自記オージオメトリ

DOI 被引用文献1件 参考文献16件

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  • Self-Recording Audiometry

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The self-recording audiometry by Bekesy is described in this paper.<br>Two kinds of tracings can be obtained in this audiometry, conventional and fixed-frequency tracing. In the conventional tracing, the frequency is gradually moved upward from 125 to 8000Hz. In the fixed-frequency tracing, the frequency is preset and tracings are obtained over a three-minute period. In either case, a complete test always consists of two separate tracings obtained with interrupted and continuous-tone stimuli.<br>In this test, the width of the continuous tracing, the difference in width between tracing at high and low frequency, the difference in level between continuous and interrupted tracings, etc., are evaluated, and the results may be categorized into five types of abnormalities (Jerger classification).<br>Normal or lesions of the middle ear are characterized by a type I abnormality, lesions of the cochlea by type II, lesions of the eight nerve (retro-cochlear) by type III or IV, and functional hearing loss by type V.<br>The self-recording audiometry is especially useful for the differential diagnosis of hearing loss.

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