An observer walks at 1.5 m/s directly toward a loudspeaker and directly away from an…

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

An observer walks at 1.5 m/s directly toward a loudspeaker and directly away from an identical loudspeaker that is 20 m behind her. Both loudspeakers emit a tone of 440 Hz. The speed of sound is 340 m/s. Calculate the beat frequency the observer hears.

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