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
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.