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Measurement Microphone MM 215

The 1/2 ”measuring microphone MM 215 opens up the possibility of using high quality, pre-polarized measuring microphone capsule MK 255 on measuring systems with IEPE supply. Array arrangements and envelope surface measurement methods, for example in motor vehicle acoustics, come into consideration as typical applications.



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The electrical connection is made via the permanently attached BNC connector with standard BNC cables. The preamplifier is equipped with a built-in memory for microphone identification, with which microphone data can be written and read by the manufacturer/user (IEEE P1451.4 TEDS editor).

We recommend the MH 64 microphone holder with a 1/2 ”clamp to hold the microphone. The use of the 1/2 ”measuring microphone capsule accessories such as windshield, nose cone, dry adapter etc. is possible without any problems.

The measurement microphone can be calibrated with the Pistonfon Type 5002 or with other suitable sound pressure calibrators.

Transducer typeCapacitive pressure transducer, acc. WS2F (DIN EN IEC 61094-4)
Sensitivity50 mV/Pa
Sensitivity-26 dB ±1,5 dB re 1V/Pa
Correction free-field at 1 kHz0 dB
Random incidence at 1 kHz0 dB
Principal axismicrophone axis
3,5 Hz to 20 kHz
Polarization voltage0 V
Max. SPL for 3% THD at 1 kHz135 dB
Max. SPL130 dB
Output voltage≤ 6,5 Veff
Output impedance< 100 Ohm
Nom. load impedance100 kOhm
Current consumption2 mA to 10 mA, nom. 4 mA
Transducer excitation voltageUL 24 V DC to 30 V DC
Time for power up1 min.
Equivalent loudness level DIN EN 6065115 dBA
Influence of magnetic field 80 A/m, 50 Hz< 22 dB
Influence of vibration 1 m/s²60 dB (20 Hz bis 1 kHz)
Operating temperature range ˂± 0,5 dB-25 °C to +100 °C
Main ambient temperature coefficient≤ 0,01 dB/K
Main ambient pressure coefficient1×10-5 dB/Pa
Temperature limits-50 °C to +100 °C
Humidity limitsr.H. < 100%, absence of condensation
Diameterwith protection grid13,2 + 0,05 mm
without protection grid12,7 + 0,05 mm
Length97 mm (incl. connector)
Weight45 g
Preamplifier thread11,7 mm 60 UNS
Protection grid thread12,7 mm 60 UNS
Microphone identification memory256-Bit 1-WireTM EEPROM (DS 2430 AP)



MM 215 Measurement Microphone

Exceptional performance, build quality and stability means it can be used in a wide variety of applications

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