Re: [linux-audio-user] Room noise + acoustics (was: SNR (not audio))

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Subject: Re: [linux-audio-user] Room noise + acoustics (was: SNR (not audio))
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Wed Jul 31 2002 - 12:11:19 EEST


On Tue, Jul 30, 2002 at 12:12:30 -0400, Paul Winkler wrote:
> On Tue, Jul 30, 2002 at 05:00:35PM +0100, Steve Harris wrote:
> > ... AFAICT you only calculate axial modes?
>
> Yep. The books I've read suggest that anything else is
> hard to calculate and hard to correlate with reality, so
> not worth the trouble. But axial modes are simple and very likely
> to be observable in practice.

Its not hard to calculate, but they are less liky to be stabel I guess.
 
> I forget what books... a couple of "building your own home studio"
> type things.

Cool. maybe I should go to a bookshop. The web doesn't seem to have
much.
 
> > I will work on it some more soon, and see if I can get it to graph the
> > difference between the ideal and actual.
>
> ah... but how do you measure the actual? where do you put the mic?
> you'll get different results with different placement...

I meant actual, theoretical against ideal theoretical.

Icidentally I came across a program on freshmeat called drc that claims to
calculate general room repsonse from an impulse and some room data.

I'm tempted to just flood the room with whitenoise and measure with a
mic at various positions.

- Steve


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