Larson Davis 831 - Page 442

Model 831 Manual Model 831 Specifications A-5
The Octave Band Analysis specifications in the following tables were determined with an ADP090
equivalent microphone.
Nominal
Frequency (Hz)
PRM 831
Direct Input
2
0 dB Gain
(dB)
+20 dB Gain
(dB)
0 dB Gain (dB) +20 db Gain (dB)
Normal OBA Range Linearity Range
1
8.0 78
62 to 140
 83
37 to 120
 78
62 to 140 dBV
 83
37 to 120 dBV
16.0  85
55 to 140
 88
32 to 120
85
55 to 140 dBV
88
32 to 120 dBV
31.5 87
53 to 140
89
31 to 120
87
53 to 140 dBV
89
31 to 120 dBV
63.0 92
48 to 140
90
30 to 120
92
48 to 140 dBV
90
30 to 120 dBV
125.0 95
45 to 140
89
31 to 120
95
45 to 140 dBV
89
31 to 120 dBV
250.0 94
46 to 140
92
28 to 120
94
46 to 140 dBV
92
28 to 120 dBV
500.0 90
50 to 140
91
29 to 120
90
50 to 140 dBV
91
29 to 120
dBV
1000.0 95
45 to 140
95
25 to 120
95
45 to 140 dBV
95
25 to 120 dBV
2000.0 92

95
25 to 120
92
48 to 140 dBV
95
25 to 120 dBV
4000.0 90
50 to 140
92
28 to 120
90
50 to 140 dBV
92
28 to 120 dBV
8000.0 88
52 to 140
87
33 to 120
88
50 to 140 dBV
87
33 to 120 dBV
16000.0 85
55 to 140
85
35 to 120
85
55 to 140 dBV
85
35 to 120 dBV