SoundOff: Low-cost Passive Ultrasound Tags for Non-invasive and Non-Intrusive Smart Home Sensing
Summary
SoundOff introduces ultra-low-cost passive ultrasound tags that can be attached to everyday indoor objects to create non-invasive sensing for smart environments. The system uses a wearable receiver to identify unique ultrasonic emissions, with an open-source design pipeline for geometry, fabrication, and recognition, enabling integration with automation platforms while emphasizing privacy-friendly operation.