Larson Davis System 824 - Page 475

9/13/00 C-7
Frequency Weightings
Nominal
Freq.
Exact
Freq.
Flat A Weight C Weight Electrical
To l e r an c e
Mic.
To l e r an c e
10 10.00 -6.0 -70.4 -14.3 ±1.8 ±2.2
12.5 12.59 -4.2 -63.4 -11.2 ±1.5 ±2.0
16 15.85 -2.9 -56.7 -8.5 ±1.2 ±1.8
20 19.95 -1.9 -50.5 -6.2 ±1.0 ±1.5
25 25.12 -1.3 -44.7 -4.4 ±0.9 ±1.1
31.5 31.62 -0.8 -39.4 -3.0 ±0.7 ±0.8
40 39.81 -0.5 -34.6 -2.0 ±0.7 ±0.8
50 50.12 -0.3 -30.2 -1.3 ±0.5 ±0.5
63 63.10 -0.2 -26.2 -0.8 ±0.5 ±0.5
80 79.43 -0.1 -22.5 -0.5 ±0.5 ±0.5
100 100.00 -0.1 -19.1 -0.3 ±0.5 ±0.5
125 125.00 0.0 -16.1 -0.2 ±0.5 ±0.5
160 158.50 0.0 -13.4 -0.1 ±0.5 ±0.5
200 199.50 0.0 -10.9 0.0 ±0.5 ±0.5
250 251.20 0.0 -8.6 0.0 ±0.5 ±0.5
315 316.20 0.0 -6.6 0.0 ±0.4 ±0.6
400 398.10 0.0 -4.8 0.0 ±0.4 ±0.6
500 501.20 0.0 -3.2 0.0 ±0.4 ±0.6
630 631.00 0.0 -1.9 0.0 ±0.4 ±0.6
800 794.30 0.0 -0.8 0.0 ±0.4 ±0.6
1000 1000.00 0.0 0.0 0.0 ±0.4 ±0.6
1250 1259.00 0.0 0.6 0.0 ±0.4 ±0.6
1600 1585.00 0.0 1.0 -0.1 ±0.4 ±0.6
2000 1995.00 0.0 1.2 -0.2 ±0.4 ±0.6
2500 2512.00 0.0 1.3 -0.3 ±0.4 ±0.6
3150 3162.00 0.0 1.2 -0.5 ±0.4 ±0.6
4000 3981.00 0.0 1.0 -0.8 ±0.4 ±0.6
5000 5012.00 0.0 0.5 -1.3 ±0.5 ±-1.0
6300 6310.00 0.0 -0.1 -2.0 0.5, -0.7 1.0, -1.4
8000 7943.00 0.0 -1.1 -3.0 0.5, -1.0 1.0, -2.0
10000 10000.00 0.0 -2.5 -4.4 0.7, -1.3 1.3, -2.7
12500 12590.00 0.0 -4.3 -6.2 1.0, -2.0 2.0, -4.0
16000 15850.00 0.0 -6.6 -8.5 1.0, -3.0 2.0,
∞
∞∞
∞
20000 19950.00 0.0 -9.3 -11.2 1.0, -4.0 2.0,
∞
∞∞
∞
LOG and ISM Mode Specifications
Time weighting: Slow, Fast, Impluse,
TWA and Peak
Dynamic range: > 115 dBA (Overload to
noise floor)
Linearity range: > 105 dBA