Two In-Phase Loudspeakers Are Some Distance Apart

question 120

Multiple Choice

Two in-phase loudspeakers are some distance apart.They emit sound with a frequency of 536 Hz.A microphone is moved between the speakers along the line joining the two speakers with a constant speed of 1.60 m/s.What beat frequency is observed? The speed of sound in air is 343 m/s.

• A)5.00 Hz
• B)6.00 Hz
• C)7.00 Hz
• D)8.00 Hz
• E)9.00 Hz

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