• reinventing sound

    A new evolution of the microphone using MEMS technology to achieve an unprecedented signal-to-noise ratio.

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our mission


Vesper was founded to commercialize a revolutionary approach to MEMS microphones developed by co-founders Bobby Littrell and Karl Grosh at the University of Michigan. This superior microphone design aims to bring studio quality acoustics into handheld devices. 


 about our vision






our technology


Vesper’s novel piezoelectric transducer design achieves unparalleled acoustic performance. Because piezoelectric structures only require a single active membrane layer, they are not affected by squeeze film damping, the dominant noise source in capacitive microphones. Our structures deliver higher SNR, better matching and a rugged waterproof ultra-small form factor.

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who we are


Our founders, Bobby Littrell and Karl Grosh, and first employee, Aaron Rocca, are the recognized thought leaders in piezoelectric microphone design. They have partnered with experienced industry executives Matt Crowley, Craig Core and James Jeong to commercialize this disruptive design in the most demanding and highest volume market segments.

meet our team




New Sound in Town

EE Journal October 20, 2014 by Bryon Moyer   Article found here Microphones are not for the faint of heart. […]


Audio Innovation Company Vesper Launches with Very High SNR MEMS Mic Tech.

Source: Semiconductor Times, 10/14   Article found here   Vesper (formerly Baker-Calling, then Sonify, see Feb. 2014 issue) is a […]


PZT Making Waves in MEMS

Peter Clarke 9/25/2014 11:15 AM EDT Article found here Lead zirconate titanate (PZT) is adding capabilities, accuracy and resilience to […]


for press

Vesper is funded by leading venture fund Atlas Venture and strategic investors in the MEMS microphone industry. For all press inquiries please contact Matt Crowley.

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