Despite its diminutive size, the Cowell monolithic MEMS microspeaker from xMEMS Labs delivers a sound pressure level of 110 dB at 1 kHz. Aimed at true wireless stereo (TWS) earbuds and over-the-counter hearing aids, Cowell weighs just 56 mg and comes in a tiny side-firing 3.2×1.15×6.0-mm LGA package.
According to the manufacturer, the Cowell microspeaker provides up to 15 dB of gain above 1 kHz for improved speech-in-noise performance and greater vocal and instrumental clarity compared to electrodynamic and balanced armature microspeakers. Its monolithic architecture implements both actuation and diaphragm in silicon, reducing package height and eliminating driver matching and calibration.
For TWS applications, Cowell can be used as a full-range driver in occluded earbud architectures or as a small, high-performance tweeter paired with an electrodynamic woofer driver in non-occluded or leaky two-way solutions. In hearing aids, Cowell is a full-range driver that is 45% smaller than an equivalent balanced armature receiver. The microspeaker is useful for high-frequency hearing loss and improves speech intelligibility in noise.
Cowell samples and evaluation kits are available now, with mass production expected in Q2 2022. The microspeaker is paired with the xMEMS Aptos Class-H audio amplifier in a 1.92×1.92×0.6-mm WLCSP.
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