BRUEL & KJAER 4188 - Specifications Overview; Ordering Information

Chapter 3 — Prepolarized Free-field
1
/
2
" Microphone Type 4189
Specifications Overview
Falcon™ Range of Microphone Products
Microphone Handbook
Brüel & Kjær
3
−
28
3.17 Specifications Overview
3.18 Ordering Information
Preamplifier
Type 2669:
1
/
2
" Microphone Preamplifier
Type 2671:
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: 0 V
FREQUENCY RESPONSE*:
0° incidence free-field response:
10 Hz to 8kHz:
±
1dB
6.3Hz to 20kHz:
±
2dB
In accordance with IEC651, Type 1
LOWER LIMITING FREQUENCY (–3 dB):
2Hz to 4Hz (vent exposed to sound)
PRESSURE EQUALIZATION VENT:
Rear vented
DIAPHRAGM RESONANCE FREQUENCY:
14kHz, typical (90
°
phase shift)
CAPACITANCE (POLARIZED:
14pF, typical (at 250 Hz)
EQUIVALENT AIR VOLUME (101.3 kPa):
46 mm
3
*
Individually calibrated
CALIBRATOR LOAD VOLUME (250Hz):
260 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:
>146 dB SPL
MAXIMUM SOUND PRESSURE LEVEL:
158 dB (peak)
OPERATING TEMPERATURE RANGE:
–30 to +150
°
C (–22 to 302
°
F)
OPERATING HUMIDITY RANGE:
0 to 100 % RH (without condensation)
STORAGE TEMPERATURE:
–30 to +70
°
C (–22 to 158
°
F)
TEMPERATURE COEFFICIENT (250Hz):
–0.001 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 6dB SPL for 80 A/m, 50Hz field
ESTIMATED LONG-TERM STABILITY:
> 1000 years/dB (dry air at 20
°
C)
> 2 hours/dB (dry air at 150
°
C)
> 40 years/dB (air at 20
°
C, 90% RH)
> 1 year/dB (air at 50
°
C, 90% RH)
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.