New York Times: Activate This ‘Bracelet of Silence,’ and Alexa Can’t Eavesdrop

New York Times: Activate This ‘Bracelet of Silence,’ and Alexa Can’t Eavesdrop. “The bracelet is like an anti-smartwatch, both in its cyberpunk aesthetic and in its purpose of defeating technology. A large, somewhat ungainly white cuff with spiky transducers, the bracelet has 24 speakers that emit ultrasonic signals when the wearer turns it on.”