排序方式: 共有21条查询结果,搜索用时 15 毫秒
1.
2.
The acoustical quality of an ordinary hall,namely the reverberation time and the spatial nonuni-formity of sound pressure level in audience area,was simulated on a microcomputer.Comparisonbetween calculation,measurement and simulation of reverberation time shows that the reverberationtime from simulation is closer to measurement than from calculation,if the absorption of the audience isproperly chosen,in the frequency range from l25 to 4000 Hz;the average deviation is less than 10%.For the spatial nonuniformity of sound pressure level,there is a good correspondency botween thesimulation and the measurement.In addition,some details in simulation were discussed. 相似文献
3.
4.
5.
6.
空腔、消声器和隔声结构的声学特性通常是使用连续正弦声波来测量,各种多孔材料的吸声特性也是在驻波管中用正弦波来测量。这些测量给出的资料与稳态激励有关,冲击波如轰声(sonic booms),冲床撞击辐射的冲击声等等对它们的发生机理和传播特性,特别是非线性方面和高声强噪声控制问题是目前流行的课题。一般,冲击声的能量是分布在空间一个小范围内,也限制在很短持续时间之内,该现象本质上是瞬态的,在研究这种现象中为获得非稳态激励的任何瞬态响应就使用声脉冲。 相似文献
7.
8.
9.
10.