
CHAPTER 4
Specifications
31
Fig.4.17 Sensitivity variations of Hand-held Analyzer Type 2250 (including Microphone Type 4189) at sound
incidence angles within
±
θ
°
from the reference direction, see Table A.26. 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 31 Thursday, May 27, 2004 1:01 PM
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