Work-related hearing loss has long been associated with prolonged exposure to occupational noise. But chemical exposure to "oxotoxins" can cause deafness as well. Researchers at Qld Uni are studying this to develop potential hearing tests for auditory loss detection caused by chemical exposure at work. At risk are workers handling textile, garments, plastic or rubber ware, paints, petrochemicals and other related products. Employees in aviation industries and some laboratories are also included.