dB = 10 log P for power dB = 20 log V for voltage Power ratio = 10^(dB/10) Voltage ratio = 10^(dB/20) power voltage 0.1 dB 1.02 1.01 0.2 dB 1.05 1.02 0.5 dB 1.12 1.05 1 dB 1.26 1.12 2 dB 1.54 1.26 3 dB 2.0 1.41 4 dB 2.51 1.58 6 dB 4.0 2.0 8 dB 6.31 2.51 10 dB 10 3.16 20 dB 100 10 30 dB 1000 31.6 40 dB 10k 100 50 dB 100k 316 60 dB 1M 1000 70 dB 10M 3160 80 dB 100M 10k etc. |
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