A group of engineers from the University of Chicago have developed a prototype bracelet that can “muffle” microphones nearby. The device is equipped with 24 speakers emitting ultrasound. Most microphones used in electronics, when the bracelet is active, will not be able to pick up sound regardless of their direction.
It is argued that the jammer bracelet is more effective than stationary “jammers”, since blind spots are typical for those – the hand is constantly in motion, which allows you to cover a larger area. The prototype copes with both microphones built into smart speakers and similar devices, as well as with hidden ones.
The prototype is bulky and so far has a not very attractive appearance. However, the developers of the device will improve it. Interested investors have already appeared. In case of sale, the bracelet will cost about $ 20.