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23 June, 22:07

Two pure tones are sounded together. The drawing shows the pressure variations of the two sound waves, measured with respect to atmospheric pressure, where t1 = 0.0220 s and t2 = 0.0242 s. What is the beat frequency?

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  1. 23 June, 22:16
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    4.13Hz

    Explanation:

    f1 = 1/t1 = 1/0.022 = 45.45 Hz

    f2 = 1/t2 = 1/0.0242 = 41.32 Hz

    No. of beats

    = 45.45 - 41.32

    ~ 4.13Hz
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