Products

Montara Series

The World’s First True MEMS Full Range Microspeaker

Cowell Series

The World’s Smallest MEMS Microspeaker

Tomales Series

The World’s First True MEMS Tweeter

Montara Pro Series

The World’s First Microspeaker with DynamicVent

Features

xMEMS has produced the industry’s first monolithic TRUE MEMS speakers, eclipsing early hybrid-MEMS speakers by implementing the entire speaker (actuator and membrane) in silicon, reducing package height and eliminating driver matching and calibration due to inherent variability in traditional membrane assembly.

Through the combination of design innovation and monolithic capacitive piezo-MEMS manufacturing, xMEMS delivers a new level of performance, size, energy efficiency and uniformity not possible with traditional voice coil or hybrid MEMS approaches.

Sound Quality
  • Full bandwidth (20Hz-20kHz) with flat frequency response for occluded applications
  • High performance tweeter or midrange-tweeter for open/leaky applications
  • +/-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
Robustness
  • Monolithic piezoMEMS 10,000g mechanical shock resistance
Consistency
  • Highly uniform frequency response and phase
  • Reliable semiconductor process (JEDEC-qualified)
  • Eliminates driver matching and calibration
Longer listen times
  • Capacitive vs. current-driven architecture reduces driver power consumption
Water-proof
  • IP58 water immersion and dust resistance without special membrane
Precise Transduction
  • 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 maximum noise suppression bandwidth of stationary noise
Implementation
  • World’s First SMT-ready microspeaker
  • Companion piezo amplifier IC (xMEMS Aptos)
Small size
  • 1mm thickness
  • More space for larger batteries or more components
  • Top or Side-firing package orientations
  • 6mm ɸ (side-firing)

Montara

The World’s First True MEMS Full Range Microspeaker (In Production)

Applications

TWS

Wired Earphones

Hearing Aids

Specifications

 Montara + Aptos
Acoustic Performance (IEC 6018-4 Coupler)
SPL @ 1kHz / 30Vpp115dB
THD @ 1KHz/94dB SPL0.5%
Package DimensionsMontara Top Firing: 6.05W x 8.4L x 1.15H (mm)
Montara Side Firing: 6.05W x 1.15H x 8.4L (mm)
Aptos Amplifier: 1.92 x 1.92 x 0.6 (mm) WLCSP

Cowell

The World’s Smallest True MEMS Full Range Microspeaker (Now Sampling)

Applications

TWS

Wired Earphones

Hearing Aids

Specifications

 Cowell + Aptos
Acoustic Performance (IEC 6018-4 Coupler)
SPL @ 1kHz / 30Vpp
SPL @ 2kHz / 30Vpp		111dB
116dB
THD @ 1KHz/94dB SPL0.5%
Package DimensionsCowell Side Firing: 3.2W x 1.15H x 6.0L (mm)
Aptos Amplifier: 1.92 x 1.92 x 0.6 (mm) WLCSP

Tomales

The World’s First True MEMS Tweeter Microspeaker (Now Sampling)

Applications

TWS

Wired Earphones

Smart Glasses

Virtual Reality

Specifications

 Tomales + Aptos
Acoustic Performance (IEC 6018-4 Coupler)
SPL @ 2kHz / 30Vpp120dB
THD @ 1KHz/94dB SPL0.5%
Acoustic Performance (Free Field @ 3cm)
SPL @ 2kHz / 30Vpp
SPL @ 4kHz / 30Vpp
SPL @ 10kHz / 30Vpp		75dB
90dB
108dB
Package DimensionsTomales Top Firing: 6.05W x 8.4L x 1.15H (mm)
Tomales Side Firing: 6.05W x 1.15H x 8.4L (mm)
Aptos Amplifier: 1.92 x 1.92 x 0.6 (mm) WLCSP

Montara Pro

The World’s First Microspeaker with DynamicVent (Now Sampling)

Applications

TWS

Wired Earphones

Hearing Aids

Specifications

 Montara Pro + Aptos
Acoustic Performance (IEC 6018-4 Coupler)
SPL @ 1kHz / 30Vpp117dB
THD @ 1KHz/94dB SPL0.5%
Occlusion Suppression
Max attenuation @ 20Hz (vent open)20dB
Package DimensionsMontara Pro Side Firing: 5.15W x 10.8L x 1.15H (mm)
Aptos Amplifier: 1.92 x 1.92 x 0.6 (mm) WLCSP

DynamicVent: Next Generation, Intelligent TWS and Hearing Aids

  • Monolithic piezoMEMS design integrates transducer + DynamicVent
  • Best-of-both-worlds solution enables benefits of occluded and open earbuds
    • Occluded: Best music listening experience & ambient sound isolation
    • Open/Leaky: Spatial awareness, occlusion reduction, comfort
  • Eliminate persistent low-frequency roll-off from traditional earbud housing vents
Vent Closed

(~2dB LFRO 200-20Hz)

Best music listening experience; Optimal low frequency response

Maximize isolation for best hearing protection

Simplifies ANC; focus only on noise in the ear canal

DSP controls seal or leak based on:
  1. user input; or
  2. sensor fusion
    • Mic
    • Accelerometer
    • Pressure/Altitude
    • Proximity
Vent Open

(Adjustable attenuation up to 20dB)

Audio Passthrough (Spatial Awareness)

Remove occlusion effects while talking

Ear pressure relief