...The most basic test is performed with a pure tone audiometer. This device emits pure tones at seven frequencies per octave, from 125Hz to 8000Hz, at any desired intensity, and by creating an audiogram that links the minimum audible threshold for each frequency, the degree of hearing loss can be diagnosed. Furthermore, by comparing two audiograms, one in which the test sound is measured with an air conduction receiver (a so-called earphone, and the test method using this is called air conduction measurement) and the other in which it is measured with a bone conduction receiver (and the test method using this is called bone conduction measurement), it is possible to determine whether the hearing loss is occurring in the middle ear conductive system or the sensorineural system after the inner ear, which is the starting point for detailed hearing tests. *Some of the terminology that mentions "audiogram" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…最も基本的な検査は純音オーディオメーターによって行われる。この装置は125Hzから8000Hzまで,オクターブごとに7段階の周波数の純音が,任意の強さで発振されるものであり,やっとききとれる聴力レベル,すなわち最小可聴域値をそれぞれの周波数別に結んだオーディオグラムaudiogramを作成することによって,難聴の程度を診断することができる。さらに検査音を気導受話器(いわゆるイアホンで,これによる検査法を気導測定という)と骨伝導型の受話器(これによる検査法を骨導測定という)で測定した二つのオーディオグラムを比較することにより,難聴の発生部位が中耳伝音系か内耳以後の感音系であるかを知ることができ,精密聴力検査の出発点となる。… ※「audiogram」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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