January 9, 2019
This image from video provided by the University of Washington in January 2019 shows a demonstration of the smartphone app developed by Rajalakshmi Nandakumar, Shyamnath Gollakota and Jacob E. Sunshine that uses sound waves to measure breathing. In first-step testing reported Wednesday, Jan. 9 the device detected early breathing problems in some people who’d just injected illegal drugs. (Mark Stone/University of Washington via AP)