Conceptual Physics (12th Edition)

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

Chapter 19 - Think and Explain: 80

Answer

The Doppler effect refers to changes in frequency. The speed of the wave in the medium is something else entirely. It remains constant; it is independent of whether the source or listener is moving.
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