The Soundlazer is an incredible directional parametric speaker that can beam sounds from different angles, making it perfect for generating spooky Halloween sounds and scaring the crap out of people.
The Soundlazer using ultrasonic carrier waves to transmit audio to listeners in a highly focused beam of sound that behaves like light from a laser. Essentially, only people standing directly in front of the speaker can hear the audio, but people to the sides won't hear anything!
Imagine using this ingenious contraption to beam spooky sounds and disturbing dins to people and watching their reaction when they realize that no one around them is able to hear what they're hearing.
Halloween psychological disruption aside, the Soundlazer could also be used for a number of other applications in public safety, advertising and entertainment.
The Soundlazer Lets You Beam Scary Halloween Sounds Into People's Heads
Rahul Kalvapalle — October 29, 2014 — Tech
References: soundlazer & kickstarter