Intensity of sound in normal conservation is

10-20 dB

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30-60 dB

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70-99 dB

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120-150 dB

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Solution

The correct option is B
30-60 dB

The human ear offers a fixed area (the ear drum) for detection of sounds in the environment. Intensity is the amount of energy transmitted per second over an area of a square meter. The weakest audible sound is roughly 0 dB and a whispered voice is 1000 times more intense or 30 dB higher. The intensity of sound in normal conversation is 30-60 dB.

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