11 Technical features
11.1 Microphone
The instrument is equipped with an electret microphone with an integrated preamplifier of standardized diameter of ½ inch. Fixed at
the top of the sound level meter, it gives to the group (microphone and housing) free field features compatible with standards.
11.1.1 Sheet
• Marque : KIMO
• Type : Prepolarized free-field ½''
• Grig diameter: 13.2 mm
• Preamplifier : integrated
• Power : 15 V DC
• Nominale sensitivity for preamplifier output : 50mV/Pa
• Equivalent capacity : about 10pF
11.1.2 Frequency response type – reference direction of the sound level meter
11.2 Windscreen
B-DB23 windscreen creates modifications of free field response that comes in addition to initial features of the microphone on the
housing. The whole stays compliant to requirements class 2 reference standard. So, when using the windscreen, there is no need to
take into account a correction term free field.
Technical features 30
B-DB23 free field response –
template class 2 NF EN 61672-1
Free field response microphone type +
B-DB23 – template class 2 EN NF 61672-1
dB
dB
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