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Unformatted text preview: a. What is the phase difference between the waves as they arrive at the listener? b. If each speaker separately would result in sound of intensity I at the listener, what intensity does the listener receive with both speakers active? c. As the frequency emitted by the speakers is increased, what is the Frst frequency for which the listener hears no sound? a. The wavelength is 340/170 = 2 m. The distance from the bottom speaker to the listener is 5 m (3-4-5 triangle) so the path difference is r = 2 m, which is the same as . The phase difference is therefore = 2 . b. This is constructive interference, so I = 4 I . c. Increasing f decreases and therefore increases . The next value for destructive interference is = 3 , so k r = 3 . This gives = 4/3 m and f = 255 Hz. listener 3 m 4 m Physics 53 Summer 2010 2...
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This note was uploaded on 10/19/2011 for the course PHYSICS 53L taught by Professor Mueller during the Spring '07 term at Duke.
- Spring '07