最近開発された音声機能検査装置(PS-77)の使用経験

概要

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Intensity and fundamental frequency (Fo) of voice and air flow rate during phonation were simultaneously measured and displayed by means of a newly developed phonation function analyzer (PS-77, Nagashima Co.) consisting of a microphone, a hot-wire flow meter and a 3-channel pen recorder, Fo was derived from the flow meter through the filter system.<BR>Seventy six cases with various laryngeal diseases and 20 normal adults were exa-m fined in the present study. The subjects were required to hold a mouth-piece attached to the flow meter and sustain vowel /a/ in the following fashions; easy phonation, soft voice, loud voice, low-pitched voice, high-pitched voice and falsetto. In the normal subjects, Fo curve generally showed a flat contour indicating that Fo was kept constant during phonation. Intensity and flow rate curves also tended to stay flat with occasional fluctuations or decay. In pathological cases, the three curves showed various patterns some of which appeared to be characteristic for each disease. A comparison of the curves taken before and after the treatment was often indicative of the effectiveness of the treatment. It was considered that the analyzer could provide useful information for the follow-up study of laryngeal pathology, although it could not necessarily serve the purpose of differential diagnosis of laryngeal diseases.
日本音声言語医学会の論文