Decibel
dB
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Definition:
A unit for measuring sound or power ratios. As originally developed, the gain or loss of power expressed in decibels was 10 times the logarithm of the power ratio. The numerical value of one decibel is approximately equal to the smallest change in volume of sound that the normal ear can detect. The scale of decibels is logarithmic, every increase of 10 dB representing an increase of about 300% in sound.
Definition Copyright ©1989 CRC Press LLC. All rights
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