Natural Science Forum / Physics / Acoustics / March 2007

On what environment can the speed of sound be 300 km/second and mean
free path of air be
10^-1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
nanometer -- i.e. 10-to-the-power-NEGATIVE

May I know the difference between RT30 and Early Decay (EDT) in real
application ?   E.g. If we talk about a large hall with the ceiling at a
very high level, then the reverberation time measured in RT30 is much longer
than that measured in EDT.  So, which parameter shall be used ...

Puppet_Sock <puppet_sock_at_hotmail_dot_com> wrote in
http://groups.google.com/group/sci.physics.research/msg/029a72c00e1c69c9?dmode=s
ource&hl=en&output=gplain

Does anyone know of Anechoic Chambers in the Washington DC area that
can be rented for personal or small business use?

Perhaps in the group you already have stuff like it, but I'm tossing out
there some software that I wrote for myself, which does audio spectra in
real time, particularly geared towards people monkeying around with their
own music and sounds.

Are there any tools out there (software, or just plain analytical
formulations) to analyze segments of music. I am new to the area
of Music analysis and would like to know of existing work done
in various types of decompositions (other than spectral) for music.

I have a transducer that I am trying to characterize and one of the
things I want to check is the receiver sensitivity.  But I'm not quite
sure how to go about doing this.
I know that receiver sensitivity is a measure of how well a hydrophone