Correction value of A-weighting in sound level meter

The following is a list of correction value for A-weighting. The correction value is described in 「JIS C 1509」. Add the corresponding value to the Z-weighting value.

 

Frequency(Hz) Correction value(dB)
20 -50.5
25 -44.7
31.5 -39.4
40 -34.6
50 -30.2
63 -26.2
80 -22.5
100 -19.1
125 -16.1
160 -13.4
200 -10.9
250 -8.6
315 -6.6
400 -4.8
500 -3.2
630 -1.9
800 -0.8
1000 0.0
1250 0.6
1600 1.0
2000 1.2
2500 1.3
3150 1.2
4000 1.0
5000 0.5
6300 -0.1
8000 -1.1
10000 -2.5
12500 -4.3
16000 -6.6
20000 -9.3

Revised:2006.10.23


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