Carey Carlan wrote:

As a non-mathematical type I understood Doppler distortion to be caused
when a high frequency was generated by a driver already in motion with a
low frequency.

That's the definition. What is needed to put the question
to bed is a general dynamical equation for what happens at a
piston-air interface which will yield that result when
applied to a sum of such sinusiods. No such equation has
been forthcoming in places where it should be a trivial
exercise for those in attendance.


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein