LOGARITHMIC VOLTAGE RATIOS
BY: FRANK McCLATCHIE
dB
RATIO
dB
RATIO
dB
RATIO
dB
RATIO
6
=
1.995263
5
=
1.778279
4
=
1.584932
3
=
1.412538
2
=
1.258925
1
=
1.122019
0
=
1.000000
-20
=
0.10000
-40
=
0.01000
-60
=
0.00100
-1
=
0.891250
-21
=
0.08913
-41
=
0.00891
-61
=
0.00089
-2
=
0.794330
-22
=
0.07943
-42
=
0.00794
-62
=
0.00079
-3
=
0.707490
-23
=
0.07075
-43
=
0.00707
-63
=
0.00071
-4
=
0.630960
-24
=
0.06310
-44
=
0.00631
-64
=
0.00063
-5
=
0.562340
-25
=
0.05623
-45
=
0.00562
-65
=
0.00056
-6
=
0.501190
-26
=
0.05012
-46
=
0.00501
-66
=
0.00050
-7
=
0.446680
-27
=
0.04467
-47
=
0.00447
-67
=
0.00045
-8
=
0.398110
-28
=
0.03981
-48
=
0.00398
-68
=
0.00040
-9
=
0.354800
-29
=
0.03548
-49
=
0.00355
-69
=
0.00035
-10
=
0.316230
-30
=
0.03162
-50
=
0.00316
-70
=
0.00032
-11
=
0.281840
-31
=
0.02818
-51
=
0.00282
-71
=
0.00028
-12
=
0.251190
-32
=
0.02512
-52
=
0.00251
-72
=
0.00025
-13
=
0.223870
-33
=
0.02239
-53
=
0.00224
-73
=
0.00022
-14
=
0.199550
-34
=
0.01996
-54
=
0.00200
-74
=
0.00020
-15
=
0.177830
-35
=
0.01778
-55
=
0.00178
-75
=
0.00018
-16
=
0.158490
-36
=
0.01585
-56
=
0.00158
-76
=
0.00016
-17
=
0.141250
-37
=
0.01413
-57
=
0.00141
-77
=
0.00014
-18
=
0.125890
-38
=
0.01259
-58
=
0.00126
-78
=
0.00013
-19
=
0.112200
-39
=
0.01122
-59
=
0.00112
-79
=
0.00011
-20
=
0.100000
-40
=
0.01000
-60
=
0.00100
-80
=
0.00010
MULTIPLY OR DIVIDE THESE NUMBERS BY ANY FACTOR THAT ZERO dB IS SUPPOSED TO REPRESENT
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