High frequency auditory threshold study in normal audition individuals from 20 to 30 years old

Abstract

The objective of this study was to investigate the audibility levels in the frequencies of 9000, 10000, 11200, 12500, 14000 and 16000 Hz in 30 individuals (20 female and 10 male) in the age group from 20 to 30 years old with normal audition. All the volunteers were previously submitted to the audiologic anamnesis, complete conventional tone audiometry, high frequencies audiometry and imitanciometry. As results, we observed: a) a decrease of the hearing sharpness with the increase of the frequency in both sexes and ears; b) the audibility levels in the high frequencies stayed stable among the frequencies from 9000 to 12500 Hz in both sexes, happening a decline of this one starting from the frequency of 14000 Hz; c) better answers happened for the feminine sex, except in the frequency of 16000 Hz, bilaterally, it showed worse audibility levels in the feminine sex; d) there was significant statistics difference just in the frequency of 14000 Hz in the comparison of the audibility in both ears, containing the sexes and e) there was just significant statistics difference in the audibility level in the frequency of 10000 Hz, bilaterally, and in the frequency of 12500 Hz in the right, of both sexes.