Can You Hear It? Sonic Devices Play High-Pitched Noises To Repel Teens

Philadelphia is putting a gadget in 30 parks and recreation centers that blares a constant, high-pitched ringing noise that only teens and young adults can hear, all night long. Some 20 parks departments around the country are implementing the youth-repellent devices. But the devices are also extremely annoying to some older adults with sensitive ears. And critics say the campaigns are just prejudice, and wrong.

“In a city that is trying to address gun violence and safe spaces for young people,” Philadelphia City Council member Helen Gym tells NPR, “how dare we come up with ideas that are funded by taxpayer dollars to turn young people away from the very places that were created for them?”

Gym is right. Ban behavior, not people.