ProInfo > Noise Forums
You can browse the newsgroups to see if there is any information on what you seek, but remember the information is free and generally you get what you pay for (Ed: isn't NoiseNet free?).
comp.dsp - the group for people interested in computing digital signal processing solutions, FFTs FIRs IIRs etc.
alt.sci.physics - general physics but occasionally acoustics related questions are posted.
rec.audio.tech - includes discussion on audio equipment, speakers etc. There are other rec.audio groups which may be of interest.
alt.support.hearing-loss - group for sufferers of hearing loss
alt.support.tinnitus - group for sufferers of tinnitus (ringing or other noises in the ear)
bionet.audiology - matters relating to hearing and hearing loss
bit.listserv.deaf-l - forum for deafness sufferers
uk.people.deaf - uk forum for deafness sufferers
alt.society.deaf - usenet seems an ideal communication medium.
comp.speech - speech recognition and simulation
comp.sys.ibm.pc.soundcard.misc - various discussion of use of internal sound cards in IBM compatible computers.