What does dB equals to?
dB (decibel) is a logarithmic measure of the ratio of two power
values, for example, two signal strengths. This is often used for
power gain or power loss. For example, a loss of 10 dB means that
the signal degrades by a factor of 10, a loss of 20 dB means that
the signal degrades by a factor of 100, and a loss of 30 dB means
that the signal degrades by a factor of 1000.