careful testing and validation in achieving optimal results. By carefully evaluating the effects of different variables on sound quality, engineers can refine their designs and create systems that meet specific performance requirements.

**Conclusion**

Chamber technology has come a long way since its inception, with significant innovations emerging over the years. The development of chamber technology is closely tied to our understanding of frequency and material properties. By carefully designing and optimizing chambers, engineers can create innovative solutions that enhance sound quality and improve overall listening experiences.

"WEBVTTKind: captionsLanguage: entoday we're taking a room from this demolished State this is new so to this Hemi anechoic chamber we're building one of the most advanced sound chambers of any independent reviewer that we're aware of meaning that we're not building it to then sell services to companies whose products we review because that's a conflict instead we're investing a quarter million dollars into this chamber to provide even better product analysis for our consumer reviews and we've already used it and have our first data the chamber is being built by this guy Dave Engel from Viking Enterprises and he knows a lot about sound Chambers and we utilize three Hertz springs on the proper spacing for the weight displacement would be 150 Hertz chamber if you generate like say there's 150 Hertz sound wave in this world it should only make one cycle and be captured on either end the depth of treatment directly correlates to the lower cutoff frequency Dave's us-based company is one of the leading experts in the world for anakoic Chambers in fact Dave built Logitech fully anechoic chamber that we looked at years ago and he's been involved in several high-profile chamber builds for silicon designers and Chip manufacturers that you all know now we'll have our own chamber to validate the claims of Manufacturers and we also recruited now retired veteran Mike Chen highly regarded founder of Silent PC review as a consultant to teach us about proper acoustic testing from one of the only Independent Media Outlets to ever do it right in our opinions this is our single biggest investment ever in the company and what we do and we've kept it a secret for half a year now in fact our fan testing couldn't advance until we introduced this chamber to have complete analysis exactly how we wanted of noise alongside performance and now that we have this piece we're moving together with both in unison our new ITX and updated ATX case reviews are the first to use the chamber and while that data is ready we at first need to lay the foundation the build with lessons from Dave this video is brought to you by us and store.gamersaccess.net which currently has a special 10 off promo code just type code chamber at checkout this is the only way we could ever hope to find the advanced level of testing that we're continually investing in products like our anti-static PC Building mod mats are soldering and project mats with high versatility for all manner of work and our Mouse mats with color rubber undersides and stitched borders are what allow us to spend 250 000 on this chamber other technical media Outlets have historically explored selling test services to the very companies whose products they review when adding higher end equipment but we're committing today to continue blocking paid work for any conflicting companies in order to maintain fall Independence that's why we need you to continue supporting us best of all we already have data on this chamber and videos coming up if you like what we're doing and you want to get a high-end product in return like one of our coaster packs that we've been showing or some of our cobalt blue pint glasses head over to store.camersaccess.net today and type in code chamber at checkout for sake of stamping it's June 9th I think we've got two weeks of construction and that starts in a few days this three-part build series will teach you what this chamber enables us to do like Ultra precise noise measurements and frequency spectrum plots and this first part will contain a unique combination of raw Technical and construction discussion with Dave so you all get to learn right alongside us we're doing this so we can eliminate variables from the surrounding environment and we've even had our chamber certified by a third party to ISO standards that we'll talk more about in the next part but for this video it all starts with measuring the room okay so we are with Dave now Dave's been standing all this up and building it Dave quick uh who are you what do you do oh hi David Ingall I'm the senior superintendent for Viking Enterprises Incorporated we specialize in building anechoic Chambers uh we do a majority of our work for Echo Industries and build their Chambers and uh this is what we we do we build large Chambers the specific type of chamber that Dave is building for us is called a Hemi and a coax chamber we chose this type for a number of reasons but one of them is for a more accurate representation of a real environment we'll let him explain more hey manicoric chamber is an antichoic chamber with a hard floor hard surface and the reason that we have the hard surface is you want some reflection in the chamber a full Anaconda chamber is 100 wedges that's the cable floors that you see or sometimes the grading floor but with this right here you're going to have a heavy and acrylic surface we'll have a couple different floor conditions to apply to this room and as we go earlier you were doing laser measurements correct for the floor but we shoot that with a laser and then we adjust every single one of the Springs right polymer shims so they're uh they hold under compression and weight loads and we lock them all in we get the floor exactly where you want it it's essential on a room with springs if you don't start off with a completely level floor you're in the pattern of the characteristics of you know saw toothing or panels not connecting correctly and then you have a sound Gap so it's essential that you start off correctly you know yeah this is also elevated correct so if you walk me through the Springs absolutely what we do is we have an isolated floor support system underneath here which we make out of a structural Channel and we utilize three Hertz springs on the proper spacing for the weight displacement and what that does is that allows us to start off with a decoupled chamber and also we can level everything off perfectly and get everything where we want it you have three Hertz Springs which means that everything thing that's cut off above three Hertz we we can control that we can cut off any kind of any continuation noise above three Hertz right the chamber itself is 150 Hertz chamber so your cutoff frequency will start at 150 and go up to 10 000 to 20 000 Hertz depending on how you how you run it basically putting it on the three Hertz Springs you isolate your slab in your room from anything else in this building now what we always do is anything that comes to this building has to be decoupled so when you bring your electronics and your electrical here toward the regular power we bring that through a electricians call it seal tight which is non-metallic so there's no way we can get any vibration or any kind of noise Transmission in the room itself and the reason we stay off all the other walls so we don't get close enough that we can get a flanking path or a vibration at higher frequencies from any other external walls and because conduit can resonate conduit can make sounds so we try to limit what we have in here and we always try to maintain this proper Fasteners proper locations of Fasteners and then keep that Integrity in mind as first thing as the floor is it's still just a floor and next we need to learn about how the walls are constructed to help with blocking the noise but also creating the environment we want to capture the noise so we start off trying to achieve a perfectly silent shell you know a very acoustic show and then from there we add the treatment inside to give you the antichloric property we call this Aero core insulation they think that this is a foam panel like you would have in a clean room but it's not the panel itself is a structural panel we use a 16 gauge skin on the outside and we have a 20 gauge skin on the inside we have what we call our magic of our composition of materials that is inside so basically with this kind of panel you get the Acoustics of close like a seven inch CMU concrete wall okay and what you notice you know with Acoustics you want Mass floor is at the same principle here well the floor is but we use a different type of system we use a heavier gauge top sheet okay and our components a little bit more rigid due to the fact that it is a floor and we use a 10 gauge top sheet which is heavier than most in the industry but as far as the performance with echo in our studies this works out really well the question I have for everyone is General understanding of metal is that tends to reflect things when you build a chamber like this why metal what do you end up doing as you complete the chamber to dead in any sort of when this room was complete if we didn't have any wedges on it this would be like what we call a Reverb it'll be super reflective it'll just be Pam you know put some music in here it'll just be really loud yeah you know but with our wedge system and our track system and we have you know a lot of calculations in that that once it's achieved is super quiet the main reason for metal is structural Integrity of the chamber and also with anything with Acoustics you want Mass you want to add to your mass and you want to add to your density so what we have inside the panel needs to be supported with a skeleton so to speak so we have our structural steel skeleton there's a lot of components that are going in there vertically and horizontally locking in every one of these panels so under case of a seismic activity or anything like that you have that but you need the mass for the Acoustics if you don't have the mass then you can't achieve what you want for a baseline because once you close the door if you get outside noise enter in the chamber through the walls it defeats what you're doing inside yeah so we use two types of wedges fiberglass wedges and metal wedges they both perform differently and the higher frequencies as far as the data that we've done from the perforated metal wedges so the application that you're using will work better for you the wedges themselves the things that absorb the noise and help us get the noise floor and characteristics we want there are a lot of reasons to build them in different ways and we'll talk about that more later in the video once they go in before we get there let's talk about how the air conditioning is handled this is critical because we need some airflow so it's not a tomb but also so we can run heat loaded tests and track the fan curve in real time while still maintaining a Target ambient temperature but AC is loud and we have to figure out a way to deal with that noise unfortunately someone else has done that for us and Dave can explain it I mean I know what this is but I'll let you explain it that's a screen window you know this is that's the balcony yeah that's the balcony so we can charge the tenants extra yeah that's where the way that's the wizard it's a very busy man he sticks his head out the window you're gonna have a horizontal silencer and it's going to be mounted externally on the wall and that's going to be lagged into your AC so your AC will come in through this this will be your supply and on this opposite wall over here we'll have you return so you'll have your airflow come through your room and keep your room at the uh the ambient temperature you desire why why flax why so much Flex we talk about that too avoiding hard angles stuff like that yeah you want to have your airflow controlled as far as you don't want any sharp angles or tight angles and so if you're bringing the airflow into the chamber when you have a height restriction like what you have here you can't go and utilize hard duct work with and if you did it would be line ductwork which you did here which is perfect but when you want to bring it into the chamber you want the the entry of the airflow to be long and you want it to be a nice gradual turn so the airflow kind of Cascades its way in any kind of sharp turns you're going to start making turbulence and the duct work which will start acting noise before you get to our attenuators I mean once you reach our attenuators or our silencers it really slows it down and defeats it but everything you've done here is just adding to the magic and making it work a heck of a lot more so what's your next step our next step is finishing we're going to set these panels here we got a beam coming in here this afternoon you got a door at some point that'll be over here I think yep you have two actually you have two doors here you have a door on the outside that opens out which is your acoustical door with with four magnetic seals on it then inside you'll have a cage door right and that'll because you want to have the stimulation inside the room of 100 in a co-work yeah and if you don't have wedges on the door then you have a spot that's not going to be in a car you know the guys are getting the ceiling panels prepped and ready and they're putting the air core insulation and to get back to that the reason we use this is we don't we don't like to have we use a double joint system we use an acoustical caulk that we calibrate the size of the bead and that goes into the Batten system which we actually which we call the uh these These are H battens and what we have is inside the corners of these H buttons we seal them with acoustical caulk then with the insulation inside that way the air space that's not contained in what's caulked there's no reverberate Noise Okay and even below this floor there's insulation even though the panels are insulated around the perimeter it's also insulated underneath the floor so say if there was some reverberant noise that was bouncing around it wouldn't create an echo chamber under the chamber right it gets captured in there as well that makes sense yeah so so you have every little facet has been looked into yeah so you haven't really excellent spot and a great Chamber coming up can't wait to give it to you yeah I'm looking forward to the next updates so thank you for walking me through it no problem we'll catch up soon all right take care okay so we have an update it's been only one day since the last clip we filmed yeah and already he's around in progress before I get the update from Dave let me just this is currently a Reverb chamber so there's like like a two or three second Reverb which is insane it just keeps bouncing around so uh Dave I don't know if we built the wrong chamber or well if you want to continue it yeah well it always starts off like a Reverb like we mentioned yesterday and uh from the next steps will be the wedges yeah so what did you end up working on the last day today what we did is we secured the beam last night before we left yeah and made everything structurally secure before the end of every day every work day today we installed all the ceiling panels and we've installed this whole front wall and sidewall locked everything in everything now is plum true it's Square it's ready to go we have the finishing touches to do we have the door frame to install then we're going to start the wedge track and then we'll start wedges so we took some shots of the clearance between the bar joists bar joists yeah before we were compressed you had two inches now yeah you right you got two and a half now you have exactly two inches okay so it's it's enough for Acoustics we're there so we're far away from it but she's really shoehorned in there you got the bang for the buck as far as fitting it in there right it's there's still stuff that's really close and it's it's tight up there we have one of our technicians up there and he can barely move he's we only have one guy that can kind of meander his way through it's extremely tight yeah so that's what you want you want it's the largest size and the same small space you know you want to get the absorption in there you know what um what's the next step at this point well the next step like I just briefly hit on is so we've got to go inside finish if you look it up up the top of the ceiling area you can see we still have fiberglass exposed yeah we have a skirt that goes around that it's a roof apron that cleans all that up and everything else we have the door frame that goes in we have an acoustical brace that goes inside and we have some you know acoustical caulking that has to go on top and some closure pieces and then we're basically at the point to start doing the layout for the wedge track and then we'll check in whatever the next major step is at this point so okay fantastic thanks for your time thank you thank you we left Dave and his team to make some more progress and then we checked back in the next day so we're at about 10 days since starting this build out these guys move fast the floor goes in now and then after that a very complicated assembly for the door of the chamber this chamber has an inner door and outer door we have the outer noise seal door with the magnetic seals ah and this is the inner door that goes and swings into the chamber okay which your wedges will actually mount on this face so when the door is closed you have the full anechoic properties this is a sound editing matting that we put in there it kills any reverberant noise off the metal skin okay so what we do is we'll have insulation there as well and then the wedge will come on top of that so you'll have no attenuation of the higher frequencies for the thin Metals you have the test properties correct you need to have the same wedge configuration on the inside so this way here when the door is closed and you're inside the chamber it's all wedges you don't see any doors you don't see anything else and the only way you'll know where the door is is you'll see the doors the wedges on this wall they run horizontally because when this door opens up it's got a socket they nest into each other exactly yeah it's pretty cool so heavy duty sound door you got STC 53 on the door and what we have is we have quad magnetic seals so you'll have a magnetic seal to adhere to this section here and where these bolts are we have another piece that bolts on here which catches another seal so when this door closes it's it's it's it's closed it's without the case or closed the store will stop any kind of sound from coming in the chamber do you have to do anything special on the threshold yeah we have a special seal on the bottom this bottom threshold is made out of three quarter inch solid steel so it's very straight and on the bottom of our door itself which is against the wall covered up right there we have a compression seal so it's a neoprene seal so it's basically like a balloon towards the bottom it will set the pressure on that so when the door closes you have friction but it doesn't enable you enough to close the door it'll allow you to close the door or the the neoprene will go up it'll make a beautiful soundproof seal at the bottom door the magnets will engage it'll suck the door closed and Bam you got it cool that's cool and we have our bearing assemblies inside of here brace washers thrust bearings and we put this assembly together it's a tubular frame and you can't have any deflection to it that's why we use a solid schedule 40 pipe in there so when this bottom plate captures the bottom of the door we use this bearing assembly yeah this thing's crazy looking yeah this is pretty intense and it goes against the wall and we have a mounting plate that we put into our our walls that actually will support this and then we have this bearing assembly right here that locks in and then we take the top of our door and we machine this so it receives this nicely like this and once we set this in place we have three Allen head set screws that will lock that in you're gonna probably have approximately in the weight capacity probably of 600 700 pounds that's the real reason and you'll open it with your finger how about uh inside now we can actually film in here the noise is pretty yeah it's starting to be real so you want to start with the ceiling the floor where do you want well yeah like you said you have a lot of updates since our last one well the ceiling's completed uh you can see the MC cable coming down from the ceiling this is all rough in we'll have that cut it'll go back in it'll tie into our light assembly and basically all these lights are connected through a little daisy chain together they have the layouts for your for your microphone so that's all these hangers that are up here and there we use the so cable due to the fact that it's solid rubber on the outside so it doesn't resonate like a conduit would resonate when we're all done we'll tie this into a bell box with a stainless steel cover plate we'll put acoustical felt on the back side of the box so you can slide it on this beautiful lvt floor yeah and we don't want to scratch yeah so the floor panels themselves have a 10 gauge top skin on there it was pretty thick 10 gauge is a little bit over an eighth of an inch so that's our top skin and that's a lap joint so it's a really tight acoustical seal for us and then once we do that what we do is we run perpendicular to that we run a it's called zip board it's a pre-engineered heavy duty tongue and groove Plywood And we run that perpendicular to the floor so our floor panels are we're running this way and when we're on this way with the zip board then on top of that then you have your lvt flooring which just has an underlayment in there as well which gives you another sound absorber as well the tongue and groove uh we talk about off camera but is also significant for assembly and can you walk through why you prefer that as opposed to square miles yeah yeah the tongue Groove you want a subfloor wood you want a high-end board that's why a kind of trademarked it when I call it the zip board but it's a pre-engineered tongue and groove it's made for flooring for uh for sheathing on walls it has a high strength to it it doesn't deteriorate it can get wet it won't mold it doesn't have a lot of other characteristics that plywood would have right and also being tongue and groove when you screw it down to the floor if you have square Edge plywood you have to put a lot of screws along the seams and then those seams can eventually pop which can create a flanking path or can create just a squeak yeah you don't want you don't want the two edges of the boards just to squeak to each other yeah tongue and groove there's no way it's a squeak-proof floor we got back to top talking about the silencer for a little bit because it's a very important part and a very specialized part of this build that a lot of sound Chambers don't accommodate for the most part we'll disable all the building AC when we run these tests however in scenarios where we need to run a heat load on the system we still need air supply to the roof and we'd also like Air Supply to the room when people are setting up for tests so it's not stuffy so here's some more from Dave about how that works and then also how the wedge track works we bump it so it's radiused because you want to do is you want to have the airflow you don't want your airflow to come against a flat surface because you get turbulence and turbulence is noise so we basically we bumped the end of it so it's radius and it's conical on the outside so so the airflow kind of Cascades around it it enters the silencer very easily the silencer is for it's like a large Muffler if you want to look at it in that perspective but on the inside like you notice that Bethel the baffling and the perforated metal the sun absorption material inside that so it's a huge silent cavity right so you've got another end of it and just yell at the top of your voice we wouldn't even hear you well you had your actually it's still up there one of your speakers yeah because this you're showing me the other day like pulling this out and not changing the volume putting it back and the the amount of like the DB drop yeah it is insane yeah well it deadens it as soon as it goes in and you can't even hear it in the row and now we have these Corners are all prepped I mean if you look at the way our assembly is as far as the spacing it's all because of our internal treatment now Conor and I built all those this morning so they're all pre-assembled to go with these Corners the floor is completed we're going to hang this caged or it's in the cage door then we can start with the interior treatments right now the rain look kind of a a rough scenario we have them just up there we're getting ready to do that door that we're talking about let's see if Connor's bringing in more wedges now so then we're getting ready to start the walls yeah so this elevation is critical for us we start right here we'll have our quarter fill a piece here and then we'll feed from back here look like like I mentioned we our wedges slide in yeah this area here allows us to slide in so we can build this wall then we build this treatment in this corner we'll build this wall we'll do the treatment in that corner we'll Build That Wall and then we kind of close off at the door over the next day or two the team finished the project and it looks amazing we still have plenty of exterior touches to do and we'll cover those in the next two parts of the series alongside the validation from a third party that the chamber works as it should the attention to detail here from Dave and team really shines through and a massive shout out again to John our general contractor for all the work that he put into the project including some of the finer touches you can see traces of all of the team's detail everywhere in these shots but it's best to hear about some of the finishes and the tacticals from once again Dave it's done and the surrounding room is getting close to done also this has been a hell of a project got a couple things loose like we need we're waiting on AC contractors to come in and finish some of this stuff ceiling tiles I'll talk about separately but these are an acoustic actually he recommended them acoustic ceiling tile yeah so Armstrong Tundra it's a very dense style it's excellent for Acoustics yeah and so we're trying to even kind of dead in the outside room too this is the pass-through this is probably worth talking about because anywhere there's a hole in the chamber is a place for sound to get in we have three pass-throughs here this way you can separate your low voltage from your high voltage and what it is um we make the composition of this to replicate the exact panel itself so it's the same thickness and the same noise deadening and STC quality is what the wall is there's a vestibule inside of there that's full of insulation and sheetrock and what we did is we manufactured this out of an ABS plastic so it has a high density to it and what you see on the outside you also have it on the inside so you have a complete dense cavity there so that counters your show like if you were going to run like your low voltage through here you have enough separation to run your high voltage in here and then say if you had a specialty test and there was a certain plug that you were trying to run you could actually fit the plug with its end on it and through the other one and this is something that uh Dave ended up fabricating in the basically the backyard on Sunday yeah we did that Sunday and it came out great thank you all handmaids oh thank you it took a little bit of a it was an Endeavor especially with the heat she came out nice though it came out beautiful yeah you made some comments about the heat that we won't repeat on Panera but they were very entertaining yeah but you have a champion everything's a chamfered edge and we have a gasket behind this and also a gasket on the interior so these are the switches one is for the interior Outlets correct and one's for the lights and that we should also bring up the uh the gap between the chamber and the ceiling is intentional too correct the chamber like we know is on three Hertz Springs so the chamber is actually live it moves so you want to make sure the chamber is always decoupled yeah and this is what you have right now the I I think our audio levels will probably do they sound different Vitali it's quieter yeah I mean it's better so our our I don't know how much it'll pick up on camera but the last chamber I filmed in was a fully anechoic one I remember it just it feels like it sucks the bass out of the voice sometimes because you lose all that Reverb correct so um yeah you'll notice a lot of people going like this yeah the only Echo I'm hearing is outside the chamber yes so absolutely um so I don't know let's start with the door this thing is a massive door there's two of them Cotter can you get the outside door please yeah so here we have uh Connor expert build technician who's acoustical technician common clutch uh says outside door I feel like I I'm like doing my normal projection and shouting but it feels so unnecessarily loud so when you close this door you have the seal to the chamber this is what's sealing off your chamber then we construct this door here which we call a wedge basket door you can close that one if you want yeah on this interior door is also uh it's pretty cool just because the way it sockets into the other wedges and then this is a magnetic seal on this one as well so when it closes it holds it shut and now you have the anechoic property because if you didn't have the wedges on the door it wouldn't have the same results for the test of the chamber other small features you have a foam door stop in here correct it's like small touch stuff just prevent paint from chipping if they hit each other they give you a soft stop for your door as well so when you open the door it'll that you don't engage the two wedges together it's like you said they won't get locked they won't scrape each other and it makes a nice Finishing Touch now you painted the uh the handle uh chassis I guess frame yeah and uh it actually looks really nice I like that thank you metal well it looked like it uh accentuated with the blue yeah and this is your custom blue color so this color really looks uh impressive it's beautiful in there the floor also we can see now it's been under either cardboard for about a week correct and uh this came out really nice too yeah that was that was your choice on that as well and it works out really nice because you have the underlayment and it pops in there instead of the regular vinyl VCT this is a this is the first this is a really uh it's a high-end floor but it's a beautiful floor how about the the ceiling we haven't talked about really at all other than the wedges so can you walk me through like why is that mesh rack there between the light and the wedge and uh and anything else that um okay well what we do is we with this chamber here like we're going back to the beginning you were a very tight height constraints so you couldn't bring in any of the electrical through the roof to where independent boxes were on the roof for a yule inspection so what we did is we had to bring the wiring inside the chamber so it's Daisy chained with together with the MC cable so those brackets there we'll put everything together in one unit with a UL listed box right that can be inspected by an electrician can be serviced by yourself if you have an issue with the box it's easily accessible as two screws on either side you drop this down and then you can remove it and do your work on it also the elevation like you noted is very important because you want the the bottom of the light to be above the peak of the wedge so this is set for an inch inside the wedge if it's any higher you get Shadows if it's any lower you get Reflections right so you really want to just make sure you got that the right desire hey John a shout out too he's our normal GC he did the whole building yeah the electrical here like we mentioned before we design it we like to use an so cable and the reason we do this is because we can also put acoustical felt on the box this way when the box is on the floor and it slides around right it doesn't have any noise and also it won't damage the blocks of the floor if somebody drops it or drags it or drags it or whatever is exposed yeah and instead of putting the plug on the wall where you're actually bringing a cord to here and you're actually always pulling on that pulling on that which eventually is going to loosen up yeah this right here brings your power source to you here so say you bring it to here and you set it down this is an so cable it's not it's a heavy cable so it stays to the floor it's not a trip Hazard right it brings your power to what you want we have two of them located in there so you have eight outlets in this chamber which is quite a few knowing that you can also bring in power there yeah then afterwards you just roll this back up and you're doing a test and you just basically tuck it away I want to make sure anyone in the audience I know a lot of Engineers from like AMD Intel and video watch our stuff especially this kind of stuff so I want to make sure everyone uh in any kind of decision making position from those companies understands that stuff like the felt on the boxes is a Dave and Viking attention to detail type thing where like people who watch our reviews I think are you all are very familiar with uh everything we talk about it's all attention to detail the biggest time we kind of have praise or criticism for like PC building companies it's bad or good attention to detail so uh it's those it's the small touches that either way the way I always look at it is if you got someone who's putting felt on a box so it doesn't scratch the floor then he's probably doing a pretty good job with all the big stuff that really matters not to mention touching Up A Screw head so you don't have everything's painted everything matches in the early days people you go you go that so far that you paint every screw head I'm like yeah but you know what like end users like yourself that are into that realm of you know Precision will look at that painted screw head and they look at it and say geez that's that's the quality thing right so they look at that as if they're painting screw heads and they're felt in boxes I feel comfortable that they did the right procedures on building my channel yeah you know so it is something that you know a few people recognize it but the ones that do it's important so thank you yeah yeah how about um for on a tactical side to like geometry of the wedges uh we were kind of getting into some of the wedge discussion previously you know something about I guess the original sort of wedge designs and some some of the decisions or history there Echo uses the stuff from Dr Leo baroneck he was an MIT professor and he actually built the first chamber in Harvard I think I think it was just after World War II but the wedge geometry is critical to how the wedge performs in the chamber I mean you have the slope of the wedge you have the the flat or the landing of the wedge and you have the depth of treatment of the wedge the depth of treatment directly correlates to the lower cutoff frequency so if the wedge is longer the correlation for the color frequency is going to go lower and lower and then the size of the chamber and all that works relative too that was one of the things we had looked at 100 Hertz Chambers as an option one of the uh I guess it makes sense now I was trying to remember why we didn't do it other than cost and um I think you start losing more usable space in the room correct and we physically can't fit a larger room so correct you need all that is the geometry you have to work it all together with your space because the lower the frequency the bigger the wedge you know and so the bigger the wedge the bigger the chamber right unless you have like you say you have no space yeah but what we use here is our Echoes is 50 perf used to be used a lot Echols found out that using 53 perf gives us like like almost 100 transparency even though you see a metal wedge the studies that we've done on this give us 100 transparency for absorption which is okay which is fantastic and with a metal wedge there's three factors that you look at you look at the thickness of the material what the wedges made of you look at the size of the diameter of the hole and you look at the open perf size and that kind of works in that correlation along with that same formula of Dr baroneck so like I mentioned this is 53 so you have like the note zero percent you know 100 transparency because I think they brought up to like around 10 000 Hertz there's like zero transparency you don't you don't catch the metal at all as a reflection it's all involved so it works really really well that's cool it's a fantastic wedge too the doctor Dr baronneck right he was he he he went to Cornell I believe and he went to Harvard as well he he worked on his geometry and Echo Industries back in the day there was Oliver Echo he was the founding member of of eckel and he worked directly with Dr verinek on design and Dr baronneck would kind of design the wedge and then Oliver Echo would build the wedge then they would test the wedge then they would build design it then they would build it and then it would test it they were tested like an impedance tube which is a long tube that they put the wedge at the other end and they put the microphone in there and then by changing the the location of the microphone they could do the different testing as far as on the wedge okay so it was uh a lot of research and development that was right after World War II and they built the first chamber if I'm correct I think it was at Harvard is where they built it cool you know so it's it's I think it still might be out there I'm not sure that's the Chamber walkthrough I'm excited to start using it I think Patrick's going to be in here pretty much immediately to start figuring out the test setup and uh Patrick was our uh our clutch door technician as well on the door so but yeah it was great I also want to add something to it to your your viewers that you know Steve's the real guy and he's just like you see him on TV and on the views he's a good guy and straightforward guy he's given us a lot of hospitality we really enjoyed this build and I was wondering I appreciate it thank you for everything absolutely and Connor has really enjoyed working with you and and also the knowledge on the the gaming because Connor's the big gamer yeah right yeah I know you guys did a great job and thank you everyone for watching this segment we'll have some more after this to talk about how the chamber works so Dave thank you thank you take care everybody of course this bill didn't go without its challenges but the team that we had on site here did excellently to tackle them as they came up we'll have part two where we do the validation of this chamber soon and we actually have already used this for the frackle Terra in our upcoming ITX reviews and the Rog Ally and as always go to store.gamersaccess.net to support us directly because it's gonna take a while to pay this off you can use code chamber for 10 off of anything on the store while the code is active and if you need any kind of Studio Listening Room Etsy room or Anna Cook chamber we can highly recommend Dave and Viking Enterprises as a personal sign off too I loved working with the team here and I've missed seeing them in the office bright and early every morning to work on it and we hope to see them again for future projects thanks for watching we'll see you all next timetoday we're taking a room from this demolished State this is new so to this Hemi anechoic chamber we're building one of the most advanced sound chambers of any independent reviewer that we're aware of meaning that we're not building it to then sell services to companies whose products we review because that's a conflict instead we're investing a quarter million dollars into this chamber to provide even better product analysis for our consumer reviews and we've already used it and have our first data the chamber is being built by this guy Dave Engel from Viking Enterprises and he knows a lot about sound Chambers and we utilize three Hertz springs on the proper spacing for the weight displacement would be 150 Hertz chamber if you generate like say there's 150 Hertz sound wave in this world it should only make one cycle and be captured on either end the depth of treatment directly correlates to the lower cutoff frequency Dave's us-based company is one of the leading experts in the world for anakoic Chambers in fact Dave built Logitech fully anechoic chamber that we looked at years ago and he's been involved in several high-profile chamber builds for silicon designers and Chip manufacturers that you all know now we'll have our own chamber to validate the claims of Manufacturers and we also recruited now retired veteran Mike Chen highly regarded founder of Silent PC review as a consultant to teach us about proper acoustic testing from one of the only Independent Media Outlets to ever do it right in our opinions this is our single biggest investment ever in the company and what we do and we've kept it a secret for half a year now in fact our fan testing couldn't advance until we introduced this chamber to have complete analysis exactly how we wanted of noise alongside performance and now that we have this piece we're moving together with both in unison our new ITX and updated ATX case reviews are the first to use the chamber and while that data is ready we at first need to lay the foundation the build with lessons from Dave this video is brought to you by us and store.gamersaccess.net which currently has a special 10 off promo code just type code chamber at checkout this is the only way we could ever hope to find the advanced level of testing that we're continually investing in products like our anti-static PC Building mod mats are soldering and project mats with high versatility for all manner of work and our Mouse mats with color rubber undersides and stitched borders are what allow us to spend 250 000 on this chamber other technical media Outlets have historically explored selling test services to the very companies whose products they review when adding higher end equipment but we're committing today to continue blocking paid work for any conflicting companies in order to maintain fall Independence that's why we need you to continue supporting us best of all we already have data on this chamber and videos coming up if you like what we're doing and you want to get a high-end product in return like one of our coaster packs that we've been showing or some of our cobalt blue pint glasses head over to store.camersaccess.net today and type in code chamber at checkout for sake of stamping it's June 9th I think we've got two weeks of construction and that starts in a few days this three-part build series will teach you what this chamber enables us to do like Ultra precise noise measurements and frequency spectrum plots and this first part will contain a unique combination of raw Technical and construction discussion with Dave so you all get to learn right alongside us we're doing this so we can eliminate variables from the surrounding environment and we've even had our chamber certified by a third party to ISO standards that we'll talk more about in the next part but for this video it all starts with measuring the room okay so we are with Dave now Dave's been standing all this up and building it Dave quick uh who are you what do you do oh hi David Ingall I'm the senior superintendent for Viking Enterprises Incorporated we specialize in building anechoic Chambers uh we do a majority of our work for Echo Industries and build their Chambers and uh this is what we we do we build large Chambers the specific type of chamber that Dave is building for us is called a Hemi and a coax chamber we chose this type for a number of reasons but one of them is for a more accurate representation of a real environment we'll let him explain more hey manicoric chamber is an antichoic chamber with a hard floor hard surface and the reason that we have the hard surface is you want some reflection in the chamber a full Anaconda chamber is 100 wedges that's the cable floors that you see or sometimes the grading floor but with this right here you're going to have a heavy and acrylic surface we'll have a couple different floor conditions to apply to this room and as we go earlier you were doing laser measurements correct for the floor but we shoot that with a laser and then we adjust every single one of the Springs right polymer shims so they're uh they hold under compression and weight loads and we lock them all in we get the floor exactly where you want it it's essential on a room with springs if you don't start off with a completely level floor you're in the pattern of the characteristics of you know saw toothing or panels not connecting correctly and then you have a sound Gap so it's essential that you start off correctly you know yeah this is also elevated correct so if you walk me through the Springs absolutely what we do is we have an isolated floor support system underneath here which we make out of a structural Channel and we utilize three Hertz springs on the proper spacing for the weight displacement and what that does is that allows us to start off with a decoupled chamber and also we can level everything off perfectly and get everything where we want it you have three Hertz Springs which means that everything thing that's cut off above three Hertz we we can control that we can cut off any kind of any continuation noise above three Hertz right the chamber itself is 150 Hertz chamber so your cutoff frequency will start at 150 and go up to 10 000 to 20 000 Hertz depending on how you how you run it basically putting it on the three Hertz Springs you isolate your slab in your room from anything else in this building now what we always do is anything that comes to this building has to be decoupled so when you bring your electronics and your electrical here toward the regular power we bring that through a electricians call it seal tight which is non-metallic so there's no way we can get any vibration or any kind of noise Transmission in the room itself and the reason we stay off all the other walls so we don't get close enough that we can get a flanking path or a vibration at higher frequencies from any other external walls and because conduit can resonate conduit can make sounds so we try to limit what we have in here and we always try to maintain this proper Fasteners proper locations of Fasteners and then keep that Integrity in mind as first thing as the floor is it's still just a floor and next we need to learn about how the walls are constructed to help with blocking the noise but also creating the environment we want to capture the noise so we start off trying to achieve a perfectly silent shell you know a very acoustic show and then from there we add the treatment inside to give you the antichloric property we call this Aero core insulation they think that this is a foam panel like you would have in a clean room but it's not the panel itself is a structural panel we use a 16 gauge skin on the outside and we have a 20 gauge skin on the inside we have what we call our magic of our composition of materials that is inside so basically with this kind of panel you get the Acoustics of close like a seven inch CMU concrete wall okay and what you notice you know with Acoustics you want Mass floor is at the same principle here well the floor is but we use a different type of system we use a heavier gauge top sheet okay and our components a little bit more rigid due to the fact that it is a floor and we use a 10 gauge top sheet which is heavier than most in the industry but as far as the performance with echo in our studies this works out really well the question I have for everyone is General understanding of metal is that tends to reflect things when you build a chamber like this why metal what do you end up doing as you complete the chamber to dead in any sort of when this room was complete if we didn't have any wedges on it this would be like what we call a Reverb it'll be super reflective it'll just be Pam you know put some music in here it'll just be really loud yeah you know but with our wedge system and our track system and we have you know a lot of calculations in that that once it's achieved is super quiet the main reason for metal is structural Integrity of the chamber and also with anything with Acoustics you want Mass you want to add to your mass and you want to add to your density so what we have inside the panel needs to be supported with a skeleton so to speak so we have our structural steel skeleton there's a lot of components that are going in there vertically and horizontally locking in every one of these panels so under case of a seismic activity or anything like that you have that but you need the mass for the Acoustics if you don't have the mass then you can't achieve what you want for a baseline because once you close the door if you get outside noise enter in the chamber through the walls it defeats what you're doing inside yeah so we use two types of wedges fiberglass wedges and metal wedges they both perform differently and the higher frequencies as far as the data that we've done from the perforated metal wedges so the application that you're using will work better for you the wedges themselves the things that absorb the noise and help us get the noise floor and characteristics we want there are a lot of reasons to build them in different ways and we'll talk about that more later in the video once they go in before we get there let's talk about how the air conditioning is handled this is critical because we need some airflow so it's not a tomb but also so we can run heat loaded tests and track the fan curve in real time while still maintaining a Target ambient temperature but AC is loud and we have to figure out a way to deal with that noise unfortunately someone else has done that for us and Dave can explain it I mean I know what this is but I'll let you explain it that's a screen window you know this is that's the balcony yeah that's the balcony so we can charge the tenants extra yeah that's where the way that's the wizard it's a very busy man he sticks his head out the window you're gonna have a horizontal silencer and it's going to be mounted externally on the wall and that's going to be lagged into your AC so your AC will come in through this this will be your supply and on this opposite wall over here we'll have you return so you'll have your airflow come through your room and keep your room at the uh the ambient temperature you desire why why flax why so much Flex we talk about that too avoiding hard angles stuff like that yeah you want to have your airflow controlled as far as you don't want any sharp angles or tight angles and so if you're bringing the airflow into the chamber when you have a height restriction like what you have here you can't go and utilize hard duct work with and if you did it would be line ductwork which you did here which is perfect but when you want to bring it into the chamber you want the the entry of the airflow to be long and you want it to be a nice gradual turn so the airflow kind of Cascades its way in any kind of sharp turns you're going to start making turbulence and the duct work which will start acting noise before you get to our attenuators I mean once you reach our attenuators or our silencers it really slows it down and defeats it but everything you've done here is just adding to the magic and making it work a heck of a lot more so what's your next step our next step is finishing we're going to set these panels here we got a beam coming in here this afternoon you got a door at some point that'll be over here I think yep you have two actually you have two doors here you have a door on the outside that opens out which is your acoustical door with with four magnetic seals on it then inside you'll have a cage door right and that'll because you want to have the stimulation inside the room of 100 in a co-work yeah and if you don't have wedges on the door then you have a spot that's not going to be in a car you know the guys are getting the ceiling panels prepped and ready and they're putting the air core insulation and to get back to that the reason we use this is we don't we don't like to have we use a double joint system we use an acoustical caulk that we calibrate the size of the bead and that goes into the Batten system which we actually which we call the uh these These are H battens and what we have is inside the corners of these H buttons we seal them with acoustical caulk then with the insulation inside that way the air space that's not contained in what's caulked there's no reverberate Noise Okay and even below this floor there's insulation even though the panels are insulated around the perimeter it's also insulated underneath the floor so say if there was some reverberant noise that was bouncing around it wouldn't create an echo chamber under the chamber right it gets captured in there as well that makes sense yeah so so you have every little facet has been looked into yeah so you haven't really excellent spot and a great Chamber coming up can't wait to give it to you yeah I'm looking forward to the next updates so thank you for walking me through it no problem we'll catch up soon all right take care okay so we have an update it's been only one day since the last clip we filmed yeah and already he's around in progress before I get the update from Dave let me just this is currently a Reverb chamber so there's like like a two or three second Reverb which is insane it just keeps bouncing around so uh Dave I don't know if we built the wrong chamber or well if you want to continue it yeah well it always starts off like a Reverb like we mentioned yesterday and uh from the next steps will be the wedges yeah so what did you end up working on the last day today what we did is we secured the beam last night before we left yeah and made everything structurally secure before the end of every day every work day today we installed all the ceiling panels and we've installed this whole front wall and sidewall locked everything in everything now is plum true it's Square it's ready to go we have the finishing touches to do we have the door frame to install then we're going to start the wedge track and then we'll start wedges so we took some shots of the clearance between the bar joists bar joists yeah before we were compressed you had two inches now yeah you right you got two and a half now you have exactly two inches okay so it's it's enough for Acoustics we're there so we're far away from it but she's really shoehorned in there you got the bang for the buck as far as fitting it in there right it's there's still stuff that's really close and it's it's tight up there we have one of our technicians up there and he can barely move he's we only have one guy that can kind of meander his way through it's extremely tight yeah so that's what you want you want it's the largest size and the same small space you know you want to get the absorption in there you know what um what's the next step at this point well the next step like I just briefly hit on is so we've got to go inside finish if you look it up up the top of the ceiling area you can see we still have fiberglass exposed yeah we have a skirt that goes around that it's a roof apron that cleans all that up and everything else we have the door frame that goes in we have an acoustical brace that goes inside and we have some you know acoustical caulking that has to go on top and some closure pieces and then we're basically at the point to start doing the layout for the wedge track and then we'll check in whatever the next major step is at this point so okay fantastic thanks for your time thank you thank you we left Dave and his team to make some more progress and then we checked back in the next day so we're at about 10 days since starting this build out these guys move fast the floor goes in now and then after that a very complicated assembly for the door of the chamber this chamber has an inner door and outer door we have the outer noise seal door with the magnetic seals ah and this is the inner door that goes and swings into the chamber okay which your wedges will actually mount on this face so when the door is closed you have the full anechoic properties this is a sound editing matting that we put in there it kills any reverberant noise off the metal skin okay so what we do is we'll have insulation there as well and then the wedge will come on top of that so you'll have no attenuation of the higher frequencies for the thin Metals you have the test properties correct you need to have the same wedge configuration on the inside so this way here when the door is closed and you're inside the chamber it's all wedges you don't see any doors you don't see anything else and the only way you'll know where the door is is you'll see the doors the wedges on this wall they run horizontally because when this door opens up it's got a socket they nest into each other exactly yeah it's pretty cool so heavy duty sound door you got STC 53 on the door and what we have is we have quad magnetic seals so you'll have a magnetic seal to adhere to this section here and where these bolts are we have another piece that bolts on here which catches another seal so when this door closes it's it's it's it's closed it's without the case or closed the store will stop any kind of sound from coming in the chamber do you have to do anything special on the threshold yeah we have a special seal on the bottom this bottom threshold is made out of three quarter inch solid steel so it's very straight and on the bottom of our door itself which is against the wall covered up right there we have a compression seal so it's a neoprene seal so it's basically like a balloon towards the bottom it will set the pressure on that so when the door closes you have friction but it doesn't enable you enough to close the door it'll allow you to close the door or the the neoprene will go up it'll make a beautiful soundproof seal at the bottom door the magnets will engage it'll suck the door closed and Bam you got it cool that's cool and we have our bearing assemblies inside of here brace washers thrust bearings and we put this assembly together it's a tubular frame and you can't have any deflection to it that's why we use a solid schedule 40 pipe in there so when this bottom plate captures the bottom of the door we use this bearing assembly yeah this thing's crazy looking yeah this is pretty intense and it goes against the wall and we have a mounting plate that we put into our our walls that actually will support this and then we have this bearing assembly right here that locks in and then we take the top of our door and we machine this so it receives this nicely like this and once we set this in place we have three Allen head set screws that will lock that in you're gonna probably have approximately in the weight capacity probably of 600 700 pounds that's the real reason and you'll open it with your finger how about uh inside now we can actually film in here the noise is pretty yeah it's starting to be real so you want to start with the ceiling the floor where do you want well yeah like you said you have a lot of updates since our last one well the ceiling's completed uh you can see the MC cable coming down from the ceiling this is all rough in we'll have that cut it'll go back in it'll tie into our light assembly and basically all these lights are connected through a little daisy chain together they have the layouts for your for your microphone so that's all these hangers that are up here and there we use the so cable due to the fact that it's solid rubber on the outside so it doesn't resonate like a conduit would resonate when we're all done we'll tie this into a bell box with a stainless steel cover plate we'll put acoustical felt on the back side of the box so you can slide it on this beautiful lvt floor yeah and we don't want to scratch yeah so the floor panels themselves have a 10 gauge top skin on there it was pretty thick 10 gauge is a little bit over an eighth of an inch so that's our top skin and that's a lap joint so it's a really tight acoustical seal for us and then once we do that what we do is we run perpendicular to that we run a it's called zip board it's a pre-engineered heavy duty tongue and groove Plywood And we run that perpendicular to the floor so our floor panels are we're running this way and when we're on this way with the zip board then on top of that then you have your lvt flooring which just has an underlayment in there as well which gives you another sound absorber as well the tongue and groove uh we talk about off camera but is also significant for assembly and can you walk through why you prefer that as opposed to square miles yeah yeah the tongue Groove you want a subfloor wood you want a high-end board that's why a kind of trademarked it when I call it the zip board but it's a pre-engineered tongue and groove it's made for flooring for uh for sheathing on walls it has a high strength to it it doesn't deteriorate it can get wet it won't mold it doesn't have a lot of other characteristics that plywood would have right and also being tongue and groove when you screw it down to the floor if you have square Edge plywood you have to put a lot of screws along the seams and then those seams can eventually pop which can create a flanking path or can create just a squeak yeah you don't want you don't want the two edges of the boards just to squeak to each other yeah tongue and groove there's no way it's a squeak-proof floor we got back to top talking about the silencer for a little bit because it's a very important part and a very specialized part of this build that a lot of sound Chambers don't accommodate for the most part we'll disable all the building AC when we run these tests however in scenarios where we need to run a heat load on the system we still need air supply to the roof and we'd also like Air Supply to the room when people are setting up for tests so it's not stuffy so here's some more from Dave about how that works and then also how the wedge track works we bump it so it's radiused because you want to do is you want to have the airflow you don't want your airflow to come against a flat surface because you get turbulence and turbulence is noise so we basically we bumped the end of it so it's radius and it's conical on the outside so so the airflow kind of Cascades around it it enters the silencer very easily the silencer is for it's like a large Muffler if you want to look at it in that perspective but on the inside like you notice that Bethel the baffling and the perforated metal the sun absorption material inside that so it's a huge silent cavity right so you've got another end of it and just yell at the top of your voice we wouldn't even hear you well you had your actually it's still up there one of your speakers yeah because this you're showing me the other day like pulling this out and not changing the volume putting it back and the the amount of like the DB drop yeah it is insane yeah well it deadens it as soon as it goes in and you can't even hear it in the row and now we have these Corners are all prepped I mean if you look at the way our assembly is as far as the spacing it's all because of our internal treatment now Conor and I built all those this morning so they're all pre-assembled to go with these Corners the floor is completed we're going to hang this caged or it's in the cage door then we can start with the interior treatments right now the rain look kind of a a rough scenario we have them just up there we're getting ready to do that door that we're talking about let's see if Connor's bringing in more wedges now so then we're getting ready to start the walls yeah so this elevation is critical for us we start right here we'll have our quarter fill a piece here and then we'll feed from back here look like like I mentioned we our wedges slide in yeah this area here allows us to slide in so we can build this wall then we build this treatment in this corner we'll build this wall we'll do the treatment in that corner we'll Build That Wall and then we kind of close off at the door over the next day or two the team finished the project and it looks amazing we still have plenty of exterior touches to do and we'll cover those in the next two parts of the series alongside the validation from a third party that the chamber works as it should the attention to detail here from Dave and team really shines through and a massive shout out again to John our general contractor for all the work that he put into the project including some of the finer touches you can see traces of all of the team's detail everywhere in these shots but it's best to hear about some of the finishes and the tacticals from once again Dave it's done and the surrounding room is getting close to done also this has been a hell of a project got a couple things loose like we need we're waiting on AC contractors to come in and finish some of this stuff ceiling tiles I'll talk about separately but these are an acoustic actually he recommended them acoustic ceiling tile yeah so Armstrong Tundra it's a very dense style it's excellent for Acoustics yeah and so we're trying to even kind of dead in the outside room too this is the pass-through this is probably worth talking about because anywhere there's a hole in the chamber is a place for sound to get in we have three pass-throughs here this way you can separate your low voltage from your high voltage and what it is um we make the composition of this to replicate the exact panel itself so it's the same thickness and the same noise deadening and STC quality is what the wall is there's a vestibule inside of there that's full of insulation and sheetrock and what we did is we manufactured this out of an ABS plastic so it has a high density to it and what you see on the outside you also have it on the inside so you have a complete dense cavity there so that counters your show like if you were going to run like your low voltage through here you have enough separation to run your high voltage in here and then say if you had a specialty test and there was a certain plug that you were trying to run you could actually fit the plug with its end on it and through the other one and this is something that uh Dave ended up fabricating in the basically the backyard on Sunday yeah we did that Sunday and it came out great thank you all handmaids oh thank you it took a little bit of a it was an Endeavor especially with the heat she came out nice though it came out beautiful yeah you made some comments about the heat that we won't repeat on Panera but they were very entertaining yeah but you have a champion everything's a chamfered edge and we have a gasket behind this and also a gasket on the interior so these are the switches one is for the interior Outlets correct and one's for the lights and that we should also bring up the uh the gap between the chamber and the ceiling is intentional too correct the chamber like we know is on three Hertz Springs so the chamber is actually live it moves so you want to make sure the chamber is always decoupled yeah and this is what you have right now the I I think our audio levels will probably do they sound different Vitali it's quieter yeah I mean it's better so our our I don't know how much it'll pick up on camera but the last chamber I filmed in was a fully anechoic one I remember it just it feels like it sucks the bass out of the voice sometimes because you lose all that Reverb correct so um yeah you'll notice a lot of people going like this yeah the only Echo I'm hearing is outside the chamber yes so absolutely um so I don't know let's start with the door this thing is a massive door there's two of them Cotter can you get the outside door please yeah so here we have uh Connor expert build technician who's acoustical technician common clutch uh says outside door I feel like I I'm like doing my normal projection and shouting but it feels so unnecessarily loud so when you close this door you have the seal to the chamber this is what's sealing off your chamber then we construct this door here which we call a wedge basket door you can close that one if you want yeah on this interior door is also uh it's pretty cool just because the way it sockets into the other wedges and then this is a magnetic seal on this one as well so when it closes it holds it shut and now you have the anechoic property because if you didn't have the wedges on the door it wouldn't have the same results for the test of the chamber other small features you have a foam door stop in here correct it's like small touch stuff just prevent paint from chipping if they hit each other they give you a soft stop for your door as well so when you open the door it'll that you don't engage the two wedges together it's like you said they won't get locked they won't scrape each other and it makes a nice Finishing Touch now you painted the uh the handle uh chassis I guess frame yeah and uh it actually looks really nice I like that thank you metal well it looked like it uh accentuated with the blue yeah and this is your custom blue color so this color really looks uh impressive it's beautiful in there the floor also we can see now it's been under either cardboard for about a week correct and uh this came out really nice too yeah that was that was your choice on that as well and it works out really nice because you have the underlayment and it pops in there instead of the regular vinyl VCT this is a this is the first this is a really uh it's a high-end floor but it's a beautiful floor how about the the ceiling we haven't talked about really at all other than the wedges so can you walk me through like why is that mesh rack there between the light and the wedge and uh and anything else that um okay well what we do is we with this chamber here like we're going back to the beginning you were a very tight height constraints so you couldn't bring in any of the electrical through the roof to where independent boxes were on the roof for a yule inspection so what we did is we had to bring the wiring inside the chamber so it's Daisy chained with together with the MC cable so those brackets there we'll put everything together in one unit with a UL listed box right that can be inspected by an electrician can be serviced by yourself if you have an issue with the box it's easily accessible as two screws on either side you drop this down and then you can remove it and do your work on it also the elevation like you noted is very important because you want the the bottom of the light to be above the peak of the wedge so this is set for an inch inside the wedge if it's any higher you get Shadows if it's any lower you get Reflections right so you really want to just make sure you got that the right desire hey John a shout out too he's our normal GC he did the whole building yeah the electrical here like we mentioned before we design it we like to use an so cable and the reason we do this is because we can also put acoustical felt on the box this way when the box is on the floor and it slides around right it doesn't have any noise and also it won't damage the blocks of the floor if somebody drops it or drags it or drags it or whatever is exposed yeah and instead of putting the plug on the wall where you're actually bringing a cord to here and you're actually always pulling on that pulling on that which eventually is going to loosen up yeah this right here brings your power source to you here so say you bring it to here and you set it down this is an so cable it's not it's a heavy cable so it stays to the floor it's not a trip Hazard right it brings your power to what you want we have two of them located in there so you have eight outlets in this chamber which is quite a few knowing that you can also bring in power there yeah then afterwards you just roll this back up and you're doing a test and you just basically tuck it away I want to make sure anyone in the audience I know a lot of Engineers from like AMD Intel and video watch our stuff especially this kind of stuff so I want to make sure everyone uh in any kind of decision making position from those companies understands that stuff like the felt on the boxes is a Dave and Viking attention to detail type thing where like people who watch our reviews I think are you all are very familiar with uh everything we talk about it's all attention to detail the biggest time we kind of have praise or criticism for like PC building companies it's bad or good attention to detail so uh it's those it's the small touches that either way the way I always look at it is if you got someone who's putting felt on a box so it doesn't scratch the floor then he's probably doing a pretty good job with all the big stuff that really matters not to mention touching Up A Screw head so you don't have everything's painted everything matches in the early days people you go you go that so far that you paint every screw head I'm like yeah but you know what like end users like yourself that are into that realm of you know Precision will look at that painted screw head and they look at it and say geez that's that's the quality thing right so they look at that as if they're painting screw heads and they're felt in boxes I feel comfortable that they did the right procedures on building my channel yeah you know so it is something that you know a few people recognize it but the ones that do it's important so thank you yeah yeah how about um for on a tactical side to like geometry of the wedges uh we were kind of getting into some of the wedge discussion previously you know something about I guess the original sort of wedge designs and some some of the decisions or history there Echo uses the stuff from Dr Leo baroneck he was an MIT professor and he actually built the first chamber in Harvard I think I think it was just after World War II but the wedge geometry is critical to how the wedge performs in the chamber I mean you have the slope of the wedge you have the the flat or the landing of the wedge and you have the depth of treatment of the wedge the depth of treatment directly correlates to the lower cutoff frequency so if the wedge is longer the correlation for the color frequency is going to go lower and lower and then the size of the chamber and all that works relative too that was one of the things we had looked at 100 Hertz Chambers as an option one of the uh I guess it makes sense now I was trying to remember why we didn't do it other than cost and um I think you start losing more usable space in the room correct and we physically can't fit a larger room so correct you need all that is the geometry you have to work it all together with your space because the lower the frequency the bigger the wedge you know and so the bigger the wedge the bigger the chamber right unless you have like you say you have no space yeah but what we use here is our Echoes is 50 perf used to be used a lot Echols found out that using 53 perf gives us like like almost 100 transparency even though you see a metal wedge the studies that we've done on this give us 100 transparency for absorption which is okay which is fantastic and with a metal wedge there's three factors that you look at you look at the thickness of the material what the wedges made of you look at the size of the diameter of the hole and you look at the open perf size and that kind of works in that correlation along with that same formula of Dr baroneck so like I mentioned this is 53 so you have like the note zero percent you know 100 transparency because I think they brought up to like around 10 000 Hertz there's like zero transparency you don't you don't catch the metal at all as a reflection it's all involved so it works really really well that's cool it's a fantastic wedge too the doctor Dr baronneck right he was he he he went to Cornell I believe and he went to Harvard as well he he worked on his geometry and Echo Industries back in the day there was Oliver Echo he was the founding member of of eckel and he worked directly with Dr verinek on design and Dr baronneck would kind of design the wedge and then Oliver Echo would build the wedge then they would test the wedge then they would build design it then they would build it and then it would test it they were tested like an impedance tube which is a long tube that they put the wedge at the other end and they put the microphone in there and then by changing the the location of the microphone they could do the different testing as far as on the wedge okay so it was uh a lot of research and development that was right after World War II and they built the first chamber if I'm correct I think it was at Harvard is where they built it cool you know so it's it's I think it still might be out there I'm not sure that's the Chamber walkthrough I'm excited to start using it I think Patrick's going to be in here pretty much immediately to start figuring out the test setup and uh Patrick was our uh our clutch door technician as well on the door so but yeah it was great I also want to add something to it to your your viewers that you know Steve's the real guy and he's just like you see him on TV and on the views he's a good guy and straightforward guy he's given us a lot of hospitality we really enjoyed this build and I was wondering I appreciate it thank you for everything absolutely and Connor has really enjoyed working with you and and also the knowledge on the the gaming because Connor's the big gamer yeah right yeah I know you guys did a great job and thank you everyone for watching this segment we'll have some more after this to talk about how the chamber works so Dave thank you thank you take care everybody of course this bill didn't go without its challenges but the team that we had on site here did excellently to tackle them as they came up we'll have part two where we do the validation of this chamber soon and we actually have already used this for the frackle Terra in our upcoming ITX reviews and the Rog Ally and as always go to store.gamersaccess.net to support us directly because it's gonna take a while to pay this off you can use code chamber for 10 off of anything on the store while the code is active and if you need any kind of Studio Listening Room Etsy room or Anna Cook chamber we can highly recommend Dave and Viking Enterprises as a personal sign off too I loved working with the team here and I've missed seeing them in the office bright and early every morning to work on it and we hope to see them again for future projects thanks for watching we'll see you all next time\n"