Optical MEMS Mics: Unlock Acoustic Quality in Audio and Sound Acquisition Apps
ABSTRACT
Audio quality matters. Yet for all their promise, the MEMS microphones first introduced in the early 2000’s still can’t match the high-fidelity sound capture of high-end electret condenser microphone (ECM) or of large century-old condenser microphone technology.
Despite the performance limitations of capacitive MEMS microphones, demand for these miniature devices has never been higher. Driven by a massive number of audio applications, from smartphones and true wireless stereo earbuds to large microphone arrays and automotive, the number of MEMS microphones is expected to reach 9.2 billion by 2030 -- according to Yole Group.
A new architectural approach from sensiBel -- optical MEMS, which combines a laser optical subsystem and miniaturization in electro-optical packaging with MEMS technology and advanced CMOS circuit design -- has eclipsed the limits of capacitive technology. With an 80dB signal-to-noise ratio (SNR) supporting a 14 dBA noise floor, 132 dB dynamic range, and 24-bit digital output, a new class of optical MEMS mics brings studio-quality audio acquisition capabilities to consumer devices.
How do optical MEMS microphones differ from previous generations of MEMS microphones? This presentation will explain how a miniaturized optical interferometry system can replace capacitive sensing, eliminating the backplate entirely. In this new architecture, the MEMS diaphragm functions as a passive mechanical element, while laser-based interferometric measurement precisely tracks diaphragm motion with exceptional linearity and stability.
The presentation will also explore how this technology represents a broader disruption in MEMS sensor design, establishing a foundation that can be extended beyond microphones to other sensing applications requiring ultra-high-precision, linear measurement.
PR Contact: Maria Vetrano, email: [email protected], tel: +857.212.6550
BIOGRAPHY
Kieran Harney’s passion for bringing compelling new microelectronic technologies to global markets is evidenced by his decades-long accomplishments in MEMS and semiconductors. Experienced in all facets of technology and ecosystem development -- from managing engineering, manufacturing, and operations to securing intellectual property, and navigating mergers and acquisitions -- Kieran is skilled at driving commercial success in new business ventures.
With deep global marketing and business development expertise across the United States, Europe, and Southeast Asia, Kieran has held senior leadership roles at major U.S. and Japanese multinational companies, including Analog Devices and TDK InvenSense, as well as at emerging European startups. An accomplished inventor, he holds 44 issued U.S. patents along with multiple international patent filings.
Kieran earned an MBA and a Bachelor of Manufacturing Engineering from the University of Limerick, Ireland.