Tech that turns household surfaces into touch sensors is a touch closer to application

https://techxplore.com/news/2023-02-tech-household-surfaces-sensors-closer.html

"HumTouch detects current running from fingertips to any partially conductive surface and locates where was touched... speeds up calibration for new users... improves accuracy... wiring electrodes to edges of cloth, wood or stone surface... based on AC hum noise... new user touch paper once, have measurement mixed with preexisting calibration data from other users, and enjoy accurate location of subsequent touches up to accuracy of less than centimeter; less than width of finger"