一、前言 机床噪声是机床动态特性的一项重要指标,以往均以“声压级”作为评定标准。但由于声压级只是表征噪声大小的主观量,不能客观描述机床的噪声发射。七十年代以来,部分先进工业国家已开展以声功率级评价机床噪声新方法的研究,目前已经制订了若干国际标准。为了在这一领域 I. Introduction Machine noise is an important indicator of the dynamic characteristics of machine tools, in the past are “sound pressure level” as the assessment criteria. However, because the sound pressure level is only a subjective measure of the size of the noise, it can not objectively describe the machine noise emission. Since the 1970s, some advanced industrial countries have carried out researches on a new method of evaluating machine noise with sound power level. At present, a number of international standards have been formulated. In order to be in this area