A detachable piezoelectric clip on a face mask reads speech vibrations through the mask material, achieving 6.1% character error rate in noise versus 19.7% for a conventional pin microphone.
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MaskClip: Detachable Clip-on Piezoelectric Sensing of Mask Surface Vibrations for Real-time Noise-Robust Speech Input
A detachable piezoelectric clip on a face mask reads speech vibrations through the mask material, achieving 6.1% character error rate in noise versus 19.7% for a conventional pin microphone.