REPORT: High-tech muffler speakers make diesel engine sound sporty, cut noise levels by 20 dB
 

<p>Filed under: <a href="http://www.autoblog.com/category/etc/" rel="tag">Etc.</a>, <a href="http://www.autoblog.com/category/safety/" rel="tag">Safety</a>, <a href="http://www.autoblog.com/category/tech/" rel="tag">Technology</a></p><a href="http://www.sae.org/mags/AEI/6737"><img hspace="4" vspace="4" border="1" alt="" src="http://www.blogcdn.com/www.autoblog.com/media/2009/09/tailpipe_speaker_630-1252603855.jpg" /></a><br />
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An exhaust-system and heating-solution supplier has reportedly engineered an electronic way to modify the sound coming from a vehicle's tailpipe. The company, <span class="Company">Ebersp&au ml;cher, claims the innovation can make diesel-powered vehicles sound sportier and add an audible sound track to near-silent electric vehicles.<br />
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While mechanical devices - including flaps, dampers, or acoustic materials - have become commonplace in modern exhaust systems, this unique technology utilizes a dedicated electronic control unit (ECU) to emit sound waves to counter much of the unwanted frequencies (similar to the process of noise-canceling headphones). Of course, the same speaker technology that generates the "white noise" may be used to create new exhaust notes.<br />
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The obvious benefits are more appealing exhaust tunes, but it doesn't just stop there. This sound-deadening technology allows automakers to reduced the size of the existing mufflers (saving both weight and cost), and it may add some <a href="http://green.autoblog.com/2008/05/08/minnesota-boy-rides-bike-into-prius-he-didnt-hear/">needed noise to the electric vehicles</a> navigating our roads and highways.</span><br />
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[Source: <a href="http://www.sae.org/mags/AEI/6737">SAE International</a>]<br /><p style="padding:5px;backgr ound:#ddd;border:1px solid #ccc;clear:both;"><a href="http://www.autoblog.com/2009/09/11/report-high-tech-muffler-speakers-makes-diesel-engine-sound-spo/">REPORT: High-tech muffler speakers make diesel engine sound sporty, cut noise levels by 20 dB</a> originally appeared on <a href="http://www.autoblog.com">Autoblo g</a> on Fri, 11 Sep 2009 16:30:00 EST. Please see our <a href="http://www.weblogsinc.com/feed-terms/">terms for use of feeds</a>.</p><h6 style="clear: both; padding: 8px 0 0 0; height: 2px; font-size: 1px; border: 0; margin: 0; padding: 0;"></h6><a href=http://www.sae.org/mags/AEI/6737>Read</a>&nbsp;|&nbsp;<a href="http://www.autoblog.com/2009/09/11/report-high-tech-muffler-speakers-makes-diesel-engine-sound-spo/" rel="bookmark" title="Permanent link to this entry">Permalink</a>&nbsp;|&nbsp;<a href="http://www.autoblog.com/forward/19157058/" title="Send this entry to a friend via email">Email this</a>&nbsp;|&nbsp;<a href="http://www.autoblog.com/2009/09/11/report-high-tech-muffler-speakers-makes-diesel-engine-sound-spo/#comments" title="View reader comments on this entry">Comments</a>

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