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27 April, 00:07

The sound level produced by one singer is 71.4 dB. What would be the sound level produced by a chorus of 36 such singers (all singing at the same intensity at approximately the same distance as the original singer)

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  1. 27 April, 00:24
    0
    The sound level produced by a chorus of 36 singers will be 86.96 dB.

    Explanation:

    Let I, the intensity of a sound produced by a singer, therefore, the intensity of the sound produced by 36 singers is equal to 36I. Therefore, the intensity is:

    x = 10log (36I/Io)

    x = 10log (36) + 10log (I/Io)

    The second term in the equation is the sound intensity produced by a single singer. We calculate that the sound intensity of 36:

    x = 10log (36) + 71.4 = 86.96 dB
  2. 27 April, 00:31
    0
    Answer: The sound level of the singers is

    86.96dB

    Explanation:

    sound wave can be described by the intensity of sound, which is measured in decibels. The actual intensity, in watts per square meter, varies over a very wide range, so the logarithmic scale is more convenient in intensity characterization. The intensity in decibels is given by 10log10 (I/Io)

    Where Io = 10^-12W/m^2 is called the threshold of hearing.

    If the intensity of sound produced by 1 singer is I the intensity of sound of 36 singers will be 36I

    X = 10log10 (36I / Io)

    Transforming, we have,

    X = 10log10 36 + 10log10 (I/Io)

    X = 10log10 36 + 71.4 fb

    X = 15.56 + 71.4 fb

    X = 86.96dB
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