近年来,各部门的噪声控制都得到重视,而且有较大的发展并取得良好的成果.但应该指出,由于缺乏对声学方面有关的基础知识,因而也有一些设计存在不足或者是多余的,以致效果不够理想,甚而个别亦出现事故或造价过大.我刊鉴于这种情况,特开设专栏,每期选取一些实际工程实例或问题,以便大家讨论.本期选取某厂的消声器设计,请读者对它的降噪量,设计原则及结构与及经济效果等提出意见,将在第3期请专家解答. In recent years, noise control in various departments has been given priority attention and has been greatly developed and achieved good results. However, it should be pointed out that there are also some designs that are inadequate or redundant due to lack of basic knowledge of acoustics The effect is not satisfactory, and even some individual accidents or costs are too large. In view of this situation, I opened a special column, each selected some practical examples or problems for discussion. Select a factory muffler design, readers Its noise reduction, design principles and structure and economic effects, etc., will be the first three experts answer.