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- The acoustical properties of compound impedance in a double layer sound absorbing structure is studied,Base on that,A model is constructed to optimize the double layer structure. 研究了由穿孔板及吸声材料构成的双层阻抗复合吸声结构,在此基础上建立了其声学性能模型,并通过建立优化数字模型,对其结构的各个几何参数和物理参数进行了优化设计。
- Optimization of Compound Impedance in a Double Layer Sound Absorbing Structure 双层阻抗复合吸声结构的优化设计
- Keywords sound absorbing structure;optimization design;orthography method .; 吸声结构;优化设计;正交法;
- A Study on Optimization for Compound Impedance in a Double Layer Sound Absorbing Structure 双层阻抗复合吸声结构的优化研究
- A Study of the Acoustical Properties of Compound Impedance in Sound Absorbing Structure 阻抗复合吸声结构的理论与声学特性研究
- Sound absorbing structure 吸声结构
- A specialized absorbing structure of a parasitic plant, such as the rootlike outgrowth of the dodder, that obtains food from a host plant. 吸根寄生植物，如菟丝子的根状分枝的一种特殊的可以从寄生植物处吸取食物的吸收结构
- A new type of porous sound absorbing material was made from super-strength gypsum and glass fiber. 摘要以高强石膏为胶凝材料，内掺玻璃纤维，制备出一种新型多孔吸声材料。
- A specialized absorbing structure of a parasitic plant,such as the rootlike outgrowth of the dodder,that obtains food from a host plant. 吸根寄生植物，如菟丝子的根状分枝的一种特殊的可以从寄生植物处吸取食物的吸收结构
- The absorbing structure made of an aluminum fiberboard and a cavity on its back has clear resonance absorption characteristics. 铝纤维板与背后空腔组成的吸声结构具有明显的共振吸声特性。
- A new sound absorbing foamed compound mainly made from PVC resin,EPR and rockwool has been investigated by foaming process. 以PVC树脂、EPR和岩棉为主要原材料用发泡方法制成了一种中低频吸声性能优良的新型泡沫吸声材料。
- The radar absorbing structure with active FSS whose frequency characteristics can be dynamically tuned is illustrated particularly. 重点介绍了频率特性可调的含主动式FSS的吸波结构。
- A new sound absorbing material that is good in sound absorbing at the low frequency and high frequency is made from PVC and rockwool in this paper. 利用PVC和无机物等研制了一种性能优良的吸声材料。
- Thecapability of preventing burning, self-extinguishing, heat-insulation , smoke suppressing, sound absorbing and shockproof.. 具有阻燃、自熄、隔热、消烟、吸音、抗震等性能。
- A new type of sound absorbing materials mainly made from low alkaline cement and expanding pearlite has been investigated on the basis of sound absorption principle. 摘要以低?A水泥和膨胀珍珠岩为主要原料，辅之以分散性良好的增强剂聚丙烯纤维，研制出一种新型吸声材料。
- This compound materials used in absorbing material is with sound absorbing function and light quality, wide band, good compatibility and strong inoxidizability. 这种复合材料用于吸波材料，它不仅具备良好的吸波功能，还兼备质量轻、宽频带、兼容性好和耐腐蚀性强等优点。
- The two rooms both adopted American Milliken carpet and high-class beech surface sound absorbing wall, which can ensure the comfort and privacy of the meeting. 两处会场均选用了美国Milliken地毯和高档枫木饰面吸音墙面，可保证会谈的舒适及私密。
- The team from Northwestern chose a wavelength which matched one of the absorbing structures, to try to improve the resolution of the final hologram. 为了提高最终全息图的清晰度，西北大学的这个研究小组选择了与那些吸光结构之一相符合的波长。
- Effects of the content of fiber,vesicant,pore ratio and pore diameter were investigated,the results indicates the variables have great effects on the sound absorbing performance of the samples. 实验发现,孔隙率、平均孔径大小、玻璃纤维含量、发气剂含量对材料吸声性能有显著影响。
- A new type of sound absorbing material was made from super-strength gypsum and glass fiber and the sound absorp-tion coefficient of the material was tested by standing wave tube method. 以高强石膏为主要原料,内掺玻璃纤维,在发泡剂的作用下,制备出一种新型多孔吸声材料,采用驻波管法测试材料的吸声系数。
