[Hearing loss caused by a walkman radio?]

Investigations on 50 high school students showed that this group had been using the "Walkman" only 1.5 h. per day during the last 14 months. A comparison of the audiometric results obtained with these 50 "Walkman" users, with those of 20 age-related non-"Walkman" users, showed no statistically significant differences. The investigation further revealed that to avoid hearing loss, an upper threshold level of 93 dB (A) should not be exceeded for a daily "Walkman" user time of two hours.