[sdiy] Simple Oscillator +Doppler Effect

[Paul Perry]

At 03:25 PM 25/11/03 -0500, Joel Kirchartz wrote:
>I'm looking for the simplest, smallest oscillator to opererate around 250 
>Hz, with a fairly large amplitude, 
.....that would be a car horn, with a nicad battery


for a physics project on the Doppler 
>Effect (if sound catches up to itself, it will make a sonic boom; 
.....that is SO wrong!



AND as a 
>sound moves closer or farther away from you the frequency changes)
......well, the PERCEIVED frequency changes, yes.

paul perry Melbourne Australia