Our hearing picks up a limited range of sounds, limits that were used successfully to keep teenagers from congregating outside British grocery stores by a device called the “teenage sound repeller." ...

TOKYO (Reuters Life!) - A Tokyo park has started playing a high-pitched tone at night that only young people can hear to help drive away teenagers who keep vandalizing the toilets and other facilities ...

A new ringtone tested in 2006 revealed only kids could hear its high-pitched sound, leaving adults baffled. A new ringtone tested in 2006 revealed only kids could hear its high-pitched sound, leaving ...