Voice is a natural user interface for wearable devices and Cirrus Logic offers a complete auto path solution including low-power, always-on voice processors with audio playback and control capabilities.


Voice Processor
  • HD Voice/wideband and narrow-band support
  • Voice Activity Detector (VAD) for low power “always on” command recognition applications
  • ASR Enhance™ pre-processor for increased ASR accuracy in noise
  • Transmit (Tx) and receive (Rx) noise elimination
  • AEC plus non-linear residual echo suppressor for superior full-duplex echo-free speakerphone operation
  • Ambient aware parametric EQ and automatic level control for both Tx and Rx voice streams
  • Automatic volume control for Rx output
  • Spectrally matched comfort noise generator for Tx voice and comfort noise generator for Rx stream
Portable Codec
  • Integrated stereo 24 bit low power codec
    • 2 ADC, 94 dB SNR, -87 dB THD+N
    • 2 DAC, 100 dB SNR, -86 dB THD+N
  • Supports sample rates up to 48 kHz
  • ReTune™ mobile parametric equalizer
  • Programmable dynamic range control
  • Active noise reduction
MEMS Microphone
  • Analog and digital
  • Top and bottom ports
  • Signal-to-noise ratio (SNR):
    • 63 dB [analog]
    • 63 dB [digital]
  • Acoustic overload point (AOP) @ 10% THD:
    • 124 dB SPL [analog]
    • 120 dB SPL [digital]
  • Sensitivity with ±1 dB tolerance:
    • -38 dBV/Pa [analog]
    • -26 dBFS/Pa [digital]

Portable Codecs

Supported Products
  • WM8903
    Ultra Low Power Codec for Portable Audio Applications
  • WM8904
    Ultra Low Power Codec for Portable Audio Applications
  • WM8993
    Codec with Stereo Speaker Drivers and Class W Headphone Driver

MEMS Microphones

Supported Products
  • WM7121PE
    Top Port Analog Silicon Microphone
  • WM7132PE
    Bottom Port Analog Silicon Microphone
  • WM7331E
    Bottom Port Analog Silicon Microphone
  • WM7216E
    Low Power Top Port Digital Silicon Microphone
  • WM7236E
    Bottom Port Digital Silicon Microphone

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