Fig. 4: Smart mask for respiratory monitoring and disease prediction.
From: Three-dimensional flexible thermoelectric fabrics for smart wearables
a Schematic diagram of the smart mask integrated into an N95 mask for monitoring respiratory status, including infrared images showing temperature changes during expiration and inhalation. b Real-time thermal voltage output of the smart mask during various respiratory actions, including expiration and inhalation, and magnified views of (c) thermal voltage signals during breathing, (d) thermal voltage signals during coughing, (e) thermal voltage signals during sighing, and (f) thermal voltage signals during deep breathing.
