ICP Microphone

ICP Microphone – IEPE Microphone

ICP – IEPE microphones including factory calibration certificate and 24 months warranty.

IEPE Microphone MI19

20 Hz to 30 kHz

Measurement Microphone Set

MI19 + Plug.n.DAQ Lite

10 volt measuring range, sound pressure level and microphone sensitivity.

A typical 1/2″ measurement microphone delivers a voltage of 50 mV at 1 Pascal. 1 Pascal corresponds to a sound pressure level of 94 dB. 94 dB is already very unpleasant for humans and is only tolerated in rare situations.

During a normal conversation, the sound pressure level is below 74 dB, i.e., 20 dB lower. 20 dB quieter is a factor of 10 quieter.

This means that at 74 dB, the microphone only delivers 5 mV.

Assuming that end-of-line testing involves acoustically testing parts in a soundproof test chamber, it can be assumed that the measurement microphone delivers only a few microvolts.

Low Noie IEPE Microphone USB DAQ

The choice of the input measurement range for the measurement data acquisition is therefore crucial. Assuming that the measurement card has a measurement range of 10,000 mV and the measurement microphone is exposed to a sound pressure level of 74 dB, which delivers 5 mV, the 10,000 mV measurement range is significantly too coarse for this application.

The difference becomes even more apparent when you consider that verbal interaction is reduced in the office. At a sound pressure level of 54 dB, the voltage detected by the measurement microphone is 0.5 mV.

The comparison scenario with a scale with a 10,000 kg measurement range illustrates that weighing a 0.5 kg object is associated with a high degree of inaccuracy.

Our solution for this application is the PnDL-100 with an input measurement range of 100 mV, which delivers an acoustic measurement range of 13 to 97 dB(A).

MNP47

The MNP47 1/4″ measurement microphone opens the possibility of using a high-quality, pre-polarized ¼” pressure field measurement microphone capsule on measurement systems with IEPE supply.

Typical applications are measurements of high sound pressure levels e.g. in the defense industry or development of rocket engines or noise measurement in high voltage arc experiments.

The measuring microphone is connected to the measuring channels via a fixed SMB connector with SMB cables or usual BNC cables via a SMB-BNC adapter.

1/4″ microphone
4 mV/Pa
Class 1 according to IEC 61094-4 WS3P
Pressure field
10Hz to 20kHz
35 dBA to 164 dB
Factory calibration certificate

PCB 130A10

1/4″ microphone
30 mV/Pa
Class 1 according to IEC 61672
Free field
10Hz to 20kHz
26dBA to 135dB
Factory calibration certificate

ICP is a registered trademark of PCB Piezotronics, Inc., DeltaTron is a registered trademark of Hottinger Brüel & Kjær A/S, ISOTRON is a registered trademark of ENDEVCO.

This document only describes the technical principles involved and inevitably mentions the registered trademarks of other manufacturers, which is not intended and will not harm the interests of trademark owners. The registered trademarks mentioned above belong to their respective owners.

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