B&K 2250 Light Manual do Utilizador Página 28

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CHAPTER 4
Specifications
23
Fig.4.5 Influence of Hand-held Analyzer body on free-field response for Hand-held Analyzer Type 2250 (including
Microphone Type 4189) with the sound field at 0
°
angle of incidence to the microphone. Reduced
IEC 61672–1 limits are also drawn on the graph.
Fig.4.6 Free-field frequency response of Hand-held Analyzer Type 2250 (including Microphone Type 4189) and
sound field at 0
°
angle of incidence to the microphone. Sound Field Correction parameter set to ‘Free-field’
and the Windscreen Correction parameter set to ‘None’, see Table A.3 Reduced IEC 61672–1 limits are
also drawn on the graph..
Fig.4.7 Free-field frequency response of Microphone Type 4189 only, with Windscreen UA 1650 fitted and sound
field at 0
°
angle of incidence to the microphone. Sound Field Correction parameter set to ‘Free-field’ and
the Windscreen Correction parameter set to ‘Auto Detect’ or ‘UA 1650’, see Table A.4. Reduced
IEC 61672–1 limits are also drawn on the graph ]
-4
-2
0
2
4
dB
100 1000 10000
Hz
040164
-4
-2
0
2
4
dB
100 1000 10000
Hz
040165
-4
-2
0
2
4
dB
100 1000 10000
Hz
040167
BE171211.book Page 23 Thursday, May 27, 2004 1:01 PM
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