Smart Electronix Anechoic Room Simulator

[Space Boy]

if you look at it this way you're probably right - so your theory is that there is no perfect anechoic room in reality (just like there is no perfect vacuum in reality) - the so-called rooms have the numbers of occuring echoes just drastically reduced... - right?

Right.

[Meffy]

the so-called rooms have the numbers of occuring echoes just drastically reduced... - right?

Exactly so -- reduced to a single, nearly inaudible echo caused by the surface of whatever sound-maker you are recording.

That's why they're called an-echoic. There's not a lotta echoes, just an echo. ;-)

Meffy

P.S.: Do not believe the above; etymologically speaking it is highly suspect.

[TotcProductions]

P.S. I was joking about the cut down version of Convo Boy

Whew. :wipes sweat off brow:



peace!

[Borogove]

I guess it is kind of unconventional to suggest measuring an IR in an Anechoic chamber - but therein lies the potential for an innovation.

I can't be the only one curious to find out.

Remember you're also measuring the IR of the mic.

[Space Boy]

On the accuracy of Anechoic chambers

Check this out

http://www.meyersound.com/support/papers/LF_polar_data/

[stefancrs]

Wtf. I was not joking, and I was right in what I said. An anechoic room will not have any effect on an impulse, and if you record an impulse response you will only get a gain difference and no echos / trails whatsoever.
Granted, anechoic rooms does not exist, but that has nothing to do with what I said. Twats!

[stefancrs]

Hold on you twats, how does the actual air effect the sound? What is the frequency response of air? Also, does sound, without actually bouncing on stuff, also travel indirectly within the air?

TWATS!

[haydxn]

[stefancrs]

Because if the air itself affects the transfer function of the non-existant anechoic room, that should've been simulated in brams plug.

[stefancrs]

Now, if I only learned to use the edit button instead of making more posts.... I know, I'm such a twat.

[TotcProductions]

Now, if I only learned to use the edit button instead of making more posts.... I know, I'm such a twat.

All hail king Twat!!!


Or would the twat make him a queen?

peace!

[stefancrs]

I'm quite certain the air itself would delay the sound btw.
Place an non-audio-reflective wall of a limited size between you and a sound source. Will any of the sound reach you? If so, air itself introduces delays and hence filters the sound etc.

[farlukar]

total absorption in dB/m for air 20°, r.h. 50%
    100 Hz - 2.94·10-4 dB/m
   1000 Hz - 4.66·10-3 dB/m
 10000 Hz - 1.59·10-1 dB/m
100000 Hz - 3.28 dB/m

[edit]Why isn't there a [sup] tag?

[93143]

Air does filter the sound, but it happens by energy absorption (see farlukar's post). Delay... well, air has a characteristic sound speed like any other material, but for a point source and a point receiver, there's only one delay (travel time) and it doesn't cause any filtering.

[Well, not much. There is a frequency dependence to sound speed, but it's small.]

[duncanparsons]

To reduce the effect of air, why not make an anechoic chamber a vacuum - zero side effects, zero echoes.. perfect!!!

Blimey, all these posts and no one spotted it yet??? I'm a genius - don't know what the rest of you are doing here..

8)

DSP