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Decibels

the intensity...

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the intensity of sound of50 dB is

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Q. Intensity level of sound whose intensity is

10^{- 8} w m^{- 2}

Q. Assertion :A

80 d B

sound has twice the intensity of a

40 d B

sound. Reason: Loudness of a sound of a certain intensity I is defined as

L_{d B} = 10 {log}_{10} {\frac{I}{I}}_{o}

Q. The intensity level of two sounds are 100 dB and 50 dB. What is the ratio of their intensities?

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

Q. How many times more intense is 90 dB sound than 40 dB sound :

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