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8 May, 04:30

The threshold of hearing is defined as the minimum discernible intensity of the sound. It is approximately 10âˆ'12w/m2. Find the distance d from the car at which the sound from the stereo can still be discerned. Assume that the windows are rolled down and that each speaker actually produces 0.06 w of sound

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  1. 8 May, 06:42
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    The distance d from the car at which the sound from the stereo can still be discerned = 97720.5 m

    Explanation:

    Sound intensity heard at distance is related to the distance with the relation = (power of sound at the source) / (surface area of the wall of an imaginary sphere at the distance in question)

    I = P/4πd²

    Assuming the car has 2 speakers,

    P = 0.06 W * 2 = 0.12 W

    d = ?

    For the intensity of the least discernible sound,

    I = 10⁻¹² W/m²

    10⁻¹² = 0.12/4πd²

    d = 97720.5 m
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