Linus Tech Tips has posted a new video about an ultrasonic directional speaker, but what are they, how do they work and who are they for?

Linus Tech Tips’ latest video demonstrates the Audfly Model B, an ultrasonic directional speaker that specializes in creating private listening zones. So why doesn’t everyone throw away their headphones and get one of these? Linus details how these ultrasonic speakers work, how far the sound can travel, the downsides, and the use cases, such as museums and theme parks.