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.
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.
出处
《大学物理》
北大核心
2009年第11期33-35,41,共4页
College Physics
基金
上海市科委专项基金资助项目(071605123)
关键词
水杯编钟
音调
傅里叶变换
频谱分析
watered glass chime bell
pitch
FFT
frequency spectrum analysis
