Speech recognition has gotten sophisticated, but spoken words aren’t the only revealing noises people make. We also cough, laugh, grunt, grind teeth, breathe hard, and make other sounds that can provide clues to mood and health.
Image: Good listener: This prototype piezoelectric detector attaches to a person’s head, behind the ear, and picks up body noises like chewing and laughing.
To read the original article: Noise Detector Adds a New Way to Track Yourself | MIT Technology Review
