Two In-Phase Loudspeakers Are Placed Along a Wall and Are

question 49

Multiple Choice

Two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m.They emit sound with a frequency of 514 Hz.A person is standing away from the wall,in front of one of the loudspeakers.What is the closest nonzero distance from the wall the person can stand and hear constructive interference? The speed of sound in air is 343 m/s.

• A)0.34 m
• B)0.73 m
• C)1.2 m
• D)1.6 m

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Definitions:

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An American engineer and industrialist who designed and manufactured the Pullman sleeping car and founded a company town for his workers, contributing to the development of labor relations in the United States.

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