The effect of sound proofing room is designed according to the conditions of work-site.Generally, more than 20 dB can be reduced when the noise at work-site is bigger than 100 dB;
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释义
消音房的效果由工作现场决定,一般情况下,现场噪音大于100分贝时,可降噪音20分贝以上。
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