基于简易装置的空气柱共鸣的声速测量实验

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

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.

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.