{"id":522,"date":"2022-03-19T23:50:50","date_gmt":"2022-03-19T23:50:50","guid":{"rendered":"https:\/\/2022.robocupjunior.eu\/rcj\/?page_id=522"},"modified":"2022-06-27T15:12:32","modified_gmt":"2022-06-27T15:12:32","slug":"ofi-19-pratos-chladni","status":"publish","type":"page","link":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/oficinas\/som\/ofi-19-pratos-chladni\/","title":{"rendered":"Pratos Chladni"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:80%\"><figure class=\"wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"450\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/harvardchladni.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" style=\"object-fit:cover;\" srcset=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/harvardchladni.jpg 660w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/harvardchladni-300x205.jpg 300w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;flex-basis:20%\">\n<!-- START Kaya QR Code Generator --><div class=\"wpkqcg_qrcode_wrapper\"><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_1869d6e54fddefa34_ecclevel\" value=\"L\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_1869d6e54fddefa34_size\" value=\"\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_1869d6e54fddefa34_color\" value=\"\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_1869d6e54fddefa34_bgcolor\" value=\"\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_1869d6e54fddefa34_content\" value=\"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/522\" \/><img decoding=\"async\" src=\"\" id=\"wpkqcg_qrcode_outputimg_1869d6e54fddefa34\" alt=\"QR Code\" class=\"wpkqcg_qrcode\" style=\"width: auto; height: auto; max-width: 100%;\" ><div style=\"clear: none;\"><\/div><\/div><!-- END Kaya QR Code Generator -->\n<\/div>\n<\/div>\n\n\n<h2 class=\"wp-block-post-title\">Pratos Chladni<\/h2>\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Pratos Chladni\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/8bC4-xu1R2M?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>\n<\/div><\/figure>\n\n\n\n<p>Os pratos de Chladni permitem-nos visualizar os efeitos das vibra\u00e7\u00f5es nas superf\u00edcies mec\u00e2nicas.<\/p>\n\n\n\n<p><strong>Componentes:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Areia<\/li><li>Chapa met\u00e1lica<\/li><li>Gerador de som<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Princ\u00edpio-de-funcionamento:\">Princ\u00edpio de funcionamento:<\/h2>\n\n\n\n<p>O cientista, m\u00fasico e construtor de instrumentos musicais Ernst Chladni (1756-1827) produziu placas de Chladni no final do s\u00e9culo XVIII para demonstrar os complexos padr\u00f5es de vibra\u00e7\u00f5es de ondas que podem ocorrer em objectos bidimensionais.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"236\" height=\"284\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/forming-chladni-patterns-technique.png\" alt=\"\" class=\"wp-image-520\"\/><\/figure>\n\n\n\n<p>As placas de ferro vibram pela a\u00e7\u00e3o de um arco de violino. Quando uma placa \u00e9 \u201ctocada\u201d ressoa a uma das suas frequ\u00eancias naturais. O investigador salpica a seguir areia fina sobre a placa, que salta at\u00e9 se fixar em pontos nodais (\u00e1reas de movimento zero), resultando em padr\u00f5es elaborados como o que se mostra abaixo.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-medium is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni-pattern-1-300x300.png\" alt=\"\" class=\"wp-image-518\" width=\"267\" height=\"267\" srcset=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni-pattern-1-300x300.png 300w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni-pattern-1-150x150.png 150w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni-pattern-1-768x768.png 768w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni-pattern-1.png 1000w\" sizes=\"auto, (max-width: 267px) 100vw, 267px\" \/><\/figure>\n\n\n\n<p>No seu livro<em> Die Akustic<\/em>, ele descreve esta abordagem de visualiza\u00e7\u00e3o (publicado em 1802).<\/p>\n\n\n\n<p>Em teoria, qualquer placa pode ter um n\u00famero infinito de modos de vibra\u00e7\u00e3o, cada um dos quais corresponde a uma frequ\u00eancia sonora diferente. Cada modo gera um padr\u00e3o distinto, que cresce em complexidade \u00e0 medida que a frequ\u00eancia de vibra\u00e7\u00e3o aumenta. A forma dos padr\u00f5es criados numa determinada placa \u00e9 determinada por uma variedade de par\u00e2metros, incluindo a forma da placa. A imagem do livro de Chladni d\u00e1 uma ideia da gama de padr\u00f5es conceb\u00edveis.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"312\" height=\"380\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni_illustration.jpg\" alt=\"\" class=\"wp-image-517\" srcset=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni_illustration.jpg 312w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/chladni_illustration-246x300.jpg 246w\" sizes=\"auto, (max-width: 312px) 100vw, 312px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Instru\u00e7\u00f5es:\">Instru\u00e7\u00f5es:<\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li>Coloque uma fina camada de areia no topo da placa<\/li><li>Gere som com diferentes frequ\u00eancias<\/li><li>Observe os diferentes padr\u00f5es<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Links:\">Links:<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=lRFysSAxWxI\">Chladni Plates<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=CR_XL192wXw\">Chladni Figures &#8211; random couscous snaps into beautiful patterns<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=tFAcYruShow\">Cymatics: Chladni Plate &#8211; Sound, Vibration and Sand<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.whipplemuseum.cam.ac.uk\/explore-whipple-collections\/acoustics\/ernst-chladni-physicist-musician-and-musical-instrument-maker\">Ernst Chladni: Physicist, Musician and Musical Instrument Maker<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/publicdomainreview.org\/collection\/chladni-figures-1787\">Chladni Figures (1787)<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/americanhistory.si.edu\/science\/chladni.htm\">Smithsonian &#8211; Chladni Plates<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/blogs.scientificamerican.com\/but-seriously\/chladni-figures-amazing-resonance-experiment\/\">Chladni Figures: Amazing Resonance Experiment<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.comsol.com\/blogs\/how-do-chladni-plates-make-it-possible-to-visualize-sound\/\">How Do Chladni Plates Make It Possible to Visualize Sound?<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/web2.ph.utexas.edu\/~coker2\/index.files\/chladni.htm\">Physics 341 Illusions<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Os pratos de Chladni permitem-nos visualizar os efeitos das vibra\u00e7\u00f5es nas superf\u00edcies mec\u00e2nicas. Componentes: Areia Chapa met\u00e1lica Gerador de som Princ\u00edpio de funcionamento: O cientista, m\u00fasico e construtor de instrumentos musicais Ernst Chladni (1756-1827) produziu placas de Chladni no final do s\u00e9culo XVIII para demonstrar os complexos padr\u00f5es de vibra\u00e7\u00f5es de ondas que podem ocorrer [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":519,"parent":227,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-522","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/comments?post=522"}],"version-history":[{"count":4,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/522\/revisions"}],"predecessor-version":[{"id":1028,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/522\/revisions\/1028"}],"up":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/227"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/media\/519"}],"wp:attachment":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/media?parent=522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}