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Constructive/Deconstructive Sound Waves

  • Thread starter xregina12
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  • #1
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Sound waves, like light waves, can interfere w/ each other, giving max and min levels of sound. Suppose a listener standing directly between 2 loudspeakers hears the same tone being emitted from both. This listener observes that when one of the speakers is moved 0.16 m farther away, the perceived intensity of the tone decreases from a max to a min.
a) Calculate the wavelength of the sound.


I am unsure what to do with this problem. I know that sound waves can have constructive and destructive interference. I am assuming that the 0.16 m in shift has caused a destructive interference in the incoming sound waves. However, I am confused about how to calculate this. I'd appreciate any help!
 

Answers and Replies

  • #3
rl.bhat
Homework Helper
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When the destructive interference occurs, the path difference is half the wavelength.
 

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