Natural Science Forum / Physics / Acoustics / June 2007

Title:
Reconstruction of acoustic source strength distributions and their
interactions by inverse techniques
Authors:

<re-posted in hopes of getting reasonable responses>
Hi:
I've always heard of infrasound having the ability to be lethal. What
about ultrasound? Can ultrasound be hazardous?

I've always heard of infrasound having the ability to be lethal. What
about ultrasound?
I'd love to hear of a case where infrasound was used for therapy and
actually cure or help treat ailments.

<re- and cross-posted to relevant NGs in hopes of receiving relevant
responses>
Hi:
What audio artifacts are specific to the analog variable-density

Meeting room in the shape of a long ellipse with walls of curved glass.
The walls are a very expensive feature (using electric glass that can change
from transparent to translucent) so the client won't change or put
anything opaque in front of them.  All he wants is some magic to ...

Hallo everybody,
I am looking for a formula easy to use to calculate the resultant of
sound attenuation (Rw) through different layers.
For example

Anybody read the paper by Barbara Frey and Peter Hadden on potential
infrasound from wind turbines and health effects; "Noise radiation
from wind turbines installed near homes: effects on health", February
2007. Interesting reading for those involved in assessment re wind

Dear Professor/Expert,
for first  I am sorry for my English,  but I am a Mathematician a
Computer Mathematician and my English is just technical English.
I write you not for me but for one of my friends, involved in

Lets say I use an fft to establish the spectral content at the attack
point of 5 recorded notes (single monotonic notes). Lets say when I
sum the harmonics accross a single fft window, for each note attack, I
get -

I m looking for papers, thesis, and all articles (technic or and
scientific) whitch can give me good informations on impulse reponse
measurement techniques.
 This aricle seems to be a good one:

hi. everyone...
During the high speed motor test over 60krpm, peak noise of 2x of
rotating speed is dominant.
As you know, this peak noise give much annoyance to human.

I studied acoustics 30 years ago, but can't remember this!
Suppose I have an effectively flat planar noise source, and put a 10
cm insulation screen in front of it, achieving a noise reduction of x
dB,

Hi,everybody,
I am working on a duct acoustics problem. I wrote a Finite Element
program solving the acoustic field in the NASA Langley flow-impedance
tube. Now I am searching for the benchmark data to validate my