{"id":238,"date":"2013-11-04T20:25:00","date_gmt":"2013-11-04T20:25:00","guid":{"rendered":"http:\/\/dbbd.sg\/blog\/uncategorized\/visit-to-a-semi-anechoic-chamber-cone-of-silence\/"},"modified":"2022-03-09T07:33:23","modified_gmt":"2022-03-09T07:33:23","slug":"visit-to-a-semi-anechoic-chamber-cone-of-silence","status":"publish","type":"post","link":"https:\/\/dbbd.sg\/blog\/2013\/11\/visit-to-a-semi-anechoic-chamber-cone-of-silence\/","title":{"rendered":"Visit to a Semi-Anechoic Chamber \/ Cone-of-Silence"},"content":{"rendered":"<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-4385\" src=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675801794_c184a12872_c.jpg\" width=\"800\" height=\"450\" alt=\"20131104_084939\" srcset=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675801794_c184a12872_c.jpg 800w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675801794_c184a12872_c-300x169.jpg 300w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675801794_c184a12872_c-768x432.jpg 768w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675801794_c184a12872_c-640x360.jpg 640w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Today some of us managed to have the brief opportunity to visit an anechoic chamber in Imperial College at the Centre for Bio-inspired Technology. However, I must admit that I would classify it more as a semi-anechoic chamber as it had a solid floor (probably due to the need to hold heavy laser equipment and other machinery in the room). Nevertheless, it was very interesting to see it in person.<\/p>\n<p><center><img loading=\"lazy\" class=\"alignnone size-full wp-image-4387\" src=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675900884_8f1328bafc_c.jpg\" width=\"800\" height=\"450\" alt=\"20131104_092201\" srcset=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675900884_8f1328bafc_c.jpg 800w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675900884_8f1328bafc_c-300x169.jpg 300w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675900884_8f1328bafc_c-768x432.jpg 768w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675900884_8f1328bafc_c-640x360.jpg 640w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/center><img loading=\"lazy\" class=\"alignnone size-full wp-image-4389\" src=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675868954_9e794c2aa3_c.jpg\" width=\"800\" height=\"450\" alt=\"20131104_091805\" srcset=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675868954_9e794c2aa3_c.jpg 800w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675868954_9e794c2aa3_c-300x169.jpg 300w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675868954_9e794c2aa3_c-768x432.jpg 768w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675868954_9e794c2aa3_c-640x360.jpg 640w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Radiation absorbent material (RAM)<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-4392\" src=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675843226_fc12b06e2c_c.jpg\" width=\"800\" height=\"450\" alt=\"20131104_091724\" srcset=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675843226_fc12b06e2c_c.jpg 800w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675843226_fc12b06e2c_c-300x169.jpg 300w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675843226_fc12b06e2c_c-768x432.jpg 768w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675843226_fc12b06e2c_c-640x360.jpg 640w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>To me, the room itself is visually impressive for its many striking angles. Which of course brings me to thinking of other &#8220;anechoic chambers&#8221; or radiation absorbing materials and its functions &#8211; not just for sound, but also other waveforms such as microwaves or radio waves (in the case of radar). The &#8220;look&#8221; of such rooms is not so much a design as it is functional. This sort of faceted\/angular plane alignment helps reduce the &#8220;signature&#8221; of the interior space\/object, because a curved surface usually reflects waves in a number of different directions whereas a singular plane will reflect them in one direction. As a result many examples of stealth ships and planes designed for military use have a particular look in order to minimise the directions in which radar signals will be reflected. Because there are only sharp angles and planes, this form of &#8220;purpose shaping&#8221; (as they call it) means that the surfaces that will inadvertently reflect energy can be designed to create some sort of &#8220;<a href=\"http:\/\/www.radartutorial.eu\/18.explanations\/ex47.en.html\">cone-of-silence<\/a>&#8221; with regards to the object, as well as its intended direction of motion.<\/p>\n<p><center><img loading=\"lazy\" class=\"alignnone size-full wp-image-4395\" src=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676519343_a350d61414_c.jpg\" width=\"800\" height=\"498\" alt=\"F-117_Nighthawk_Front\" srcset=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676519343_a350d61414_c.jpg 800w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676519343_a350d61414_c-300x187.jpg 300w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676519343_a350d61414_c-768x478.jpg 768w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676519343_a350d61414_c-640x398.jpg 640w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/center>Lockheed F-117 Nighthawk (Image source: Wikimedia Commons)<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-4397\" src=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676665063_58d79c2fe6_o.jpg\" width=\"798\" height=\"504\" alt=\"K32_HMS_Helsingborg_Anchored-of-Gotska-Sandoen_cropped\" srcset=\"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676665063_58d79c2fe6_o.jpg 798w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676665063_58d79c2fe6_o-300x189.jpg 300w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676665063_58d79c2fe6_o-768x485.jpg 768w, https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10676665063_58d79c2fe6_o-640x404.jpg 640w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p>\n<p>Visby Corvette (Image source: Wikimedia Commons)<br \/>\nThanks to the guys at Imperial for letting us visit their room and thanks to Sam for organising the visit.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Today some of us managed to have the brief opportunity to visit an anechoic chamber in Imperial College at the Centre for Bio-inspired Technology. However, I must admit that I would classify it more as a semi-anechoic chamber as it had a solid floor (probably due to the need to hold heavy laser equipment and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4385,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[560,561,555,15,558,556,557,559],"jetpack_featured_media_url":"https:\/\/dbbd.sg\/blog\/wp-content\/uploads\/2022\/03\/10675801794_c184a12872_c.jpg","_links":{"self":[{"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/posts\/238"}],"collection":[{"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/comments?post=238"}],"version-history":[{"count":1,"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/posts\/238\/revisions"}],"predecessor-version":[{"id":4398,"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/posts\/238\/revisions\/4398"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/media\/4385"}],"wp:attachment":[{"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/media?parent=238"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/categories?post=238"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dbbd.sg\/blog\/wp-json\/wp\/v2\/tags?post=238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}