The device features seven individual ultrasonic speakers that are arranged to jam the speakers on Echo devices ... Nevertheless, when you open the box, you’re hit with a product guide featuring ...

University of Chicago researchers have built an experimental bracelet that uses ultrasonic broadcasts from 24 speakers to jam most microphones, no matter what direction they're in. The gadget ...

Corcoran and his colleagues think the moths are using some kind of ultrasonic jamming. "What appears most likely is that the clicks are interfering with the bats' neural processing of the echoes ...

This ultrasonic jamming device outperforms all existing ultrasonic counter-surveillance devices due to the proprietary mixed jamming signal used. The device is powered from an AC power adapter and ...

Hawk moths may be jamming bat sonar signals by rubbing their genitals. The behavior, reported in Biology Letters on 3 July, creates an ultrasonic noise that could be used to scare off an attacking ...

The device features seven individual ultrasonic speakers that are arranged to jam the speakers on Echo devices ... Nevertheless, when you open the box, you're hit with a product guide featuring ...

The device features seven individual ultrasonic speakers that are arranged to jam the speakers on Echo devices by overwhelming ... Nevertheless, when you open the box, you're hit with a product guide ...