大学物理 ›› 2009, Vol. 28 ›› Issue (11): 33-33.

• 著者文摘 • 上一篇    下一篇

影响“水杯编钟”音调变化的实验研究

陈东生[1] 贾彩丽[1] 宦强[2]   

  1. [1]上海电力学院数理系,上海200090 [2]华东师范大学物理系,上海200062
  • 出版日期:2009-11-20 发布日期:2009-11-20

The experimental study of affecting the pitch of "watered glass chime bell"

  • Online:2009-11-20 Published:2009-11-20

摘要: 利用微型麦克风和基于计算机声卡的虚拟频谱分析仪,实时采集水杯受击时的信号频谱图,通过对频谱图的分析获得水杯受击时的音调.利用Matlab对数据进行拟合得出水杯中不同体积水与受击时音调的关系.同时,研究了不同敲击点对音调的影响.

关键词: 水杯编钟, 音调, 傅里叶变换, 频谱分析

Abstract: The acoustic signals are collected by using miniature microphone and the virtual frequency spectrum instrument based on sound card if the watered glasses with different volume water are struck. The value of pitch is obtained by using the analysis of frequency spectrum picture. The data is fitted using the software Matlab and the conclusion is drawn that the relationship of the different volume water and the pitch. Finally, the effect of different striking points versus the pitch is also studied.

Key words: watered glass chime bell, pitch, FFT, frequency spectrum analysis

中图分类号: 

  • O423