亚洲人成在线:观看,狠狠88综合久久久久综合网,欧美日韩久久网,亚洲国产精华推荐单单品榜

<legend id="majsc"><abbr id="majsc"><thead id="majsc"></thead></abbr></legend>

    Search

    News

    Under what circumstances must wear protective earmuffs
    Time: 2021-01-11
    Protective earmuffs play a protective role in places with poor working conditions and large noise hazards. So, under what circumstances must you wear protective earmuffs?
     
    The comfort threshold of our human ears is generally around 50 decibels, and sounds above 80 decibels are loud, that is, the loudness level of our speaking loudly. For a long time in a noisy environment, if it exceeds 70 decibels, it will damage our hair cells. Especially high-frequency noise can hurt your hearing even more. Therefore, if you work in this environment for a long time, you must wear protective earmuffs. Of course, people are more sensitive to noise, and there are big differences between individuals. Some people are more sensitive to noise, and some people are more adaptable to noise, which is also related to human needs, emotions and other psychological factors. Regardless of the differences between people, strong noises always need to be prevented. For your health, wear protective earmuffs.
    Phone
    Wechat
    Contact us
    Tel: +86-577 - 66605255
           +86-577 - 65399555
    Fax: +86-577 - 66605252
    E-mail: onlyele@onlyele.com
    aolian@cnaolian.com
    Wab: www.xylycm.com