Objective:To know the effect of noise on hearing loss of workers.

目的：了解职业性噪声对工人听力的影响。

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Objective To observe the protective effect of low intensity noise (conditioning noise ) on high intensity noise induced hearing loss in guinea pigs.

目的观察低强度实际工作环境噪声对相应的高强度噪声所致听力损伤是否有防护作用。

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Objective To evaluate the effect of tetramethyl pyrazine(TMP)on noise induced hearing loss (NIHL) in hypobaric environment.

目的探讨川芎嗪对低气压及噪声环境下听阈阈移的影响。

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