Philly Park Officials Criticized for Installing Devices That Blare High-Frequency Noise at Young People

There is growing criticism of Philadelphia officials' decision to install sonic devices called the Mosquito that constantly emit extremely loud, high-frequency noise from 10:00 p.m. to 6:00 a.m. every night designed to be audible only to persons aged 13 to 25, according to a Friday report by NPR's Morning Edition.