How Does the Loudness Change When Two Jets Fly Together?

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SUMMARY

The discussion centers on the loudness perceived when two jet planes, each producing 130 dB of sound, fly together. It is established that sound intensity is measured on a logarithmic scale, meaning that when two identical sound sources are combined, the resulting dB level does not simply double. Instead, the intensity increases, leading to a calculated increase of approximately 3 dB, resulting in a total perceived loudness of about 133 dB. The concept of interference is acknowledged but deemed irrelevant due to insufficient parameters for a precise calculation.

PREREQUISITES
  • Understanding of decibel (dB) scale and sound intensity
  • Basic knowledge of sound wave interference
  • Familiarity with logarithmic scales in physics
  • Concept of sound pressure levels
NEXT STEPS
  • Research the principles of sound wave interference and its effects on loudness
  • Study the logarithmic nature of the decibel scale in acoustics
  • Explore calculations for combining sound levels from multiple sources
  • Investigate the threshold of pain in sound levels and its implications
USEFUL FOR

Acoustics engineers, sound designers, aviation professionals, and anyone interested in the physics of sound and its measurement.

kanha
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please reply me
i have a doubt. if two jet planes are flying together each producing 130 db sound. then what is the level of loudness heared by a person standing there. no other parameters are known. I have two concepts in mind ie) 1. every fundamental frequency produce hormonics and when two similar sin waves travel together they form a single sin wave. 120 db sound is threshold of pain.i don't know whether this concept is useful or some another concept is there please explan it.
thanks in advance
 
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two similar sin waves travel together they form a single sin wave

What you are talking about is interference. Due to lack of information you can't really use that in this problem.

Decibels is the logarithmic scale of intensity. If you put two planes together (ignoring interference) the intensity at any point will double. How will that affect the decibel reading?

Hint: The dB reading doesn't double.
 

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