, one h = 2.74 m above the other. Exactly 8.00 meters to the right of the midpoint, a microphone rests at point O. Point O is equally distant from each loudspeaker.   The loudspeakers are driven by the same tone generator and vibrate in phase at 390 Hz. It is possible to create a condition of destructive interference at Point O by changing one or both of the path lengths (r1 and r2) between speaker and microphone. Suppose that

College Physics
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Chapter1: Introduction: The Nature Of Science And Physics
Section: Chapter Questions
Problem 23PE: If a marathon runner averages 9.5 mi/h, how long does it take him or her to run a 26.22-mi marathon?
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Two loudspeakers are mounted on a rack, one h = 2.74 m above the other. Exactly 8.00 meters to the right of the midpoint, a microphone rests at point O. Point O is equally distant from each loudspeaker.
 
The loudspeakers are driven by the same tone generator and vibrate in phase at 390 Hz.
It is possible to create a condition of destructive interference at Point O by changing one or both of the path lengths (r1 and r2) between speaker and microphone. Suppose that this is done by raising the upper speaker while leaving the lower speaker in place. What is the smallest vertical distance (in m) that you would need to raise the upper speaker by, in order to create destructive interference at Point O? (The speed of sound waves in air is 343 m/s.)
h
1
8.00 m
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Transcribed Image Text:h 1 8.00 m ܕܐ
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