hi all,
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.
cheers Miller
On Fri, Aug 29, 2008 at 10:07:30PM +0100, Claude Heiland-Allen wrote:
Hi all,
Referring to Miller's book [1], 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).
[1] 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,
Claude
http://claudiusmaximus.goto10.org
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