frequency does not equal sound pressure
incompatible units
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Decibels
20 to 50 decibels (dB).
Equally spaced subdivisions. However, a scale need not be divided into equal parts. For example, the logarithmic scale which, among other things, is used to measure the volume of sound - in decibels. The musical scale is approximately logarithmic.
2 = 2 is equal to 2.
To calculate the number of decibels that power-level-'A' is greater than power-level-'B',-- Divide 'A' by 'B'-- Take the 'log' of the quotient-- Multiply the 'log' by 10 .If the result is negative, then 'A' is that many decibels lower than 'B'.