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Measurement Microphone MMS 214

The MMS 214 has a particularly low inherent noise and is designed for acoustic measurements of very low sound pressure levels.


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The electrical connection is made via BNC cable to measuring channels with IEPE supply. The polarization voltage for the externally polarized measurement microphone capsule is generated in the measurement microphone preamplifier. The measurement microphone is equipped with a built-in memory for microphone identification (TEDS according to IEEE 1451).


  • free field
  • 10Hz to 20kHz
  • 6.5dBA to 100dB
  • IEPE (BNC)
  • Microphone supply: IEPE
  • TEDS according to IEEE 1451



Converter typeCapacitive pressure transducer
Frequency range of the free field transmission factor±2dB10Hz to 16kHz
±3dB5Hz to 20kHz
Operational Transmission Coefficient320 mV/Pa
Operating transmission ratio re 1 V/Pa-10dB ±2.5dB
Limit sound pressure level for 3% distortion factor at 1kHzPeaks103dB
Intrinsic noise6.5dBA
Output impedance<100 ohms
Operating current4mA to 20mA
No-load voltage of the power supply24VDC to 30VDC
working temperature range-20ºC to +60ºC
Temperature coefficient at 250 Hz≥0.01dB/K
Static pressure coefficient at 250 Hz-0.00001dB/Pa
Temperature limits-50°C to +100°C
Humidity limitsrH <100%, no condensation allowed
Diameterwithout protective cap12.7mm ± 0.05mm
with protective cap13.2mm ± 0.05mm
Weight250 g
Microphone identification memory256-bit 1-WireTM EEPROM (DS 2430 AP)


R&D and Production

Centralising data collation and analysis across multiple production sites is also possible as expectation of remote access to acquisition systems becomes the norm

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