Statistical distribution of normal hearing thresholds under free-field listening conditions

概要

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The statistical distribution of normal hearing thresholds for pure tones of frontal incidence under binaural, free-field listening conditions was estimated as a function of frequency. First, the form of threshold distribution was investigated with threshold measurement data of the present study and those of other studies. Analytical results indicate that the threshold distribution has a form of normal distribution for the frequency range from 25Hz to 16kHz. Second, under the assumption of normality, standard deviations of thresholds were calculated for the frequency range from 25Hz to 18kHz by combining available threshold data of different studies. A supplementary experiment showed that thresholds at frequencies above 16kHz were measurable with high reliability. These results illustrate the profile of our auditory sensitivity more accurately because they account for individual differences.
社団法人日本音響学会の論文