文章摘要
李宏斌,徐楚林,温周斌.基于短时傅里叶变换的异常音检测方法[J].声学技术,2014,33(2):145~149
基于短时傅里叶变换的异常音检测方法
A STFT based method for detecting Rub & Buzz defects of loudspeaker and its application research
投稿时间:2013-10-23  修订日期:2014-01-22
DOI:10.3969/j.issn1000-3630.2014.02.010
中文关键词: 扬声器  异常音  短时傅里叶变换  时频图
英文关键词: loudspeaker  irregular signals  short-time Fourier transform  time-frequency map
基金项目:
作者单位E-mail
李宏斌 中国科学院声学研究所东海研究站, 上海 200032 feishastop@gmail.com 
徐楚林 中国科学院声学研究所东海研究站, 上海 200032
浙江中科电声研发中心, 浙江嘉善 314100 
 
温周斌 中国科学院声学研究所东海研究站, 上海 200032
浙江中科电声研发中心, 浙江嘉善 314100 
 
摘要点击次数: 916
全文下载次数: 1999
中文摘要:
      提出一种基于短时傅里叶变换的扬声器异常音检测方法,该方法首先对由扫频信号激励的扬声器声响应信号进行短时傅里叶变换,然后根据扬声器异常音信号的特点将所获得的时频图分割为若干区域,并提取各个区域内的时频图所对应的矩阵,最后通过计算被测扬声器声响应信号所对应区域内的矩阵与黄金样品所对应的矩阵之间的距离来判断该扬声器是否存在异常音。还简要介绍了基于该方法实现的扬声器异常音在线检测仪,实验室及企业生产线初步检验结果表明,该方法简单有效,可用于部分种类扬声器的异常音在线检测。
英文摘要:
      This paper presents a new method of Rub & Buzz detection for loudspeakers based on Short-Time Fourier Transform(STFT), which is performed as follows: Firstly, the one-dimensional sound signal, which is stimulated by a swept sinusoidal signal, is changed into a two-dimensional time-frequency map; Secondly, the time-frequency map is divided into several segments according to the irregular signals' (Rub & Buzz) characteristics and the corresponding matrix is extracted in each segment; Thirdly, the distances between each matrix and each standard matrix which is extracted from Golden Units are calculated. By comparing the distances with a certain threshold, the tested loudspeaker can be identified whether PASS or FAIL. The experimental results show that this method is simple and effective, and has some practical value in the on-line QC quality control.
查看全文   查看/发表评论  下载PDF阅读器
关闭
function PdfOpen(url){ var win="toolbar=no,location=no,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes"; window.open(url,"",win); } function openWin(url,w,h){ var win="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=" + w + ",height=" + h; controlWindow=window.open(url,"",win); } &et=C70A2D3ECC42D68C7DB5990A440C60E61293CBCEB7E8D816A34FE5D5D1FD9F90A086D3D90D682452CD8DB80A3349C13E436856231FC19DA000A470051E5BEBE0EFBD14DE83884B97EEF37C290CD344F7293DD676C88A3778A161830B9F0F92AB3FB6680C3A4B67BF&pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=DDCFCD5ACE1B1E5A6D46213553C850CA&yid=9EAD63ADE6B277ED&aid=&vid=&iid=0B39A22176CE99FB&sid=769BD58726D66E7D&eid=EB552E4CFC85690B&fileno=20140210&flag=1&is_more=0">