TYPE 4188-B-001

½-inch Free-field Microphone With Type 2669-B Preamplifier, Prepolarized

Economic Free-field microphone for transport noise measurements, architectural acoustics and electroacoustics with a frequency response of 8 Hz to 12.5 kHz

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Type 4188-B-001 is a pressure-field microphone set designed for free-field measurements, where an economy microphone with medium sensitivity is required.

USE SCENARIOS

  • Medium class sound level meter microphone
  • Equipment complying with IEC 61672 class 1
  • Random-incidence measurements
  • Portable sound measuring equipment

THIS MICROPHONE SET IS A COMBINATION OF:

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

BENEFITS OF USING A TEDS MICROPHONE SET:

  • 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
Dyn. range
15.8 – 146 dB
Freq. range
8 – 12500 Hz
Inherent noise
15.8 dB A
Lower limiting frequency -3dB
8 Hz
Optimised
Free field
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.021 dB/kPa
Sensitivity
31.6 mV/Pa
Temperature coefficient
0.005 dB/ºC
Temperature range
-30 – 100 ℃
Venting
Rear
Weight
gram
Sound field
Free-field
Input type
Classic
Microphone type
Free field