Larson Davis SoundAdvisor, Reference Manual

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SoundAdvisor Model 831C A-12
FIGURE A-2 Self-generated noise levels for 1/1 octave filters with PRM831
Cont...Octave Band Analysis 1/3 Octave Linearity Range
Nominal
Frequency
(Hz)
High OBA Range Normal OBA Range
Nominal
Frequency
(Hz)
High OBA Range Normal OBA Range
PRM831
0 dB
Gain (dB)
+20 dB
Gain (dB)
0 dB
Gain (µdB)
+20 dB
Gain (dB)
Direct Input
0 dB
Gain (dB)
+20 dB
Gain (µdB)
0 dB
Gain
(µdB)
+20 dB
Gain
(µdB)
2500 ≥ 110
30 to 140
≥ 108
12 to 120
≥ 100
10 to 110
≥ 84
6 to 90
2500 ≥ 110
31 to 140
≥ 109
11 to 120
≥ 101
9 to 110
≥ 89
1 to 90
3150 ≥ 109
31 to 140
≥ 107
13 to 120
≥ 99
11 to 110
≥ 84
6 to 90
3150 ≥ 109
32 to 140
≥ 108
12 to 120
≥ 100
10 to 110
≥ 89
2 to 90
4000 ≥ 108
32 to 140
≥ 106
14 to 120
≥ 98
12 to 110
≥ 83
7 to 90
4000 ≥ 108
33 to 140
≥ 107
13 to 120
≥ 99
11 to 110
≥ 88
3 to 90
5000 ≥ 107
34 to 140
≥ 105
15 to 120
≥ 97
13 to 110
≥ 82
8 to 90
5000 ≥ 107
34 to 140
≥ 106
14 to 120
≥ 98
12 to 110
≥ 87
4 to 90
6300 ≥ 106
35 to 140
≥ 104
16 to 120
≥ 96
14 to 110
≥ 82
9 to 90
6300 ≥ 106
35 to 140
≥ 105
15 to 120
≥ 97
13 to 110
≥ 86
5 to 90
8000 ≥ 105
36 to 140
≥ 103
17 to 120
≥ 95
15 to 110
≥ 81
9 to 90
8000 ≥ 105
36 to 140
≥ 104
16 to 120
≥ 96
14 to 110
≥ 85
5 to 90
10000 ≥ 104
37 to 140
≥ 102
18 to 120
≥ 94
16 to 110
≥ 80
10 to 90
10000 ≥ 104
36 to 140
≥ 103
17 to 120
≥ 95
15 to 110
≥ 84
6 to 90
12500 ≥ 103
38 to 140
≥ 101
19 to 120
≥ 93
17 to 110
≥ 79
11 to 90
12500 ≥ 103
37 to 140
≥ 102
87 to 120
≥ 94
16 to 110
≥ 83
7 to 90
16000 ≥ 101
39 to 140
≥ 100
20 to 120
≥ 92
18 to 110
≥ 78
12 to 90
16000 ≥ 101
39 to 140
≥ 101
19 to 120
≥ 93
17 to 110
≥ 82
9 to 90
20000 ≥ 100
40 to 140
≥ 99
21 to 120
≥ 91
19 to 110
≥ 77
13 to 90
20000 ≥ 100
40 to 140
≥ 100
20 to 120
≥ 92
18 to 110
≥ 81
10 to 90
-30.0
-20.0
-10.0
0.0
10.0
20.0
30.0
40.0
50.0
1 10 100 1000 10000
PRM831 1/1 OBA Noise Floor
High +0dB
High +20dB
0dB
20dB