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14 June, 08:02

L = loudness, in decibels (dB); I = sound intensity, in watts/m2; I0 = 10-12 watts/m2

The loudness of a jack hammer is 96 dB. Its sound intensity is about 0.004.

The loudness of a compactor is 94 dB. Its sound intensity is about 0.0025.

The sound intensity of the jack hammer is about 1.6 times the sound intensity of the compactor.

The loudness of a pile driver is 112 dB. About how many times the sound intensity of the jackhammer is the sound intensity of a pile driver? Round to the nearest ten.

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  1. 14 June, 09:00
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    The sound intensity of the Pile Driver is 39.5

    or nearly 40 times the sound intensity of the jackhammer.

    Given with Loudness in dB for pile driver = 112 dB

    We have to convert it in terms of sound intensity.

    First,

    112dB/10 = 11.2

    Then we'll use this as exponent of 10

    (10) ^ (11.2) = 1.5849 * 10 ^ 11

    Then use the equation of Watts per square meter to find the intensity:

    I / (10^-12 W/m^2) = 1.5849 * 10 ^ 11

    I = sound intensity = 0.158

    Then compare:

    Sound intensity of Pile Driver / Sound intensity of Jackhammer

    (0.158) / (0.004)

    = 39.5

    or nearly 40 times the jackhammer.
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