计算机技术与发展2017，Vol.27Issue(7)：140-144,5.DOI:10.3969/j.issn.1673-629X.2017.07.032
基于Android平台的吉他智能校准系统设计与实现
Design and Implementation of a Guitar Intelligent Calibration System with Android Platform
摘要
Abstract
The traditional way to tune a guitar is mainly through hearing,which is not only a waste of time and energy,but also a lack of accuracy.To solve this problem,a portable guitar intelligent tuning system has been designed and established based on Android platform,which uses endpoints detection through short-time energy and zero-crossing counts after the pretreatments including de-noising,framing and windowing of the original sound signal.On the basis of it,Fourier transform is used to calculate the sound signal frequency.Then error between the result and standard sound frequency has been provided available information for tuners.In the laboratory environment,with sampling frequency of 44 100 Hz,10 guitars have been tested and verified systematically.Results show that compared with standard frequency,the average error of the calibrated guitars' sound frequency keeps within 2.68%,which is satisfying.The system is simple and convenient.It can apply to the tuning of guitar and other stringed instrument.关键词
吉他智能校准/端点检测/快速傅里叶变换/JNI技术Key words
guitar intelligent calibration/endpoint detection/fast Fourier transform/JNI technology分类
信息技术与安全科学引用本文复制引用
于阿强,汪方军,孙存,朱锡祥,吕钊..基于Android平台的吉他智能校准系统设计与实现[J].计算机技术与发展,2017,27(7):140-144,5.基金项目
安徽省自然科学基金(1408085QF125) （1408085QF125）
安徽大学大学生创新创业训练项目(201510357040) （201510357040）
