Philadelphia officials are deploying controversial acoustic deterrent devices to keep the city's teenagers and young adults away from certain locations at night. But the same technology has been deemed unsafe by European regulators.
as a"small speaker that produces a high-frequency sound much like the buzzing of the insect—this high frequency can be heard by young people 13 to 25 years old," and reaches as far as 130 feet, depending on the set volume.
City officials have deemed the technology to be safe, but it has raised safety concerns overseas. A health regulator in Germany reported that although the risk to teenagers is"relatively low," for smaller children there is a risk from lengthy exposure, with adults unable to hear and move away."TIn 2010, the Council of Europe went further, demanding a ban on the devices, which"inflict acoustic pain on young people and treat them as unwanted birds or pests.
to catch vandalism or groups gathering late at night causing a disturbance—CCTV security cameras are currently installed at more than 60 percent of Parks and Rec facilities, with plans for cameras to be installed across all sites with this system."
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