補聴器の最大出力音圧の語音明瞭度への影響

概要

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The effects of changes of maximum power output (MPO) levels of hearing aids on speech discrimination scores were studied in 10 patients with moderate and 10 with moderately severe sensorineural hearing loss. Speech discrimination tests at six intensity levels were performed with four kinds of MPO.(1) The lowest MPO level in which reduction of intelligibility was not found was 110dB SPL in patients with moderately severe hearing loss and 100dB SPL in patients with moderate hearing loss. (2) The intelligibility of affricate, fricative and voiceless consonants and semivowels was reduced more than that of other consonants, mainly because of the low level of the MPO setting.In order to protect ears from daily noise, it is recommended that MPO levels be set as low as possible within the limits of preserving good intelligibility.
耳鼻咽喉科臨床学会の論文