{"id":53,"date":"2017-07-27T09:04:07","date_gmt":"2017-07-27T09:04:07","guid":{"rendered":"http:\/\/pafec.kevinit.co.uk\/?page_id=53"},"modified":"2017-08-22T10:35:04","modified_gmt":"2017-08-22T10:35:04","slug":"automotive-acoustics","status":"publish","type":"page","link":"https:\/\/pafec.kevinit.co.uk\/index.php\/pafec-vibroacoustics-application-areas\/automotive-acoustics\/","title":{"rendered":"Automotive Acoustics"},"content":{"rendered":"<p>In automotive acoustics it is usually possible to use uncoupled acoustic analysis. Surface vibration data may be taken from a previous structural FE analysis or from experimental measurement.<\/p>\n<p>For interior cavity problems the sound field is set up by a number of vibrating panels. For a particular point of interest, e.g. the driver&#8217;s outside ear, a contribution to the pressure at this point can be computed from each panel. These sum in the complex plane to give the resultant pressure. Panels which have a positive(negative) contribution relative to the resultant pressure are sources(sinks). Reducing vibration at a sink will actually make the problem worse!<\/p>\n<h3>Application Areas<\/h3>\n<ul>\n<li>interior cavity resonances<\/li>\n<li>panel contributions<\/li>\n<li>source\/sink identification<\/li>\n<li>drive-by noise<\/li>\n<li>air intake\/exhaust analysis<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-647\" src=\"\/wp-content\/uploads\/2017\/08\/airint.gif\" alt=\"\" width=\"330\" height=\"280\" \/><\/p>\n<p style=\"text-align: center;\">radiation from air-intake unit<br \/>\n<span style=\"font-size: xx-small;\">(model supplied by MIRA under the PACAN project)<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In automotive acoustics it is usually possible to use uncoupled acoustic analysis. Surface vibration data may be taken from a[&#8230;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":28,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/53"}],"collection":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/comments?post=53"}],"version-history":[{"count":5,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/53\/revisions"}],"predecessor-version":[{"id":709,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/53\/revisions\/709"}],"up":[{"embeddable":true,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/28"}],"wp:attachment":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/media?parent=53"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}