Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 12 - Sound - Misconceptual Questions: 11

Answer

Choice C.

Work Step by Step

The sound waves from the two speakers interfere with each other, as predicted by the principle of superposition. The path lengths to each speaker differ for listeners at different locations scattered around the room. At some locations, the path difference will be an odd number of half wavelengths, and the received waves will destructively interfere, producing a dead spot. At other locations, the path difference will be zero or an integer number of whole wavelengths, and the received waves will constructively interfere, making that a loud spot in the room.
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