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关于液压凿岩机的噪声特性对操作工的影响问题迄今未能给予足够的研究。在有关液压凿岩机的大量文献中,通常只列出总的噪声级(分贝,A)。分析这些文献可得出的结论是液压凿岩机比同级风动凿岩机的噪声低7～10分贝(A),明显可知,这与液压凿岩机无废气和机械噪声的辐射特点有关。分析液压凿岩机的噪声频谱可知,与风动凿岩机的频谱不同,倍频程带上的最大频率为1～2千赫兹,而风动凿岩机在高频音域
The impact of the noise characteristics of hydraulic rock drills on operators has so far failed to be adequately studied. In the extensive literature on hydraulic rock drills, only the general noise level (dB, A) is usually listed. Analysis of these documents leads to the conclusion that hydraulic rock drills are 7 to 10 decibels (A) lower in noise than comparable rock drills and it is clear that this is related to the radiation-free characteristics of hydraulic rock drills without exhaust and mechanical noise. Analysis of the noise spectrum of hydraulic rock drill shows that the frequency spectrum of pneumatic rock drill is different, the maximum frequency of the octave band is 1 ~ 2 kHz, and the wind-driven rock drill in the high-frequency range