集団聴力検査法の検討

概要

論文の詳細を見る
There are two principal methods of screening test for loss of hearing in common use today.. One method is to use the group phonograph speech audiometer-usually for 40∼80 children at one time.The other method is to give each child an individual "sweep frequency test" with a pure tone audiometer.The advantage of the group phonograph speech test is that a large number of children can be screened in a relatively short time. This article presents the results of an experiment in comparing the performance of two group hearing tests.One thousand three hundred and sixty-eight elementary school children were tested. In the group phonograph speech test we used the Rion GA-1011 Group Audiometer produced by Kobayashi Institute of Physical Reseach and Western Electric 4CA Audiometer.They con- sist essentially of two parts connected together electrically;namely, an ordinary phonograph and 40-80 telphone receivers.The phonograph record was made by the Japan Central Commi- ttee of Eye and Ear Protection.The loudness of the spoken numerals on the phonograph record is graduated in such a manner that each succeeding series of numerals is reproduced at an intensity of 5 db less than the preceeding series.This is done in a range of 50db and then the voice starts again at the maximum intensity, repeating the process four times altogether with different combinations of numerals. In order to decide how much loss of hearing indicates any abnormality, 232 young women with normal hearing were tested with the group phonograph speech audiometer.The relation between the hearing loss and their frequencies was shown in Fig.4 and 5.As the results, a hearing loss of 12 (in right ear) and 9 (in left ear) sensation units or greater was used as a basis for determining those who could be accounted for by normal variations, On this basis, it will be seen that 125 out of 1368 pupils tested will be classed as having deficient hearing. In the individual "sweep frequency test" with a pure-tone audiometer, three frequencies, 1000, 2000 and 4000cps, were presented at fixed sensation levels of 25db.The performance:of, the group phonograph test and the sweep test has been compared on the same subjects, - all of whom has received the careful ordinary individual audiometer test.Frequencies presented in the test were the even octaves from 125 through 8000cps. In the following table the relation between the tests above mentioned has been shown.
社団法人日本耳鼻咽喉科学会の論文

集団聴力検査法の検討

スポンサーリンク

概要

著者

関連論文

スポンサーリンク