A-26
1/1 and 1/3 Octave Filters
Model 831 Manual
1/3 Octave Filter Linearity
The filter linearity range depends upon both the Input Gain, which is set as described in the section "20
dB Gain" on page 4-5, and the Filter Range, which is set as described in the section "OBA Range
Setting" on page 4-7.The data, which were measured using an electrical input, are in dB re. 1
V,
which is equivalent to dBSPL when a 50 mV/Pa microphone is use.
Table A-21 1/3 Octave Linearity Range
Gain
0 dB
0 dB
20 dB
20 dB
Range
Normal
Low
Normal
Low
Frequency
Overload
Linearity
Range
Lower
Linearity
Limit
Noise Floor Overload
Linearity
Range
Lower
Linearity
Limit
Noise Floor Overload
Linearity
Range
Lower
Linearity
Limit
Noise Floor Overload
Linearity
Range
Lower
Linearity
Limit
Noise Floor
6.3
140.8
88.1
52.0
27.6
107.5
71.5
36.0
12.3
120.7
81.7
39.0
13.5
87.0
53.0
34.0
9.9
8
140.8
91.8
49.0
26.7
107.5
74.5
33.0
9.6
120.7
87.7
33.0
12.7
87.0
47.0
40.0
9.6
10
140.8
92.8
48.0
28.4
107.5
78.5
29.0
8.3
120.7
87.7
33.0
11.3
87.0
58.0
29.0
9.3
12.5
140.8
91.8
49.0
28.2
107.5
75.9
31.6
8.8
120.7
89.7
31.0
9.1
87.0
59.0
28.0
7.9
16
140.8
91.8
49.0
25.5
107.5
76.7
30.8
6.9
120.7
88.7
32.0
10.6
87.0
60.0
27.0
6.8
20
140.8
92.8
48.0
27.7
107.5
78.7
28.8
6.0
120.7
90.7
30.0
9.8
87.0
59.0
28.0
5.6
25
140.8
94.8
46.0
25.7
107.5
81.5
26.0
5.5
120.7
87.7
33.0
8.8
87.0
60.0
27.0
5.9
31.5
140.8
93.8
47.0
26.5
107.5
85.5
22.0
5.3
120.7
90.7
30.0
8.4
87.0
64.0
23.0
4.1
40
140.8
93.8
47.0
25.7
107.5
85.5
22.0
3.6
120.7
92.7
28.0
8.1
87.0
63.0
24.0
2.6
50
140.8
95.8
45.0
25.2
107.5
86.5
21.0
1.5
120.7
92.7
28.0
7.7
87.0
66.0
21.0
2.5
63
140.8
97.8
43.0
25.7
107.5
87.5
20.0
1.5
120.7
95.7
25.0
8.4
87.0
67.0
20.0
2.9
80
140.8
98.8
42.0
25.8
107.5
83.5
24.0
1.2
120.7
93.7
27.0
7.5
87.0
71.0
16.0
2.7
100
140.8
97.8
43.0
25.0
107.5
84.5
23.0
0.5
120.7
96.7
24.0
7.6
87.0
69.0
18.0
2.3
125
140.8
96.8
44.0
24.6
107.5
87.5
20.0
-1.4
120.7
94.7
26.0
6.2
87.0
71.0
16.0
-0.3
160
140.8
100.8
40.0
25.2
107.5
88.5
19.0
-1.8
120.7
95.7
25.0
4.4
87.0
73.0
14.0
-2.4
200
140.8
99.8
41.0
25.6
107.5
87.5
20.0
-1.8
120.7
99.7
21.0
5.8
87.0
71.0
16.0
-1.5
250
140.8
99.8
41.0
27.7
107.5
93.5
14.0
-3.0
120.7
98.7
22.0
4.8
87.0
75.0
12.0
-3.0
315
140.8
101.8
39.0
26.5
107.5
96.5
11.0
-2.5
120.7
99.7
21.0
5.6
87.0
74.0
13.0
-3.1
400
140.8
97.8
43.0
26.0
107.5
95.5
12.0
-2.0
120.7
96.7
24.0
8.1
87.0
75.0
12.0
-3.6
500
140.8
98.8
42.0
25.9
107.5
89.5
18.0
-2.1
120.7
92.7
28.0
5.6
87.0
79.0
8.0
-3.1
630
140.8
101.7
39.1
25.8
107.5
96.5
11.0
-2.3
120.7
100.7
20.0
6.0
87.0
80.0
7.0
-4.2
800
140.8
100.7
40.1
26.5
107.5
94.5
13.0
-3.0
120.7
99.7
21.0
6.1
87.0
81.0
6.0
-4.1
1000
140.8
97.8
43.0
26.9
107.5
95.5
12.0
-3.1
120.7
100.7
20.0
6.4
87.0
81.0
6.0
-4.9
1250
140.8
99.8
41.0
27.8
107.5
97.5
10.0
-2.9
120.7
100.7
20.0
7.6
87.0
79.0
8.0
-6.6
1600
140.8
100.8
40.0
28.3
107.5
96.5
11.0
-2.6
120.7
100.7
20.0
8.0
87.0
82.0
5.0
-7.4
2000
140.8
100.8
40.0
28.8
107.5
97.5
10.0
-2.1
120.7
100.7
20.0
8.7
87.0
82.0
5.0
-7.7
2500
140.8
99.8
41.0
29.8
107.5
96.5
11.0
-1.5
120.7
99.7
21.0
9.6
87.0
81.0
6.0
-7.6
3150
140.8
96.8
44.0
30.9
107.5
94.5
13.0
-0.4
120.7
98.7
22.0
10.6
87.0
81.0
6.0
-7.6
4000
140.8
97.7
43.1
31.9
107.5
94.5
13.0
0.4
120.7
97.7
23.0
11.6
87.0
82.0
5.0
-7.0
5000
140.8
95.7
45.1
33.1
107.5
92.5
15.0
1.4
120.7
96.7
24.0
13.0
87.0
82.0
5.0
-6.5
6300
140.8
93.8
47.0
33.9
107.5
93.5
14.0
2.4
120.7
94.7
26.0
14.1
87.0
81.0
6.0
-6.1
8000
140.8
91.8
49.0
35.5
107.5
91.5
16.0
3.5
120.7
92.7
28.0
15.0
87.0
80.0
7.0
-5.2
10000
140.8
92.7
48.1
36.6
107.5
90.5
17.0
4.5
120.7
93.7
27.0
16.4
87.0
79.0
8.0
-4.5
12500
140.8
91.7
49.1
37.6
107.5
89.5
18.0
5.8
120.7
91.7
29.0
17.5
87.0
79.0
8.0
-3.6
16000
140.8
90.8
50.0
38.6
107.5
89.5
18.0
6.5
120.7
91.7
29.0
18.5
87.0
78.0
9.0
-2.9
20000
140.8
88.8
52.0
40.2
107.5
87.7
19.8
8.2
120.7
89.7
31.0
20.2
87.0
77.0
10.0
-1.6
Summary of Contents for 831
Page 1: ...Model 831 Sound Level Meter Manual...
Page 2: ...I831 01 Rev O Manual Larson Davis Model 831 Manual...
Page 123: ...5 44 Any Level Display Model 831 Manual...
Page 135: ...6 12 Run Modes Without Measurement History Model 831 Manual...
Page 155: ...7 20 Recovery After Improper Shutdown Model 831 Manual...
Page 209: ...11 22 Markers Model 831 Manual...
Page 221: ...12 12 Link to Time History Model 831 Manual FIGURE 12 11 Time History Display...
Page 321: ...16 24 Sound Recording Playback Model 831 Manual...
Page 358: ...Model 831 Manual Displays 18 27 FIGURE 18 42 Measurement Displays FIGURE 18 43 Events Displays...
Page 403: ...20 28 Troubleshooting Model 831 Manual...
Page 413: ...21 10 Calibration When The Model 831 Is Locked Model 831 Manual...
Page 421: ...23 4 File System Model 831 Manual...
Page 501: ...A 64 Vibration Sensitivity Model 831 Manual...
Page 513: ...B 12 Sections 5 6 7 and 9 except 9 3 Model 831 Manual...
Page 525: ...C 12 Community Noise Descriptors Model 831 Manual...
