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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For more information on Measurement Microphone MM 215 or to request a quote, contact our team now:
Request a QuoteContact usThe 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 type | Capacitive pressure transducer, acc. WS2F (DIN EN IEC 61094-4) | |
| Sensitivity | 50 mV/Pa | |
| Sensitivity | -26 dB ±1,5 dB re 1V/Pa | |
| Correction free-field at 1 kHz | 0 dB | |
| Random incidence at 1 kHz | 0 dB | |
| Principal axis | microphone axis | |
| 3,5 Hz to 20 kHz | ||
| Polarization voltage | 0 V | |
| Max. SPL for 3% THD at 1 kHz | 135 dB | |
| Max. SPL | 130 dB | |
| Output voltage | ≤ 6,5 Veff | |
| Output impedance | < 100 Ohm | |
| Nom. load impedance | 100 kOhm | |
| Current consumption | 2 mA to 10 mA, nom. 4 mA | |
| Transducer excitation voltage | UL 24 V DC to 30 V DC | |
| Time for power up | 1 min. | |
| Equivalent loudness level DIN EN 60651 | 15 dBA | |
| Influence of magnetic field 80 A/m, 50 Hz | < 22 dB | |
| Influence of vibration 1 m/s² | 60 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 coefficient | 1×10-5 dB/Pa | |
| Temperature limits | -50 °C to +100 °C | |
| Humidity limits | r.H. < 100%, absence of condensation | |
| Diameter | with protection grid | 13,2 + 0,05 mm |
| without protection grid | 12,7 + 0,05 mm | |
| Length | 97 mm (incl. connector) | |
| Weight | 45 g | |
| Preamplifier thread | 11,7 mm 60 UNS | |
| Protection grid thread | 12,7 mm 60 UNS | |
| Plug | BNC | |
| Microphone identification memory | 256-Bit 1-WireTM EEPROM (DS 2430 AP) | |
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