[Characteristics of presbycusis: evaluated by pure tone audiometry]

In order to explore the incidence and course of presbycusis, 82 elderly and aged as well as 16 young persons were studied by Bekesy audiometry, including tone stimuli of different durations, SISI, and tone decay tests. Results showed that the hearing threshold has elevated in all the old persons. Positive correlations were found between age and hearing problems. Based on analyses of the DLI, temporal integration and tone decay tests, characteristics of the cochlear lesion had been suggested and some might exhibit retrocochlear dysfunctions.