Karl Uppiano wrote:
The flaw in this argument is that this set up assumes it is the same as
the linear superposition of the of the two signals in a single transducer.
it is not.


A single loudspeaker reproducing the linear sum of two different
frequencies. The higher frequency "riding" back and forth on the lower
frequency. Will that not affect the wavelength of the higher frequency as a
function motion of the diaphragm due to the lower frequency, assuming the
speed of sound in air remains constant under these conditions?




Go look in a good text book for the words 'linear' and 'sum'

Ian