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Question

Match the following sounds with their suitable decibels.

A
140 dB
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B
10 dB
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C
70 dB
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D
30 dB
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Solution

Loudness of a sound depends on its intensity. Intensity is a measurable quantity while loudness is a sensation.
The normal whisper of a human being can produce a loudness of 10 dB.
The jet engines can produce a loudness of about 140 dB.
The traffic can produce a loudness of 70 dB.
The average human breathing can produce a loudness of 30 dB.

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