{"id":2463,"date":"2010-02-22T14:37:00","date_gmt":"2010-02-22T11:37:00","guid":{"rendered":"http:\/\/freshgoodminimal.ro\/?p=2463"},"modified":"2010-02-23T17:15:02","modified_gmt":"2010-02-23T14:15:02","slug":"under-ice","status":"publish","type":"post","link":"https:\/\/freshgoodminimal.ro\/?p=2463","title":{"rendered":"Under Ice"},"content":{"rendered":"

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\nDispersion of Sound Waves in Ice Sheets<\/p>\n

“I made this sound recording of a frozen lake in the winter of 2005\/06 in the area around Berlin. Frozen\u00a0lakes are known to give off most noise during major fluctuations in temperature: the ice expands or\u00a0contracts, and the resulting tension in the ice causes cracks to appear. Due to the changes in temperature, the\u00a0hours of morning and evening are usually the best times to hear these sounds. In my experience, thin ice is\u00a0especially interesting for acoustic phenomena; it is more elastic and sounds are propagated better across the\u00a0surface. Snowfall, on the other hand, has a muffling effect and the sound can only travel to a limited extent.\u00a0The ice sheet acts as a huge membrane across which the cracking and popping sounds spread. Underwater\u00a0microphones proved especially well-suited for these recordings: in a small hole drilled close beneath the\u00a0surface of the water, the sounds emitted by the body of ice carry particularly well. The most striking thing\u00a0about these recordings is the synthetic-sounding descending tones caused by the phenomenon of the\u00a0dispersion of sound waves. The high frequencies of the popping and cracking noises are transmitted faster by\u00a0the ice than the deeper frequencies, which reach the listener with a time lag as glissandi sinking to almost\u00a0bottomless depths.”\u00a0silentlistening.wordpress.com<\/a><\/p>\n

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The out-of-this-world sounds made by waddell seals in Antartica from the movie “Encounters at the End of the World” by Werner Herzog. <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Dispersion of Sound Waves in Ice Sheets “I made this sound recording of a frozen lake in the winter of 2005\/06 in the area around Berlin. Frozen\u00a0lakes are known to give off most noise during major fluctuations in temperature: the ice expands or\u00a0contracts, and the resulting tension in the ice causes cracks to appear. Due […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,8],"tags":[],"class_list":["post-2463","post","type-post","status-publish","format-standard","hentry","category-de-dans","category-outfun"],"_links":{"self":[{"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=\/wp\/v2\/posts\/2463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2463"}],"version-history":[{"count":0,"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=\/wp\/v2\/posts\/2463\/revisions"}],"wp:attachment":[{"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/freshgoodminimal.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}