Microphone & PreAmplifier Combinations
Type 4188-A-021 ½-Inch Free-Field Microphone With Type 2671 Preamplifier, 20 HZ TO 12.5 KHZ, Prepolarized
Type 4188-A-021 is designed for free-field measurements where an economy microphone with medium sensitivity is required.
USE SCENARIOS
- Medium class sound level meters
- Equipment complying with IEC 61672 class 1
- Random-incidence measurements
- Portable sound measuring equipment
THIS MICROPHONE IS A FACTORY-ASSEMBLED COMBINATION OF:
- Microphone: Type 4188
- Preamplifier: Type 2671
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: 19 – 138 dB
Frequency range: 20 – 12500 Hz
Inherent noise: 19 dB A
Lower limiting frequency -3dB: 12 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 C
Venting: Rear
Weight: gram
Sound field: Free-field
Input type: CCLD IEPE
Microphone type: Free field
