Natural Science Forum / Physics / Acoustics / September 2006

I am asking a question on impact sound by raindrops.
We are proposing a small cafe area on a large podium. The walls and the
ceiling will be constructed with thick glass panels. This idea is mainly due
to artistic reasons.  One of our concerns is impact sound due to raindrops

A clarinet plays a fundamental with a wavelength close to four times the
effective length of the constant diameter tube. The tone produced that way
will have a substantial content of odd harmonics with very little even
harmonic content. By over blowing, odd harmonics can be played ...

If i multiply each sample in my wav file by 0.1, will my wav file sound
half as loud?
Thanks,
Aine

Folks,
The standard recommendation for a two-channel listening setup is to create
an equilateral triangle between the listener's ears and each speaker. That's
always worked fine for me! But someone recently asked me WHY this is the

I'd welcome some advice on this noise problem.
The man in the flat above me has breathing problems and has to use
something called an 'oxygen concentrator'. Every few seconds, it makes
a sort of thudding sound. To give you an idea of the frequency of the

There's a nearby shooting range that's proposed some changes, and I'd
like to figure out what those changes mean to me.  I understand that
gun noise is directional and I'd like to get data on how the sound
pressure level varies with orientation.  Are there any references out

I need to reduce the noise from my condo ceiling mounted air handler.
The air handler does not vibrate. My condo is 900 square feet. The
noise is caused from the ceiling intake vent which is 6' X 1'. I think
the vent is too large. People with other condo's in the building

What is Graphing motion
For article on Graphing motion visit the link
http://www.studyandjobs.com/graphing-motion.html
or for physics learners

Please forgive my persistence on this topic of wireless electricity and
diaphragm-less speakers
Can electricity flow through air w/out sparking? I guess that it could
provided that the voltage is high-enough to break through the

need some clarification...
sound attenuation along a pipe is commonly 3dB per 60 diameters length for
gaz and 3 dB per 175 diameters for liquid. Nevertheless acoustic impedance
is lower for gaz...

 Recently installed a high quality PA System in a gym.  Specs required
EV Speakers (8) facing bleachers to have 70 volt transformers (60 watts
each) and two speakers facing down to give floor coverage.  The two
floor speakers had no transformers.  I used a crown CH2 amp, connected

What is the relationship between how hard you strike an instrument and
how loud the resulting sound is.
Basically, I wish to display an object onscreen for each drum beat and
I'm wondering what relationship I should use between the brightness of

I think I'm right in saying that a 16-bit audio CD has a max amplitude
of around 93dBs. If I play a sine wave a this amplitude, then suddenly
drop its amplitude to 83dBs, am I right in saying that the result is a
sine wave that sounds half as loud as the first dine wave.