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Piezoelectric Microphones

By Bestech Australia

Piezoelectric Microphones are transducers used to convert acoustic sound into an electric signal.
 
Piezoelectric microphones are designed based on the piezoelectric effect resulting from properties of the piezoelectric materials that audio waves bend the piezoelectric material generating a changing voltage as the analogue output.
 
Piezoelectric microphones are used with high frequency sound finding applications in NVH (Noise, Vibration, and Harshness) testing, cabin noise analysis, pass-by noise testing, environmental noise analysis, building noise studies, acoustic chamber testing, appliance noise evaluation, wind tunnel and aerodynamics testing, as well as medical imaging and industrial Non-Destructive Testing.
 
Endevco® piezoelectric microphones measure high intensity acoustic noise and very low pressure fluctuations over a frequency range of 1 Hz to 10 kHz with a measurement range of 100 to>180 dB SPL.
 
These microphones are hermetically sealed and designed for operation in harsh environments with a temperature range of -55 to +260 ℃. Pre-polarised condenser measurement microphones available in 1/8”, ¼” and ½” diameters for multi-channel acoustic measurements, are offered in free-field, pressure, low-cost array and random incidence types and met IEC and ANSI standards.
 
Models can be provided as stand-alone units or in combination manner of a pre-calibrated microphone and low-noise preamplifier with built-in iTEDS on-board memory storage chip (per IEEE 1451.4-2004), facilitating their use within large channel count applications. 
 
Highlights for Piezoelectric Microphones:
Insensitivity to altitude changes and ambient vibration;
Directly compatible with Isotron® (IEPE) signal conditioning, offering lower overall per channel measurement cost;
Easy plug-in installation.
Simple construction;
Repairable diaphragm;
Low profile surface microphone, ideal for measuring wind-induced noise on ground and airborne vehicles
 
More product details, please click here or download  practical understanding of accelerometer specifications