TYPE 4189-L-001

1/2" Free-field Microphone With Type 2669-L Preamplifier, Prepolarized

Free-field microphone designed for high-precision measurements, requiring high sensitivity with a frequency response of 6 Hz to 20 kHz.

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Type 4189-L-001 is designed for high precision free field measurements, where a microphone with high sensitivity is required.

USE SCENARIOS

  • Precision sound measurement
  • Premium class sound level meters
  • Equipment according to IEC 61672 class 1

THIS MICROPHONE SET IS A COMBINATION OF:

The unit is mounted in a clean, sealed room environment, after which a single type number and a single serial number are assigned. This means that the combined unit has better accuracy and long-term stability and is treated as a complete unit.

The unit also contains TEDS, which means that information about the serial number, type and sensitivity is stored in it.

THE BENEFITS OF USING A MICROPHONE PREAMPLIFIER COMBINATION ARE:

  • Better stability and accuracy. Because the unit is mounted in clean room installations, there is no contamination.
  • Easy to use. Your front-end analyzer and software will automatically detect the type number, serial number and sensitivity because of the built-in TEDS technology. There is no need to enter this manually for all channels.
  • Calibration integration. TEDS technology means that the microphone is automatically detected and identified by your data acquisition software, allowing it to be easily integrated into your calibration database.
  • Fewer errors. Since your data acquisition software automatically knows the type of microphone, serial number and sensitivity, manual inputs are greatly reduced - reducing human errors.
Capacitance
pF
Diameter
1/2
Dynamic range
15.2 – 146 dB
Frequency range
6.3 – 20000 Hz
Inherent noise
15.2 dB A
Lower limiting frequency -3dB
6.3 Hz
Optimised
Free field
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.01 dB/kPa
Sensitivity
50 mV/Pa
Standards
IEC 61094-4 WS2F
Temperature coefficient
-0.006 db/ºC
Temperature range
-20 – 80 C
Venting
Rear
Weight
gram
Sound field
Free-field
Input type
Classic
Microphone type
Free field