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Unformatted text preview: th the same amplitude, frequency f = 600 Hz, and phase. Speaker B is a distance L to
the right of A. Consider a point Q a distance Δx to the right of the speakers and along the
line connecting them. (a) Write an expression for the sound displacement amplitude s(x,t) at point Q in terms of the
displacement amplitudes produced by each speaker, L and Δx. Assume that the
amplitudes of the waves produced by each speaker remain constant as they propagate
(not true, but ok for a first approximation.)
(b) For what values of L will the waves from speakers A and B interfere destructively to
produce a minimum amplitude at point P? (The resulting wave amplitude at P will be 0 for
(c) For what values of L will the waves interfere constructively to produce a maximum
amplitude at point P?
(d) Interference effects like those in (a-c) are almost never a factor when listening to home
stereo equipment. Why not? (Hint: do you listen to a single note?)
Questions, Exercises and Problems from Y&F 12th Ed. for study and review:
(Do not turn these in.)
Volume 1, Chapter 15:
Exercises 27, 28, 29, 30, 31, 32
Volume 1, Chapter 16:
Exercises 22, 34, 36, 39, 40
Physics 2214, Spring 2012 4 Cornell University...
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This note was uploaded on 02/27/2013 for the course PHY 2214 taught by Professor Davis during the Spring '12 term at Cornell University (Engineering School).
- Spring '12