The IEPE microphone MI17 is a free-field microphone with integrated electronics that is frequently utilized in scientific research applications.
To provide optimal accuracy, the microphone is supplied with tight tolerances of ±0.5 dB and has a transmission factor of 50 mV/Pa.
The standard IEPE constant current source is set to 4 mA.
Coaxial cables are used as feed lines, and the standard microphone configuration includes BNC connectors, which are also optionally available as TNC variants.
MI17
Ideal Applications include the measurement of:
- Product noise
- Environmental noise
- Acoustic modes
- Sound power
1/4″ Microphone Class 1
Technical data: | |
|---|---|
Transducer type | Capacitive pressure transducer |
Class 1 free-field | according to IEC 61672-1 |
Polar pattern | Omni |
Frequency range | 20 Hz – 20 kHz |
Sensitivity @ 1 kHz | 50 mV/Pa ± 0.5 dB |
Max. SPL for 1% THD at 1 kHz | 130 dB Peak |
Inherent noise | 30 dB(A) |
Output impedance | <50 Ohm |
Current consumption | 2-6 mA |
Power supply | 18 V DC to 30 V DC |
Bias: | 12.5 Volt |
Temperature range, operation | -20°C to +80°C |
Heat resistant | up to 110 °C |
Diameter | 7 mm ± 0.05 mm |
Length | 93 mm |
Weight | 23 g |
Connector | BNC (fem.) |
Identical MI17 models
- AVM MI 17
- FALM MF172
- STAC MC20
- MC230
- Klippel MI-17
serves as a dust, water and EMC barrier.
MI17SW Splash Proof IP55
The MI17SW microphone is designed with splash water protection so that it can be used for measurement campaigns in wet or humid weather.
A water-repellent sealing of the membrane at the sound inlet, prevents the damage of the electret capsule by water.
The IEPE microphones with splash water protection, also MI21 and RG-50SW, have proven themselves, among others, at brake manufacturers, who mount the microphone in the wheel housing to record disturbing brake noises.
