基于Matlab软件实现储粮害虫声信号的时频分析

Time-frequency analyze acoustical signals of pests in stored grain by Matlab

介绍了一种利用计算机软件实现储粮害虫声信号提取、分析与处理的新方法 .声信号被转化为数字信号后 ,由计算机软件以串行方式采集 ,利用Matlab软件实现数字信号处理 ,对声信号放大 ,低通滤波器滤除信号中的噪音 ,从而进行功率谱分析 .实验结果表明 ,该方法准确可行 ,软件设计灵活 ,可取代传统的硬件分析方法 ,降低了检测成本 .

This paper introduces a new method to pick up, analyze, and process the acoustical signals of pests in stored grain by computer software Matlab. The acoustical signals are translated into digital signals and are collected by computer series communication mode. Digital signal processing includes amplifying the acoustical signals, low pass filtering, and analyzing power spectra. The result of the experiment indicates the method is accurate and feasible.