Hi - I'll keep this relatively short. I'm doing an investigation into the doppler effect and I need to do a series of 3 to 5 experiments in order to prove/show something. At the moment I am a little lost as to what I could experiment into regarding the doppler effect, and how to go about it in the lab. Some ideas I've had: - Use a turntable with a speaker mounted on it, and a few meters aways on the other side of the room or so have a receiver. - Investigate into the effect of wind etc.. So, could you guys point me in the right direction and comment on those few ideas so far, as well as offering other effects of doppler that I could investigate (in the lab)? Kind Regards, Richard.