Question two identical loudspeakers that are 500 m apart, Ask an Expert

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Question: Two identical loudspeakers that are 5.00 m apart and face toward each other are driven in phase by the same oscillator at a frequency of 875 Hz. The speed of sound in the room is 344 m/s.

Part A: If you start out standing midway between the speakers, find the shortest distance you can walk toward either speaker in order to hear a minimum of sound.

I need help to find the shortest distance you can walk toward either speaker.

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