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><channel><title>Prosig Noise &#38; Vibration Blog &#187; acoustic : Noise &amp; Vibration Blog : What You Need To Know About Noise &amp; Vibration Measurement</title> <atom:link href="http://blog.prosig.com/tag/acoustic/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>Why is the microphone pressure reference 2*10-5 Pascals?</title><link>http://blog.prosig.com/2012/01/31/why-is-the-microphone-pressure-reference-210-5-pascals/</link> <comments>http://blog.prosig.com/2012/01/31/why-is-the-microphone-pressure-reference-210-5-pascals/#comments</comments> <pubDate>Tue, 31 Jan 2012 15:22:11 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[featured]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[acoustic waves]]></category> <category><![CDATA[db]]></category> <category><![CDATA[dB reference]]></category> <category><![CDATA[reference]]></category> <category><![CDATA[sound intensity]]></category> <category><![CDATA[sound pressure]]></category> <category><![CDATA[sound wave]]></category> <category><![CDATA[speed of sound]]></category> <category><![CDATA[speed of sound in air]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2960</guid> <description><![CDATA[This seemingly simple question is actually quite fundamental.  To answer the question we need to consider sound intensity.  Now sound intensity is defined as “the average rate of flow of...]]></description> <wfw:commentRss>http://blog.prosig.com/2012/01/31/why-is-the-microphone-pressure-reference-210-5-pascals/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Measuring Torsional Vibration 101</title><link>http://blog.prosig.com/2012/01/24/measuring-torsional-vibration-101/</link> <comments>http://blog.prosig.com/2012/01/24/measuring-torsional-vibration-101/#comments</comments> <pubDate>Tue, 24 Jan 2012 10:26:13 +0000</pubDate> <dc:creator>Chris Mason</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[featured]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[acoustic data]]></category> <category><![CDATA[acoustics]]></category> <category><![CDATA[aliasing]]></category> <category><![CDATA[analysis]]></category> <category><![CDATA[gear train]]></category> <category><![CDATA[gears]]></category> <category><![CDATA[jitter]]></category> <category><![CDATA[measurement]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[prosig]]></category> <category><![CDATA[pulses]]></category> <category><![CDATA[refinement]]></category> <category><![CDATA[rotat]]></category> <category><![CDATA[rotation]]></category> <category><![CDATA[rotational]]></category> <category><![CDATA[rotational speed]]></category> <category><![CDATA[shaft]]></category> <category><![CDATA[shaft encoder]]></category> <category><![CDATA[signals]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[twist]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2875</guid> <description><![CDATA[Do you need to measure torsional vibration? Interested in shaft twist? Worried about rotational jitter? Don&#8217;t worry, we&#8217;ve got it covered. Here we have gathered together our most popular articles...]]></description> <wfw:commentRss>http://blog.prosig.com/2012/01/24/measuring-torsional-vibration-101/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>What&#8217;s All The Noise About?</title><link>http://blog.prosig.com/2011/11/24/whats-all-that-noise-about/</link> <comments>http://blog.prosig.com/2011/11/24/whats-all-that-noise-about/#comments</comments> <pubDate>Thu, 24 Nov 2011 12:25:01 +0000</pubDate> <dc:creator>Chris Mason</dc:creator> <category><![CDATA[featured]]></category> <category><![CDATA[links]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[acoustic transducers]]></category> <category><![CDATA[acoustics]]></category> <category><![CDATA[decibel]]></category> <category><![CDATA[infographics]]></category> <category><![CDATA[loud]]></category> <category><![CDATA[loudest]]></category> <category><![CDATA[loudness]]></category> <category><![CDATA[music]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[noise level]]></category> <category><![CDATA[noise level chart]]></category> <category><![CDATA[pink noise]]></category> <category><![CDATA[red noise]]></category> <category><![CDATA[resonant vibration]]></category> <category><![CDATA[sound]]></category> <category><![CDATA[Space Shuttle]]></category> <category><![CDATA[space shuttle launch]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2749</guid> <description><![CDATA[We&#8217;ve come across a number of great noise related resources lately. So, rather than keep them all to ourselves, we have decided to share them with our readers. Thanks should...]]></description> <wfw:commentRss>http://blog.prosig.com/2011/11/24/whats-all-that-noise-about/feed/</wfw:commentRss> <slash:comments>4</slash:comments> </item> <item><title>What is Synchronous (Angular) Sampling?</title><link>http://blog.prosig.com/2011/11/09/what-is-synchronous-angular-sampling/</link> <comments>http://blog.prosig.com/2011/11/09/what-is-synchronous-angular-sampling/#comments</comments> <pubDate>Wed, 09 Nov 2011 10:22:14 +0000</pubDate> <dc:creator>Adrian Lincoln</dc:creator> <category><![CDATA[featured]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[acoustic data]]></category> <category><![CDATA[acoustics]]></category> <category><![CDATA[angle domain]]></category> <category><![CDATA[angular motion]]></category> <category><![CDATA[FFT]]></category> <category><![CDATA[Fourier]]></category> <category><![CDATA[order domain]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[revolution speed]]></category> <category><![CDATA[rotation angles]]></category> <category><![CDATA[shaft encoder]]></category> <category><![CDATA[synchronous]]></category> <category><![CDATA[synchronous data]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[time domain]]></category> <category><![CDATA[vibration]]></category> <category><![CDATA[waterfall]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2228</guid> <description><![CDATA[The term synchronous data is usually applied to vibration or acoustic data that is captured from an item of rotating equipment at regularly spaced angle intervals as distinct from regularly...]]></description> <wfw:commentRss>http://blog.prosig.com/2011/11/09/what-is-synchronous-angular-sampling/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>5 Unusual &amp; Interesting Acoustic Webpages</title><link>http://blog.prosig.com/2011/10/19/5-unusual-interesting-acoustic-webpages/</link> <comments>http://blog.prosig.com/2011/10/19/5-unusual-interesting-acoustic-webpages/#comments</comments> <pubDate>Wed, 19 Oct 2011 08:23:55 +0000</pubDate> <dc:creator>Chris Mason</dc:creator> <category><![CDATA[links]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[acoustic applications]]></category> <category><![CDATA[acoustic work]]></category> <category><![CDATA[acoustics]]></category> <category><![CDATA[music]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[noise problems]]></category> <category><![CDATA[noise vibration]]></category> <category><![CDATA[refrigeration]]></category> <category><![CDATA[sound waves]]></category> <category><![CDATA[speakers]]></category> <category><![CDATA[vibration attenuation]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2616</guid> <description><![CDATA[Many of our readers spend their days studying or solving noise problems. In our day-to-day work it&#8217;s often easy to forget some of the more unusual applications and miss out...]]></description> <wfw:commentRss>http://blog.prosig.com/2011/10/19/5-unusual-interesting-acoustic-webpages/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Prosig&#8217;s Australian Agent Will Be Exhibiting At Acoustics 2011</title><link>http://blog.prosig.com/2011/10/10/prosigs-australian-agent-will-be-exhibiting-at-acoustics-2011/</link> <comments>http://blog.prosig.com/2011/10/10/prosigs-australian-agent-will-be-exhibiting-at-acoustics-2011/#comments</comments> <pubDate>Mon, 10 Oct 2011 13:37:25 +0000</pubDate> <dc:creator>Prosig</dc:creator> <category><![CDATA[news]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[australia]]></category> <category><![CDATA[ETMC]]></category> <category><![CDATA[exhibition]]></category> <category><![CDATA[noise]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2569</guid> <description><![CDATA[Prosig&#8217;s Australian agent, ETMC Technologies, will be exhibiting at Acoustics 2011, the Conference of the Australian Acoustical Society. The conference runs from 2-4 November 2011 at Holiday Inn, Surfers Paradise, Gold...]]></description> <wfw:commentRss>http://blog.prosig.com/2011/10/10/prosigs-australian-agent-will-be-exhibiting-at-acoustics-2011/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Comparison Between Sound Intensity Probes and Acoustic Cameras</title><link>http://blog.prosig.com/2010/03/15/comparison-between-sound-intensity-probes-and-acoustic-cameras/</link> <comments>http://blog.prosig.com/2010/03/15/comparison-between-sound-intensity-probes-and-acoustic-cameras/#comments</comments> <pubDate>Mon, 15 Mar 2010 12:58:37 +0000</pubDate> <dc:creator>James Wren</dc:creator> <category><![CDATA[transducers]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[acoustic camera]]></category> <category><![CDATA[microphone]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[robot]]></category> <category><![CDATA[sound intensity]]></category> <category><![CDATA[videos]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=551</guid> <description><![CDATA[Sometimes we are asked about the differences between an acoustic camera and a sound intensity probe and which of the two is better for a particular application. There is no...]]></description> <wfw:commentRss>http://blog.prosig.com/2010/03/15/comparison-between-sound-intensity-probes-and-acoustic-cameras/feed/</wfw:commentRss> <slash:comments>4</slash:comments> </item> <item><title>What is the difference between microphone types?</title><link>http://blog.prosig.com/2010/01/19/what-is-the-difference-between-microphone-types/</link> <comments>http://blog.prosig.com/2010/01/19/what-is-the-difference-between-microphone-types/#comments</comments> <pubDate>Tue, 19 Jan 2010 09:43:17 +0000</pubDate> <dc:creator>James Wren</dc:creator> <category><![CDATA[transducers]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[microphone]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[sound field]]></category> <category><![CDATA[sound pressure]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=506</guid> <description><![CDATA[I’m often asked what is the difference between free field microphones, diffuse field microphones and pressure microphones. For a run-of-the-mill ½ inch microphone the short answer is nothing. However the...]]></description> <wfw:commentRss>http://blog.prosig.com/2010/01/19/what-is-the-difference-between-microphone-types/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Sound Steering</title><link>http://blog.prosig.com/2007/09/12/sound-steering/</link> <comments>http://blog.prosig.com/2007/09/12/sound-steering/#comments</comments> <pubDate>Wed, 12 Sep 2007 09:54:20 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[automotive]]></category> <category><![CDATA[FFT]]></category> <category><![CDATA[microphone]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[pump]]></category> <category><![CDATA[Richard O'Sullivan]]></category> <category><![CDATA[runup]]></category> <category><![CDATA[steering pump]]></category> <category><![CDATA[waterfalls]]></category><guid
isPermaLink="false">http://prosig.com/blog/?p=3</guid> <description><![CDATA[The requirement was to develop a ‘standard’ test for assessing the sound quality of power steering pumps in vehicles. Measurements needed to be objective so that the method would be...]]></description> <wfw:commentRss>http://blog.prosig.com/2007/09/12/sound-steering/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Prosig / Sensound Alliance</title><link>http://blog.prosig.com/2007/04/07/prosig-sensound-alliance/</link> <comments>http://blog.prosig.com/2007/04/07/prosig-sensound-alliance/#comments</comments> <pubDate>Sat, 07 Apr 2007 15:28:37 +0000</pubDate> <dc:creator>Chris Mason</dc:creator> <category><![CDATA[news]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[acoustic holography]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[sensound]]></category><guid
isPermaLink="false">http://blog.prosig.com/2007/04/12/prosig-sensound-alliance/</guid> <description><![CDATA[Prosig USA Inc. is proud to announce an alliance with SenSound, maker of powerful 3D acoustic holography software. To kick off the new Prosig / SenSound alliance a demo day...]]></description> <wfw:commentRss>http://blog.prosig.com/2007/04/07/prosig-sensound-alliance/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Made To Measure</title><link>http://blog.prosig.com/2006/06/06/made-to-measure/</link> <comments>http://blog.prosig.com/2006/06/06/made-to-measure/#comments</comments> <pubDate>Tue, 06 Jun 2006 10:20:17 +0000</pubDate> <dc:creator>James Wren</dc:creator> <category><![CDATA[transducers]]></category> <category><![CDATA[accelerometer]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[CAN-bus]]></category> <category><![CDATA[hammer]]></category> <category><![CDATA[IEPE]]></category> <category><![CDATA[microphone]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[strain gage]]></category> <category><![CDATA[strain gauge]]></category> <category><![CDATA[transducer]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2007/11/19/made-to-measure/</guid> <description><![CDATA[In this note the different types of transducers that can be used with the Prosig P8000 series data acquisition system are discussed. The article deals with the design and function...]]></description> <wfw:commentRss>http://blog.prosig.com/2006/06/06/made-to-measure/feed/</wfw:commentRss> <slash:comments>4</slash:comments> </item> <item><title>Exhaust Development Using A Prosig P8000 System</title><link>http://blog.prosig.com/2006/02/20/exhaust-development-using-a-prosig-p8000-system/</link> <comments>http://blog.prosig.com/2006/02/20/exhaust-development-using-a-prosig-p8000-system/#comments</comments> <pubDate>Mon, 20 Feb 2006 11:17:48 +0000</pubDate> <dc:creator>James Wren</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[dynamometer]]></category> <category><![CDATA[exhaust]]></category> <category><![CDATA[microphone]]></category> <category><![CDATA[muffler]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[waterfall]]></category><guid
isPermaLink="false">http://blog.prosig.com/2006/02/20/exhaust-development-using-a-prosig-p8000-system/</guid> <description><![CDATA[The following note describes an application of the Prosig P8000/DATS system in the refinement of an automotive exhaust muffler design for a major after-market exhaust manufacturer in Europe. The particular...]]></description> <wfw:commentRss>http://blog.prosig.com/2006/02/20/exhaust-development-using-a-prosig-p8000-system/feed/</wfw:commentRss> <slash:comments>2</slash:comments> </item> <item><title>A Simple Noise Test</title><link>http://blog.prosig.com/2005/08/26/a-simple-noise-test/</link> <comments>http://blog.prosig.com/2005/08/26/a-simple-noise-test/#comments</comments> <pubDate>Fri, 26 Aug 2005 19:53:35 +0000</pubDate> <dc:creator>James Wren</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[accelerometer]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[exhaust]]></category> <category><![CDATA[Formula Ford]]></category> <category><![CDATA[microphone]]></category> <category><![CDATA[muffler]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[runup]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[vibration]]></category> <category><![CDATA[waterfall]]></category><guid
isPermaLink="false">http://blog.prosig.com/2005/08/26/a-simple-noise-test/</guid> <description><![CDATA[In a recent article we described how the Prosig P8000 hardware and DATS software had been used to help Dalmeny Racing diagnose a problem with an exhaust bracket on their...]]></description> <wfw:commentRss>http://blog.prosig.com/2005/08/26/a-simple-noise-test/feed/</wfw:commentRss> <slash:comments>2</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>A, B &amp; C Weighting</title><link>http://blog.prosig.com/2001/06/06/a-b-c-weighting/</link> <comments>http://blog.prosig.com/2001/06/06/a-b-c-weighting/#comments</comments> <pubDate>Wed, 06 Jun 2001 15:33:23 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[a weight]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[aircraft]]></category> <category><![CDATA[audio]]></category> <category><![CDATA[b-weight]]></category> <category><![CDATA[c-weight]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[unweight]]></category> <category><![CDATA[weight]]></category><guid
isPermaLink="false">http://blog.prosig.com/2001/06/06/a-b-c-weighting/</guid> <description><![CDATA[Some devices, particularly digital tape recorders, apply A-weighting to all their data in order to achieve acceptable data compression. This is fine unless you want to analyse the unweighted data...]]></description> <wfw:commentRss>http://blog.prosig.com/2001/06/06/a-b-c-weighting/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Interpretation of the Articulation Index</title><link>http://blog.prosig.com/2001/04/11/interpretation-of-the-articulation-index/</link> <comments>http://blog.prosig.com/2001/04/11/interpretation-of-the-articulation-index/#comments</comments> <pubDate>Wed, 11 Apr 2001 08:36:40 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[acoustic]]></category> <category><![CDATA[AI]]></category> <category><![CDATA[ANSI]]></category> <category><![CDATA[articulation index]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[sound quality]]></category> <category><![CDATA[speech]]></category><guid
isPermaLink="false">http://blog.prosig.com/2001/04/11/interpretation-of-the-articulation-index/</guid> <description><![CDATA[The Articulation Index or AI gives a measure of the intelligibility of hearing speech in a given noise environment. The metric was originally developed in 1949 in order to give...]]></description> <wfw:commentRss>http://blog.prosig.com/2001/04/11/interpretation-of-the-articulation-index/feed/</wfw:commentRss> <slash:comments>1</slash:comments> </item> </channel> </rss>
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