PCB Piezotronics 378A21 Random Incidence Microphone

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The PCB Piezotronics 378A21 Random Incidence Microphone is a perfectly made combination of microphone and preamplifier to measure environmental and cabin noise, along with room acoustics and white goods testing. The 378A21 maintains a flat response for diffuse field applications for accurate measurement even at the highest frequencies.

The 378A21 1/2" microphone also meets various standards for its measurements, including the IEC 61672 Class 1 compliant system. PCB Piezotronics 378A21 random incidence microphones cover a frequency range from 4 Hz to 25 kHz with a maximum amplitude of 150 dB.

Nominal diameter	1/2"
Sensitivity (±2 dB)	-38 dB re 1 V/Pa
Sensitivity	12.6 mV/Pa
Frequency range (±2 dB)	4 to 25,000 Hz
Cartridge thermal noise (dB[A] re 20 μPa)	20
Inherent noise (dB[A] re 20 μPa)	22
Harmonic distortion: 3% (dB re 20 μPa)	162
Distortion limit (dB re 20 μPa)	150

PCB Piezotronics 378A21 Random Incidence Microphone

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