BRUEL & KJAER 4188 - Specifications Overview; Ordering Information

Chapter 4 — Free-field
1
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2
" Microphone Type 4190
Electromagnetic Compatibility
Falcon™ Range of Microphone Products
Microphone Handbook
Brüel & Kjær
4
−
28
4.16 Electromagnetic Compatibility
See Chapter 8.
4.17 Specifications Overview
4.18 Ordering Information
Preamplifier
Type 2669:
1
/
2
" Microphone Preamplifier
Calibration Equipment
Type 4231: Sound Level Calibrator
Type 4226: Multifunction Acoustic Calibrator
Type 4228: Pistonphone
UA0033: Electrostatic Actuator
OPEN-CIRCUIT SENSITIVITY (250Hz)*:
–26dB
±
1.5 dB re 1V/Pa, 50mV/Pa*
POLARIZATION VOLTAGE:
External: 200 V
FREQUENCY RESPONSE*:
0° incidence free-field response:
5Hz to 10kHz:
±
1dB
3.15Hz to 20kHz:
±
2dB
In accordance with IEC 651, Type 0 and Type 1
LOWER LIMITING FREQUENCY (–3 dB):
1Hz to 2Hz (vent exposed to sound)
PRESSURE EQUALIZATION VENT:
Rear vented
DIAPHRAGM RESONANCE FREQUENCY:
14kHz, typical (90
°
phase shift)
CAPACITANCE (POLARIZED)*:
16pF, typical (at 250 Hz)
EQUIVALENT AIR VOLUME (101.3 kPa):
46 mm
3
*
Individually calibrated
CALIBRATOR LOAD VOLUME (250Hz):
250 mm
3
PISTONPHONE TYPE 4228 CORRECTION:
with DP 0776:
0.00 dB
TYPICAL CARTRIDGE THERMAL NOISE:
14.6dB (A) 15.3 dB (Lin.)
UPPER LIMIT OF DYNAMIC RANGE:
3% distortion:
>148 dB SPL
MAXIMUM SOUND PRESSURE LEVEL:
159 dB (peak)
OPERATING TEMPERATURE RANGE:
–30 to +150
°
C (–22 to 302
°
F)
can be used up to +300
°
C (572
°
F) but with a
permanent sensitivity change of typically +0.4dB
which stabilises after one hour
OPERATING HUMIDITY RANGE:
0 to 100 % RH (without condensation)
STORAGE TEMPERATURE:
–30 to +70
°
C (–22 to 158
°
F)
TEMPERATURE COEFFICIENT (250Hz):
–0.007 dB/
°
C, typical (for the range –10 to
+50
°
C)
PRESSURE COEFFICIENT (250Hz):
–0.010 dB/kPa, typical
INFLUENCE OF HUMIDITY:
<0.1 dB/100 %RH
VIBRATION SENSITIVITY (<1000 Hz):
Typically 62.5dB equivalent SPL for 1m/s
2
axial
acceleration
MAGNETIC FIELD SENSITIVITY:
Typically 4dB SPL for 80 A/m, 50Hz field
ESTIMATED LONG-TERM STABILITY:
>1 000 years/dB at 20
°
C
>1 00 hours/dB at 150
°
C
DIMENSIONS:
Diameter
: 13.2 mm (0.52 in) (with grid)
12.7 mm (0.50 in) (without grid)
Height
: 17.6 mm (0.68 in) (with grid)
16.3 mm (0.64 in) (without grid)
Thread for preamplifier mounting
: 11.7mm –
60 UNS
The data above are valid at 23
°
C, 101.3kPa and
50%RH, unless otherwise specified.