Larson Davis SoundAdvisor 831C Reference Manual page 205

Integration Method
SoundAdvisor Model 831C
Flat-Weighting: A filter that does not adjust the levels of a frequency spectrum. It is sometimes an
alternative selection for the frequency-weighting selection.
Z-Weighting: Similar to a flat-weighting curve, this is a bandpass filter with a passband from 10 Hz
to 20 kHz.
Table C.4 Frequency Filter Response
Center Frequencies,
Hz
1/3
Octave
20
25
31.5
40
50
63
80
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
4000
5000
6300
8000
10000
12500
16000
20000
See "Linear Integration", or "Exponential Integration".
Weighting Network Frequency
Response
1 Octave A
-50.4
-44.7
31.5 -39.4
-34.6
-30.2
63 -26.2
-22.5
-19.1
125 -16.1
-13.4
-10.9
250 -8.6
-6.6
-4.8
500 -3.2
-1.9
-0.8
1000 0
0.6
1.0
2000 1.2
1.3
1.2
4000 1.0
0.5
-0.1
8000 -1.1
-2.5
-4.3
16000 -6.6
-9.3
B C
-24.2 -6.2
-20.4 -4.4
-17.1 -3.0
-14.2 -2.0
-11.6 -1.3
-9.3 -0.8
-7.4 -0.5
-5.6 -0.3
-4.2 -0.2
-3.0 -0.1
-2.0 0
-1.3 0
-0.8 0
-0.5 0
-0.3 0
-0.1 0
0 0
0 0
0 0
0 -0.1
-0.1 -0.2
-0.2 -0.3
-0.4 -0.5
-0.7 -0.8
-1.2 -1.3
-1.9 -2.0
-2.9 -3.0
-4.3 -4.4
-6.1 -6.2
-8.4 -8.5
-11.1 -11.2
C-8