Twin engine jet airplane lands

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SUMMARY

The discussion centers on calculating the beat frequency of sounds produced by twin engine jet airplanes. The average frequency heard is 4100 Hz, and the difference between the individual frequencies of each engine and this average needs to be determined. The concept of beat frequency is highlighted, indicating that it arises from two sound sources with slightly different frequencies. Participants suggest referring to the "beat frequency" section of a relevant textbook for the formula needed to solve the problem.

PREREQUISITES
  • Understanding of beat frequency in acoustics
  • Basic knowledge of sound wave frequencies
  • Familiarity with frequency calculations
  • Access to relevant textbooks on acoustics
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  • Review the "beat frequency" section in acoustics textbooks
  • Learn about sound wave interference and its effects
  • Explore frequency modulation techniques in audio engineering
  • Investigate real-world applications of beat frequency in aviation
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Aerospace engineers, acoustics students, audio engineers, and anyone interested in the physics of sound and its applications in aviation.

confused1
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Finally, your friend's twin engine jet airplane lands. As it stands on the runway, you hear the sound of the engines getting louder and softer, rhythmically once every two seconds. The average frequency you hear is 4100 Hz. What is the difference between the individual frequencies of the sounds from each engine and this average?

f_low-f_ave =

f_high-f_ave =
 
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Sorry, man; I have absolutely no idea about this. I just can't stand to see a post go unanswered. It seems rude, as if you're being ignored. I wish I could help, but maybe by posting at all and moving this up in the line, I can prompt someone else to get involved. :smile:
 
THis is apparently a quaestion regarding the "beat frequency" of two close-but-not-exactly-the-same sources. The formula associated with this is so simple that it usually is not included with most formula lists. Look at the "beat frequency" section of the textbook.
 

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