📄 fourierexpo.htm
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<!-- This file create by Bob L. Sturm Sept 02 2003, using vi. Originally inspired by the MATLAB Auditory Demonstrations package created by Univ. of Sheffield, UK.--><HTML><HEAD> <TITLE>SSUM: Fourier Explorer</TITLE> <link href="style.css" rel="stylesheet" type="text/css"></HEAD><BODY><table cellpadding=0 cellspacing=0 align=center border=0 width="100%"><tr> <td> <IMG SRC="fourierexpo_t.jpg" WIDTH=137 HEIGHT=146> </td> <td align=center> <H1>Fourier Spectrum Explorer</H1> </td></tr><tr> <td colspan=2 align=center bgcolor=black> <H6><A HREF="#introduction">Introduction</A> <A HREF="#demonstration">Demo</A> <A HREF="#investigate">Investigate</A> <A HREF="#reading">Reading</A> <A HREF="#credits">Credits</A> <A HREF="SSUM.htm">Home</A></H6> </td></tr></table><br><A NAME="introduction"></A><H2>Introduction</H2><P>This application lets the user explore the spectral characteristics of signalsby dragging a window.</p><br><A NAME="demonstration"></A><H2>The tool</H2><P>Simply load a sound, choose a window size, and drag the two bars in the signalwindow to watch the spectrum change. You can change the frequency scaling usingthe scroll bar at the top of the spectral plot. The amplitude scale can be changed using the scroll bar to the left.</p><CENTER><a href="fourierexpo.jpg"><IMG SRC="fourierexpo.jpg" width=893 height=470></a></CENTER><br><A NAME="investigate"></A><H2>Things to investigate</H2><p> <OL> <LI>What are the spectral differences between the two sounds: "clarinet.wav" and"gong.wav"? <LI>What are some spectral characteristics for speech sounds?</OL></p><br><A NAME="reading"></A><H2>Further reading</H2><UL></UL><br><A NAME="credits"></a><H2>Credits</H2><p>The code to make the slidable window and updated spectrum was taken andimproved upon from the <a href="http://www.dcs.shef.ac.uk/~martin/MAD/docs/mad.htm">MAD</a> program "wavspect."</p><hr noshade><P class="credits">Produced by Bob L. Sturm and Dr. Jerry Gibson.<br>Release date: September 2, 2003<br>Copyright 2003 University of California, Santa Barbara</p></BODY></HTML>⌨️ 快捷键说明
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