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><channel><title>Prosig Noise &#38; Vibration Blog &#187; Butterworth : Noise &amp; Vibration Blog : What You Need To Know About Noise &amp; Vibration Measurement</title> <atom:link href="http://blog.prosig.com/tag/butterworth/feed/" rel="self" type="application/rss+xml" /><link>http://blog.prosig.com</link> <description>Telling you what you need to know about noise &#38; vibration</description> <lastBuildDate>Tue, 07 Feb 2012 10:49:33 +0000</lastBuildDate> <language>en</language> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> <generator>http://wordpress.org/?v=3.3.1</generator> <item><title>Analyzing Shaft Twist And Repairing Damaged Tachos</title><link>http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/</link> <comments>http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/#comments</comments> <pubDate>Wed, 19 Oct 2005 09:22:40 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[Butterworth]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[phaseless]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[runup]]></category> <category><![CDATA[shaft]]></category> <category><![CDATA[shaft encoder]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/</guid> <description><![CDATA[A shaft has been instrumented with two shaft encoders, one at each end. Each shaft encoder gives out a once/rev pulse and a 720 pulses/rev signal. Each signal was digitised...]]></description> <wfw:commentRss>http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/feed/</wfw:commentRss> <slash:comments>1</slash:comments> </item> <item><title>Audio Equalisation Filter &amp; Parametric Filtering</title><link>http://blog.prosig.com/2005/05/17/audio-equalisation-filter-parametric-filtering/</link> <comments>http://blog.prosig.com/2005/05/17/audio-equalisation-filter-parametric-filtering/#comments</comments> <pubDate>Tue, 17 May 2005 14:14:20 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[Butterworth]]></category> <category><![CDATA[Chebyshev]]></category> <category><![CDATA[filter]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[tachometer]]></category><guid
isPermaLink="false">http://blog.prosig.com/2005/05/17/audio-equalisation-filter-parametric-filtering/</guid> <description><![CDATA[When working with audio signals a common requirement is to be able to equalise, cut or boost various frequency bands. A large number of hardware devices on the market provide...]]></description> <wfw:commentRss>http://blog.prosig.com/2005/05/17/audio-equalisation-filter-parametric-filtering/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>High Pass Filtering And Tacho Signals</title><link>http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/</link> <comments>http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/#comments</comments> <pubDate>Wed, 06 Jun 2001 17:13:29 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[Butterworth]]></category> <category><![CDATA[engine]]></category> <category><![CDATA[gearbox]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[phaseless]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[tacho]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/</guid> <description><![CDATA[It is sometimes necessary to pass a signal through a high pass filter to eliminate low frequency signals. These may arise for instance from whole body vibrations when perhaps our...]]></description> <wfw:commentRss>http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/feed/</wfw:commentRss> <slash:comments>2</slash:comments> </item> <item><title>Removing Phase Delay Using Phaseless Filtering</title><link>http://blog.prosig.com/2001/06/06/removing-phase-delay-using-phaseless-filtering/</link> <comments>http://blog.prosig.com/2001/06/06/removing-phase-delay-using-phaseless-filtering/#comments</comments> <pubDate>Wed, 06 Jun 2001 09:16:07 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[Bessel]]></category> <category><![CDATA[Butterworth]]></category> <category><![CDATA[Chebyshev]]></category> <category><![CDATA[filtering]]></category> <category><![CDATA[frequency]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[Nyquist]]></category> <category><![CDATA[phase delay]]></category> <category><![CDATA[phaseless]]></category><guid
isPermaLink="false">http://blog.prosig.com/2001/06/06/removing-phase-delay-using-phaseless-filtering/</guid> <description><![CDATA[In many instances we need to filter a signal to remove unwanted frequencies. If we use classical filters such as Butterworth, Chebyshev or even Bessel then a phase delay is...]]></description> <wfw:commentRss>http://blog.prosig.com/2001/06/06/removing-phase-delay-using-phaseless-filtering/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> </channel> </rss>
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