论文部分内容阅读
由同济大学声学研究所和北京劳动保护研究所负责起草的《消声器测量方法》国家标准(GB4760—84)于84年11月通过国家标准局标准,85年10月起实施.该标准规定了消声器测量的方法和要求,包括实验室测量方法和现场测量方法.实验室测量方法是在可控实验条件下较深入细致地测试消声器的性能,主要适用于以阻性为主的管道消声器.现场测量方法是在实际使用条件下直接测试消声器的消声效果,适用于一端连通大气的一般消声器.
The National Standard for Muffler Measurement (GB4760-84), drafted by the Acoustics Institute of Tongji University and the Beijing Institute of Labor Protection, passed the National Bureau of Standards in November 84 and came into force in October 85. The standard stipulates that the muffler Measurement methods and requirements, including laboratory measurement methods and field measurement methods.Laboratory measurement method is to test the performance of the muffler in more detail under the controllable experimental conditions, mainly for resistive pipe muffler. The method is to directly test the muffler’s muffling effect under actual conditions and is suitable for the general muffler connected to the atmosphere at one end.