Grades of hearing impairment (WHO1997).
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https://figshare.com/articles/dataset/_Grades_of_hearing_impairment_WHO1997_/941867
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资源简介：
Grades 2 to 4 are classified as disabling hearing impairment. The audiometric ISO values are averages of values at 500, 1000, 2000, 4000 Hz.
创建时间：
2014-02-21
