Doppler Effect: Speed Relative to Ground, Source, or Listener?

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SUMMARY

The Doppler Effect formula requires understanding that the speeds of both the listener (VL) and the source (Vs) are relative to the medium through which sound travels, specifically the air. In stationary air conditions, where there is no wind, the velocities are effectively measured against the ground. Therefore, for accurate calculations, one must consider the air as the reference point rather than the ground or the objects themselves.

PREREQUISITES
  • Understanding of the Doppler Effect principles
  • Familiarity with sound wave propagation
  • Basic knowledge of relative motion concepts
  • Ability to apply formulas in physics
NEXT STEPS
  • Study the mathematical derivation of the Doppler Effect formula
  • Explore examples of the Doppler Effect in real-world scenarios
  • Learn about sound wave behavior in different mediums
  • Investigate the impact of wind on sound propagation
USEFUL FOR

Physics students, educators, and anyone interested in acoustics or wave phenomena will benefit from this discussion.

Bassel
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hi i just want to ask about the formula of Doppler Effect . The speeds of the listener VL and the source Vs are relative to the ground, source, or listener ?
 
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Bassel said:
hi i just want to ask about the formula of Doppler Effect . The speeds of the listener VL and the source Vs are relative to the ground, source, or listener ?
If the air is stationary relative to the ground (no wind to worry about), then the speeds of the listener and source will be relative to the ground.
 
Neither. It is relative to the air.
 

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