Larson Davis 824 - Page 563

9/29/09 C-17
Typical response of AUD A-weight and C-weight high
pass filters
Frequency Weightings
Nominal
Freq.
Exact
Freq.
Flat A Weight C Weight
10 10.00 0.0 -72.6 -14.5
12.5 12.59 0.0 -65.5 -11.4
16 15.85 0.0 -58.8 -8.6
20 19.95 0.0 -52.5 -6.3
25 25.12 0.0 -46.8 -4.5
31.5 31.62 0.0 -41.5 -3.1
40 39.81 0.0 -36.6 -2.1
50 50.12 0.0 -32.2 -1.4
63 63.10 0.0 -28.2 -0.9
80 79.43 0.0 -24.5 -0.6
100 100.00 0.0 -21.1 -0.4
125 125.00 0.0 -18.1 -0.2
160 158.50 0.0 -15.3 -0.1
200 199.50 0.0 -12.8 -0.1
250 251.20 0.0 -10.6 -0.1
315 316.20 0.0 -8.6 0.0
400 398.10 0.0 -6.7 0.0
500 501.20 0.0 -5.2 0.0
630 631.00 0.0 -3.8 0.0
800 794.30 0.0 -2.8 0.0
1000 1000.00 0.0 -1.9 0.0
1250 1259.00 0.0 -1.3 0.0
1600 1585.00 0.0 -0.9 0.0
2000 1995.00 0.0 -0.6 0.0
2500 2512.00 0.0 -0.4 0.0
3150 3162.00 0.0 -0.2 0.0
4000 3981.00 0.0 -0.2 0.0
5000 5012.00 0.0 -0.1 0.0
6300 6310.00 0.0 -0.1 0.0
8000 7943.00 0.0 0.0 0.0
10000 10000.00 0.0 0.0 0.0
12500 12590.00 0.0 0.0 0.0
16000 15850.00 0.0 0.0 0.0
20000 19950.00 0.0 0.0 0.0