Microspeaker is designed for smart glasses

December 06, 2021 // By Peter Clarke
MEMS  microspeaker engineered for smart glasses
Tomales is a monolithic MEMS tweeter microspeaker suitable for use in smart glasses developed by xMEMS

xMMS in the US has developed a MEMS microphone for smart glasses.

Tomales offers top and side-firing package options and 1mm-thin profile to simplify speaker placement and positioning to direct audio toward the ear in smart glasses and xR headset applications. In free-air at 3cm, Tomales delivers 75dB SPL at 2kHz, 90dB at 4kHz and over 108dB at 10kHz. Tomales implements xMEMS’ 2nd generation M2 speaker cell architecture offering improved SPL/mm2 enabling increased loudness in smaller form factors.

"Producing high-quality audio in thin form factors such as eyeglass frames can be challenging. It is difficult for a single speaker to produce acceptable low-end bass response while also delivering clear vocals and rich instrumentals," said Mike Housholder, vice president of marketing and business development at xMEMS, in a statement. Tomales is suitable for two-way woofer-tweeter implementations where it's small size and thin profile delivers improved high-end for speech, vocals and instrumentals that has been lacking in current generation smart glasses and xR headset products, Housholder said.

Tomales has a monolithic architecture implementing both actuation and diaphragm in silicon resulting in part-to-part frequency response consistency and thu reducing speaker matching or calibration time at manufacturing. The transduction mechanism eliminates the spring and suspension recovery of coil speakers which improves audio quality and sound field reproduction. The SMT-ready package with an IP58 rating for dust/water simplifies system design, integration, and assembly.

Tomales samples and evaluation kits are available today for select customers, with mass production expected in Q2 2022. Tomales is available in both top-firing (6.05 x 8.4 x 1.15mm) and side-firing (6.05 x 1.15 x 8.4mm) LGA packages. Tomales is paired with the xMEMS Aptos Class-H audio amplifier (1.92 x 1.92 x 0.6mm WLCSP).

Related links and articles:

www.xmems.com

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