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一种新型的消声器——L型螺旋消声器已研制成功。这种消声器首次采用螺旋形通道结构,增加了通道的周长面积比和有效消声长度,并以风道进出口交角的变化来改善消声器的频率特性。在螺旋形分隔板上粘贴泡沫塑料,既增加吸声面积又减少噪声辐射,进一步提高了消声效果。 L型螺旋消声器的研制,由上海市环保局下达任务,华东建筑设计院立题设计、研究,在金山消声器厂协作下完成的。记者在不久前由市环保局主持的该课题评审会上了解到,本市噪声科学工作者对于这种新
A new type of muffler - L-type spiral muffler has been successfully developed. This muffler for the first time using a spiral channel structure, an increase of the perimeter area ratio of the channel and effective muffler length, and the angle of the air inlet and outlet changes to improve the muffler frequency characteristics. Foam on the spiral partition plate, both to increase the acoustic absorption area and reduce the noise radiation, and further improve the noise reduction effect. L-shaped spiral muffler developed by the Shanghai Environmental Protection Bureau issued a mandate, East China Institute of Architectural Design issues, research, completed in collaboration with Jinshan muffler plant. Reporter recently presided over by the Municipal Environmental Protection Bureau review of the subject learned that the city’s noise science workers for this new