A siren emitting a sound of frequency 1000 Hz moves away from you toward the face of
Question:
A siren emitting a sound of frequency 1000 Hz moves away from you toward the face of a cliff at a speed of 10 m/s. Take the speed of sound in air as 330 m/s.
(a) What is the frequency of the sound you hear coming directly from the siren?
(b) What is the frequency of the sound you hear reflected off the cliff?
(c) What is the beat frequency between the two sounds? Is it perceptible (less than 20 Hz)?
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Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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