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Researchers at the University of Auckland hope they've made a breakthrough in the treatment of tinnitus - the phantom buzzing, ringing, roaring or hissing sound in our ears that can't be heard by other people. About six percent of New Zealanders suffer from the condition which which can have a drastic impact on mental wellbeing and doesn't have any medical cure. Associate professor Grant Searchfield from the faculty of medical and health sciences speaks to Emma Hatton about the research.