BSR,FFRによる中,低音域聴覚域値の測定

概要

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The frequency specificity of the brain stem response (BSR) and the frequency-following response (FFR) evoked by 500Hz tone bursts were studied in 20 cases of flat, high-frequency and low-frequency hearing losses.In nine cases of flat sensorineural hearing loss, both the thresholds of the BSR and the FFR corresponded well to pure tone audiometric thresholds. In cases of both high- (five cases) and low-frequency (six cases) sensorineural hearing losses, the threshold of the 500Hz FFR corresponded well to the pure tone audiometric thresholds at 500Hz. At the same time, the thresholds of the 500Hz BSR corresponded well to the pure tone audiometric thresholds at 500Hz and 1, 000Hz.Thus, our conclusion was that the FFR evoked by 500Hz tone bursts was applicable in the objective assessment of the hearing threshold at 500Hz. At the same time, the BSR evoked by 500Hz tone bursts was also applicable in the hearing thresholds at 500Hz and 1, 000Hz.
耳鼻咽喉科臨床学会の論文