A microphone is placed at the node of a standing sound wave.What does the microphone pick up?
A)A constant and very high intensity sound.
B)A constant and very low intensity sound.
C)A varying high intensity sound.
D)A varying low intensity sound.
E)Unable to tell.

Question

Quizplus · Accepted Answer

At the node of a standing sound wave, the displacement of the medium (air, in this case) is minimal because a node is a point along the wave where the wave has minimal amplitude. Since sound intensity is related to the amplitude of the sound wave, a microphone placed at a node would pick up a very low intensity sound, and it would be constant because the condition at the node does not change over time as long as the standing wave pattern is maintained.

A Microphone Is Placed at the Node of a Standing