(May 4, 2021 at 8:47 am)onlinebiker Wrote: No.
Doppler effect is obsevable only from an observer' s point of view.
That is - the audio frequency of the moving object (like a train coming towards you) in reality is constant - but APPEARS to the observer as ascending in frequency.
The same can be observed by a moving observer and a stationary source of sound.
Trust me - I KNOW Doppler effect.
I was taught it back in 1981 when I was a Coast Guard Radioman - and SARSAT went on line. SARSAT uses Doppler shift - observing an EPIRB on the ground and by measuring the intensity of the doppler shift can calculate two possible positions of the EPIRB transmitter on either side of the satellite' s polar track....
You are correct, but so am I. I never said anything that contradicts your explanation. Frequency is dependent on observer. The source frequency remains constant, but frequency of detection depends on the relative speeds of the source and observer, and its relation to the speed of sound.
Trust me - I KNOW Doppler effect.
I am a physicist.
