Hearing thresholds were determined in 83 'pop' musicians with an average age of 26 years, average exposure time of 9 years and average weekly exposure time of 18 hours. The following factors had a statistically significant influence (p 95) on hearing: ageing, brief exposure per session, long exposure time in years (2 kHz), participation in military service (250 Hz), listening to pop music with head phones (2 kHz).