基于水杯盛水量的辨音识键奏乐系统的设计与实现  

Key-identifying and Reproducing System Based on Different Water Volume in Cups

作　　者：郑盛梅 Zheng Shengmei(College of Information Engineering,Quzhou College of Technology,Quzhou,China)

机构地区：[1]衢州职业技术学院信息工程学院,浙江衢州

出　　处：《科学技术创新》2024年第16期195-198,共4页Scientific and Technological Innovation

摘　　要：本文设计并且制作了一个辨音识键奏乐系统,可以区分杯子的位置,区别杯子内的不同的水量,并且可以发出与杯子的频率相同的声音。主要的技术方案如下:单片机用麦克风采集到杯子发出的音频信号之后,经过傅里叶变换,将时域的信号转变为频域的信号,从而判断出当前的发音频率,即可以区分杯子的不同盛水量,区分出杯号,将杯号显示在触摸屏上面。同时单片机可以控制发声模块发出与当前敲击声对应音高的声音。实验结果表明,此辨音识键奏乐系统具有良好的性能,对不同音高的识别以及复现具有非常高的准确率。A Key-identifying and reproducing system based on different water volume in cups is demonstrated in the paper.The system is able to distinguish the location of empty cups,and to identify cups with different water volume and reproduce the same tone.Here is how the system is realized in detail:firstly,micro-processor gets sound signal from cups;secondly,Fourier-transform is applied to transform the signal from time-domain to frequency domain;thirdly,different frequencies corresponding to different cups are identified;fourthly,the cup number is displayed on the screen;finally,the same tone as the cup is reproduced by MP3 player.Our experimental results show the system has good performance in key-identifying and reproducing.

关 键 词：辨音 奏乐 水量 频率 傅里叶变换 

分 类 号：O421.1[理学—声学]