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一、噪声的危害噪声是一种使人厌烦,感到不需要的声音。它会损伤人的听力,导致或诱发各种疾病;还污染环境,干扰谈话,影响学习、工作和休息。1.对听力的损伤噪声对听力的损害,与噪声的强度、频率及作用时间有关。噪声影响听力,轻则是暂时性听阈迁移,重则引起听力损失,造成耳聋。人短时期处在较强的噪声环境中,会引起听觉敏感度下降。原先一个较小的声音可以听到,现在需要一个较大的声音才能听到,这就是暂时听阈迁移,或称听阈疲劳,经过一段时间之后,可以恢复正常听力。听力疲劳最先出现对4000Hz 声音的听力下降,然后向6000Hz 和
First, the harm of noise Noise is a boring, feeling unwanted voice. It can damage people’s hearing, cause or induce various diseases; also pollute the environment, interfere with conversation, affect learning, work and rest. 1. The damage to hearing Noise damage to hearing, and noise intensity, frequency and duration of action. Noise affects hearing, ranging from temporary hearing threshold migration, heavy cause hearing loss, resulting in deafness. A short period of time in a strong noise environment, will cause a decrease in auditory sensitivity. The original smaller sound can be heard, and now a larger sound is needed to hear it. This is a temporary threshold shift, or tiredness of the threshold, and after a while, normal hearing can resume. Hearing fatigue first appeared on 4000Hz sound hearing loss, and then to 6000Hz and