摘要
为了丰富大学物理声学实验内容,研制了一种多功能超声波干涉实验装置。基于空气介质设计了双振子干涉声速测量实验和半波损失验证实验。分别采用干涉声场测量法和干涉条纹移动法进行声速测量实验,并利用示波器实现了干涉声场声压分布的可视化。分别以有机玻璃、橡胶和玻璃为反射面材料,利用干涉法验证掠入射条件下的半波损失现象,并估算出掠入射角的范围。该实验装置实验现象明显、可操作性强,获评北京市第十六届大学生物理实验竞赛一等奖。
A multifunctional experimental device based on the ultrasonic interference is developed.Based on the air medium,the experiments are designed to measure sound velocity by two-vibrator interferometry and to verify the half-wave loss.The sound velocity measurement experiment is carried out by means of interference field measurement and the interference fringe movement,and the sound pressure distribution of interference field is visualized by oscilloscope.The half-wave loss under grazing incidence is verified by using interference method,and the range of grazing incidence angle is estimated.Because of clear physical thinking,sufficient theoretical basis,obvious experimental phenomena,the interferometer is suitable for experimental teaching.
作者
王亚平
韩睿
周志赋
宋哲
滕永平
WANG Yaping;HAN Rui;ZHOU Zhifu;SONG Zhe;TENG Yongping(School of Physical Science and Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《实验室研究与探索》
CAS
北大核心
2024年第5期52-55,共4页
Research and Exploration In Laboratory
关键词
超声波干涉
声速测量
可视化
半波损失
掠入射角
ultrasonic wave interference
sound velocity measurement
visualization
half-wave loss
grazing incident angle
