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If the intensity of sound is doubled, by...

If the intensity of sound is doubled, by how many decibels does the sound level increase ?

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The correct Answer is:
3.01 dB
Loudness level `DeltaL` (in dB) = `10"log"(I_(2))/(I_(1))`
`I_(2) = 2I_(1)` we use
`Delta` (in dB) = `10log(2)`
= `10 xx 0.301` = 3.01dB
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Knowledge Check

  • Intensity of sound wave is

    A
    equal to product of energy density and wave velocity
    B
    proportional to the square of the frequency
    C
    proportional to the wave velocity
    D
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    12 dB
    B
    14.77 dB
    C
    10dB
    D
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  • Intensity of sound depends upon

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    frequency
    B
    velocity
    C
    amplitude
    D
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