5
OPEN-CIRCUIT SENSITIVITY (1000 Hz):
–30 dB
±
2 dB re 1 V/Pa, 31.6 mV/Pa
*
POLARIZATION VOLTAGE (external): 0 V
FREQUENCY RESPONSE:
0
°
incidence free-field response:
±
1 dB, 12.5 Hz to 8 kHz
±
2 dB, 8 Hz to 12.5 kHz
In accordance with IEC 651, Type 1 and ANSI
S1.4 – 1983
LOWER LIMITING FREQUENCY (–3 dB):
1 Hz to 5 Hz (vent exposed to sound)
PRESSURE EQUALIZATION VENT:
Rear vented
DIAPHRAGM RESONANCE FREQUENCY:
9 kHz (90
°
phase shift)
CAPACITANCE (POLARIZED, 1000 Hz): 12 pF
EQUIVALENT AIR VOLUME (101.3 kPa):
65 mm
3
CALIBRATOR LOAD VOLUME (250 Hz):
208 mm
3
PISTONPHONE TYPE 4228 CORRECTION
(with DP 0776): +0.02 dB
CARTRIDGE THERMAL NOISE:
14.2 dB (A), 14.5 dB (Lin.)
* Individually calibrated
UPPER LIMIT OF DYNAMIC RANGE (3%
distortion): >146 dB SPL
MAXIMUM SOUND PRESSURE LEVEL:
157 dB (peak)
Environmental
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)
Data Disk: 5 to 50
°
C (41 to +122
°
F)
TEMPERATURE COEFFICIENT (250 Hz):
+0.005 dB/
°
C (for the range –10 to +50
°
C (14
to +122
°
F))
PRESSURE COEFFICIENT (250 Hz):
–0.021 dB/kPa
INFLUENCE OF HUMIDITY: <0.1 dB/100 %RH
VIBRATION SENSITIVITY (<1000 Hz):
63.5 dB equivalent SPL for 1 m/s
2
axial acceler-
ation
MAGNETIC FIELD SENSITIVITY:
7 dB SPL for 80 A/m, 50 Hz field
ESTIMATED LONG-TERM STABILITY:
>1000 years/dB (dry air at 20
°
C (68
°
F))
>10 hours/dB (dry air at 125
°
C (257
°
F))
>40 years/dB (air at 20
°
C (68
°
F), 90% RH)
>6 months/dB (air at 50
°
C (122
°
F), 90% RH)
Dimensions
Diameter: 13.2 mm (0.52
″
) (with grid)
12.7 mm (0.50
″
) (cartridge housing)
14.35 mm (0.56
″
) (with DZ 9566)
Height:
14.9 mm (0.59
″
) (with grid)
14.0 mm (0.55
″
) (without grid)
16.7 mm (0.66
″
) (with DZ 9566)
Thread for preamplifier mounting:
11.7 mm – 60 UNS
Note: All values are typical at 23
°
C (73.4
°
F
)
101.3 kPa and 50% RH, unless measurement
uncertainty or tolerance field is specified. All un-
certainty values are specified at 2
σ
(i.e. expand-
ed uncertainty using a coverage factor of 2)
Specifications 4188
OPEN-CIRCUIT SENSITIVITY (250 Hz):
–26 dB
±
1.5 dB re 1 V/Pa, 50 mV/Pa
*
POLARIZATION VOLTAGE (external): 0 V
FREQUENCY RESPONSE*:
0
°
incidence free-field response:
±
1 dB, 10 Hz to 8 kHz
±
2 dB, 6.3 Hz to 20 kHz
In accordance with IEC 651, Type 1
LOWER LIMITING FREQUENCY (–3 dB):
2 Hz to 4 Hz (vent exposed to sound)
PRESSURE EQUALIZATION VENT:
Rear vented
DIAPHRAGM RESONANCE FREQUENCY:
14 kHz (90
°
phase shift)
CAPACITANCE (POLARIZED, 250 Hz): 14 pF
EQUIVALENT AIR VOLUME (101.3 kPa):
46 mm
3
CALIBRATOR LOAD VOLUME (250 Hz):
260 mm
3
PISTONPHONE TYPE 4228 CORRECTION
(with DP 0776): 0.00 dB
CARTRIDGE THERMAL NOISE:
14.6 dB (A), 15.3 dB (Lin.)
* Individually calibrated
UPPER LIMIT OF DYNAMIC RANGE (3%
distortion): >146 dB SPL
MAXIMUM SOUND PRESSURE LEVEL:
158 dB (peak)
Environmental
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)
Data Disk: 5 to 50
°
C (41 to +122
°
F)
TEMPERATURE COEFFICIENT (250 Hz):
–0.001 dB/
°
C (for the range –10 to +50
°
C (14
to 122
°
F))
PRESSURE COEFFICIENT (250 Hz):
–0.010 dB/kPa
INFLUENCE OF HUMIDITY:
<0.1 dB/100 %RH
VIBRATION SENSITIVITY (<1000 Hz):
62.5 dB equivalent SPL for 1 m/s
2
axial acceler-
ation
MAGNETIC FIELD SENSITIVITY:
6 dB SPL for 80 A/m, 50 Hz field
ESTIMATED LONG-TERM STABILITY:
>1000 years/dB (dry air at 20
°
C (68
°
F))
>2 hours/dB (dry air at 150
°
C (302
°
F))
>40 years/dB (air at 20
°
C (68
°
F), 90% RH)
>1 year/dB (air at 50
°
C (122
°
F), 90% RH)
Dimensions
Diameter: 13.2 mm (0.52
″
) (with grid)
12.7 mm (0.50
″
) (without grid)
Height:
17.6 mm (0.69
″
) (with grid)
16.3 mm (0.64
″
) (without grid)
Thread for preamplifier mounting:
11.7 mm – 60 UNS
Note: All values are typical at 23
°
C (73.4
°
F
)
101.3 kPa and 50% RH, unless measurement
uncertainty or tolerance field is specified. All un-
certainty values are specified at 2
σ
(i.e. expand-
ed uncertainty using a coverage factor of 2)
Specifications 4189
Ordering Information 4188
Type 4188
Prepolarized Free-field
1
/
2
″
Microphone
Includes the following accessories:
DZ 9566:
Random-incidence Corrector
BC 0211:
Calibration Chart
*
*
Quote mic. serial number when re-ordering
Optional Accessories
Type 2669:
1
/
2
″
Microphone Preamplifier
Type 4231:
Sound Level Calibrator
Type 4226:
Multifunction Acoustic Calibrator
Type 4228:
Pistonphone
UA 0308:
Dehumidifier
UA 0254:
Set of 6 Windscreens (UA 0237),
90 mm (3.5
″
)
UA 0469:
Set of 6 Windscreens (UA 0459),
65 mm (2.6
″
)
BA 5105:
Microphone Handbook
Ordering Information 4189
Type 4189
Prepolarized Free-field
1
/
2
″
Microphone
Includes the following accessories:
BC 0224:
Calibration Chart
*
*
Quote mic. serial number when re-ordering
BC 5002:
Microphone-data Disk*
Optional Accessories
Type 2669:
1
/
2
″
Microphone Preamplifier
Type 4231:
Sound Level Calibrator
Type 4226:
Multifunction Acoustic Calibrator
Type 4228:
Pistonphone
UA 0308:
Dehumidifier
UA 0254:
Set of 6 Windscreens (UA 0237),
90 mm (3.5
″
)
UA 0469:
Set of 6 Windscreens (UA 0459),
65 mm (2.6
″
)
BA 5105:
Microphone Handbook
