文档介绍：音频信号分析
Abstract:
In this research paper, we analyze basic features of audio signals range from
the impact on signals caused by sampling to energy distribution on frequency
domain as well as characteristics of audio signals made by male and female.
Furthermore, we make a great effort on designing, realizing and analyzing
different filters (different type and different cut-frequency). At the same time, we
manage to figure out what we can get when different audio signals are filtered
out by different filters by analyzing acoustic features of filtered signals and
observing difference in time domain as well as frequency domain. The last part of
our paper focuses paring the e generated by ideal lowpass filter
and filters designed by ourselves.
Keywords: Matlab, audio signal, filters, features in frequency domain, acoustic
characteristic
摘要:
在本课程设计中,我们利用 Matlab 从时域和频率上分析了音频信号的一般
特性:从采样频率对音频信号的影响,到频率的能量分布以及男女声音的不同特
点。进一步地,我们结合课上所学的有关滤波器的知识,着重研究并分析了滤波
器的具体实现制作过程和不同类型的滤波器,不同截止频率的滤波器对音频信号
的影响。最后还对比了理想低通滤波器与实际设计所得滤波器对音频信号滤波后
的不同结果。
关键字: Matlab 音频信号滤波器频率特性人耳感受
2
音频信号分析
目录
摘要................................................................................................................................................................................... 2
第Ⅰ部分音频信号分析
一、引言............................................................................................................................................................... 5
二、初识音频信号........................................................................................................................................... 5
...................................................................................................................... 5
中的 sound 函数.................................................................................................................... 5