The defining equation for decibels is
A = 10*log10(P2/P1) (dB)where P1 is the power being measured, and P1 is the reference to which P2 is being compared.
To convert from
The defining equation for decibels is
A = 10*log10(P2/P1) (dB)where P1 is the power being measured, and P1 is the reference to which P2 is being compared.
To convert from decibel measure back to power ratio:
P2/P1 = 10^(A/10)
Voltage is more easily measured than power, making it generally more convenient to use:
A = 20*log10(V2/V1) (Z2 == Z1)The equation for obtaining voltage ratio from dB is