Larson Davis SoundAdvisor 831C Reference Manual page 171

Table A.7 Octave Band Analysis 1/3 Octave Linearity Range
Nominal
Frequency High OBA Range
(Hz)
0 dB
Gain (dB)
200 ≥ 120
20 to 140
250 ≥ 119
21 to 140
315 ≥ 119
22 to 140
400 ≥ 118
23 to 140
500 ≥ 117
23 to 140
630 ≥ 116
24 to 140
800 ≥ 115
25 to 140
1000 ≥ 114
27 to 140
1250 ≥ 113
27 to 140
1600 ≥ 112
29 to 140
2000 ≥ 111
29 to 140
2500 ≥ 110
30 to 140
3150 ≥ 109
31 to 140
4000 ≥ 108
32 to 140
5000 ≥ 107
34 to 140
6300 ≥ 106
35 to 140
8000 ≥ 105
36 to 140
10000 ≥ 104
37 to 140
SoundAdvisor Model 831C
Normal OBA Range
+20 dB 0 dB +20 dB
Gain (dB) Gain (µdB) Gain (dB)
≥ 106 ≥ 97
15 to 120 14 to 110 13 to 90
≥ 107 ≥ 98
14 to 120 12 to 110 11 to 90
≥ 108 ≥ 99
13 to 120 11 to 110 10 to 90
≥ 109 ≥ 100
12 to 120 10 to 110 9 to 90
≥ 110 ≥ 101
11 to 120 9 to 110 8 to 90
≥ 110 ≥ 101
10 to 120 9 to 110 7 to 90
≥ 110 ≥ 102
10 to 120 9 to 110 7 to 90
≥ 110 ≥ 102
10 to 120 9 to 110 6 to 90
≥ 110 ≥ 102
10 to 120 9 to 110 6 to 90
≥ 109 ≥ 101
11 to 120 9 to 110 5 to 90
≥ 109 ≥ 100
12 to 120 10 to 110 6 to 90
≥ 108 ≥ 100
12 to 120 10 to 110 6 to 90
≥ 107 ≥ 99
13 to 120 11 to 110 6 to 90
≥ 106 ≥ 98
14 to 120 12 to 110 7 to 90
≥ 105 ≥ 97
15 to 120 13 to 110 8 to 90
≥ 104 ≥ 96
16 to 120 14 to 110 9 to 90
≥ 103 ≥ 95
17 to 120 15 to 110 9 to 90
≥ 102 ≥ 94
18 to 120 16 to 110 10 to 90
Nominal
Frequency
(Hz)
Gain (dB)
≥ 77 200
22 to 140
≥ 79 250
22 to 140
≥ 80 315
23 to 140
≥ 81 400
24 to 140
≥ 82 500
24 to 140
≥ 83 630
25 to 140
≥ 84 800
26 to 140
≥ 84 1000
27 to 140
≥ 85 1250
27 to 140
≥ 85 1600
29 to 140
≥ 85 2000
30 to 140
≥ 84 2500
31 to 140
≥ 84 3150
32 to 140
≥ 83 4000
33 to 140
≥ 82 5000
34 to 140
≥ 82 6300
35 to 140
≥ 81 8000
36 to 140
≥ 80 10000
36 to 140
High OBA Range Normal OBA Range
0 dB
0 dB +20 dB
Gain
Gain (µdB)
(µdB)
≥ 119 ≥ 118 ≥ 110
2 to 120 1 to 110
≥ 118 ≥ 117 ≥ 109
3 to 120 1 to 110
≥ 117 ≥ 117 ≥ 109
4 to 120 1 to 110
≥ 117 ≥ 116 ≥ 108
4 to 120 2 to 110
≥ 116 ≥ 116 ≥ 108
4 to 120 3 to 110
≥ 115 ≥ 115 ≥ 107
5 to 120 3 to 110
≥ 115 ≥ 114 ≥ 106
6 to 120 4 to 110
≥ 114 ≥ 113 ≥ 105
7 to 120 5 to 110
≥ 113 ≥ 112 ≥ 104
8 to 120 6 to 110
≥ 111 ≥ 111 ≥ 103
9 to 120 7 to 110
≥ 111 ≥ 110 ≥ 102
10 to 120 8 to 110
≥ 110 ≥ 109 ≥ 101
11 to 120 9 to 110
≥ 109 ≥ 108 ≥ 100
12 to 120 10 to 110
≥ 108 ≥ 107 ≥ 99
13 to 120 11 to 110
≥ 107 ≥ 106 ≥ 98
14 to 120 12 to 110
≥ 106 ≥ 105 ≥ 97
15 to 120 13 to 110
≥ 105 ≥ 104 ≥ 96
16 to 120 14 to 110
≥ 104 ≥ 103 ≥ 95
17 to 120 15 to 110
+20 dB
Gain
(µdB)
≥ 99
-9 to 90
≥ 98
-8 to 90
≥ 97
-7 to 90
≥ 96
-6 to 90
≥ 95
-5 to 90
≥ 94
-4 to 90
≥ 94
-4 to 90
≥ 93
-3 to 90
≥ 92
-2 to 90
≥ 91
-1 to 90
≥ 90
0 to 90
≥ 89
1 to 90
≥ 89
2 to 90
≥ 88
3 to 90
≥ 87
4 to 90
≥ 86
5 to 90
≥ 85
5 to 90
≥ 84
6 to 90
A-11