"Bob Cain" wrote in message
...

Sorta. From what you're saying. the *origin* of each individual wave can
take place at any point within the throw of the diaphragm. Is that
correct?

Not sure even how to define the origin of the wave in those
terms. Thanks for that. I just realized that the
assumptions which are being made about that are the flaw in
the intuitive description of "Doppler distortion."

I'm having a hard time envisioning just one wave being started by one thrust
of the piston. Maybe if I fully understood that rather than the quite
satisfactory "it just does and that's how a speaker works" mentality I'v
always had, I could argue intelligently one way or the other.

I added rec.audio.pro to this because it's highly relevant
to the thread on this subject that is happening there.

Great. Feed me to the wolves. Hey, RAP folks: I hold no degrees in
electronics, physics, acoustics, etc. I do not work with audio as a
profession. I just find the topic interesting and do not purport myself to
be an expert. As I noted earlier in the thread, which was not cross-posted,
if I seem condescending, it is because I am trying to explain things in
simple terms to myself. Since my logic is usually sound, my guess is that a
basic premise somewhere is wrong or incomplete, hence the detailed and
simplist explanations.

With that said, help me out here. I can't get myself away from the
assumption that since a speaker diaphragm has a throw of a certain distance,
then the waves started by the diaphragm may be started from any point in
that throw. As such two waves which are created a certain time apart may end
up traveling different distances to reach my stationary ear, thus a Doppler
shift. Measurable? I dunno. Discernible to my ear? Probably not.