{"id":120,"date":"2015-02-21T17:39:10","date_gmt":"2015-02-21T09:39:10","guid":{"rendered":"https:\/\/projectkeira.com\/home\/?p=120"},"modified":"2019-11-13T18:23:42","modified_gmt":"2019-11-13T10:23:42","slug":"rear-wall-dynamat","status":"publish","type":"post","link":"https:\/\/www.projectkeira.com\/home\/rear-wall-dynamat\/","title":{"rendered":"Wall of Silence."},"content":{"rendered":"<p>With my audio system keeping me company, I drove around for a week and noticed that I was hearing some vibration at the rear of the cab, and traced it to the rear wall. With the new subwoofers the rear wall would vibrate like crazy \u2013 I could hear it better from outside the vehicle, the noise coming from the gap between the cab and the front bed wall.\u00a0 So, that meant continuing with the <strong><a href=\"https:\/\/projectkeira.com\/home\/?p=111\">Dynamat Extreme<\/a><\/strong> installation the following weekend.<\/p>\n<p>It was time to turn to the rear end and floor. Already aware of the road noise I could hear from the back wall, that was my first target. It took longer than I thought to get to the back wall since I had to remove the whole rear seat assembly first. With bare metal showing, I first thought that installing the Dynamat here would be so much easier because I didn\u2019t have to reach into door assemblies; however the rear wall was not flat, but had a series of bumps and dips the entire width of the wall, making it an exercise in patience and a lot of roller usage. I also did small sections of the floor, underneath where the front and rear floor mats sit, just to change the floor &#8220;frequency&#8221; a little bit. The rear floor was easy since I already had the rear seats out, but the front floor meant peeling back the carpet from the foot well end so I didn\u2019t have to pull the seats out again.<\/p>\n<figure id=\"attachment_121\" aria-describedby=\"caption-attachment-121\" style=\"width: 800px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-121\" src=\"https:\/\/projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc8.jpg\" alt=\"\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc8.jpg 800w, https:\/\/www.projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc8-300x225.jpg 300w, https:\/\/www.projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc8-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-121\" class=\"wp-caption-text\">Rear seats and rear interior panels removed.<\/figcaption><\/figure>\n<figure id=\"attachment_122\" aria-describedby=\"caption-attachment-122\" style=\"width: 800px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-122\" src=\"https:\/\/projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc9.jpg\" alt=\"\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc9.jpg 800w, https:\/\/www.projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc9-300x225.jpg 300w, https:\/\/www.projectkeira.com\/home\/wp-content\/uploads\/2019\/10\/raine_ft_audioc9-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-122\" class=\"wp-caption-text\">\u2026and the \u201cafter install\u201d pic, again going for full coverage.<\/figcaption><\/figure>\n<p>Once again after re-installing the rear panels and rear seat, I went and rechecked the decibel numbers again at the exact same locations and at roughly the same time of day:<\/p>\n<p><u><strong>AFTER INSTALL &#8211; MEASUREMENT #3<\/strong><\/u><\/p>\n<ul>\n<li data-xf-p=\"1\">Idle before = 49.7-db \/ after = <strong>45.5-db (-4.2-db drop)<\/strong><\/li>\n<li data-xf-p=\"1\">30mph before = 59-db \/ after = <strong>55.1-db (-3.9-db drop)<\/strong><\/li>\n<li data-xf-p=\"1\">60mph before = 72.7-db \/ after = <strong>69.1-db (-3.6-db drop)<\/strong><\/li>\n<\/ul>\n<p>So with the Dynamat on most of the large vertical areas of metal in the cab area I cut down interior noise by 4.2-db at idle and an average of approximately 3.75-db when moving. Maybe one day I\u2019ll tackle the roof for even more noise reduction, but 4.2-db quieter is definitely noticeable; I don\u2019t have to turn the volume on the stereo up as much, and there\u2019s less noise overall when driving. Speaking of the music, I started noticing the lack of clarity on the higher end, and at higher volumes I was lacking a lot of midbass punch. At this point <a href=\"https:\/\/projectkeira.com\/home\/?p=126\">I wanted more<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>With my audio system keeping me company, I drove around for a week and noticed&#8230;<\/p>\n","protected":false},"author":1,"featured_media":122,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,5],"tags":[90,91,92,93,96,95,98,97,94],"class_list":["post-120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-audiovideoentertainment","category-interior-mods-and-accessories","tag-bass","tag-dynamat","tag-dynamat-extreme","tag-minidsp","tag-rew","tag-room-eq-wizard","tag-sound-deadening","tag-spl","tag-umik-1"],"_links":{"self":[{"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/posts\/120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/comments?post=120"}],"version-history":[{"count":14,"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/posts\/120\/revisions"}],"predecessor-version":[{"id":1613,"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/posts\/120\/revisions\/1613"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/media\/122"}],"wp:attachment":[{"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/media?parent=120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/categories?post=120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.projectkeira.com\/home\/wp-json\/wp\/v2\/tags?post=120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}