Spying isn’t the same as it was in the old days. Today, an inconspicuous smart speaker could be recording every word you say in your own home. That threat of invaded privacy will only continue to grow as more microphone-enabled devices are released in the years to come.
to combat it. They created a bracelet that uses ultrasonic signals to jam nearby microphones. Though it isn’t something that most people would need to use on a daily basis it could represent a picture of what jewelry will need to be in the future—both stylish and functional.
The experimental version is quite clunky, looking more like a piece of audio equipment than jewelry. However, that design has a purpose. The bracelet’s array of 24 speakers emit imperceptible ultrasonic signals. To nearby microphones, these signals come across as loud static that effectively drowns out any speech in the vicinity. more
This eavesdropping countermeasure has been around forever. We experimented with it back in the 80's. It's effectiveness can be very iffy, its downsides serious. Read more about it here.
