Two sound waves of the same frequency and amplitude are moving half a wavelength out of phase with each other. What will be heard?
- Nothing.
- A chord.
- A pulse.
Explanation from PART66Online
Two waves of equal frequency and amplitude that are half a wavelength (180 degrees) out of phase are in complete destructive interference: every compression of one meets a rarefaction of the other, so they cancel and nothing is heard. This is the same principle that noise-cancelling systems exploit.
R
romeshkunder asked · 4 Sep 2013
how
Community Comments (1)
P
PART66Online
4 Sep 2013
They will cancel each other.
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