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pp.241-246
Published Date 1955/5/20
DOI https://doi.org/10.11477/mf.1492201318

SHIIDA and TAGUCHI investigate the ran-ge of air-conduction hearing by use of Békèsy Audiometry. The results are as follows: 1) The threshold range in air-conduction hear-ing may be divided into four different types, e. i., normal, decreased, increased and mixed-latent.

2) In conduction hearing loss the range has atendency to be on the side of increase but, still, it falls within that of the normal; In mix-ed loss of hearing, two types are recognized in that of the normal and that of the mixed-latent.

3) In perceptive loss of hearing, all four types are present but, the predominent is the increa-se& This increase in the range of threshold appears to signify post-labyrinthine loss of hearing.

4) In Reger's temporary threshold shift (TTS) 2 different types are recognized.

5) The threshold range that shows positive recuitment may be classified as the increased type while, that with negative may be consi-dered as being indefinite.


Copyright © 1955, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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