Natural Science Forum / Physics / Acoustics / September 2004

The debate is over Bob.  Dynamic Doppler distortion exists whether you
care to admit it or not.  The only thing that is presently missing is
confirmation of Art Ludwig's theoretical analysis by direct
measurement of Doppler distortion in a tube.  That confirmation is

Im wondering what is used to put out really low frew sounds? Im looking for
5-10Hz at a pretty high amlitude. would it still be a speaker with a cone,
or say a plate driven by some other means? im a total newbie and not taking
any classes in this yet. just wondering.

I have a question concerning sound waves.  I know that sound waves
propagate in three dimensions when transmitted from a source to my
ear...but how does the "depth" of the wave affect what I hear? (For
the purposes of this question, the length of the wave refers to its

I am a manufacturer involved in making precision optical components for laser
equipment. We are now in the process of having a product manufactured that
specifies the use of Schlieren grade fused silica. This product was designed
back in the early 1980's and the product has been ...