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Normal conversations is of 160 dB....

Normal conversations is of 160 dB.

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Assertion : Inhabitants close to busy airports are likely to experience helth hazards. Reason : Sound levels of jet aeroplanes usually excessd 160 dB.

A person speaking normally produces a sound intensity of 40 dB at a distance of 1 m . If the threshold intensity for reasonable audibility is 20 dB , the maximum distance at which he can be heard cleary is.

A person speaking normally produces a sound intensity of 40 dB at a distance of 1 m . If the threshold intensity for reasonable audibility is 20 dB , the maximum distance at which he can be heard cleary is.