xMEMS Designs Thinner Microspeaker Engineered for Smart Watches and Fitness Bands

May 13 2025, 15:00
Following the debut of the original Sycamore microspeaker in late 2024, xMEMS Labs is already working on expanding the technology to even thinner form factors with the Sycamore-W. This new full-range driver is an evolution of the company's Cypress "sound from ultrasound" MEMS platform introduced in 2023, and currently waiting for the results of safety reports on long-term ultrasound exposure for humans. xMEMS is confident in those reports and is doubling down with the even thinner, Sycamore-W.
 
The original Sycamore and the new Sycamore-W. The new driver is a 1mm thin and ultra-light 150 milligram package, redefining sound possibilities for wrist-worn devices and other very compact wearables.

When unveiled, the Sycamore stood out for being extraordinarily thin, with just 1.13mm in thickness, which should be perfect for surface applications such as smart glasses. The new Sycamore-W extends xMEMS' efforts to deliver convincing audio in space-constrained mobile form factors. Measuring just 1 millimeter thin in a rectangular 20 x 4mm form factor, the new Sycamore-W reduces speaker package volume by 70%, enabling dramatically slimmer, sleeker form factors while still delivering full-range sound.

"Sycamore-W redefines audio for smart watches, combining compact design with robust performance to meet the demands of next-generation wearables," says Mike Housholder, xMEMS VP of Marketing and Business Development. "As the wrist becomes a key interface for ears-free, hands-free AI interactions, Sycamore-W empowers manufacturers to deliver premium audio in smaller, lighter, more durable devices."

The new Sycamore-W is engineered specifically for the unique demands of space-constrained wearables, enabling designers to integrate more biometric sensors and larger batteries. Compared to legacy coil speakers that are typically 3 to 4mm thick and weigh up to 3 grams, the Sycamore-W's 150mg weight dramatically reduces strain and enhances comfort, both of which are key considerations for wearable devices.

Both the existing Sycamore and the new Sycamore-W are able to deliver a full-range signal in open, nearfield applications, thanks to xMEMS implementation of "sound from ultrasound," which creates full-frequency sound from ultrasonic waves. xMEMS is conducting its own research into the potential effects of long-term exposure to the specific range of frequencies generated by these devices on human biology and is confident that very soon these will be deemed safe, particularly when applied in an open-air, nearfield topology and not inside the ear.
 

This new solution maintains the same solid-state durability xMEMS piezoMEMS speakers are known for, with component-level IP58-rated protection and robust 10,000g mechanical shock resistance. These qualities make it ideal for active lifestyle wearables and outdoor-oriented smartwatches and fitness bands.

Samples of the Sycamore-W are available now to early access customers, with volume production slated for Q2 2026. The original Sycamore will continue to serve broader applications, including smart glasses, open-fit earbuds, and laptops, while additional Sycamore family variants tailored to other specific applications will be announced later this year.
www.xmems.com
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About Joao Martins
Since 2013, Joao Martins leads audioXpress as editor-in-chief of the US-based magazine and website, the leading audio electronics, audio product development and design publication, working also as international editor for Voice Coil, the leading periodical for... Read more

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