PMP25 Random Incidence Microphone

Random Incidence Microphone PMP25

The PMP25 is 1/2” prepolarized diffuse-field measurement microphone. It is for general purpose acoustic measurements, diffuse fields and inside vehicles.
All the microphones are going through solid environmental testing, which includes high temperature ageing and high humidity ageing.

Frequency Response Diffuse –Field
Open Circuit Sensitivity 50mV/Pa
Equivalent Noise Level < 16 dB(A)
T.H.D. < 3% at 146dB SPL
Polarization Voltage 0 V
Capacitance 16.0 pF
Equivalent Air Volume 230 mm3 at 250 Hz.
Diaphragm Resonance Frequency 14 kHz.
Pressure Vent Rear
Operating Temperature Range -30°C ~ 90°C

Download PLACID PMP25 Microphone Datasheet


PLACID PMP25 Random Incidence Microphone



The PLACID PMP25 is a high-precision condenser microphone manufactured in compliance with the IEC 61094-4 requirements and classified as a Class 1 microphone.

The PMP25 microphone is optimized for pressure-field measurements.
As all PLACID microphones, the PMP25 comes with an individually calibration certificate.

Frequency response


Grid: Copper-nickel plating
Housing: Stainless Steel
Diaphragm: Nickel
Back Plate: Stainless Steel
Insulator: Crystal Quartz
Electret: Teflon



The PLACID PMP25 microphone requires a standardized 1/2″ BNC preamplifier that does not need to provide polarization.


The PMP25 is a robust and stable microphone and is being used as an all-round free field
microphone suitable for laboratory as well as field jobs.

Daily usage

PLACID recommends calibration before and after each measurement with a calibrator.

Individual calibration

All PLACID measurement microphones are being calibrated in a controlled laboratory environment using traceable calibration equipment complying with ISO17025 standards.
We recommend that all PLACID measurement microphones are re-calibrated every year to guarantee an optimized usage.
PLACID Traceable Calibration is performed by our qualified staff and under controlled conditions according to the procedures and standards such as ISO17025.


All PLACID measurement microphone sets are made of high-quality materials that will ensure long stability and durability.
The microphone diaphragm, body, and protection grid are made of high-grade stainless steel, which makes the microphone resistant to physical damage.
PLACID offers 2 years warranty against defective materials and workmanship.


Please Click and Download this product datasheet for further information

Download PLACID PMP25 Microphone Datasheet

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