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What is the beat frequency heard by the observer

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-A train in a station sounds its whistle at a frequency 494 Hz while moving away from a stationary observer at 3 m/s. A stationary sounds its 494 Hz whistle at the same time. What is the beat frequency heard by the observer, assuming speed sound of 343 m/s ?

-A person is standing 1.0 m from a sound source that measures an intensity of 120 dB. What is the sound intensity at 10.0 m and 100.0 m from the source?

Reference no: EM132536007

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