Speed of Sound Wave: Car Moving 50m/s

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SUMMARY

The speed of sound in air remains constant at 340 m/s regardless of the motion of the source, such as a car moving towards a person at 50 m/s. However, the frequency of the sound emitted by the car's horn experiences a Doppler shift, resulting in a higher perceived frequency for the observer. This phenomenon illustrates the principles of sound wave propagation and the Doppler effect in physics.

PREREQUISITES
  • Understanding of sound wave propagation
  • Basic knowledge of the Doppler effect
  • Familiarity with relative motion concepts
  • Knowledge of speed measurements in physics
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  • Research the mathematical formulation of the Doppler effect
  • Explore sound wave properties in different mediums
  • Study the implications of relative motion on wave frequency
  • Investigate real-world applications of the Doppler effect in technology
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Physics students, educators, audio engineers, and anyone interested in the principles of sound and wave mechanics.

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For a sound wave: A car is moving towards a person at 50m/s and toots its horn. Let's say the speed of sound relative to the air is 340m/s. Does the person measure the speed of the sound to be 390m/s or does it remain at 340m/s?
 
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Stilll 340 m/s, but the frequency of the horn will be Doppler shifted up.
 
olivermsun said:
Stilll 340 m/s, but the frequency of the horn will be Doppler shifted up.

Excellent, thanks for the help.
 

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