"Howard Stapleton's research into noise has more practical applications. He invented teenager repellant.
His device, called the Mosquito, emits a high-frequency, siren-like noise that is painful to the ears of teens and those in their early20s, but inaudible to adults.
The invention grew out of his 15-year-old daughter's trip to the local store last year to buy milk. She came back empty-handed, having been intimidated by a group of teenage boys loitering outside the store.
Stapleton, who has sold and installed security systems for more than two decades, thought back to when he was 12 years old and he visited his father at work.
"I walked into this room with six people doing ultrasonic welding and immediately ran right back out again the noise was so painful," Stapleton said. "I asked an adult, 'What's that noise?' And he said, 'What noise?' "
Stapleton's company, Compound Security Systems of Merthyr Tydfil, Wales, has sold hundreds of the units to retailers, local governments, police departments and homeowners all over the United Kingdom. The company is shipping its first Mosquito units for sale in the United States next week.
"The success of this has knocked my socks off," Stapleton said."
"...painful to the ears of teens and those in their early 20s, but inaudible to adults." Funny how the author of that article doesn't consider people over the age of 18 to be adults...
But still, a cool invention.