在实验室里“再造”太阳和小宇宙(二)——记上海交大校长张杰院士团队科研成果  

Simulating the Sun and Small Universe in the Laboratory(2)——Descripting The Scientific Research Results of President of Shanghai Jiaotong University, Academician ZHANG Jie' s Team

作　　者：周强[1] 罗良进[1] 张石清[1] 刘枫 

机构地区：[1]台州学院物理与电子工程学院,浙江台州318000 [2]台州市三甲中学,浙江台州318000

出　　处：《实验室研究与探索》2015年第11期I0001-I0002,共2页Research and Exploration In Laboratory

摘　　要：超强激光技术使实验室里“再现”天体物理过程成为可能 在实验室研究宇宙中各种物理过程，完善现有的物理理论体系并据此做出新的预言，这一直是科学家们梦寐以求的愿望。因为包括大爆炸理论在内的物理理论，有很多至今还只存在于理论预言之中，或者是远距离观测和物理模型演绎中。In order to study the sensitivity of giant magnetostrictive flat panel loudspeaker, the paper used the simulation method to test the sensitivity of flat panel loudspeakers and moving-coil loudspeaker in the semi anechoic chamber environment. The test point was selected at one-third octave band in the audio range. The input power of loudspeaker was kept at a constant value 1 W by regulating the power amplifier and using a digital signal acquisition platform. The reading of sound level mete which away from 1 m of the loudspeaker axial was recorded. Meanwhile, the tests of vibration modes and the theoretical research were proceed with different materials of flat panel loudspeaker vibration sheets, such as glass sheets, five plywood and acrylonitrilebutadiene-styrene, and two sizes were fixed for every material. The experimental result showed that compared with moving-coil loudspeaker, flat panel loudspeaker had wider frequency response, the sensitivity of giant magnetostrictive flat panel loudspeaker was certainly decided by the area and materials of vibration thin plate. The sensitivity of a sound speed faster material was relatively higher, and the area wass larger, and the low-frequency response was stronger.

关 键 词：实验室 科研成果 上海交大 宇宙 院士 校长 太阳 物理过程 

分 类 号：N33[自然科学总论]