That's what I thought.
That's pretty much answered my question.
If there is no relative movement between the source of the the sound (or energy, we were actually discussing radio waves from a DVOR air nav installation) and the receiver, then no Doppler effect is experienced by the receiver.
Yes, I understand about how the movement of the source of the sound compresses the sound (or energy) waves, and that was part of the animated discussion in class we had. I'm glad to hear that repeated. Do you have any reference to this fact?
In my example, each sound emitter emits a constant...
If I am stationary and a sound source moves towards me at a constant velocity, I will hear it (the sound) increase in frequency until it is adjacent to me and then as it moves away from me, I will hear a decreasing frequency.
Fundamental stuff right? It works with radio waves and light which is...