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https://texercises.com/exercise/asymmetry-in-doppler-effect/
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Exercise:
A sound source emits sound waves with a frequency fO. Calculate the frequency heard by an observer when abcliste abc the sound source is moving towards the observer at vO. abc the observer is moving towards the sound source at vO. abc both the sound source and the observer are moving towards each other at vhP. abcliste

Solution:
abcliste abc f_a faF ftimesfracvsvs-v fa approx resultfaP abc f_b fbF ftimesfracvs+vvs fb approx resultfbP abc f_c fcF ftimesfracvs+vhPvs-vhP fc approx resultfcP abcliste As can be seen in this example for the acoustic Doppler effect the motion relative to the carrier medium in this case air is relevant not the relative motion between emitter and receiver. This is different for the optical Doppler effect.
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Exercise:
A sound source emits sound waves with a frequency fO. Calculate the frequency heard by an observer when abcliste abc the sound source is moving towards the observer at vO. abc the observer is moving towards the sound source at vO. abc both the sound source and the observer are moving towards each other at vhP. abcliste

Solution:
abcliste abc f_a faF ftimesfracvsvs-v fa approx resultfaP abc f_b fbF ftimesfracvs+vvs fb approx resultfbP abc f_c fcF ftimesfracvs+vhPvs-vhP fc approx resultfcP abcliste As can be seen in this example for the acoustic Doppler effect the motion relative to the carrier medium in this case air is relevant not the relative motion between emitter and receiver. This is different for the optical Doppler effect.
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Attributes & Decorations
Branches
Doppler Effect
Tags
moving emitter, moving observer, sound wave
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Difficulty
(1, default)
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Language
ENG (English)
Type
Calculative / Quantity
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