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儀器技術(shù)文章 |
功率中dB（分貝）與Watts的換算關(guān)系
來源：東方嘉儀 www.94blog.com 點(diǎn)擊：
功率中dB（分貝）與Watts的換算關(guān)系
X(dB)=10lg[Y(mW)]
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以Watts計(jì)算dB
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以dB計(jì)算Watts
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dB
|
Watts
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|
dB
|
Watts
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|
dB
|
Watts
|
|
dB
|
Watts
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|
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0
|
1
|
mW
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25.99883
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398
|
mW
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0
|
1
|
mW
|
26
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398.1072
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mW
|
|
2.0412
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1.6
|
mW
|
27.99341
|
630
|
mW
|
2
|
1.584893
|
mW
|
28
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630.9573
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mW
|
|
3.9794
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2.5
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mW
|
30
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1
|
W
|
4
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2.511886
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mW
|
30
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1
|
W
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6.0206
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4
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mW
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32.00029
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1.585
|
W
|
6
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3.981072
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mW
|
32
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1.584893
|
W
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|
7.993405
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6.3
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mW
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34.0002
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2.512
|
W
|
8
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6.309573
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mW
|
34
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2.511886
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W
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10
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10
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mW
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36.0206
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4
|
W
|
10
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10
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mW
|
36
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3.981072
|
W
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12.0412
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16
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mW
|
37.78151
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6
|
W
|
12
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15.84893
|
mW
|
38
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6.309573
|
W
|
|
13.9794
|
25
|
mW
|
40
|
10
|
W
|
14
|
25.11886
|
mW
|
40
|
10
|
W
|
|
16.0206
|
40
|
mW
|
42.0412
|
16
|
W
|
16
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39.81072
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mW
|
42
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15.84893
|
W
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17.99341
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63
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mW
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43.9794
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25
|
W
|
18
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63.09573
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mW
|
44
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25.11886
|
W
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|
20
|
100
|
mW
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46.43453
|
44
|
W
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20
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100
|
mW
|
46
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39.81072
|
W
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|
21.98657
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158
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mW
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47.63428
|
58
|
W
|
22
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158.4893
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mW
|
48
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63.09573
|
W
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|
23.9794
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250
|
mW
|
50
|
100
|
W
|
24
|
251.1886
|
mW
|
50
|
100
|
W
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，
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