声音在颗粒物质中的传播特性  

Characteristic of sound transmission in granular materials

作　　者：李向亭[1] 朱莲根[1] 黄学东[1] 

机构地区：[1]上海交通大学物理系,上海200240

出　　处：《物理实验》2012年第11期36-37,40,共3页Physics Experimentation

摘　　要：在声速的测量实验中,测量了声音在颗粒物质中的传播速度,经过数据分析,得到声音通过平均直径为0.5mm的玻璃珠的传播速度为258.5m/s.该实验只在原有的实验装置上增加了一些玻璃珠,学生即可了解现代软凝聚态中前沿研究中颗粒物质的性质.The sound velocity was measured in granular materials. By data fitting, the sound ve- locity was 258.5 m/s passing through glass beads with average diameter of 0.5 mm. By adding glass beads in traditional sound velocity measurement experiment, students could understand the character- istic of granular materials in the field of modern soft condensed matter.

关 键 词：声速测量 颗粒物质 复合介质 玻璃珠 软凝聚态 

分 类 号：O422.1[理学—声学]