
Hand-held Analyzer Type 2250 –
Instruction Manual
28
Fig.4.14 Sensitivity variations of Microphone Type 4189 (only) at sound incidence angles within
±
θ
°
from the
reference direction. See Table A.13. Reduced IEC 61672–1 limits are also drawn on the graph
± 150°
0
5
10
15
20
dB
100 1000 10000
Hz
± 90°
0
5
10
15
20
dB
100 1000 10000
Hz
± 30°
0
5
10
15
20
dB
100 1000 10000
Hz
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BE171211.book Page 28 Thursday, May 27, 2004 1:01 PM
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