条件詮索反射聴力測定法(C.O.R.-audiometry)の検討

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タイトル別名
  • INVESTIGATION ON CONDITIONED ORIENTATION REFLEX AUDIOMETRY
  • ジョウケン センサク ハンシャ チョウリョク ソクテイホウ C.O.R.-audiometry ノ ケントウ

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Conditioned orientation reflex audiometry (COR-audiometry) is based-on. the fact that a child, being given a strange stimulus, always looks toward the source of the stimulation. This reflex is called "orientation reflex". If the reflex is conditioned with a pure tone, hearing of children under three years of age is to be easily measured by using the reflex as the indicator of hearing.<br>Hearing acuity of 250 children under 4 years of age was measured by means of COR-audiometry. COR-audiometry was successful in 44.8 per cent of the children under 1 year, 85.1 per cent in the group aged 1 to 2 years, 87.9 per cent in the group aged 2 to 3 years and 56.3 per cent in the group of 3 to 4 years. The most suitable age of a child for the test is found to be from 12 months to 3 yaers.<br>The average thresholds decreased toward the 0db as the age increased. The average thresholds was 30db in the children under 1 year, 15 to 25db in 1 to 2 years and 10 to 15db in 2 to 3 years of age.<br>From the comparison of the thresholds obtained by the first and the second test, the comparison with the other objective audiometry and the comparison with the data obtained by the other examiners, the conclusion seems to be drawn that the COR-audiometry is one of the most reliable method for pure tone audiometry young children under three years of age.

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