SoundAdvisor Model 831C
A-34
FIGURE A-38
Model 831 with 377C20 Microphone
A.7.3 Random Incidence
Normalized to 1 kHz at 0 degrees.
FIGURE A-39
Random Incidence
-26
-22
-18
-14
-10
-6
-2
2
0°
10°
20°
30°
40°
50°
60°
70°
80°
90°
100°
110°
120°
130°
140°
150°
160°
170°
180°
190°
200°
210°
220°
230°
240°
250°
260°
270°
280°
290°
300°
310°
320°
330°
340°
350°
251
316
398
501
631
794
1000
1259
1585
1995
2512
3162
3981
5012
6310
7943
10000
12589
15849
19953
Frequency
(Hz)
-14
-12
-10
-8
-6
-4
-2
0
2
10
0
10
00
10
000
Decibels
(dB
re 1000 Hz)
Frequency (Hz)
Randomized
