{"id":230945,"date":"2025-06-23T09:00:00","date_gmt":"2025-06-23T07:00:00","guid":{"rendered":"https:\/\/www.horendgoed.nl\/sem-categoria\/o-que-e-um-decibel\/"},"modified":"2025-06-24T09:49:58","modified_gmt":"2025-06-24T07:49:58","slug":"o-que-e-um-decibel","status":"publish","type":"post","link":"https:\/\/www.horendgoed.nl\/pt-pt\/noticias-e-antecedentes\/o-que-e-um-decibel\/","title":{"rendered":"O que \u00e9 um decibel?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ouves frequentemente o termo: <em>decib\u00e9is<\/em>. Em concertos, em avi\u00f5es, quando se trata de prote\u00e7\u00e3o auditiva ou quando compras um aspirador. Mas o que significa exatamente? O que \u00e9 um decibel, de onde vem e porque \u00e9 t\u00e3o importante quando falamos de audi\u00e7\u00e3o e som?   <\/p>\n\n<p class=\"wp-block-paragraph\">Neste blogue, mergulhamos no mundo dos decib\u00e9is de uma forma acess\u00edvel. N\u00e3o \u00e9 uma li\u00e7\u00e3o de ci\u00eancia \u00e1rida, mas explica\u00e7\u00f5es \u00fateis que te ajudar\u00e3o a compreender melhor o som e a prote\u00e7\u00e3o auditiva. <\/p>\n\n<h2 class=\"wp-block-heading\">Som: vibra\u00e7\u00e3o no ar<\/h2>\n\n<p class=\"wp-block-paragraph\">Para perceberes o que \u00e9 um decibel, vamos primeiro olhar para o som em si. O som n\u00e3o \u00e9 mais do que vibra\u00e7\u00f5es que se movem atrav\u00e9s do ar (ou de qualquer outro meio). O teu ouvido capta essas vibra\u00e7\u00f5es e o teu c\u00e9rebro converte-as em \u201csom\u201d.  <\/p>\n\n<p class=\"wp-block-paragraph\">Algumas vibra\u00e7\u00f5es s\u00e3o suaves, outras s\u00e3o duras como uma rocha. Pensa na diferen\u00e7a entre o farfalhar das folhas e o rugido de um avi\u00e3o de combate. Expressamos o qu\u00e3o alto ou suave \u00e9 um som em decib\u00e9is (dB).  <\/p>\n\n<h2 class=\"wp-block-heading\">OK, mas ent\u00e3o o que \u00e9 um decibel?<\/h2>\n\n<p class=\"wp-block-paragraph\">O decibel \u00e9 uma unidade que representa a intensidade de um som. Mas n\u00e3o \u00e9 uma escala normal, como podes estar habituado. \u00c9 uma <strong>escala logar\u00edtmica<\/strong>. Parece complicado, mas significa simplesmente: por cada 10 decib\u00e9is a mais, o som torna-se <strong>10 vezes mais intenso<\/strong>.   <\/p>\n\n<p class=\"wp-block-paragraph\">Ent\u00e3o:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>30 dB n\u00e3o \u00e9 \u201cum pouco mais alto\u201d do que 20 dB, mas sim <strong>10 vezes mais intenso<\/strong><\/li>\n\n\n\n<li>40 dB \u00e9 <strong>100 vezes<\/strong> mais intenso do que 20 dB<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Parece il\u00f3gico, mas isso deve-se ao facto de a nossa audi\u00e7\u00e3o funcionar de forma logar\u00edtmica. Percebemos uma duplica\u00e7\u00e3o do volume n\u00e3o como \u201cduas vezes mais alto\u201d, mas como \u201cum pouco mais alto\u201d. Por isso, a escala de decib\u00e9is \u00e9 ajustada em conformidade.  <\/p>\n\n<h2 class=\"wp-block-heading\">O que \u00e9 que esses n\u00fameros significam na pr\u00e1tica?<\/h2>\n\n<p class=\"wp-block-paragraph\">Apenas alguns exemplos para te ajudar a concretizar:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>10 dB: respira\u00e7\u00e3o<\/li>\n\n\n\n<li>20 dB: sussurro<\/li>\n\n\n\n<li>30 dB: ru\u00eddo suave<\/li>\n\n\n\n<li>40 dB: biblioteca silenciosa<\/li>\n\n\n\n<li>60 dB: conversa\u00e7\u00e3o normal<\/li>\n\n\n\n<li>85 dB: tr\u00e1fego intenso<\/li>\n\n\n\n<li>100 dB: concerto de rock (sem tamp\u00f5es para os ouvidos!)<\/li>\n\n\n\n<li>120 dB: sirene de curto alcance<\/li>\n\n\n\n<li>140 dB: avi\u00e3o de combate a 30 metros de dist\u00e2ncia<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">A partir dos <strong>85 decib\u00e9is<\/strong>, o risco de les\u00f5es auditivas torna-se real se estiveres exposto a esses valores durante longos per\u00edodos de tempo. Por conseguinte, este \u00e9 tamb\u00e9m o limite a partir do qual a prote\u00e7\u00e3o auditiva se torna obrigat\u00f3ria no local de trabalho. <\/p>\n\n<h2 class=\"wp-block-heading\">Al\u00e9m disso, porque \u00e9 que \u00e0s vezes ouves \u201cA\u201d depois de dB?<\/h2>\n\n<p class=\"wp-block-paragraph\">Por vezes, v\u00ea a indica\u00e7\u00e3o \u201cdB(A)\u201d. Esta \u00e9 uma unidade de medida modificada em que o som \u00e9 ponderado com base na forma como o ouvido humano o percepciona. N\u00e3o ouvimos todas as frequ\u00eancias da mesma forma. A escala dB(A) filtra as frequ\u00eancias \u00e0s quais o nosso ouvido \u00e9 menos sens\u00edvel, pelo que obt\u00e9m uma imagem mais realista daquilo que uma pessoa realmente sente em termos de intensidade sonora.   <\/p>\n\n<p class=\"wp-block-paragraph\">Na maioria das situa\u00e7\u00f5es que envolvem a audi\u00e7\u00e3o, utiliza-se o <strong>dB(A)<\/strong>. Por exemplo, quando medes o ru\u00eddo do tr\u00e2nsito, das m\u00e1quinas ou o volume de um festival. <\/p>\n\n<h2 class=\"wp-block-heading\">Qual \u00e9 o problema com demasiados decib\u00e9is?<\/h2>\n\n<p class=\"wp-block-paragraph\">Os nossos ouvidos s\u00e3o sens\u00edveis. E embora possam aguentar bastante, a exposi\u00e7\u00e3o prolongada a sons altos \u00e9 realmente prejudicial. Qualquer coisa acima de <strong>85 dB<\/strong> pode causar danos auditivos ao longo do tempo. E quanto mais alto for o som, mais curto \u00e9 o tempo necess\u00e1rio para que os danos ocorram:   <\/p>\n\n<ul class=\"wp-block-list\">\n<li>A 85 dB, podes ouvir durante cerca de 8 horas sem sofrer danos<\/li>\n\n\n\n<li>A 100 dB, s\u00e3o apenas 15 minutos<\/li>\n\n\n\n<li>A 110 dB, est\u00e1s em risco ap\u00f3s apenas alguns minutos<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">E isto sem ter em conta a sensibilidade individual. Algumas pessoas t\u00eam sintomas mesmo com uma exposi\u00e7\u00e3o mais curta ou com volumes mais baixos. <\/p>\n\n<h2 class=\"wp-block-heading\">Que tipo de les\u00f5es auditivas podes sofrer?<\/h2>\n\n<p class=\"wp-block-paragraph\">As formas mais comuns s\u00e3o:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/problemas-de-audicao\/tudo-sobre-tinnitus\/\" data-type=\"post\" data-id=\"9809\" target=\"_blank\" rel=\"noreferrer noopener\">Tinnitus<\/a><\/strong> (um chiar, assobio ou zumbido constante no teu ouvido)<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/problemas-de-audicao\/hiperacusia-hipersensibilidade-ao-som\/\" data-type=\"post\" data-id=\"12477\" target=\"_blank\" rel=\"noreferrer noopener\">Hiperacusia<\/a><\/strong> (hipersensibilidade ao som)<\/li>\n\n\n\n<li><strong>Perda de audi\u00e7\u00e3o perceptiva<\/strong> (danos permanentes nas c\u00e9lulas ciliadas do teu ouvido interno)<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Estes danos s\u00e3o geralmente <strong>irrevers\u00edveis<\/strong>. O que est\u00e1 estragado n\u00e3o melhora. \u00c9 por isso que a preven\u00e7\u00e3o - como a prote\u00e7\u00e3o auditiva - \u00e9 t\u00e3o importante.  <\/p>\n\n<h2 class=\"wp-block-heading\">Como \u00e9 que medes os decib\u00e9is?<\/h2>\n\n<p class=\"wp-block-paragraph\">Existem aplica\u00e7\u00f5es \u00fateis que te permitem medir aproximadamente a intensidade do ru\u00eddo no teu ambiente, mas uma medi\u00e7\u00e3o profissional \u00e9 feita com um <strong>decibel\u00edmetro<\/strong>. Este mede com precis\u00e3o a quantidade de ru\u00eddo existente num determinado local. Isto pode ser \u00fatil em locais de trabalho, salas de concerto, salas de aula ou mesmo infant\u00e1rios.  <\/p>\n\n<p class=\"wp-block-paragraph\">Os fabricantes de electrodom\u00e9sticos tamb\u00e9m indicam cada vez mais a quantidade de dB que produzem. Pensa nos aspiradores, nas m\u00e1quinas de lavar lou\u00e7a ou nos aparelhos de ar condicionado. <\/p>\n\n<h2 class=\"wp-block-heading\">Prote\u00e7\u00e3o auditiva: o que \u00e9 que realmente ajuda?<\/h2>\n\n<p class=\"wp-block-paragraph\">Se queres proteger a tua audi\u00e7\u00e3o, \u00e9 inteligente saber at\u00e9 que ponto o produto abafa. Os protectores auditivos t\u00eam muitas vezes um <strong>valor SNR<\/strong>: esta \u00e9 a atenua\u00e7\u00e3o m\u00e9dia em dB que o produto oferece. Imagina que est\u00e1s num festival com 100 dB e est\u00e1s a usar tamp\u00f5es para os ouvidos com um SNR de 25 dB. Ainda assim, o teu t\u00edmpano fica com 75 dB - muito mais seguro.   <\/p>\n\n<p class=\"wp-block-paragraph\">Para uso di\u00e1rio, podes escolher entre:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/webshop\/protecao-auditiva\/tampoes-para-os-ouvidos\/\" target=\"_blank\" rel=\"noreferrer noopener\">Tamp\u00f5es de ouvido universais<\/a><\/strong>Ideal para festivais, concertos e viagens<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/shop\/protecao-auditiva\/protecao-auditiva-personalizada\/protecao-auditiva-personalizada\/\" target=\"_blank\" rel=\"noreferrer noopener\">Tamp\u00f5es para os ouvidos feitos \u00e0 medida<\/a><\/strong>: para m\u00fasicos, DJs, empregados em profiss\u00f5es ruidosas<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/webshop\/protecao-auditiva\/protectores-de-ouvido-pt-pt\/\" target=\"_blank\" rel=\"noreferrer noopener\">Prote\u00e7\u00e3o auditiva sobre os ouvidos<\/a><\/strong>como os protectores auriculares, para crian\u00e7as ou para volumes muito altos<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Nota: <a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/webshop\/protecao-auditiva\/tampoes-para-os-ouvidos\/\" target=\"_blank\" rel=\"noreferrer noopener\">os tamp\u00f5es para os<\/a> ouvidos t\u00eam de ficar bem colocados no ouvido para atenuarem o som. Tamp\u00f5es mal colocados mal atenuam. <\/p>\n\n<h2 class=\"wp-block-heading\">O que podes fazer para salvar os teus ouvidos?<\/h2>\n\n<p class=\"wp-block-paragraph\">Aqui tens algumas dicas pr\u00e1ticas:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Leva sempre <strong><a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/webshop\/protecao-auditiva\/tampoes-para-os-ouvidos\/\" target=\"_blank\" rel=\"noreferrer noopener\">tamp\u00f5es para os ouvidos<\/a><\/strong> para festivais, concertos ou discotecas<\/li>\n\n\n\n<li><strong>N\u00e3o te aproximes dos altifalantes<\/strong> <\/li>\n\n\n\n<li>D\u00e1 <strong>um descanso<\/strong> aos teus ouvidos durante um longo dia cheio de barulho<\/li>\n\n\n\n<li>De vez em quando, faz um <strong><a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/marca-uma-consulta\/\" data-type=\"page\" data-id=\"161\" target=\"_blank\" rel=\"noreferrer noopener\">teste de audi\u00e7\u00e3o<\/a><\/strong> mesmo que n\u00e3o tenhas queixas<\/li>\n\n\n\n<li>Usa <a href=\"https:\/\/www.horendgoed.nl\/pt-pt\/webshop\/protecao-auditiva\/tampoes-para-os-ouvidos\/\" target=\"_blank\" rel=\"noreferrer noopener\">prote\u00e7\u00e3o auditiva com <strong>filtros de m\u00fasica<\/strong><\/a> se ouvires ou tocares muita m\u00fasica<\/li>\n\n\n\n<li>Ensina aos teus filhos, desde cedo, quais s\u00e3o os n\u00edveis de ru\u00eddo seguros<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Volta ao b\u00e1sico<\/h2>\n\n<p class=\"wp-block-paragraph\">Resumindo: um <strong>decibel<\/strong> \u00e9 uma medida da intensidade do som. \u00c9 uma escala logar\u00edtmica que corresponde \u00e0 forma como sentimos o som. Quanto mais elevado for o n\u00famero de decib\u00e9is, maior \u00e9 o risco de les\u00f5es auditivas - especialmente em caso de exposi\u00e7\u00e3o prolongada.  <\/p>\n\n<p class=\"wp-block-paragraph\">O som est\u00e1 \u00e0 nossa volta. E isso \u00e9 maravilhoso. Mas se queres preservar a tua audi\u00e7\u00e3o - e todos n\u00f3s queremos isso - \u00e9 inteligente viver um pouco consciente dos decib\u00e9is. N\u00e3o tens de abafar tudo. Mas um pouco de prote\u00e7\u00e3o aqui e ali? De certeza que n\u00e3o te vais arrepender mais tarde.     <\/p>\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Neste blogue, mergulhamos no mundo dos decib\u00e9is de uma forma acess\u00edvel. N\u00e3o \u00e9 uma li\u00e7\u00e3o de ci\u00eancia \u00e1rida, mas explica\u00e7\u00f5es \u00fateis que te ajudar\u00e3o a compreender melhor o som e a prote\u00e7\u00e3o auditiva. <\/p>\n","protected":false},"author":1,"featured_media":215669,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[14719],"tags":[16157,14782,14723,14780,14806,14724],"class_list":["post-230945","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias-e-antecedentes","tag-explicacao","tag-ouvidos","tag-protecao-auditiva","tag-protectores-de-ouvido","tag-soar","tag-tampoes-para-os-ouvidos","grid-sizer","latest_post"],"featured_image_src":"https:\/\/www.horendgoed.nl\/wp-content\/uploads\/2025\/05\/wat-is-een-decibel-.jpg","author_info":{"display_name":"Hoorzorg Specialist Sander","author_link":"https:\/\/www.horendgoed.nl\/pt-pt\/author\/sander\/"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>O que \u00e9 um decibel? | Horend Goed Audiciens<\/title>\n<meta name=\"description\" content=\"Neste blogue, mergulhamos no mundo dos decib\u00e9is de uma forma acess\u00edvel. 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