Sound pressure levels

This table shows sound pressure levels in decibels and what this means in terms of intensity and power ratios.


Decibels
Intensity (or Power) Ratio
Pressure (or Current or Voltage) Ratio
Pressure Ratio as a Power of 10
Sound Pressure (mPa)
Nepers
0
1
1
0
0.02
0
10
10
3.16
0.5
0.06
1.15
20
100
10
1
0.2
2.3
30
1000
31.62
1.5
0.63
3.45
40
10000
100
2
2
4.61
50
100000
316.23
2.5
6.32
5.76
60
1000000
1000
3
20
6.91
70
10000000
3162.28
3.5
63.25
8.06
80
100000000
10000
4
200
9.21
90
1000000000
31622.78
4.5
632.46
10.36
100
10000000000
100000
5
2000
11.51
110
100000000000
316227.77
5.5
6324.56
12.66
120
1000000000000
1000000
6
20000
13.82
 
 
 
 
 
 
-96
0
0
-4.8
0
-11.05

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