Statistical Observation on Perceptive Deafness Unaccompanied with Tinnitus
1973 Volume 16 Issue 2 Pages 70-76
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1973 Volume 16 Issue 2 Pages 70-76
In order to investigate the characteristics of perceptive deafness unaccompanied with tinnitus. 298 impaired ears were studied from a statistical point of view. Chief findings were follow:
1) Of 298 impaired ears, 26.5% were unaccompanied with tinnitus at first examinations.
2) 35.4% (28ears) of impaired ears unacompanied with tinnitus had been noticed deafness in infant or newborne and 62.5% of impaired ears noticed in infant or newborne were not accompanid with tinnitus.
3) The rate of numbers of impaired ears unaccompanied with tinnitus was higher in old age than in the prime of life.
4) The rate of Numbers of impaired ears unaccompanied with tinnitus became higher as the periods from the begining of deafness to the first examination were longer.
5) According to the groups which were summed up by impaired ears with the constant periods of deafness, the rate of numbers of impaired ears unaccompanied with tinnitus became higher as the grades of hearing impairement increased.
6) According to groupes which were summed by impaired ears with the constant grades of hearing impairement, the rate of numbers of impaired ears unaccompanied with tinnitus became higher as the periods of deafness were longer.
