大学物理 ›› 2021, Vol. 40 ›› Issue (3): 38-42.doi: 10.16854 /j.cnki.1000-0712.200165

• 物理实验 • 上一篇    下一篇

基于简易装置的空气柱共鸣的声速测量实验

翦知渐,周艳明,谢中   

  1. 湖南大学物理与微电子科学学院大学物理实验中心,湖南长沙410082
  • 收稿日期:2020-05-03 修回日期:2020-06-26 出版日期:2021-03-20 发布日期:2021-03-22
  • 作者简介:翦知渐( 1964—) ,男,维吾尔族,湖南常德人,湖南大学物理与微电子科学学院副教授,博士,从事大学物理实验教学与研究工作.

The experiment of sound velocity measurement by air column resonance based on simple device

JIAN Zhi-jian,ZHOU Yan-ming,XIE Zhong   

  1. College of Physics and Electronics Science,Hunan University,Changsha,Hunan 410082,China
  • Received:2020-05-03 Revised:2020-06-26 Online:2021-03-20 Published:2021-03-22

摘要: 本文利用简易装置设计了空气柱共鸣实验,并将之用于测量声速.因为实验使用的简单器材所限,空气柱较短较粗,

需要考虑共鸣时管口辐射导致的末端效应,在计算声速时管长应加上一个修正值,同时还需截断频率较高的数据点.实验易于

实现,数据处理的过程对于学生的数学建模、数据发掘与提取等方面的能力也有很好的训练作用.

关键词: 空气柱共鸣, 声速, 末端修正

Abstract: A simple set is designed to study the resonance of air column and to measure the sound speed. Because

of the limitation of the simple equipment used in the experiment,the air column is short and thick,so it is

necessary to consider the endeffect caused by the acoustic radiation of the orifice during the resonance. The experiment

is easy to be implemented,and the data processing is helpful for training students’ability of mathematical

modeling,data mining and extraction.

Key words: air column resonance, sound speed, end correction