{"id":350,"date":"2020-05-20T14:54:11","date_gmt":"2020-05-20T12:54:11","guid":{"rendered":"http:\/\/www.itaab.com\/?page_id=350"},"modified":"2023-10-04T10:28:02","modified_gmt":"2023-10-04T08:28:02","slug":"acoustics","status":"publish","type":"page","link":"https:\/\/itaab.com\/en\/acoustics\/","title":{"rendered":"Acoustics"},"content":{"rendered":"\n
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Acoustics<\/h1>\n\n\n\n


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Sound Absorption – Metal Ceilings<\/h4>\n\n\n\n

Metal is a hard material and, depending on its design, can have various effects on sound, but it does not inherently possess any sound-absorbing properties.<\/p>\n\n\n\n

Metal ceilings have other unique characteristics.
Aesthetic:<\/strong> Design possibilities in the choice of materials, different metals, expanded metal, surface treatments, perforations, patterns, etc.
Practical:<\/strong> Open area, durability, impact resistance, foldability, recyclability, etc.<\/p>\n\n\n\n

To create a ceiling with good sound absorption, complementary absorbent material is required within or above the metal cassette or directly below the structural floor. Alternatively, the product can be equipped with a sound-absorbing layer.<\/p>\n\n\n\n

Depending on the cassette’s design, perforation rate, choice of expanded metal, open area, and the selection of complementary sound absorber or sound-absorbing layer, the desired level of absorption can be achieved.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

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Sound Absorption Class C<\/h5>\n\n\n\n

By installing a sound-absorbing layer directly in a cassette with at least 20% open area, Sound Absorption Class C is achieved.<\/p>\n\n\n\n

Sound Absorption Class A<\/h5>\n\n\n\n

A Class A sound absorber fully absorbs when installed above a metal cassette with at least 20% open area. The absorber can be placed directly in the cassette or below the structural floor.<\/p>\n<\/div>\n\n\n\n

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Classification of absorbers according to EN-ISO 11654 is described in the Swedish standard SS 25268.<\/p>\n\n\n\n

EN-ISO 11654 classifies sound absorbers into five different classes: A, B, C, D, and E. Class A absorbs the most sound, while Class E absorbs the least.<\/p>\n\n\n\n

The measured absorption curve obtained in a reverberation room according to ISO 354 is assigned an absorption class based on the curve as described below.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

<\/div>\n\n\n\n
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Open Area<\/th>Hole pattern<\/th>Construction Height<\/th>Sound Absorption<\/th>Sound absorption class<\/th>Measurement Report<\/th><\/tr>
%<\/th>mm<\/th>mm<\/th>aw<\/th><\/th>mm<\/th><\/tr><\/thead>
<\/td><\/td>40 = dikt an<\/td>0,9<\/td>Class A<\/td>200812-P-001<\/a><\/td><\/tr>
20<\/td>\u00d85 x \u25a110<\/td>200<\/td>1<\/td>Class A<\/td>200812-P-002<\/a><\/td><\/tr>
<\/td><\/td>400<\/td>1<\/td>Class A<\/td>200812-P-003<\/a><\/td><\/tr>
<\/td><\/tr>
<\/td><\/td>40 = dikt an<\/td>0,9<\/td>Class A<\/td>200812-P-007<\/a><\/td><\/tr>
21<\/td>\u00d81.8 x \u25a13.5<\/td>200<\/td>1<\/td>Class A<\/td>200812-P-008<\/a><\/td><\/tr>
<\/td><\/td>400<\/td>1<\/td>Class A<\/td>200812-P-009<\/a><\/td><\/tr>
<\/td><\/tr>
<\/td><\/td>40 = dikt an<\/td>0,9<\/td>Class A<\/td>200812-S-004<\/a><\/td><\/tr>
44<\/td>*12×6<\/td>200<\/td>1<\/td>Class A<\/td>200812-S-005<\/a><\/td><\/tr>
<\/td><\/td>400<\/td>1<\/td>Class A<\/td>200812-S-006<\/a><\/td><\/tr><\/tbody><\/table><\/div><\/div>\n<\/div><\/div>\n\n\n\n
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See all suspended ceilings<\/a><\/h4>\n<\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-350","page","type-page","status-publish","hentry"],"yoast_head":"\nAcoustics - Itaab en<\/title>\n<meta name=\"description\" content=\"Metal is a hard material and, depending on its design, can have various effects on sound, but it does not inherently possess any sound-absorbing properties\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itaab.com\/en\/acoustics\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Acoustics - Itaab en\" \/>\n<meta property=\"og:description\" content=\"Metal is a hard material and, depending on its design, can have various effects on sound, but it does not inherently possess any sound-absorbing properties\" \/>\n<meta property=\"og:url\" content=\"https:\/\/itaab.com\/en\/acoustics\/\" \/>\n<meta property=\"og:site_name\" content=\"Itaab en\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-04T08:28:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.itaab.com\/wp-content\/uploads\/sites\/3\/2020\/11\/Absorptionsklasser_01-445x256.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/itaab.com\\\/en\\\/acoustics\\\/\",\"url\":\"https:\\\/\\\/itaab.com\\\/en\\\/acoustics\\\/\",\"name\":\"Acoustics - 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