MEMS microphone is designed for loud environments

June 05, 2019 //By Rich Pell
MEMS microphone is designed for loud environments
Piezoelectric MEMS transducer company Vesper (Boston, MA) has introduced an ultra-high acoustic overload point (AOP) differential analog output microphone.

The VM2020 piezoelectric MEMS microphone, says the company, marks the first consumer product-ready ultra-high AOP microphone in mass production in a standard form factor and package. The microphone can record in extremely noisy environments without distortion.

"This is the only mass manufacturable microphone on the market that can function above 150 dB and opens up an incredible variety of new audio applications," says Matt Crowley, CEO of Vesper. "It is now possible to have acoustic monitoring systems in the loudest, dirtiest environments."

Based on the company's piezoelectric MEMS transducer technology, the VM2020 features inherent robustness and linearity that, says the company, make it uniquely suitable for applications where a microphone will be exposed to extremely high sound pressure levels. The VM2020 does not saturate even when located in close proximity to large professional audio speakers or heavy industrial equipment, and will function normally in rugged industrial settings and automotive environments.

Up until now, says the company, ultra-high AOP microphones were either extremely expensive, large in size, or not as robust. The VM2020 functions perfectly to 150 dB and only hits 10% distortion at 152 dB. Even when the sound levels go above 152 dB - equivalent to the volume level generated by a heavy-duty train horn - the single layer microphone will recover instantaneously.

The 3.76 x 2.95 x 1.3-mm packaged MEMS microphone is reflow solder compatible with no sensitivity degradation. The VM2020 is now broadly sampling.


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