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  3. A hearing test that analyses brain waves for subconscious responses to sound has recently been devised by a team of specialists

A hearing test that analyses brain waves for subconscious responses to sound has recently been devised by a team of specialists

admin2009-04-23  75
问题     A hearing test that analyses brain waves for subconscious responses to sound has recently been devised by a team of specialists at the University of Iowa. Instead of depending on the patient to indicate when he hears a laboratory-controlled noise, as in the traditional form of testing, this new method, called electric response audiometry, enables audiologists to trace the noise’s path directly from the ear to the brain while the patient relaxes or sleeps. Although brain responses have been used in other auditory tests for some time, the University of Iowa specialists are the only scientists to date who analyze simultaneously three components of hearing—the responses of the middle ear, the auditory nerve, and the brain stem. This information helps to identify the precise location of a hearing problem and, at the same time, to measure its severity. While electric response audiometry is not meant to replace conventional means of testing, it is specially effective in diagnosing hearing problems in very young children, multiply handicapped individuals, and psychologically disturbed persons because it does not require the patient’s active participation.
选项 A、whether a person is awake or asleep
B、only if a person is relaxed
C、particularly if a person hears a loud noise
D、particularly when a person is dreaming
答案A
解析 此题需根据关键词进行简单推理。文章中"...this new method，called electric response audiometry，enables audiologists to trace the noise’s path directly from the ear to the brain while the patient relaxes or sleeps."具体说明了电子反应测听技术的功能是“当患者处于松驰状态或是睡眠状态时，电子反应测听技术均能使听觉学家直接跟踪从耳到脑的噪音路径。”C项和D项根本未提及，B项不全面，A项所提及的清醒状态并不违背文中所提及的松弛状态，故选A。
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