RE: The Doppler Effect......
May 4, 2021 at 8:47 am
(This post was last modified: May 4, 2021 at 8:55 am by onlinebiker.)
(May 3, 2021 at 5:40 pm)HappySkeptic Wrote:(May 1, 2021 at 10:57 pm)Brian37 Wrote: Don't ask me about the actuall formula or answer with it. Pretty sure it will make my head explode.
But if I am not correct, the overall concept is this.
The further away a sound, is approaching you, say like a fire engine with siren's on, is going to be lower in volume from your point of view, the further away it is from you. But the closer it approaches the louder you will precieve it, but after it passes you, the lower the volume gets from your point of view as it passes off in the distance?
Not based on formula, just overall concept, am I getting that correct?
When a sound source is moving toward you, its frequency or pitch is higher (think soprano instead of bass).
When a sound source is moving away from you, its frequency (or pitch) is lower.
You also get a higher volume when a sound source is close to you. If someone hits a bell right in front of you, its louder than if it is down the street.
The two effects together explain the sound of a fire engine coming toward you and going away.
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....
