Sound Pressure in Partial Vacuum

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SUMMARY

The discussion centers on the relationship between sound pressure and ambient pressure in a controlled environment. It highlights that sound pressure from a constant source is influenced by changes in ambient pressure, particularly in a vacuum setting. The experiment involves using a microphone to measure sound pressure variations as ambient pressure is altered, with temperature remaining constant. The reference to the Wikipedia article on the speed of sound provides foundational knowledge for understanding these dynamics.

PREREQUISITES
  • Understanding of sound pressure levels and measurement techniques
  • Familiarity with the principles of acoustics
  • Knowledge of gas laws and their impact on sound propagation
  • Experience with experimental setups in controlled environments
NEXT STEPS
  • Research the effects of ambient pressure on sound speed using the ideal gas law
  • Explore acoustic measurement techniques for varying pressure conditions
  • Study the relationship between temperature and sound propagation in gases
  • Investigate sound pressure level (SPL) calculations in different atmospheric conditions
USEFUL FOR

Acoustic engineers, physicists, and researchers conducting experiments on sound behavior in varying pressure environments will benefit from this discussion.

Yoni V
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Is there a good description or formula regarding how the sound pressure from a constant source depends upon ambient pressure?
That is, if I were to conduct an experiment where I put a source and a microphone in a container, and then change the pressure in that container with a pump, assuming that the temperature remains relatively constant, how will the microphone react to the change in pressure? Thanks
 
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