var items = new Array (new ImageMetaData('This undated photo provided by Compound Security Systems  shows unidentified people holding their ears while standing under a Mosquito mounted to a wall. According to  Compound Security Systems, the Mosquito is an ultrasonic device that deters teenagers with a high-pitched noise.  The high-frequency sound has been likened to fingernails dragged across a chalkboard or a pesky mosquito buzzing in your ear. It can be heard by most people in their teens and early 20s who still have sensitive hair cells in their inner ears.    (AP Photo/Compound Security Systems )  **NO SALES**','http://msnbcmedia.msn.com/i/msnbc/Components/Photo_StoryLevel/080423/080423-teen-be-gone-hmed-256p.jpg','5:57 p.m. ET, 4/23/08','AP','AP',24280860));