The IEPE microphone MI17 is a free-field microphone with integrated electronics that is often used in scientific research.
To ensure accuracy, the microphone is supplied with tight tolerances of ±0.5 dB and has a transmission factor of 50 mV/Pa.
An IEPE constant current source is used as standard, which is usually 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 | Electrete pressure transducer |
Class 1 | WS3F according to IEC 61094-5 |
Polar pattern | Omni |
Frequency range | 20 Hz – 20 kHz (meets Type 1 free field limits) |
Sensitivity @ 1 kHz | 50 mV/Pa ± 0.5 dB |
Max. SPL for 1% THD at 1 kHz | 130 dB Peak |
Inherent noise | 26 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
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.
