Sneaky US Navy feedback device could stop people being able to speak

A non-lethal device developed by the US Navy aims to surreptitiously render people unable to speak by beaming their own voice back at them with a tiny delay

Sneaky US Navy feedback device could stop people being able to speak
A non-lethal device developed by the US Navy aims to surreptitiously render people unable to speak by beaming their own voice back at them with a tiny delay