Doppler effect?

There is a source and listener. There is a wind blowing in the direction from the source to the listener. Source makes sound. Would the frequency heard by the listener be higher or lower or the same? Does the Doppler effect come into play here?

Only the speed of sound changes, not the frequency. If the listenner was travelling with the wind the sound would have a lower pitch and he would measure the time it takes for the sound to reach him as the speed of sound.

If the wind was at the speed of sound and blowing from the listenner to the speaker, then the speaker would never hear the sounds as their effect would reach a quantum negligibility by the time the hurricane stopped and the vibrations through the air reached the listenner's ears.

The waves will be 'stretched' at the source, but compressed again at the receiver. In conclusion: No, the velocity of the medium doesn't matter.

>>2
then the listenner would never hear the sound

eck..

>>2
Only the speed of sound changes, not the frequency. If the listenner was travelling with the wind the sound would have a lower pitch and he would measure the time it takes for the sound to reach him as the speed of sound.

You are saying that the wind makes the velocity of the wave higher? velocity=wavelength*frequency ... so wavelength and/or frequency increases. I am assuming by 'stretched' you mean the wavelength is increasing but how does it compress again?

Neither of them are moving btw. If the listener was moving with the wind, as you said he would hear lower frequency because of the Doppler effect.

The frequency doesn't change. The pitch, which is the perceived frequency does change however due to the wave becoming longer or shorter

Proof :    Light Speed isn't Constant !!

There is a light source. Its frequency is fixed(following writing is on    the inertial frame of this light source). To this light    source,    an observer is in uniform approaching motion or    in uniform backward(reverse) motion. Einstein says, the    wave number of light(Usually shown as number of    waves that stays within    1 meter    of light path) that stays within the instrument    of observer(hollow tube    without    lens) changes by observer's motion. But    it's unthinkable !! Imagine such a light path :    its starting point is on this light source and length is fixed as A(enough long    to observer's motion). Wave number that    stays in this fixed A is also fixed. Therefore,    any uniform motion(Parallel to light path) of instrument(its length is also fixed as a part of fixed A)    doesn't    cause any change of wave number    in this    instrument, I think(Number of railroad ties in photograph that is taken    from moving train may not be changed by    train's    speed).    If this    understanding is right,    in the formula "light speed = frequency    x wave length(inverse number of    wave number)", frequency and light speed both may change(to observer).

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>>7
The speed of light is constant in a vacuum. It changes like anything else does as it passes through things in air, water, glass, etc.