Instruction Manual

Sound Level Meter Types 2245 – Instruction Manual Page 70 of 110
Appendix A
Tables
Electrical Frequency Responses
Uncompensated electrical frequency responses for the different frequency weightings.
Please see the instructions in section 3.2.2 on how to ensure an uncompensated
electrical frequency response.
Table A.1 Uncompensated electrical frequency responses
A-
weighting
B-
weighting
C-
weighting
Z-
weighting
A-
weighting
B-
weighting
C-
weighting
63 63.0957 -26.24 -9.39 -0.86 0.04 -26.21 -9.36 -0.83
80 79.4328 -22.55 -7.41 -0.55 0.04 -22.51 -7.37 -0.51
100 100.000 -19.19 -5.69 -0.34 0.04 -19.15 -5.65 -0.30
125 125.893 -16.15 -4.23 -0.21 0.04 -16.10 -4.19 -0.17
160 158.489 -13.40 -3.03 -0.13 0.04 -13.35 -2.99 -0.09
200 199.526 -10.92 -2.09 -0.08 0.04 -10.87 -2.05 -0.03
250 251.189 -8.68 -1.39 -0.04 0.04 -8.63 -1.35 0.00
315 316.228 -6.66 -0.89 -0.03 0.04 -6.62 -0.85 0.02
400 398.107 -4.85 -0.55 -0.02 0.04 -4.81 -0.51 0.02
500 501.187 -3.28 -0.32 -0.01 0.04 -3.24 -0.28 0.03
630 630.957 -1.95 -0.17 -0.02 0.03 -1.91 -0.14 0.02
800 794.328 -0.87 -0.09 -0.03 0.03 -0.84 -0.06 0.01
1000 1000.00 -0.04 -0.04 -0.04 0.03 -0.02 -0.02 -0.02
1060 1059.25 0.12 -0.04 -0.05 0.02 0.15 -0.01 -0.03
1120 1122.02 0.28 -0.04 -0.06 0.02 0.30 -0.01 -0.04
1180 1188.50 0.42 -0.04 -0.07 0.02 0.44 -0.01 -0.05
1250 1258.93 0.55 -0.04 -0.08 0.02 0.57 -0.02 -0.06
1320 1333.52 0.66 -0.04 -0.09 0.02 0.68 -0.02 -0.07
1400 1412.54 0.76 -0.05 -0.10 0.02 0.78 -0.03 -0.08
1500 1496.24 0.86 -0.05 -0.11 0.02 0.87 -0.04 -0.10
1600 1584.89 0.94 -0.07 -0.13 0.02 0.95 -0.05 -0.11
1700 1678.80 1.01 -0.08 -0.15 0.01 1.02 -0.06 -0.13
1800 1778.28 1.07 -0.09 -0.17 0.01 1.08 -0.08 -0.15
1900 1883.65 1.11 -0.11 -0.19 0.01 1.13 -0.10 -0.18
2000 1995.26 1.15 -0.13 -0.21 0.01 1.17 -0.12 -0.20
2120 2113.49 1.19 -0.16 -0.24 0.01 1.20 -0.15 -0.23
2240 2238.72 1.21 -0.19 -0.27 0.01 1.22 -0.18 -0.26
2360 2371.37 1.22 -0.22 -0.31 0.01 1.23 -0.21 -0.30
2500 2511.89 1.23 -0.25 -0.34 0.01 1.23 -0.25 -0.34
2650 2660.73 1.22 -0.30 -0.39 0.01 1.23 -0.29 -0.38
2800 2818.38 1.21 -0.34 -0.44 0.01 1.21 -0.33 -0.43
Electrical
Response
(dB)
Add to Acoustical
Responses
(dB)
Exact
Frequency
(6 digits)
(Hz)
Nominal
Frequency
(Hz)