BRUEL & KJAER 2209 - Specifications; Frequency Response

8. SPECIFICATIONS
Specifications for sound measurements refer to the meter with input
stage, flexible extension rod and 1 inch microphone 4145 unless otherwise
stated.
8.1. FREQUENCY RESPONSE
(see also Fig.4.9 for low frequency responses)
One inch microphone Type 4145
Linear
Sensitivity
Temperature Coefficient:
Temperature
Range:
Long Term Stability:
Half inch microphone Type 4133
Linear
Sensitivity:
Temperature Coefficient:
6- 4.000 Hz
4- 12.000 Hz
3- 18.000 Hz
±0.5 dB
± 1 dB
+
1
dB
-1.5
approx. 50 mV per Nfm2
<± 0.006 dB/°C
-50 to 150°C
± 0.1 dB plus<+ 0.1 dB per 10 years at
operating temperature below
35°C. At
100°C typically+ 0.2 dB per 100 hours.
10- 8.000 Hz
6-20.000 Hz
4-40.000 Hz
±0.5 dB
± 1 dB
±2 dB
approx.
10 mV per Nfm2
<±0.006 dB/°C
Individual calibration charts are supplied with every microphone.
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