With the three dimensional boundary element mathematical model . simulation of transmission loss of the muffling structure is carried out .

利用三维边界元数学模型对消声结构传递损失进行了仿真计算。

The utility model relates to a muffling pressure-limiting valve , which is a muffling pressure-limiting device used on a pressure cooker .

消声限压阀是使用在压力锅上的一种消声限压装置。

Tests proved in addition to lower production cost the muffling and aerodynamic performance of this new muffler are better than the original one .

试验证明其消声及空气动力性能均优于原配消声器，此外制造成本也有所下降。

This article deals with the research of two exhaust mufflers made of porous metal-function material-spongy aluminium alloy and the contrast test of their muffling performance .

研究了多孔金属功能材料─&泡沫铝制成的两种结构的消声器，进行了消声性能对比测试。

The results show that the precision is higher than that of one dimension planer wave calculation on the exhaust silencer frequency property and the muffling magnitude .

结果表明，无论是频率成分还是消声量，二维有限元分析结果较一维平面波分析的精度有了进一步提高。