{"id":1862,"date":"2011-07-19T00:00:00","date_gmt":"1999-11-30T00:00:00","guid":{"rendered":"http:\/\/www.sicdigital.com.ar\/?p=1862"},"modified":"2011-07-19T00:00:00","modified_gmt":"1999-11-30T00:00:00","slug":"disea%c2%91o-elementos-para-acondicionamiento-acaostico","status":"publish","type":"post","link":"https:\/\/sicdigital.com.ar\/sic\/disea%c2%91o-elementos-para-acondicionamiento-acaostico\/","title":{"rendered":"DISE\u00c3\u0091O: Elementos para acondicionamiento ac\u00c3\u00bastico"},"content":{"rendered":"<p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal<\/w:View> <w:Zoom>0<\/w:Zoom> <w:TrackMoves \/> <w:TrackFormatting \/> <w:HyphenationZone>21<\/w:HyphenationZone> <w:PunctuationKerning \/> <w:ValidateAgainstSchemas \/> <w:SaveIfXMLInvalid>false<\/w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false<\/w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false<\/w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF \/> <w:LidThemeOther>ES<\/w:LidThemeOther> 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5.4pt; \tmso-para-margin:0cm; \tmso-para-margin-bottom:.0001pt; \tmso-pagination:widow-orphan; \tfont-size:11.0pt; \tfont-family:\"Calibri\",\"sans-serif\"; \tmso-ascii-font-family:Calibri; \tmso-ascii-theme-font:minor-latin; \tmso-fareast-font-family:\"Times New Roman\"; \tmso-fareast-theme-font:minor-fareast; \tmso-hansi-font-family:Calibri; \tmso-hansi-theme-font:minor-latin; \tmso-bidi-font-family:\"Times New Roman\"; \tmso-bidi-theme-font:minor-bidi;} --> <!--[endif] --><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" style=\"float: left; margin: 5px;\" src=\"\/v1\/fotos\/19072011011.jpg\" alt=\"\" width=\"370\" height=\"684\" \/><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&iquest;A qu&eacute; se denomina difusi&oacute;n? &iquest;Y absorci&oacute;n? &iquest;Cu&aacute;l es la diferencia entre un difusor y un absorbente? &iquest;Cu&aacute;ndo se usa cada uno? Algunos datos &uacute;tiles y preguntas frecuentes sobre acondicionamiento ac&uacute;stico, para tener en cuenta a la hora de construir y dise&ntilde;ar un espacio. <\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span style=\"text-decoration: underline;\"><span style=\"text-decoration: none;\">&nbsp;<\/span><\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span style=\"text-decoration: underline;\">&iquest;Qu&eacute; es la Difusi&oacute;n?<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">Seg&uacute;n las teor&iacute;as cl&aacute;sicas, la difusi&oacute;n es el efecto de redistribuir espacialmente la energ&iacute;a ac&uacute;stica que incide sobre una superficie. Recientemente se advirti&oacute; que este concepto describe en forma incompleta el funcionamiento de un Difusor debido a la existencia de redistribuci&oacute;n temporal en cierto tipo de difusores desarrollados para optimizaci&oacute;n de acondicionamientos ac&uacute;sticos. En el 1er Congreso Latinoamericano de AES se present&oacute; una definici&oacute;n m&aacute;s completa del fen&oacute;meno Difusi&oacute;n: &ldquo;es el efecto de diseminar la energ&iacute;a ac&uacute;stica incidente sobre una superficie en el espacio y en el tiempo&rdquo;.<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span style=\"text-decoration: underline;\">&iquest;C&oacute;mo se comparan las superficies difusoras entre s&iacute;?<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">Existen 2 (dos) formas de evaluar una superficie difusora:<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">a) Mediante el patr&oacute;n polar de la reflexi&oacute;n sobre la misma desde varios &aacute;ngulos de incidencia. Aquella superficie que produzca una figura semejante a una semicircunferencia ser&aacute; la que &ldquo;supuestamente&rdquo; posee mejores caracter&iacute;sticas de diseminaci&oacute;n de la energ&iacute;a en el espacio.<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">e) Evaluando el coeficiente de difusi&oacute;n, el cual es aquella porci&oacute;n de energ&iacute;a que no es absorbida ni reflejada en forma especular desde la superficie bajo prueba para varios &aacute;ngulos de incidencia.<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">Ambos par&aacute;metros no tienen todav&iacute;a el consenso generalizado de la comunidad cient&iacute;fica, porque presentan diferentes tipos de errores en su concepci&oacute;n o medici&oacute;n. Ninguno de las anteriores magnitudes f&iacute;sicas eval&uacute;a el efecto del Difusor sobre el campo ac&uacute;stico. Con el objetivo de cubrir este vac&iacute;o te&oacute;rico&ndash;pr&aacute;ctico se present&oacute; en el 1er Congreso de ASA &ndash; FIA &ndash;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">IMA en Canc&uacute;n, en el a&ntilde;o 2000, el &ldquo;coeficiente de difusividad sonora subjetiva en un punto del campo ac&uacute;stico (SFD)&rdquo;, brindando una posibilidad de evaluar el grado de difusi&oacute;n existente en el mismo, para as&iacute; poder reproducirlo en otros recintos.<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span style=\"text-decoration: underline;\">&iquest;Qu&eacute; tipos de difusores hay?<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">La Difusi&oacute;n sobre una pared, placa o superficie es un efecto producto de la existencia de &ldquo;gradientes de impedancia ac&uacute;stica superficial&rdquo;, dicho simplemente se obtiene con s&oacute;lo colocar superficies con diferentes coeficientes de absorci&oacute;n una al lado de otra. Sin embargo &iquest;Cu&aacute;l ser&aacute; el patr&oacute;n de reflexi&oacute;n que presentar&aacute; un difusor &ldquo;hecho en casa&rdquo;? &iquest;Generar&aacute;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">alg&uacute;n tipo de focalizaci&oacute;n o refuerzo sonoro indeseado en alg&uacute;n punto del recinto?, etc.. En definitiva, lo que se desconoce de ese difusor es su patr&oacute;n polar o cu&aacute;n optimizado est&aacute; (cu&aacute;nto se asemeja a una semicircunferencia). Es por esto que podemos dividir la gran familia de Difusores existentes en No Optimizados y Optimizados. Los primeros devienen de formas irregulares aleatorias, de la colocaci&oacute;n de materiales con diferentes coeficientes de absorci&oacute;n uno al lado de otro y de aquellas formas geom&eacute;tricas que<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">diseminan la energ&iacute;a mayoritariamente en el espacio y minoritariamente en el tiempo; estos &uacute;ltimos son los Difusores conocidos como Cil&iacute;ndricos y\/o Poli cil&iacute;ndricos. Los &Oacute;ptimos son aquellos generados por secuencias num&eacute;ricas (basadas todas en n&uacute;meros primos) que logran maximizar simult&aacute;neamente la diseminaci&oacute;n espacial y la temporal dentro de un ancho de banda espec&iacute;fico.<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span style=\"text-decoration: underline;\"><span style=\"text-decoration: none;\">&nbsp;<\/span><\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span style=\"text-decoration: underline;\">&iquest;Qu&eacute; diferencia hay entre un Absorbente y un Difusor?<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">La absorci&oacute;n eliminar&aacute; la energ&iacute;a ac&uacute;stica excedente dentro del recinto mientras que la difusi&oacute;n redistribuir&aacute; la energ&iacute;a necesaria en el espacio y en el tiempo. La diseminaci&oacute;n de la energ&iacute;a ac&uacute;stica en el tiempo, corregir&aacute; las imperfecciones de un decay (ll&aacute;mense ausencia de reflexiones en algunos instantes, existencia de reflexiones fuertes), etc. Espacialmente hablando, implicar&aacute; distribuir uniformemente la energ&iacute;a dentro de una sala, ampliando los puntos de escucha, eliminando &ldquo;dead spots&rdquo;, etc.<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span style=\"text-decoration: underline;\">&iquest;Difusores o Absorbentes?<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">Ambas herramientas ac&uacute;sticas son distintas y proveen diferentes resultados. No es mejor una que otra y son complementarias de acuerdo al uso que se le quiere dar al recinto. Si se pretende agrandar una imagen sonora o darle un decay controlado, que no &ldquo;coloree&rdquo; el sonido, a un ambiente &ldquo;ac&uacute;sticamente dise&ntilde;ado&rdquo; (Forma geom&eacute;trica, tiempo de reverberaci&oacute;n, resonancias de bajas frecuencias, ondas estacionarias, etc.) tambi&eacute;n se le deben incorporar elementos difusores. <\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">&nbsp;<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span lang=\"EN-GB\">Lic. Haroldo O. Da Riva<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\"><span lang=\"EN-GB\">Sound and Acoustic Engineer.<\/span><\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"font-size: 12px;\">Resumen presentado sobre la base de informaci&oacute;n recopilada de:<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"text-align: justify;\"><span style=\"font-size: 12px;\"><span style=\"font-family: \">Bibliograf&iacute;a y congresos de Ingenier&iacute;a Ac&uacute;stica, informes suministrados en la Universidad de Salford Manchester UK, materiales espec&iacute;ficos de Ing. A. Birondo y Dr. Peter D&#8217;Antonio, y experiencias, ensayos y comprobaciones realizadas por SONEX S.A. &ndash; ACUSTEC en los laboratorios, estudios de Grabaci&oacute;n y auditorios.<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&iquest;A qu&eacute; se denomina difusi&oacute;n? &iquest;Y absorci&oacute;n? &iquest;Cu&aacute;l es la diferencia entre un difusor y un absorbente? &iquest;Cu&aacute;ndo se usa cada uno? Algunos datos &uacute;tiles y preguntas frecuentes sobre acondicionamiento ac&uacute;stico, para tener en cuenta a la hora de construir y dise&ntilde;ar un espacio. &nbsp; &nbsp; &iquest;Qu&eacute; es la Difusi&oacute;n? &nbsp; Seg&uacute;n las teor&iacute;as cl&aacute;sicas, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_joinchat":[],"footnotes":""},"categories":[22],"tags":[42,43,44,45,47,48],"class_list":["post-1862","post","type-post","status-publish","format-standard","hentry","category-archivo","tag-arquitectura-2","tag-arqquitectura","tag-construccion","tag-diseno","tag-obra-publica-2","tag-plan-vivienda","et-doesnt-have-format-content","et_post_format-et-post-format-standard"],"_links":{"self":[{"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/posts\/1862","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/comments?post=1862"}],"version-history":[{"count":0,"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/posts\/1862\/revisions"}],"wp:attachment":[{"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/media?parent=1862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/categories?post=1862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sicdigital.com.ar\/sic\/wp-json\/wp\/v2\/tags?post=1862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}