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Sound Volume in Decibel


Decibel is a logarithmic value, which is used for the sound pressure level. An increase of 20 dB means tenfold, 6 dB is doubling. Negative values are possible. Sound with 0 dB is theoretically audible at ideal conditions. This calculator computes the ratio of two decibel values.

ratio = 10(a-b)/20

first value (a): dB
second value (b): dB

The first value is times louder than the second.

Please enter both values, the ratio will be calculated.

Sound power is proportional to the square of the sound pressure. This produces the 2 in the formula above. For dezibel in other values, see dynamic range.





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