Products

Montara

The World’s First True MEMS Full Range Microspeaker

Cowell

The World’s Smallest MEMS Microspeaker

Montara Plus

The World’s Highest Sensitivity MEMS Microspeaker

Skyline

World’s First Solid-State MEMS DynamicVent For Active Ambient Control

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

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 (In Production)

Device
2-way Speaker Module
(DD Woofer + Cowell Tweeter)

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)
Cowell Top Firing: 3.2W x 6.0L x 1.15H (mm)
Aptos Amplifier: 1.92 x 1.92 x 0.6 (mm) WLCSP

Montara Plus

The World’s Highest Sensitivity MEMS Microspeaker (Now Sampling)

Full Range Applications
TWS

Wired Earphones

Midrange-Tweeter Applications
Smart Glasses

Virtual Reality

Loudspeaker Tweeter Arrays

Specifications

Montara Plus + Aptos
Acoustic Performance (IEC 6018-4 Coupler)
SPL @ 200Hz / 30Vpp
SPL @ 2kHz / 30Vpp		120dB
127dB
THD @ 1KHz/94dB SPL0.5%
Acoustic Performance (Free Field @ 3cm)
SPL @ 2kHz / 30Vpp
SPL @ 4kHz / 30Vpp
SPL @ 10kHz / 30Vpp		SPL @ 2kHz / 20Vpp 79dB
SPL @ 4kHz / 20Vpp 90dB
SPL @ 10kHz / 20Vpp 108dB
Package DimensionsMontara Plus Top Firing: 5.15 x 10.8 x 1.15 (mm)
Montara Plus Side Firing: 5.15 x 1.15 x 10.8 (mm)
Aptos Amplifier: 1.92 x 1.92 x 0.6 (mm) WLCSP

Skyline

World’s First Solid-State MEMS DynamicVent for Active Ambient Control (Now Sampling)

Applications

TWS

Wired Earphones

Hearing Aids

Specifications

Skyline + Alpine (Driver IC)
Low Frequency Roll-off @ 100Hz (IEC 6018-4 Coupler)21.5dB (Single Skyline)
25dB (Dual Skyline)
Acoustic Impedance (kg/(m4s))540k (vent open)
3.7G (vent sealed)
Equivalent Vent Diameter (mm)
(Assumes 1mm vent length)		1.1 mm (Single Skyline)
1.3 mm (Dual Skyline)
Package DimensionsSkyline: 4.0W x 5.0L x 1.15H (mm)
Alpine single channel: 1.0W x 1.2L x 0.6 (mm)
Alpine dual channel: 1.5W x 1.8L x 0.6 (mm)

Skyline DynamicVent – Active Ambient Control

Skyline Vent Closed
  • Eliminate low frequency roll-off
    • Best music experience
    • Best bass response
  • Superior passive isolation
    • Improved focus
    • Better hearing protection
icon_dsp
DSP controls seal or leak based on:
  1. user input; or
  2. sensor fusion
    • Mic
    • Accelerometer
    • Pressure/Altitude
    • Proximity
Skyline Vent Open
  • Adjustable attenuation (up to 25dB @ 100Hz)
  • Ambient passthrough
  • Spatial awareness
  • Reduced occlusion effects
    • Self-voice
    • Footsteps
  • Ear pressure relief