BRUEL & KJAER 2240 - Free-field Frequency Response Data

APPENDIX A
Tables
25
A.2 Free-field Frequency Response
Table A.2 Free-field 0° frequency response for Sound Level Meter Type 2240 with Microphone Type 4188
Nominal
Frequency
(Hz)
Exact
Frequency
(6 digits)
(Hz)
Microphone
Free-field
Response
(dB)
Body
Influence
(dB)
Electrical
Response
C-weighted
(dB)
Electrical
Response
A-weighted
(dB)
Acoustical
Response
C-weighted
(dB)
Acoustical
Response
A-weighted
(dB)
Expanded
Uncertainty of
Measurement
(dB)
63 63.0957 0.31 0.00 –0.88 –26.26 –0.56 –25.94 0.30
80 79.4328 0.27 0.00 –0.53 –22.54 –0.26 –22.26 0.30
100 100 0.23 0.00 –0.32 –19.17 –0.09 –18.93 0.30
125 125.893 0.19 0.00 –0.18 –16.11 0.02 –15.92 0.30
160 158.489 0.16 0.00 –0.09 –13.35 0.08 –13.19 0.30
200 199.526 0.12 0.00 –0.03 –10.87 0.09 –10.74 0.30
250 251.189 0.08 0.03 0.00 –8.63 0.11 –8.53 0.30
315 316.228 0.05 0.02 0.02 –6.61 0.09 –6.54 0.30
400 398.107 0.04 0.02 0.03 –4.81 0.09 –4.75 0.30
500 501.187 0.03 0.12 0.03 –3.23 0.18 –3.09 0.30
630 630.957 0.01 0.27 0.03 –1.90 0.30 –1.63 0.30
800 794.328 0.00 0.23 0.02 –0.82 0.26 –0.58 0.30
1000 1000 0.00 –0.05 0.00 0.00 –0.05 –0.05 0.30
1060 1059.25 0.00 0.02 –0.01 0.17 0.01 0.18 0.30
1120 1122.02 –0.01 0.02 –0.01 0.32 0.00 0.33 0.30
1180 1188.5 –0.01 0.02 –0.02 0.46 –0.02 0.47 0.30
1250 1258.93 –0.02 0.00 –0.03 0.59 –0.05 0.58 0.30
1320 1333.52 –0.02 0.02 –0.04 0.71 –0.04 0.71 0.30
1400 1412.54 –0.02 –0.10 –0.06 0.81 –0.18 0.69 0.30
1500 1496.24 –0.03 –0.40 –0.07 0.90 –0.49 0.48 0.30
1600 1584.89 –0.03 –0.48 –0.08 0.98 –0.59 0.47 0.30
1700 1678.8 –0.03 –0.49 –0.10 1.05 –0.62 0.53 0.30
1800 1778.28 –0.03 –0.45 –0.12 1.11 –0.61 0.62 0.30
1900 1883.65 –0.03 –0.16 –0.14 1.16 –0.34 0.97 0.30
2000 1995.26 –0.03 –0.02 –0.17 1.20 –0.22 1.15 0.30
2120 2113.49 –0.04 –0.02 –0.20 1.23 –0.25 1.18 0.30
2240 2238.72 –0.03 –0.10 –0.23 1.25 –0.36 1.12 0.30
2360 2371.37 –0.04 –0.05 –0.26 1.27 –0.35 1.18 0.30
2500 2511.89 –0.04 –0.17 –0.30 1.27 –0.50 1.07 0.30
2650 2660.73 –0.04 0.13 –0.34 1.27 –0.24 1.37 0.30
2800 2818.38 –0.03 0.34 –0.39 1.25 –0.09 1.56 0.30
3000 2985.38 –0.03 0.30 –0.44 1.23 –0.17 1.50 0.30
3150 3162.28 –0.02 0.20 –0.50 1.20 –0.32 1.38 0.30
3350 3349.65 –0.01 0.15 –0.57 1.16 –0.43 1.29 0.40
3550 3548.13 0.00 0.08 –0.65 1.10 –0.57 1.18 0.40
3750 3758.37 0.00 –0.05 –0.73 1.04 –0.78 0.99 0.40