Larson Davis System 824, Reference Manual

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9/13/00 C -13
Typical response of AUD A-weight and C-weight high
pass filters
Linearity range: >85 dB with Hanning window,
20 kHz bandwith, and PRM902
Dynamic range:
Flat SPL linearity range:
>100 dB
>75 dB
Frequency Weightings
Nominal
Freq. Exact
Freq. Flat A Weight C Weight
10 10.00 0.0 -72.6 -14.5
12.5 12.60 0.0 -65.5 -11.4
16 15.87 0.0 -58.8 -8.6
20 20.00 0.0 -52.5 -6.3
25 25.20 0.0 -46.8 -4.5
31.5 31.75 0.0 -41.5 -3.1
40 40.00 0.0 -36.6 -2.1
50 50.40 0.0 -32.2 -1.4
63 63.50 0.0 -28.2 -0.9
80 80.00 0.0 -24.5 -0.6
100 100.80 0.0 -21.1 -0.4
125 127.00 0.0 -18.1 -0.2
160 160.00 0.0 -15.3 -0.1
200 201.60 0.0 -12.8 -0.1
250 254.00 0.0 -10.6 -0.1
315 320.00 0.0 -8.6 0.0
400 403.20 0.0 -6.7 0.0
500 508.00 0.0 -5.2 0.0
630 640.00 0.0 -3.8 0.0
800 806.40 0.0 -2.8 0.0
1000 1016.00 0.0 -1.9 0.0
1250 1280.00 0.0 -1.3 0.0
1600 1613.00 0.0 -0.9 0.0
2000 2032.00 0.0 -0.6 0.0
2500 2560.00 0.0 -0.4 0.0
3150 3225.00 0.0 -0.2 0.0
4000 4064.00 0.0 -0.2 0.0
5000 5120.00 0.0 -0.1 0.0
6300 6451.00 0.0 -0.1 0.0
8000 8127.00 0.0 0.0 0.0
10000 10240.00 0.0 0.0 0.0
12500 12900.00 0.0 0.0 0.0
16000 16260.00 0.0 0.0 0.0
20000 20480.00 0.0 0.0 0.0