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CISDOC database
| Document ID (ISN) | 59884 |
| CIS number |
93-646 |
| ISSN - Serial title |
Journal of Otolaryngology of Japan |
| Year |
1990 |
| Convention or series no. |
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| Author(s) |
Shida S., Yoshida M. |
| Title |
Clinical observation on the dip location of industrial deafness and physiological consideration on the dip origin |
| Original title |
Sōonsei nancho ni okeru "dip" no ichi to sono seiin ni tsuite no ichi kōsatsu [in Japanese] |
| Bibliographic information |
20 Nov. 1990, Vol.93, No.11, p.1823-1831. 21 ref. |
| Abstract |
As observed previously, early industrial deafness is caused by hearing loss characterised by a dip in audiometric curves at 4kHz. In fact decrements are seen not only at 4kHz, as had been generally agreed, but more significantly at 5kHz or 6kHz. Comparing the results obtained by the traditional octave audiometer which measures hearing levels at 2, 4 and 8kHz, and those obtained by audiometer which records at 4, 5, 6, 8kHz, the former missed 19% of cases of hearing deficiency and recorded much lower level of hearing loss than the latter. Traditional octave audiometry routine used in hearing assessment is not sufficient in diagnosing and controlling industrial deafness, and high frequency audiometry at 3, 4, 5, 6kHz should be considered indispensable. The possible physiological cause of the dip is discussed. |
| Descriptors (primary) |
hearing loss; audiometric tests; high-frequency audiometry; deafness |
| Descriptors (secondary) |
physiology of hearing |
| Document type |
D - Periodical articles |
| Country / State or Province | Japan |
| Subject(s) |
Noise, hearing and vibration
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| Broad subject area(s) |
Physical hazards
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| Browse category(ies) |
Diseases of the ear and hearing damage
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