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《工程机械噪声测量方法》标准(JB3774·2—84)和《工程机械噪声限值》标准(JB3774·1—84)已于1985年5月1日起贯彻执行。这两标准是由天津工程机械研究所和北京市劳动保护科研所负责起草的。机械工业部重型矿山机械局指出:限值标准是对工程机械的基本要求,应努力降低噪声,对尚达不到此标准的工厂应采取有效措施限期达到。此标准作为今后行业评比和产品创优的条件。上述标准是工程机械第一个噪声标准,采用了以能量为基础的声功率测量方法,比较科学,精度较高。为使读者进一步了解标准和更好地贯彻标准,现将标准内容简介如下。
The “Mechanical Machinery Noise Measurement Method” Standard (JB3774·2-84) and the “Construction Machinery Noise Limit” Standard (JB3774·1-84) have been implemented since May 1, 1985. The two standards were drafted by the Tianjin Institute of Construction Machinery and the Beijing Municipal Labor Protection Research Institute. The Heavy Mining Machinery Bureau of the Ministry of Machinery Industry pointed out that the limit value standard is the basic requirement for construction machinery and efforts should be made to reduce noise. For factories that do not meet this standard, effective measures shall be taken within a time limit. This standard serves as a condition for future industry competition and product excellence. The above standard is the first noise standard for construction machinery and adopts energy-based sound power measurement methods, which are more scientific and have higher precision. In order to provide readers with a better understanding of standards and better implementation of standards, the standard content is now summarized as follows.