Answer
(b) Harmonics
Work Step by Step
Equal loudness curves has frequency on the x-axis. Hence, it varies with sound harmonics.
Therefore, (b) is the answer.
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 14 - Sound - Learning Path Questions and Exercises - Multiple Choice Questions - Page 522: 16
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