The calibrated MI19 microphone is suitable for all technical acoustic measurements, such as the recording of machine noise, sound measurements on test benches, use in impedance tubes, noise measurements and use as an acoustic camera.
The IEPE microphones MI19 and MI19SW belong to the category of free-field microphones with integrated electronics and are widely used in industrial acoustics and scientific research.
With a sensitivity of 50 mV/Pa, the 1/4“ microphone has a high sensitivity compared to other 1/4” measurement microphones.
The MI19SW version is IP55 splash-proof and is suitable for temporary outdoor use.
Coaxial cables are used as feed lines and the standard configuration of the microphone includes BNC connectors, which are also available as TNC variants. The microphone can be used with any device that has a power supply compatible with the IEPE standard.
MI19
- Price: 325 €
Class 1 free-field | in accordance with IEC 61672 |
|---|---|
Transducer type | Electrete pressure transducer |
Diameter | 1/4″ |
Polar pattern | Omni |
Frequency range | 20 Hz – 30 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 | 83 mm 1/4″ sleeve diameter over the entire length |
Weight | 19 g |
Connector | BNC (fem.) |
MI19SW
- Price: 455 €
IP55 splash water resistant
The 19SW microphone has been designed to be IP55 splash water resistant.
The microphone is therefore suitable for use in measurement campaigns in wet and damp weather conditions.
An IP55 water-repellent seal on the membrane at the sound inlet prevents potential damage to the electret capsule caused by water.
The IEPE microphone is suitable for use in standard industrial environments and for all noise measurements with a sound pressure level of up to 130 dB.
Calibration is possible with a commercially available microphone calibrator and a 1/2″ to 1/4″ adapter.
The MI19 microphones are equipped with a BNC socket so that standard BNC cables can be used.
A TNC plug version is also available on request.
In the following, I would like to present the self-noise of four microphone models, including two 1/2‘ microphones and two 1/4’ microphones.
Following microphones were used for the measurements:
