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Ultra-low power Voice Activity Detection (with no need of manual activation) is becoming a must have for applications highly relying on the interactivity with the final user. The WhisperTrigger is a voice trigger. It can detects any voice from audio PDM bit-stream and then wakes-up sleeping blocks. Its unique performance combines the best rate of voice detection with the fastest detection latency.


  • Smartwatch
  • DTV
  • Remote control with voice capabilities
  • Voice wake-up security camera


  • Detection Latency (DL):
    • Down to 4.6 ms depending on the type of phoneme
  • Performances per the MIWOK-C r1.0 benchmark:
    • Noise Detected as Voice (NDV): 7 % at 85 % of VDV
    • Voice Detected as Voice (VDV): 93.6 % within 60% of the 1st phoneme
  • Ultra-low power consumption:
    • Only 25 μA in Low-Power Voice detection mode
    • 45 μA in Voice detection mode at 40 nm

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