{"id":418261,"date":"2017-06-09T02:00:00","date_gmt":"2017-06-08T23:00:00","guid":{"rendered":"https:\/\/www.fyysika.ee\/?guid=f3b446ae30d1ad8ab3f062da53891684"},"modified":"2017-06-09T02:00:00","modified_gmt":"2017-06-08T23:00:00","slug":"sound-and-vision-visualization-of-music-with-a-soap-film-2","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=418261","title":{"rendered":"Sound and vision: visualization of music with a soap film"},"content":{"rendered":"<p>A vertical soap film, freely suspended at the end of a tube, is vibrated by a sound wave that<br \/>\npropagates in the tube. If the sound wave is a piece of music, the soap film \u2018comes alive\u2019: colours,<br \/>\ndue to iridescences in the soap film, swirl, split and merge in time with the music (see the<br \/>\nsnapshots in figure 1 below). In this article, we analyse the rich physics behind these fascinating<br \/>\ndynamical patterns: it combines the acoustic propagation in a tube, the light interferences, and the<br \/>\nstatic and dynamic properties of soap films. The interaction between the acoustic wave and the<br \/>\nliquid membrane results in capillary waves on the soap film, as well as non-linear effects leading<br \/>\nto a non-oscillatory flow of liquid in the plane of the film, which induces several spectacular<br \/>\neffects: generation of vortices, diphasic dynamical patterns inside the film, and swelling of the<br \/>\nsoap film under certain conditions. Each of these effects is associated with a characteristic time<br \/>\nscale, which inte&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A vertical soap film, freely suspended at the end of a tube, is vibrated by a sound wave that<br \/>\npropagates in the tube. If the sound wave is a piece of music, the soap film \u2018comes alive\u2019: colours,<br \/>\ndue to iridescences in the soap film, swirl, split &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-418261","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/418261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=418261"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/418261\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=418261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=418261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=418261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}