Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition)
4th Edition
ISBN: 9780133953145
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Chapter 17, Problem 69EAP
Two loudspeakers in a plane, 5.0 m apart, are playing the same frequency. If you stand 12.0 m in front of the Plane of the speakers centered between them, you hear a sound of maximum intensity. As you walk parallel to the plane of the speakers, staying 12.0 m in front of them, you first hear a minimum of sound intensity when you are directly in front of one of the speakers. What is the frequency of the sound? Assume a sound speed of 340 m/s.
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Two loudspeakers in a plane, 6.0 m apart, are
playing the same frequency. If you stand 11.0 m in
front of the plane of the speakers, centered between
them, you hear a sound of maximum intensity. As
you walk parallel to the plane of the speakers,
staying 11.0 m in front of them, you first hear a
minimum of sound intensity when you are directly in
front of one of the speakers.
What is the frequency of the sound? Assume a sound speed of 340 m/s.
Express your answer in hertz.
17 ΑΣΦ
f =
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Two speakers (A and B) lie on the y-axis, 4.0m apart. They emit exactly the same 280 Hz tone in phase with each other. You start right at speaker A and walk in the x-direction. How far from speaker A do you first hear a minimum in sound intensity? Assume the speed of sound in this room is 340 m/s.
Two compact sources of sound near each other produce in-phase sine waves at
each source. One source is positioned at a distance x, =12.00 m from a microphone
2.
and the other source is positioned at a distance of x, =13.40 m from the same
microphone. The amplitude of the sound at the microphone from each source by itself
is s = 0.0350µm. The plane waves come from essentially the same direction so there
will be interference.
a. If the frequency emitted by the two sources is f = 425.0Hz and the speed of
sound is v= 340.0m/ s, what is the phase difference, 8, in radians, due to the
path length differences to the microphone?
b. When both sources are on, interference changes the total amplitude to
s, = 2s, cos(8/2). What is the total amplitude for the phase difference found in
part 'a.’?
Chapter 17 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (Chs 1-42) Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition)
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