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Larson Davis 831 - Page 468

Larson Davis 831
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Model 831 Manual Position of Instrument and OperatorA-31
Table A-23 Directional Response of 3 1/2" Windscreen
Frequency Angle from Reference direction (degrees)
(Hz) 0 15 30 45 60 75 90 105 120 135 150 165 180
2818.38 0.57 0.53 0.57 0.60 0.50 0.50 0.53 0.53 0.57 0.57 0.43 0.57 0.50
2985.38 0.40 0.50 0.43 0.57 0.43 0.50 0.57 0.53 0.57 0.57 0.37 0.50 0.50
3162.28 0.40 0.40 0.53 0.50 0.33 0.57 0.50 0.47 0.53 0.50 0.43 0.50 0.50
3349.65 0.30 0.40 0.37 0.37 0.37 0.43 0.40 0.40 0.43 0.43 0.40 0.50 0.50
3548.13 0.23 0.27 0.33 0.30 0.23 0.37 0.33 0.33 0.37 0.40 0.33 0.40 0.40
3758.37 0.20 0.23 0.13 0.17 0.23 0.27 0.20 0.23 0.33 0.37 0.27 0.40 0.30
3981.07 0.10 0.10 0.13 0.13 0.00 0.13 0.10 0.10 0.23 0.20 0.13 0.27 0.23
4216.97 0.03 0.00 0.10 0.03 -0.10 0.07 0.00 -0.03 0.07 0.03 0.03 0.10 0.13
4466.84 0.00 -0.07 -0.07 -0.07 -0.17 -0.07 -0.10 -0.10 -0.07 0.00 -0.07 0.00 0.00
4731.51 -0.30 -0.20 -0.17 -0.23 -0.27 -0.30 -0.30 -0.43 -0.27 -0.20 -0.37 -0.20 -0.20
5011.87 -0.17 -0.20 -0.17 -0.30 -0.27 -0.23 -0.40 -0.33 -0.37 -0.40 -0.37 -0.30 -0.30
5308.84 0.00 -0.10 -0.07 -0.23 -0.30 -0.33 -0.40 -0.43 -0.47 -0.50 -0.60 -0.43 -0.43
5623.41 0.00 -0.07 -0.03 -0.17 -0.20 -0.33 -0.37 -0.43 -0.47 -0.50 -0.53 -0.43 -0.43
5956.62 0.17 0.07 0.10 -0.13 -0.17 -0.23 -0.33 -0.37 -0.43 -0.50 -0.57 -0.50 -0.40
6309.57 0.10 0.20 0.23 -0.03 -0.07 -0.03 -0.10 -0.33 -0.37 -0.40 -0.47 -0.40 -0.30
6683.44 0.13 0.10 0.20 0.07 -0.03 -0.03 -0.13 -0.17 -0.27 -0.33 -0.40 -0.40 -0.20
7079.46 0.03 0.07 0.07 0.07 0.03 0.00 -0.10 -0.13 -0.17 -0.27 -0.27 -0.23 -0.13
7498.94 -0.10 -0.10 -0.07 -0.03 -0.07 -0.03 -0.20 -0.23 -0.27 -0.20 -0.27 -0.10 -0.10
7943.28 -0.30 -0.37 -0.30 -0.23 -0.33 -0.23 -0.33 -0.40 -0.37 -0.33 -0.33 -0.20 -0.17
8413.95 -0.40 -0.37 -0.37 -0.43 -0.53 -0.43 -0.57 -0.57 -0.57 -0.50 -0.43 -0.23 -0.37
8912.51 -0.40 -0.50 -0.37 -0.53 -0.67 -0.63 -0.70 -0.73 -0.73 -0.80 -0.73 -0.50 -0.50
9440.61 -0.37 -0.40 -0.37 -0.50 -0.67 -0.70 -0.70 -0.83 -0.77 -0.90 -0.93 -0.77 -0.60
10000.00 -0.13 -0.20 -0.27 -0.43 -0.57 -0.57 -0.77 -0.83 -0.77 -0.90 -0.97 -0.90 -0.70
10592.54 -0.20 -0.20 -0.17 -0.40 -0.47 -0.47 -0.70 -0.83 -0.83 -0.83 -0.97 -0.87 -0.70
11220.18 -0.47 -0.43 -0.37 -0.43 -0.53 -0.47 -0.70 -0.90 -0.77 -0.80 -0.77 -0.90 -0.67
11885.02 -0.67 -0.73 -0.63 -0.60 -0.73 -0.57 -0.83 -0.90 -0.83 -0.87 -0.73 -0.70 -0.70
12589.25 -0.57 -0.73 -0.83 -0.87 -0.97 -0.97 -1.00 -1.00 -1.00 -1.17 -1.07 -0.90 -0.90
13335.21 -0.70 -0.67 -0.63 -0.83 -1.00 -1.17 -1.10 -1.07 -1.07 -1.37 -1.53 -1.20 -1.13
14125.38 -0.40 -0.50 -0.57 -0.60 -0.90 -1.00 -1.00 -1.20 -1.17 -1.37 -1.63 -1.47 -1.20
14962.36 -0.70 -0.73 -0.53 -0.73 -0.97 -0.90 -1.10 -1.33 -1.23 -1.50 -1.53 -1.43 -1.13
15848.93 -0.90 -0.90 -0.97 -1.03 -1.27 -1.13 -1.30 -1.60 -1.37 -1.57 -1.37 -1.40 -1.17
16788.04 -0.90 -1.07 -1.00 -1.30 -1.33 -1.47 -1.50 -1.53 -1.40 -1.70 -1.77 -1.43 -1.43
17782.79 -0.87 -0.93 -0.93 -1.10 -1.33 -1.53 -1.70 -1.57 -1.67 -1.73 -2.30 -2.00 -1.70
18836.49 -0.90 -1.10 -0.90 -1.10 -1.43 -1.43 -1.70 -1.83 -1.80 -1.83 -2.13 -2.27 -1.77
19952.62 -1.27 -1.30 -1.13 -1.47 -1.73 -1.67 -2.07 -2.30 -1.97 -2.23 -2.13 -1.97 -1.67

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