BRUEL & KJAER 4188 - Specifications Overview; Ordering Information

Chapter 2 — Prepolarized Free-field
1
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2
" Microphone Type 4188
Specifications Overview
Falcon™ Range of Microphone Products
Microphone Handbook
Brüel & Kjær
2
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28
2.17 Specifications Overview
2.18 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 (1000 Hz)*:
–30dB
±
2dB re 1V/Pa, 31.6mV/Pa*
POLARIZATION VOLTAGE:
External: 0 V
FREQUENCY RESPONSE:
0° incidence free-field response:
12.5 Hz to 8kHz:
±
1dB
8Hz to 12.5kHz:
±
2dB
In accordance with IEC 651, Type 1 and ANSI
S1.4 – 1983
LOWER LIMITING FREQUENCY (–3 dB):
1Hz to 5Hz (vent exposed to sound)
PRESSURE EQUALIZATION VENT:
Rear vented
DIAPHRAGM RESONANCE FREQUENCY:
9kHz, typical (90
°
phase shift)
CAPACITANCE (POLARIZED):
12pF, typical (at 1000 Hz)
EQUIVALENT AIR VOLUME (101.3 kPa):
65 mm
3
*
Individually calibrated
CALIBRATOR LOAD VOLUME (250Hz):
208 mm
3
PISTONPHONE TYPE 4228 CORRECTION:
with DP 0776:
+0.02 dB
TYPICAL CARTRIDGE THERMAL NOISE:
14.2dB (A) 14.5 dB (Lin.)
UPPER LIMIT OF DYNAMIC RANGE:
3% distortion:
>146 dB SPL
MAXIMUM SOUND PRESSURE LEVEL:
157 dB (peak)
OPERATING TEMPERATURE RANGE:
–30 to +125
°
C (–22 to 257
°
F)
Max. 70
°
C (158
°
F) when fitted with Random-
incidence Corrector DZ 9566
OPERATING HUMIDITY RANGE:
0 to 100 % RH (without condensation)
STORAGE TEMPERATURE:
–30 to +70
°
C (–22 to 158
°
F)
TEMPERATURE COEFFICIENT (250Hz):
+0.005 dB/
°
C, typical (for the range –10 to
+50
°
C)
PRESSURE COEFFICIENT (250Hz):
–0.021 dB/kPa, typical
INFLUENCE OF HUMIDITY:
<0.1 dB/100 %RH
VIBRATION SENSITIVITY (<1000 Hz):
Typically 63.5dB equivalent SPL for 1m/s
2
axial
acceleration
MAGNETIC FIELD SENSITIVITY:
Typically 7dB SPL for 80 A/m, 50Hz field
ESTIMATED LONG-TERM STABILITY:
> 1000 years/dB (dry air at 20
°
C)
> 10 hours/dB (dry air at 125
°
C)
> 40 years/dB (air at 20
°
C, 90% RH)
> 6 months/dB (air at 50
°
C, 90% RH)
DIMENSIONS:
Diameter
: 13.2 mm (0.52 in) (with grid)
12.7 mm (0.50 in) (cartridge housing)
14.35 mm (0.56 in) (with DZ 9566)
Height
: 14.9 mm (0.59 in) (with grid)
14.0 mm (0.55 in) (without grid)
16.7 mm (0.66 in) (with DZ 9566)
Thread for preamplifier mounting
: 11.7mm –
60 UNS
The data above are valid at 23
°
C, 101.3kPa and
50%RH, unless otherwise specified.