The aim of this study is to compare the incidence of tinnitus between mp3 users and non-users, aged between 15 and 30 years old. 100 patients will be recruited in Valença secondary schools. High frequency audiometry and otoacoustic emissions will be performed.Tinnitus patients will complete the Tinnitus Handicap Inventory questionnaire.
Study Start Date: August 2009
Study Completion Date: December 2009
Primary Completion Date: December 2009 (Final data collection date for primary outcome measure)