A sonic device is seen at top right at Barrett Playground in Philadelphia. Thirty parks in the city have the devices, which emit a constant, high-pitched noise that only teenagers and young adults can hear. In Philadelphia, 30 parks and recreation centers are outfitted with a small speaker called the Mosquito. It blares a constant, high-pitched ringing noise all night long — but one that only teenagers and young adults can hear. Anyone over age 25 is supposed to be immune because, basically, their ear cells have started to die off. Philadelphia parks officials have been installing the device since , reported WHYY's Billy Penn , intending to shoo rowdy youths from the premises.
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Hearing Test – Can You Hear This?
What Noises Cause Hearing Loss? | NCEH | CDC
There are sound frequencies that only young people can hear. This ear-aging process is called presbycusis, and it can begin as early as This means you are alive. Most people over 18 should not be able to detect this sound. Some major retailers actually use this science to keep teens from loitering outside their stores. Pretty brilliant! Indoor allergies driving you crazy?
Sound that only young people can hear
Is it possible to hear sounds in space? The short answer is "No. It's so ingrained our ideas about space that people are often surprised to find out that it doesn't work that way. The laws of physics explain that it can't happen, but often enough producers don't really think about them.
To keep teens away after closing hours, Philadelphia has installed sonic devices in parks. They are noisemakers that mostly the young hear and have been banned elsewhere. In this country, Philadelphia is trying to keep certain unwanted people out of parks. The city has been playing a constant, high-pitched noise at night - a noise that only teenagers and young adults can hear.