TYPE 4191-B-001

½-inch free-field microphone with Type 2669-B preamplifier, 3 Hz to 40 kHz, 200 V polarization

Designed for all high-precision electro-acoustic measurements and general acoustic measurements where a robust and stable free-field microphone is required.

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Type 4191-B-001 is designed for high-precision, free-field measurements where a wide bandwidth is required.

USE SCENARIOS

  • Precision measurements to 40 kHz
  • Premium class sound level meters
  • Equipment complying with IEC 61672 class 1

THIS MICROPHONE IS A FACTORY-ASSEMBLED COMBINATION OF:

The unit is assembled in a clean-room environment and sealed together, after which it is assigned one single type number and one single serial number. This means that the combined unit has better precision and long-time stability, and is handled as one complete unit.

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


THE BENEFITS OF USING A MICROPHONE-PREAMPLIFIER COMBINATION ARE:

  • Better stability and precision. Because the unit is assembled in clean-room facilities, there is no contamination.
  • Ease of use. Your analyzer front-end 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 every channel. 
  • Calibration integration. The TEDS technology means the microphone is automatically detected and identified by your data acquisition software, allowing it to be easily integrated with your calibration database.
  • Fewer errors. As your data acquisition software automatically knows the microphone type, serial number and sensitivity, manual inputs are greatly reduced – reducing human errors.
Capacitance
pF
Diameter
1/2
Dynamic range
21.4 – 162 dB
Frequency range
3.15 – 40000 Hz
Inherent noise
21.4 dB A
Lower limiting frequency -3dB
3.15 Hz
Optimised
Free field
Polarization
Ext polarized
Polarization voltages
200 V
Pressure coefficient
-0.007 dB/kPa
Sensitivity
12.5 mV/Pa
Standards
IEC 61094-4 WS2F
Temperature coefficient
-0.002 db/ºC
Temperature range
-20 – 80 C
Venting
Side
Weight
gram
Sound field
Free-field
Input type
Classic
Microphone type
Free field