Two speakers in a stereo emit identical pure tones.As you move around in front of the speakers,you hear the sound alternating between loud and zero.This occurs because of
A)interference.
B)changing sound level.
C)diffraction.
D)the Doppler effect.
E)shock waves.

Question

Quizplus · Accepted Answer

This is known as constructive and destructive interference. When the two waves meet in phase, they add up to produce a louder sound, but when they meet out of phase, they cancel each other out producing silence.

Two Speakers in a Stereo Emit Identical Pure Tones