The three identical loudspeakers in FIGURE P17.71 play a 170 Hz tone in a room where the speed of sound is 340 m/s. You are standing 4.0 m in front of the middle speaker. At this point, the amplitude of the wave from each speaker is a.

a. What is the amplitude at this point?b. How far must speaker 2 be moved to the left to produce a maximum amplitude at the point where you are standing?c. When the amplitude is maximum, by what factor is the sound intensity greater than the sound intensity from a single speaker??

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3.0 m 3.0 m 4.0 m FIGURE P17.71