木工圆锯噪声属高频强噪声,其频谱有两大特点(见图1A线):一是负载声级高,平均值在110分贝(A)左右,峰值可达115—120分贝(A);二是频率范围宽,峰值分布在1,000—8,000赫兹的高频区内。因此,圆锯噪声对人体危害很大。据国内外资料介绍,如选用其中一条或数条措施,便可收到一定的降 Woodworking circular saw noise is high frequency and strong noise, the spectrum has two major characteristics (see Figure 1A line): First, the load level is high, with an average of about 110 decibels (A), the peak of up to 115-120 dB (A) It is a wide frequency range with peaks in the high frequency range of 1,000-8,000 Hz. Therefore, circular saw noise is very harmful to the human body. According to domestic and foreign information, such as the selection of one or a few measures, we can receive a certain drop