On Thu, 20 Apr 2006 05:50:43 GMT, AZ Nomad
wrote:

On Wed, 19 Apr 2006 17:52:27 +0100, Stewart Pinkerton wrote:


On Wed, 19 Apr 2006 14:14:38 GMT, AZ Nomad
wrote:

On Wed, 19 Apr 2006 06:53:12 +0100, Stewart Pinkerton wrote:


On Wed, 19 Apr 2006 03:32:25 GMT, "James Lehman"
wrote:

The effect of a Leslie speaker comes from the mixture and interference of
the back of the speaker cone, which is fixed and the moving hole in the drum
in front of the speaker cone. You are correct in that Doppler effect is
relative to the listener, but a listener can not be both fixed and moving at
the same time.

Of course he can - I am moving at a bit less than 1,000mph right now,
since I'm on the surface of a rotating planet - doesn't seem to affect
my hi-fi, though!

That's because you're on the same planet.

What if the stereo was loud enough to be heard from another planet? (and
how the hell could the sound travel through vacuum? Better call the Star Trek
script writers) You'd need to correct for doppler effect.

Irrelevant, since the question concerns speaker and listeners in the
same car, hence with no *relative* movement, and no Doppler effect.

I didn't read that in the original post. It simply asked how the sound
would be from a car going 45mph. Probably on the same planet.

Not *from* a car, *in* a car.

--

Stewart Pinkerton | Music is Art - Audio is Engineering