音声言語医学
Online ISSN : 1884-3646
Print ISSN : 0030-2813
ISSN-L : 0030-2813
発声の効率を示す新しいパラメータと表示方法の提案
垣田 有紀平野 実
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1982 年 23 巻 3 号 p. 202-210

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A number of new parameters and new ways of display for evaluating the phonatory ability are proposed. A device has been developed to record the following three quantities simultaneously as a function of time (t) : fundamental frequency (F0), voice intensity (I), and airflow rate (U) . The aim of this paper is to find out those parameters that are most effective for the evaluation of phonation by positively using a number of quantities in combination. Firstly, parameter E' based on I and U representing a phonatory efficiency is proposed. Then, by using A, which is an alternative I normalized by F0, a revised efficiency E is proposed. E is more powerful than E' when the mode (register) change is expected. As concerns time (t), an example to suggest a possible significant relation between the decay slope of U and the intended vocal intensity is presented. Representing t in a logarithmic scale is also suggested. In this mode of representation, the data can be displayed compactly in one chart even for utterances whose durations differ by more than one order of t, and therefore it makes it easier for us to inspect the time change of phonatory ability.

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© 日本音声言語医学会
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