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The reverb room actually sounds cooler: > ...a reverberation chamber with bowed aluminum panels in which he sounds the same from 300 feet away as 3 feet away.
Reverb rooms are much easier to build (and more common) than very-quiet anechoic chambers.
Anyway, I didn't know that before today :)
yes, noise is pollution. I would tax cars based on air and noise pollution and nothing else.
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Reverb rooms are much easier to build (and more common) than very-quiet anechoic chambers.
Okay, but are perfectly diffuse rooms really more common than perfectly absorbent rooms? Anyway, I didn't know that before today :)
Any acoustically well-designed movie theater (THX or HPS-4000 certified among others), performance space, concert hall or auditorium will be decently diffuse, at least at higher frequencies.
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I've been in a few before. They are used a lot for testing the RF properties of wireless products. They basically let nothing from the outside in, and allow for no reflection on the inside. Thus you can isolate the characteristics of your device from any other possible surrounding noise. I usually get a headache after being in one for awhile, but I always assumed that's because the pointy foam shit smells like fresh…
The term is used for both RF and Audio wave absorbing rooms, but in this case they are talking explicitly about a room that doesn't reflect Sound.
The original plan was to build a 50ft by 60ft by 55ft chamber, with about half of it being underground. Given the exterior noise level of around 20 dBA (the plant is located in the wilderness), the thick concrete walls of the facility, and some additional noise and structural isolation he might very well beat Orfield's record with a much larger chamber (meaning it will be anechoic down to a lower frequency). If he can get the funding.
If you're ever in the area, Ron is a friendly guy and he'll be happy to give you a tour (he's on LinkedIn).
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The term is used for both RF and Audio wave absorbing rooms, but in this case they are talking explicitly about a room that doesn't reflect Sound.
Wouldn't they be the same thing, just "tuned" to block out different frequency ranges? I'm guessing the tuning is based on the material and shape of the foam, and thickness and material of the walls? It's all waves.
Earlier quoted context omitted.
The term is used for both RF and Audio wave absorbing rooms, but in this case they are talking explicitly about a room that doesn't reflect Sound.
Wouldn't they be the same thing, just "tuned" to block out different frequency ranges? I'm guessing the tuning is based on the material and shape of the foam, and thickness and material of the walls? It's all waves.
EM waves vs pressure waves, they're not the same thing (although the math is basically the same, just with different constants). Something that affects an EM wave won't necessarily affect a pressure wave - a Faraday cage for example will block EM waves but won't do anything to block sound waves.
Earlier quoted context omitted.
The term is used for both RF and Audio wave absorbing rooms, but in this case they are talking explicitly about a room that doesn't reflect Sound.
Wouldn't they be the same thing, just "tuned" to block out different frequency ranges? I'm guessing the tuning is based on the material and shape of the foam, and thickness and material of the walls? It's all waves.
While they are both considered waves, it is not frequency regimes that differentiate acoustic pressure waves and RF waves -- RF waves can be anywhere within the "audio" spectrum and beyond, and audio waves can be well into the ultrasonic range and into the UHF regime.
The idea of the anechoic chamber is the same (blocking all reflections), but it is not just as simple as tuning to different frequencies. They do however need to be designed for a specific frequency range.
I am not an expert on anechoic chamber design (or acoustic wave propagation for that matter), but an RF anechoic chamber is not the same as an acoustic anechoic chamber, although it will show some functionality as one. Does that make sense, or am I just confusing the conversation? It did when I started writing all this. :/