Two speakers that are 10 m apart produce in-phase sound waves of frequency 170 H

Question

Two speakers that are 10 m apart produce in-phase sound waves of frequency 170 Hz in a room where the speed of sound is 340 m/s. A microphone is placed midway between the speakers. A.) What is the wavelength of the sound waves? B.) Does the microphone detect a minimum or a maximum sound intensity at the midpoint? C.) What does it detect if it is moved 1 m to the left of the midpoint? Two speakers that are 10 m apart produce in-phase sound waves of frequency 170 Hz in a room where the speed of sound is 340 m/s. A microphone is placed midway between the speakers. A.) What is the wavelength of the sound waves? B.) Does the microphone detect a minimum or a maximum sound intensity at the midpoint? C.) What does it detect if it is moved 1 m to the left of the midpoint? A.) What is the wavelength of the sound waves? B.) Does the microphone detect a minimum or a maximum sound intensity at the midpoint? C.) What does it detect if it is moved 1 m to the left of the midpoint?

Explanation / Answer

a) lambda = v / f = 340 / 170

wavelength = 2.0 m

b) microphone detect maximum sound intensity

c) pathe difference = 1m * 2 = 2.0

maximum sound intensity

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