Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 21 - Think and Discuss: 72

Answer

See below.

Work Step by Step

The sound in TV commercials is shifted to or concentrated at frequencies to which the human ear is most attuned. The overall sound intensity over all frequencies meets regulations, but TV commercials that target where our ears are most sensitive will sound louder than, say, white noise with the same overall sound intensity.
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