到目前为止，有关教室噪音的文献似乎都集中在它对一般的学生、他们的教师和听力受损者的影响上。
The literature to date on noise in school rooms appears to focus on the effects on schoolchildren in general, their teachers and the hearing impaired.
在听力受损者中，有17.4%前庭功能冷热试验双侧不对称比值（CP）超过正常范围。
The SPVN and CP were abnormal in more than 17.4 percent workers with hearing loss.
被训练成通过发出类似于电话铃或门铃声等信号，给聋子或听力受损者提供帮助的导聋犬。
Hearing dog: a dog trained to assist a deaf or hearing-impaired person by signaling the occurrence of certain sounds, such as a ringing telephone or doorbell.
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