Spartan 821/721 Manual
IEC 61672-1 Section 9.3
B-10
11885
-0.53
-0.58
-0.73
-0.87
-0.78
-0.80
-0.90
-0.80
-1.00
-0.98
12589
-1.05
-1.03
-1.03
-1.00
-1.10
-1.07
-1.10
-1.20
-1.28
-1.42
13335
-0.70
-0.65
-0.70
-0.88
-0.95
-1.03
-1.12
-1.15
-1.20
-1.35
14125
-0.71
-0.80
-0.78
-0.83
-0.93
-0.97
-1.05
-1.17
-1.20
-1.48
14962
-0.98
-1.08
-1.03
-1.02
-1.00
-1.08
-1.10
-1.10
-1.47
-1.47
15849
-1.40
-1.40
-1.40
-1.30
-1.23
-1.40
-1.22
-1.50
-1.75
-1.70
16788
-1.10
-1.00
-1.10
-1.20
-1.15
-1.22
-1.30
-1.47
-1.70
-1.60
17783
-1.13
-1.12
-1.10
-1.20
-1.30
-1.38
-1.55
-1.80
-1.90
-1.90
18836
-1.55
-1.65
-1.53
-1.42
-1.52
-1.57
-1.77
-1.90
-2.05
-2.20
19953
-1.58
-1.93
-1.73
-1.73
-2.13
-1.75
-1.69
-2.47
-2.30
-2.62
1. Note: These values represent the typical effect of the WS001 windscreen on the acoustic response of the 821/
721 sound level meter. They may be subtracted from a measured value to correct for the windscreen effect.
TABLE B.4
Directional Response (from 100° to 180°) of 3 ½-inch Windscreen
Frequency (Hz)
Angle from Reference Direction (Degrees)
1
100°
110°
120°
130°
140°
150°
160°
170°
180°
63
-0.12
-0.08
-0.08
-0.08
-0.07
-0.06
-0.08
-0.06
-0.10
79
-0.12
-0.08
-0.08
-0.08
-0.07
-0.06
-0.08
-0.06
-0.10
100
-0.12
-0.08
-0.08
-0.08
-0.07
-0.06
-0.08
-0.06
-0.10
126
-0.12
-0.08
-0.08
-0.08
-0.07
-0.06
-0.08
-0.06
-0.10
159
-0.12
-0.08
-0.08
-0.08
-0.07
-0.06
-0.08
-0.06
-0.10
200
-0.15
-0.10
-0.10
-0.10
-0.08
-0.07
-0.10
-0.08
-0.12
251
-0.15
-0.10
-0.10
-0.10
-0.08
-0.07
-0.10
-0.08
-0.12
316
-0.07
-0.10
-0.12
-0.05
-0.10
-0.07
-0.12
-0.10
-0.13
398
-0.13
-0.10
-0.05
-0.10
-0.10
-0.10
-0.08
-0.08
-0.13
501
-0.10
-0.10
-0.13
-0.10
-0.10
-0.12
-0.18
-0.10
-0.08
631
-0.08
-0.10
-0.12
-0.02
-0.05
-0.10
-0.10
-0.05
0.00
794
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1000
0.00
0.00
0.00
0.00
0.07
0.10
0.10
0.00
0.02
TABLE B.3
Directional Response (from 0° to 90°) of 3 ½-inch Windscreen (Continued)
Frequency (Hz)
Angle from Reference Direction (Degrees)
1
0°
10°
20°
30°
40°
50°
60°
70°
80°
90°
