[PD] recirculating delay line reverberation time calculation
mpuckett at imusic1.ucsd.edu
Mon Sep 1 10:44:42 CEST 2008
I don't think anyone knows the answer to this. Traditionally, ever since
Schroeder's reverberator, I think people have used delay times within a ratio
of 1.5:1 of each other so that any old mean works OK.
On Fri, Aug 29, 2008 at 10:07:30PM +0100, Claude Heiland-Allen wrote:
> Hi all,
> Referring to Miller's book , and having experimented with various
> delay times, I'm wondering what the "average" delay time used in the
> text is. If all the delay times are close to equal, then using the
> arithmetic mean as "average" gives me a reasonably accurate
> reverberation time calculation. But the more they differ the worse the
> result is (comparing with measurement against my implementation).
>  http://crca.ucsd.edu/~msp/techniques/latest/book-html/node111.html
> Intuitively it seems that the sound recirculates more often (and is thus
> attenuated more) through the shorter delay lines, but this is obviously
> not taken into account with arithmetic mean. I'm thinking something
> like harmonic mean might be better (but I tried it and it wasn't a huge
> improvement, nor was geometric mean).
> Any clarification would be enlightening, thanks,
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