{"id":4775,"date":"2015-03-23T01:05:11","date_gmt":"2015-03-23T00:05:11","guid":{"rendered":"http:\/\/www.maurograziani.org\/wordpress\/?p=4775"},"modified":"2025-08-22T18:16:14","modified_gmt":"2025-08-22T16:16:14","slug":"il-volo-silenzioso","status":"publish","type":"post","link":"https:\/\/maurograziani.org\/wordpress\/archives\/4775","title":{"rendered":"Il volo silenzioso"},"content":{"rendered":"<p><a href=\"https:\/\/maurograziani.org\/wordpress\/wp-content\/opt1320604657f.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-4778\" style=\"float: right; margin: 10px 20px;\" title=\"opt1320604657f\" src=\"https:\/\/maurograziani.org\/wordpress\/wp-content\/opt1320604657f.png\" alt=\"owl\" width=\"200\" height=\"101\" srcset=\"https:\/\/maurograziani.org\/wordpress\/wp-content\/opt1320604657f.png 1297w, https:\/\/maurograziani.org\/wordpress\/wp-content\/opt1320604657f-150x75.png 150w, https:\/\/maurograziani.org\/wordpress\/wp-content\/opt1320604657f-300x150.png 300w, https:\/\/maurograziani.org\/wordpress\/wp-content\/opt1320604657f-1024x514.png 1024w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><\/a><\/p>\n<p>Il gufo riesce a volare in perfetto silenzio.<\/p>\n<p>Inaudibile anche in cuffia, nonostante debba passare a pochi centimetri da un nutrito set di microfoni (e che microfoni) in un ambiente di test gi\u00e0 silenzioso di suo. Le sue ali muovono l&#8217;aria senza generare alcun picco.<\/p>\n<p>NB: NON &#8220;alcun picco a frequenze udibili&#8221;, ma proprio nessun picco. La registrazione \u00e8 una linea praticamente dritta (vedi il secondo video).<\/p>\n<p>Tratto dal programma di BBC Two <a href=\"http:\/\/www.bbc.co.uk\/programmes\/b054fn09\" target=\"_blank\" rel=\"noopener noreferrer\"><em>Natural World<\/em><\/a>. Segnalato da Lucia.<\/p>\n<p>In questo breve video c&#8217;\u00e8 l&#8217;essenza dell&#8217;esperimento.<\/p>\n<p><iframe loading=\"lazy\" title=\"The silent flight of an owl - Natural World: Super Powered Owls Preview - BBC Two\" width=\"584\" height=\"329\" src=\"https:\/\/www.youtube.com\/embed\/-WigEGNnuTE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>&nbsp;<\/p>\n<p>Qui abbiamo un video un po&#8217; pi\u00f9 completo con qualche commento.<\/p>\n<p><iframe loading=\"lazy\" title=\"Owl Shows Off Silent Flight Superpower\" width=\"584\" height=\"329\" src=\"https:\/\/www.youtube.com\/embed\/6pWub12DUoU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<div class=\"related-posts\">\n<div id=\"related-posts-MRP_all\" class=\"related-posts-type\">\n<h3>RELATED:<\/h3>\n<ul>\n<li><a href=\"https:\/\/maurograziani.org\/wordpress\/archives\/2481\">Canti delle balene in tempo reale<\/a><\/li>\n<\/ul><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Il gufo riesce a volare in perfetto silenzio. Inaudibile anche in cuffia, nonostante debba passare a pochi centimetri da un nutrito set di microfoni (e che microfoni) in un ambiente di test gi\u00e0 silenzioso di suo. Le sue ali muovono &hellip; <a href=\"https:\/\/maurograziani.org\/wordpress\/archives\/4775\">Continua a leggere<span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[22],"tags":[655,892],"class_list":["post-4775","post","type-post","status-publish","format-standard","hentry","category-audio","tag-ornitologia","tag-natura"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/posts\/4775"}],"collection":[{"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/comments?post=4775"}],"version-history":[{"count":16,"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/posts\/4775\/revisions"}],"predecessor-version":[{"id":5500,"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/posts\/4775\/revisions\/5500"}],"wp:attachment":[{"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/media?parent=4775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/categories?post=4775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/maurograziani.org\/wordpress\/wp-json\/wp\/v2\/tags?post=4775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}