When two sounds are in the ratio of 10:1 the sounds are said to be differ by 10db and if they are in the ratio of 1000:1 the sounds differ by
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The factor of 10 multiplying the logarithm makes it decibels instead of Bels, and is included because about 1 decibel is the just noticeable difference (JND) in sound intensity for the normal human ear. Decibels provide a relative measure of sound intensity
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