An app can diagnose ear infections in children by emitting a soft chirp and listening to the way the sound reflects back. To work, all it requires is a smartphone and a funnel made from folded paper.
The app, developed by Justin Chan at the University of Seattle and colleagues, plays a continuous 150-millisecond sound through the paper funnel, which is placed near the ear canal.

Read the full article at https://www.newscientist.com/article/2203238-smartphone-app-that-chirps-in-your-ear-could-diagnose-ear-infections/








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