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Solid-State Fidelity

Solid-State Fidelity: The Era of Ultra-High-Resolution MEMS Speakers

xMEMS’ solid-state MEMS micro speakers deliver a new level of performance, size, energy efficiency, and uniformity not possible with traditional voice coil speakers through the combination of design innovation and monolithic capacitive piezo-MEMS manufacturing.

xMEMS micro speaker technology is based on the inverse piezoelectric effect using piezoMEMS material and is covered by 90+ patents and over 100 patents pending.

The inverse piezoelectric effect is created by applying an electrical voltage to make the piezoMEMS contract or expand, converting electrical energy to mechanical energy. This energy excites an integrated silicon membrane to move air and generate acoustic sound waves.

Unlike bulk piezoceramics or crystals, which have been used to generate low-grade speakers and buzzers for decades, xMEMS’ piezoMEMS actuators offer an increased range of movement enabling rich, loud audio.

And now, Noble Audio’s new Falcon Max TWS (True Wireless Stereo) and FoKus earbuds will include the groundbreaking MEMS-based driver from xMEMS Labs. Through this partnership, Noble Audio’s Falcon Max headphones will be some of the first to adopt cutting-edge MEMS speaker technology. 

xMEMS Products
xMEMS Products

  • Montara, Cowell, and Montara Plus:

  • Full bandwidth (20Hz-20kHz) with flat frequency response for occluded applications

  • High-performance tweeter or midrange tweeter for open/leaky applications

  • Cypress:

  • Full bandwidth (20Hz-20kHz) for ANC earbuds

  • +/-1° phase consistency for improved spatial audio performance

  • No in-band resonances

  • Superior high-frequency response vs. coil speakers improves:

  • Clarity

  • Presence

  • Speech-in-noise performance for hearing health applications

  • 0.5% THD (94dB @ 1kHz)

  • Better SPL/mm3


  • Monolithic piezoMEMS 10,000g mechanical shock resistance

  • Highly uniform frequency response and phase

  • Reliable semiconductor process (JEDEC-qualified)

  • Eliminates driver matching and calibration

  • Capacitive vs. current-driven architecture reduces driver power consumption

  • IP58 water immersion and dust resistance without special membrane

  • The monolithic design eliminates spring and suspension recovery of coil-based speakers

  • Fast mechanical response (<50μs group delay) enables improved ANC bandwidth of nonstationary noise

  • Near-zero phase delay increases the maximum noise suppression bandwidth of stationary noise

  • World’s First SMT-ready micro-speaker

  • Companion piezo amplifier IC (xMEMS Aptos)

  • 1mm thickness

  • More space for larger batteries or more components

  • Top or Side-firing package orientations

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