DECIBELS, dBu etc.
dBu Voltage dBu Voltage

NOTES

  • The table shows the voltage equivlent to a given level in dBu from +40 dBu to -40 dBu
  • dBu is a logrithmic voltage notation relative to 0.7746 Volts but not related to any impedance.
  • dBm (the traditional unit 50 years ago) is relative to 1 mW into 600 ohms and is numerically equal to dBu.
  • dBV (rarely used) is relative to 1.0 Volts and like dBu, is not related to any impedance.
  • Information at  Canford Audio
  • Comments and questions to support@sowter.co.uk

 

OTHER USEFUL INFORMATION

  • To convert max level at 50 Hz to 20 Hz subtract 7.96 dB
  • To convert an rms voltage to a peak voltage multiply by 1.414
  • To convert an rms voltage to a p-p voltage multiply by 2.828

 

0 0.7746 0 0.7746
1 0.8691 -1 0.6904
2 0.9752 -2 0.6153
3 1.0941 -3 0.5484
4 1.2277 -4 0.4887
5 1.3774 -5 0.4356
6 1.5455 -6 0.3882
7 1.7341 -7 0.3460
8 1.9457 -8 0.3084
9 2.1831 -9 0.2748
10 2.4495 -10 0.2449
11 2.7484 -11 0.2183
12 3.0837 -12 0.1946
13 3.4600 -13 0.1734
14 3.8822 -14 0.1546
15 4.3559 -15 0.1377
16 4.8874 -16 0.1228
17 5.4837 -17 0.1094
18 6.1528 -18 0.0975
19 6.9036 -19 0.0869
20 7.7460 -20 0.0775
21 8.6911 -21 0.0690
22 9.7516 -22 0.0615
23 10.9415 -23 0.0548
24 12.2765 -24 0.0489
25 13.7745 -25 0.0436
26 15.4552 -26 0.0388
27 17.3411 -27 0.0346
28 19.4570 -28 0.0308
29 21.8311 -29 0.0275
30 24.4949 -30 0.0245
31 27.4837 -31 0.0218
32 30.8372 -32 0.0195
33 34.6000 -33 0.0173
34 38.8218 -34 0.0155
35 43.5588 -35 0.0138
36 48.8737 -36 0.0123
37 54.8372 -37 0.0109
38 61.5284 -38 0.0098
39 69.0360 -39 0.0087
40 77.4597 -40 0.0077
E A Sowter Ltd. The Boatyard,
Cullingham Road
IPSWICH IP1 2EG England		 Tel: +44(0)1473 252794
Fax: +44(0)1473 236188
E-Mail sales@sowter.co.uk