'THIS IS INTRIGUING': Hastings, Minn., considers screech machine to drive rogue teens from parks
Published 06/06/2011, St. Paul Pioneer Press / MCT
Hastings might soon install a late-night sound-blaster to keep teenagers out of one of its parks. The gizmo emits sounds audible only to young people - sounds that can't be detected by older people with less-sensitive hearing.Word count: 578
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