It’s named “The Silence Bracelet”, invented by computer science and engineering experts at the University of Chicago. At first glance, it looks as if it was a thick ring worn by a Baba Ji, but in fact, it is equipped with 24-digit ultrasound speakers.
Ultrasound emit waves
When bracelet turned on, it causes the ultrasound to emit waves that spread around the wearer. These waves do not sound human, but by accessing the microphones nearby, it creates a noise that they are unable to hear and record.
Explaining the reason for this invention, its inventors say that with the advancement of technology it has become very easy for people to spy. Today, microphones and cameras have become so short that they can be easily spied on even in the smallest of places. Spying can be effectively broken through this bar at least to the extent of sound recording.
Currently, he has had successful experiments but has no idea whether he will be offered for sale on a regular basis; and what will be the price if he is offered in the market.