FIGURE A-39
Model 831C with 377B02 Microphone
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FIGURE A-40
Model 831C with 377B02 Microphone
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SoundAdvisor Model 831C
Frequency (Hz)
Frequency (Hz)
Mic at n°
20°
340°
60°
300°
100°
260°
140°
220°
180°
Mic at n°
40°
320°
80°
280°
120°
240°
160°
200°
A-46
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