BRUEL & KJAER 2203 - Frequency Response; One-Inch Microphone Type 4145; Half-Inch Microphone Type 4133; Specifications

8. SPECIFICATIONS
Specifications refer to 2203 with extension rod and one-inch Micro-
phone Type 4145 unless otherwise stated.
8.1. FREQUENCY RESPONSE
One-inch Microphone Type 4145
Zero incidence response (free field):
Linear:
Sensitivity:
Temperature Coefficient:
Temperature Range:
Long
Term Stability:
1 0 Hz to 1 5 kHz ± 1 dB
1
0 Hz to 1 8 kHz ± 2 dB
approx.
50 mV per Pa*
< ± 0,006 dB/°C
-50 to 150°C
± 0,1 dB plus < 0,1 dB per 1 0 years at
operating temperature below 35°C.
At 1 00°C, typically + 0,2 dB per 100
hours.
Half-inch Microphone Type 4133
Zero incidence response (free field):
Linear:
Sensitivity:
Temperature Coefficient:
10Hz to 30kHz ± 1 dB
1
0 Hz to 40 kHz ± 2 dB
12,5 mV per Pa*
< 0,006 dB/°C
Individual calibration charts are supplied with every Microphone.
* 1 Pa = 1 N/m
2
= 10J,~bar
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