It's already been tried! "During a phone interview, Mr. Lopes turned on the bracelet, resulting in static-like white noise for the listener on the other end."

It's already been tried! "During a phone interview, Mr. Lopes turned on the bracelet, resulting in static-like white noise for the listener on the other end." https://www.nytimes.com/2020/02/14/technology/alexa-jamming-bracelet-privacy-armor.html https://www.nytimes.com/2020/02/14/technology/alexa-jamming-...