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Noise is undersirable low level of sound...

Noise is undersirable low level of sound .

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Undesired high level of sound is called

Which one of the following is the permissible level of noise in a silent zone at daytime?

Stringent following of laws laid down relation to noise need to be enforced to protect ourselves from noise pollution. These laws are a. Delimitation of horn-free zones around hospitals and schools b. Permissible sound-levels of crackers c. Permissible sound-levels of loudspeakers d. Timing after which loudspeaker cannot be played

Assertion : Sound level increases linearly with intensity of sound. Reason : If intensity of sound is doubled, sound level increases approximatel 3 dB .