*デシベル換算表*
dB
Power Ratio
Current Ratio
dB
Power Ratio
Current Ratio
Gain
Loss
Gain
Loss
Gain
Loss
Gain
Loss
0.1
1.023
0.977
1.015
0.990
6.0
3.98
0.251
1.995
0.501
0.2
1.047
0.955
1.023
0.977
6.1
4.07
0.246
2.009
0.496
0.3
1.072
0.933
1.035
0.967
6.2
4.17
0.240
2.04
0.490
0.4
1.096
0.912
1.047
0.955
6.3
4.27
0.234
2.06
0.485
0.5
1.122
0.891
1.059
0.945
6.4
4.37
0.229
2.09
0.479
0.6
1.148
0.871
1.072
0.933
6.5
4.47
0.224
2.11
0.474
0.7
1.175
0.854
1.083
0.924
6.6
4.57
0.219
2.14
0.468
0.8
1.202
0.832
1.096
0.912
6.7
4.68
0.214
2.16
0.463
0.9
1.230
0.813
1.109
0.903
6.8
4.79
0.209
2.19
0.457
1.0
1.259
0.794
1.122
0.891
6.9
4.90
0.204
2.21
0.452
1.1
1.288
0.776
1.134
0.882
7.0
5.01
0.200
2.24
0.447
1.2
1.318
0.759
1.148
0.871
7.1
5.13
0.195
2.26
0.442
1.3
1.349
0.741
1.160
0.862
7.2
5.25
0.191
2.29
0.437
1.4
1.380
0.724
1.175
0.851
7.3
5.37
0.186
2.32
0.432
1.5
1.413
0.708
1.188
0.843
7.4
5.50
0.182
2.34
0.427
1.6
1.445
0.692
1.202
0.832
7.5
5.62
0.178
2.37
0.422
1.7
1.479
0.676
1.215
0.823
7.6
5.75
0.174
2.40
0.417
1.8
1.514
0.661
1.230
0.813
7.7
5.89
0.170
2.42
0.412
1.9
1.549
0.645
1.243
0.805
7.8
6.03
0.166
2.45
0.407
2.0
1.585
0.631
1.259
0.794
7.9
6.17
0.162
2.48
0.403
2.1
1.622
0.617
1.272
0.786
8.0
6.31
0.159
2.51
0.398
2.2
1.660
0.603
1.288
0.776
8.1
6.46
0.155
2.54
0.394
2.3
1.698
0.589
1.302
0.768
8.2
6.61
0.151
2.57
0.388
2.4
1.738
0.575
1.318
0.755
8.3
6.67
0.148
2.60
0.385
2.5
1.778
0.562
1.331
0.751
8.4
6.92
0.145
2.63
0.380
2.6
1.820
0.550
1.349
0.741
8.5
7.08
0.141
2.06
0.376
2.7
1.862
0.537
1.363
0.734
8.6
7.24
0.138
2.69
0.372
2.8
1.905
0.525
1.380
0.724
8.7
7.41
0.135
2.72
0.368
2.9
1.950
0.513
1.395
0.717
8.8
7.59
0.132
2.75
0.363
3.0
1.995
0.501
1.413
0.708
8.9
7.76
0.129
2.78
0.359
3.1
2.04
0.490
1.428
0.701
9.0
7.94
0.126
2.82
0.355
3.2
2.09
0.479
1.445
0.692
9.1
8.13
0.123
2.85
0.351
3.3
2.14
0.468
1.462
0.685
9.2
8.32
0.120
2.88
0.347
3.4
2.19
0.457
1.479
0.676
9.3
8.51
0.118
2.91
0.343
3.5
2.24
0.447
1.493
0.670
9.4
8.71
0.115
2.95
0.339
3.6
2.29
0.437
1.514
0.661
9.5
8.91
0.112
2.98
0.335
3.7
2.34
0.427
1.525
0.654
9.6
9.12
0.110
3.02
0.331
3.8
2.40
0.417
1.543
0.645
9.7
9.33
0.107
3.05
0.328
3.9
2.46
0.407
1.564
0.640
9.8
9.55
0.105
3.09
0.324
4.0
2.51
0.398
1.585
0.631
9.9
9.77
0.102
3.12
0.320
4.1
2.57
0.389
1.600
0.625
10.0
10.0
0.100
3.16
0.316
4.2
2.63
0.380
1.622
0.617
11.0
12.6
0.0794
3.55
0.282
4.3
2.69
0.372
1.640
0.610
12.0
15.9
0.063
3.98
0.251
4.4
2.75
0.363
1.660
0.603
13.0
20.0
0.0501
4.47
0.224
4.5
2.82
0.355
1.677
0.597
14.0
25.1
0.0398
5.01
0.200
4.6
2.88
0.347
1.698
0.589
15.0
31.6
0.0316
5.62
0.176
4.7
2.95
0.339
1.716
0.583
16.0
39.8
0.0251
6.31
0.158
4.8
3.02
0.331
1.738
0.575
17.0
50.1
0.0200
7.08
0.142
4.9
3.09
0.324
1.755
0.570
18.0
63.1
0.0159
7.94
0.126
5.0
3.16
0.316
1.778
0.562
19.0
79.4
0.0126
8.91
0.112
5.1
3.24
0.309
1.798
0.556
20.0
100.
0.01
10.00
0.100
5.2
3.31
0.302
1.820
0.550
25.0
316.
0.00316
17.80
0.0562
5.3
3.39
0.295
1.840
0.544
30.0
1000.
0.001
31.6
0.0316
5.4
3.47
0.288
1.862
0.537
35.0
3160.
0.000316
56.2
0.0178
5.5
3.55
0.282
1.883
0.531
40.0
10000.
0.0001
100.
0.0100
5.6
3.63
0.275
1.906
0.525
45.0
31600.
0.000031
178.0
.00562
5.7
3.72
0.269
1.926
0.519
50.0
100000.
0.00001
316.
.00316
5.8
3.80
0.263
1.950
0.513
55.0
316000.
.000003
562.
.00178
5.9
3.89
0.257
1.970
0.507
60.0
1000000.
.000001
1000.
.00100