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12 September, 01:58

A brand of earplugs reduces the sound intensity level by 27 dB. By what factor do these earplugs reduce the acoustic intensity?

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  1. 12 September, 02:14
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    27dB = 2.7 B

    So I / I₀ = 10⁻²°⁷, I₀ is intensity of main sound and I is intensity after reduction.

    = 1.99 X 10⁻³

    So intensity will reduce by 1.99 X 10⁻³.
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