Natural Science Forum / Physics / Acoustics / March 2006

I am not sure about this, so I wanted to confirm about this.
If two acoustic signals interfere along their path, but the receiver is
not in the interfering region (e.g. the direction of propagation is
opposite for both signal) will the signal still be receiver faithfully

I am currently looking for some information about digital ANC Headsets.
I have bought an ANC book from KUO Active noise control. But in
conjunction with ANC headsets there is only one chapter. Therefore I
have done some more inquiries and found an really interesting Paper.

I'm looking into the possibility of using a 32 feet diameter by 8 feet thick
transparent, inflatable disk to provide noise isolation between two spaces
connected by a 32 feet diameter overlook.  The analysis looks good.  Anyone
know if this has been done before?

Please note the newbie above!!!
I've start looking at physics and am a mature student and on the course
I'm doing we were given the follownig questions and answers, but no
explantation. Are the answers below correct?

i stumbled upon this little piggy while looking for reading material. i've
been reading about infrasound and it's use lately and i was quite intrigued
by this sensors design; it has no microphone. the name alone got my
attention: (O)ptical (F)iber (I)nfrasound (S)ensor.; OFIS.

In my physics class we are having a discussion about how the eardrum
works. We understand that the eardrum vibrates and that vibration is
transferred through the ear and eventually interpreted as sound. Our
question is "Does the eardrum vibrate at every frequency from 20 Hz to

Hello! Everyone
I have a curious things about compressor noise.

as dominant noise source. There are many peaks of BPF in spectral graph

i am doing some research on acoustics and particularly the nature of
room reverberation. this led me to some harsh number crunching using
matlab.
i am working with polynomials having hundreds of terms and very high

When I hold my guitar close to my amp I get feedback and using effect
pedals it is possible for me to color this feedback, and it is also
quite possible, although not always easy, to create feedback which is
esthetically pleasing. What I'm interested in doing is creating an

Does anyone have any sources for sound rated (STC or other) roll-up bay
doors.  URL's would be greatly appreciated.
Thanks
   Matt

I have a newbie question and would be grateful for the benefit of your
expertise.  I moved my company to a new office.  It's one room with high
ceilings and plaster walls, and you can hear everything everywhere.  My
first step is to put up sound absorption panels on the walls.  ...

Hi, I am looking for information about infrasound.
Any pdf files, scanned books/magazines would really help, because,
where I
live, I cannot get/find ANY books.

I have some personally recorded data on DAT tape (outdoor sounds) that I
want to copy onto another digital tape. That recorded data stream
includes (per the TCD-D100) the real time of recording, which is great
for data reduction.