嗓声试验:机床噪声是评价机床性能的主要指标之一。机床噪声声级过大,或者音质不良,杂音大,会分散操作工人精力,容易引起操作者疲劳,心烦意乱,从而影响到工件质量。同时,机床噪声过大往往与机床的动特性,空运转功率,零件质量,特别是齿轮,轴承箱体等的质量有关。为了实现评价机床噪声水平,试验除了按照 JB2281-78检查机床的 A 声级外,还要 Voice test: Machine noise is one of the main indicators of machine tool performance evaluation. Machine noise level is too large, or bad sound quality, loud noise, will disperse the operator’s energy, easily lead to operator fatigue, distracted, thus affecting the quality of the workpiece. At the same time, machine noise is often too large and dynamic characteristics of the machine tool, air power, parts quality, especially gear, bearing boxes and other quality related. In order to achieve the evaluation of machine noise level, in addition to test the machine in accordance with JB2281-78 A sound level, but also