FIGURE A-7
Model 831 with 377B02 Microphone
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FIGURE A-8
Model 831 with 377B02 Microphone
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SoundAdvisor Model 831C
Frequency (Hz)
Frequency (Hz)
Mic at n°
40°
80°
120°
160°
Mic at n°
10°
50°
90°
130°
170°
A-22
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