{"id":2296,"date":"2022-05-31T14:07:54","date_gmt":"2022-05-31T14:07:54","guid":{"rendered":"https:\/\/p69.com.vn\/?p=2296"},"modified":"2022-06-03T08:33:05","modified_gmt":"2022-06-03T08:33:05","slug":"tieu-am-ong-gio","status":"publish","type":"post","link":"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/","title":{"rendered":"What is Duct Silencer? Solutions and uses of the Duct Silencer system"},"content":{"rendered":"<p>Ventilation fans are widely used not only in industrial parks but also in the civil field. However, ventilation fans often cause very loud noise, so to ensure a sound environment and avoid noise pollution, soundproof ducts are the best choice.<\/p>\n<p>So what is duct sound absorption? How is it structured? What types of duct sound absorbers are popular on the market? Why should we use sound absorbers in ducts? To answer these questions, let&#8217;s find out with\u00a0<a href=\"https:\/\/p69.com.vn\/en\/\" target=\"_blank\" rel=\"noopener\"><strong>P69 Mechanical Factory<\/strong><\/a> !<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_45 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" area-label=\"ez-toc-toggle-icon-1\"><label for=\"item-69e904db55655\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input  type=\"checkbox\" id=\"item-69e904db55655\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#What_is_Duct_Silencer\" title=\"What is Duct Silencer?\">What is Duct Silencer?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Basic_structure_of_Duct_Silencer\" title=\"Basic structure of Duct Silencer\">Basic structure of Duct Silencer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Types_of_popular_duct_silencer_on_the_market\" title=\"Types of popular duct silencer on the market\">Types of popular duct silencer on the market<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#1_Square_Rectanguler_Plenum_Box\" title=\"1. Square, Rectanguler Plenum Box\">1. Square, Rectanguler Plenum Box<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#2_Round_Duct_Silencer\" title=\"2. Round Duct Silencer\">2. Round Duct Silencer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#3_Plate-type_Plenum_box\" title=\"3. Plate-type Plenum box\">3. Plate-type Plenum box<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Why_should_we_use_silencer_in_ducts\" title=\"Why should we use silencer in ducts?\">Why should we use silencer in ducts?<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Easy_to_construct\" title=\"Easy to construct\">Easy to construct<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Effective_noise_cancellation\" title=\"Effective noise cancellation\">Effective noise cancellation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Compact_design\" title=\"Compact design\">Compact design<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Disadvantages_of_Duct_Silencer\" title=\"Disadvantages of Duct Silencer\">Disadvantages of Duct Silencer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#How_to_apply_duct_silencer_to_blower_systems\" title=\"How to apply duct silencer to blower systems?\">How to apply duct silencer to blower systems?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/p69.com.vn\/en\/tieu-am-ong-gio\/#Contact_information_P69_-_M_E_Contractor\" title=\"Contact information P69 \u2013 M&amp;E Contractor\">Contact information P69 \u2013 M&amp;E Contractor<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Duct_Silencer\"><\/span><span id=\"1-Tieu-am-ong-gio-la-gi\">What is Duct Silencer?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Duct Silencer, also known as soundproof box, is actually a device placed in the ventilation fan that has the effect of reducing the noise emitted when the machine is in operation.<\/p>\n<p>Similar to other types of soundproof flexible ducts, the sound absorber is composed of 3 parts: the outermost corrugated iron pipe, the middle is the soundproofing materials, and the innermost layer is the core corrugated iron.<\/p>\n<p>Soundproof materials are used such as glass cloth, mineral cotton, vulcanized rubber\u2026. Depending on the thickness and type of soundproofing material, the level of noise reduction is also different.<\/p>\n<p>Duct soundproof boxes are used a lot in construction projects today. It is installed in the ducts, ventilation fans and used in construction works such as schools, hospitals, high-rise apartments&#8230;<\/p>\n<figure id=\"attachment_2299\" aria-describedby=\"caption-attachment-2299\" style=\"width: 1536px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2299 size-full\" title=\"Ti\u00eau \u00e2m \u1ed1ng gi\u00f3 c\u1ee7a C\u00f4ng ty P69\" src=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1.jpg\" alt=\"Ti\u00eau \u00e2m \u1ed1ng gi\u00f3 c\u1ee7a C\u00f4ng ty P69\" width=\"1536\" height=\"1536\" srcset=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1.jpg 1536w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1-300x300.jpg 300w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1-100x100.jpg 100w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1-600x600.jpg 600w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1-1024x1024.jpg 1024w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1-150x150.jpg 150w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieuam-ogt-fix-5-1536x1536-1-768x768.jpg 768w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><figcaption id=\"caption-attachment-2299\" class=\"wp-caption-text\"><em>Duct Silencer of P69 Mechanical Factory<\/em><\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Basic_structure_of_Duct_Silencer\"><\/span>Basic structure of Duct Silencer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Basically, the soundproof box will be composed of 3 parts. Detail:<\/p>\n<ul>\n<li>The outside is a corrugated iron pipe<\/li>\n<li>Mineral wool layer and glass cloth in the middle<\/li>\n<li>Perforated hole in the innermost<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Types_of_popular_duct_silencer_on_the_market\"><\/span>Types of popular duct silencer on the market<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Based on criteria such as shape and size, the current sound absorption duct is divided into 3 types: rectangular duct soundproof box, circular duct sound absorption box and plate type duct sound absorption box..<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Square_Rectanguler_Plenum_Box\"><\/span><span id=\"1_Hop_tieu_am_ong_gio_hinh_vuong_hinh_chu_nhat\" class=\"ez-toc-section\"><\/span>1. Square, Rectanguler Plenum Box<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Is a soundproof box designed with the old shape before and easy to use. The level of sound reduction of the box increases significantly as the thickness increases, the density of the mineral wool\/glass wool layer increases and the distance between the sound-absorbing panels decreases.<\/p>\n<figure id=\"attachment_2298\" aria-describedby=\"caption-attachment-2298\" style=\"width: 768px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2298 size-full\" title=\"H\u1ed9p ti\u00eau \u00e2m \u1ed1ng gi\u00f3 h\u00ecnh vu\u00f4ng\" src=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/ong-gio-tieu-am-768x540-1.jpg\" alt=\"H\u1ed9p ti\u00eau \u00e2m \u1ed1ng gi\u00f3 h\u00ecnh vu\u00f4ng\" width=\"768\" height=\"540\" srcset=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/ong-gio-tieu-am-768x540-1.jpg 768w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/ong-gio-tieu-am-768x540-1-600x422.jpg 600w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/ong-gio-tieu-am-768x540-1-300x211.jpg 300w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption id=\"caption-attachment-2298\" class=\"wp-caption-text\"><em>Square Plenum box<\/em><\/figcaption><\/figure>\n<p>For rectangular sound-absorbing boxes, when manufacturing, manufacturers often produce sound-absorbing boxes in many sizes and thicknesses of sound-absorbing panels to suit the layout and use purposes of the building.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Round_Duct_Silencer\"><\/span><span id=\"2_Hop_tieu_am_ong_gio_hinh_tron\" class=\"ez-toc-section\"><\/span>2. Round Duct Silencer<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It is a new line of wind-tunnel sound absorbers with good sound absorption, easy to install and operate, and save space. This is a new product line on the market today, so the number of manufacturers of this type is not much.<\/p>\n<figure id=\"attachment_2300\" aria-describedby=\"caption-attachment-2300\" style=\"width: 801px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2300 size-full\" title=\"H\u1ed9p ti\u00eau \u00e2m \u1ed1ng gi\u00f3 h\u00ecnh tr\u00f2n\" src=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieu-am-ong-gio-tron.jpg\" alt=\"H\u1ed9p ti\u00eau \u00e2m \u1ed1ng gi\u00f3 h\u00ecnh tr\u00f2n\" width=\"801\" height=\"801\" srcset=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieu-am-ong-gio-tron.jpg 801w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieu-am-ong-gio-tron-300x300.jpg 300w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieu-am-ong-gio-tron-100x100.jpg 100w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieu-am-ong-gio-tron-600x600.jpg 600w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieu-am-ong-gio-tron-150x150.jpg 150w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/tieu-am-ong-gio-tron-768x768.jpg 768w\" sizes=\"auto, (max-width: 801px) 100vw, 801px\" \/><figcaption id=\"caption-attachment-2300\" class=\"wp-caption-text\"><em>Round Duct Silencer<\/em><\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"3_Plate-type_Plenum_box\"><\/span><span id=\"3_Hop_tieu_am_ong_gio_kieu_tam_ban\" class=\"ez-toc-section\"><\/span>3. Plate-type Plenum box<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>As a sound absorption box with excellent sound absorption ability and for the frequency range of 500\u00f71000Hz, the plate-type ductwork has the greatest sound absorption capacity.<\/p>\n<p>For plate-type sound-absorbing boxes, depending on the sound frequency, design ducts of different sizes. For low-frequency noise sources, large boxes should be selected and vice versa.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_should_we_use_silencer_in_ducts\"><\/span><strong>Why should we use silencer in ducts?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In today&#8217;s modern life, product<strong>\u00a0duct silencer<\/strong> is being used popularly in many different spaces because of the outstanding benefits it brings. If in the past, sound absorption in air ducts was produced in the traditional way by using mineral wool, glass cloth, perforated corrugated iron to absorb sound, now it has been used with vulcanized rubber glued inside. The tube has an extremely convenient cylindrical structure.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Easy_to_construct\"><\/span>Easy to construct<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The advantage of <strong>duct silencer<\/strong> is that it is easy to install, quick to construct, and ensures extremely effective insulation, soundproofing and fireproofing features.<\/p>\n<p>With excellent sound insulation, your space will be effectively limited noise, thereby not only ensuring the production process but also protecting the health of workers.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Effective_noise_cancellation\"><\/span>Effective noise cancellation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Besides the effect of preventing noise from equipment and machinery, it also has the effect of anti-noise by the aerodynamics of the airflow, against the noise of the airflow from the blowers, against the noise transmitted from outside sources. in the room and especially filter dust in the environment of factories, factories, industrial parks, commercial centers &#8230; out and bring clean air inside extremely convenient.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Compact_design\"><\/span>Compact design<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The product has a compact design, does not take up a lot of installation space, has good sound absorption, &#8230; helps to save maximum space.<\/p>\n<p>The products Duct Silencer in the ducts are suitable for many different spaces, providing a quiet space, ensuring production and business activities&#8230; which are extremely necessary for today&#8217;s modern life.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Disadvantages_of_Duct_Silencer\"><\/span>Disadvantages of Duct Silencer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Mineral wool is not really capable of absorbing sound at all frequencies. Use can be very effective, sometimes not effective at all, depending on the wavelength and frequency of emission.<\/p>\n<p>Mineral wool after use will absorb water and lose its insulation effect as well as the ability to simultaneously produce mold and odor.<\/p>\n<p>On the other hand, it is this mineral wool layer that, during use, will absorb water, losing its insulation effect, and at the same time, it will produce mold and bad odors that also adversely affect the health of the user.<\/p>\n<p>Products like these are rubber in nature, so after use, they will decompose by themselves. At the same time, when a fire incident occurs, these products not only catch fire and spread, but also produce a lot of smoke and toxins (because the materials themselves contain CFCs, HCFCs, PVCs, etc.), so special endanger life. Most deaths are caused by smoke inhalation, not fire.<\/p>\n<figure id=\"attachment_2301\" aria-describedby=\"caption-attachment-2301\" style=\"width: 506px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2301 size-full\" title=\"Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a \u1ed1ng ti\u00eau \u00e2m\" src=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/ong-gio-tieu-am.png\" alt=\"Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a \u1ed1ng ti\u00eau \u00e2m\" width=\"506\" height=\"453\" srcset=\"https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/ong-gio-tieu-am.png 506w, https:\/\/p69.com.vn\/wp-content\/uploads\/2022\/05\/ong-gio-tieu-am-300x269.png 300w\" sizes=\"auto, (max-width: 506px) 100vw, 506px\" \/><figcaption id=\"caption-attachment-2301\" class=\"wp-caption-text\"><em>Disadvantages of Duct Silencer<\/em><\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"How_to_apply_duct_silencer_to_blower_systems\"><\/span>How to apply duct silencer to blower systems?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Use a soundproof box to reduce the sound emitted by devices and air flows into the room and to the surrounding areas.<\/p>\n<p>For small devices such as fans, FCUs or AHUs: the devices are sealed with soundproof boxes to absorb the reflected sounds from the device and not let them spread around.<\/p>\n<p>For large equipment such as Chiller machine room AHU, the equipment is placed in closed and soundproofed machine rooms.<\/p>\n<p>For airflow: install duct mufflers in their path. The soundproof boxes are responsible for absorbing the sound propagated by the moving air stream.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Contact_information_P69_-_M_E_Contractor\"><\/span>Contact information P69 \u2013 M&amp;E Contractor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Headquarter:<\/strong> No. 6\/165C Xuan Thuy, Cau Giay District, Hanoi<\/p>\n<p><strong>Website:<\/strong> https:\/\/p69.com.vn\/<\/p>\n<p><strong>Hotline:<\/strong> 02422121212 \u2013 0965937799<\/p>\n<p><strong>Email:<\/strong> kd@cokhip69.com.vn<\/p>\n<p><strong>Facebook:<\/strong>\u00a0<a href=\"https:\/\/www.facebook.com\/p69nhathaucodien\">https:\/\/www.facebook.com\/p69nhathaucodien<\/a><\/p>\n<p><strong>LinkedIn:<\/strong>\u00a0<a href=\"https:\/\/www.linkedin.com\/in\/congtyp69\/\">https:\/\/www.linkedin.com\/in\/congtyp69\/<\/a><\/p>\n<p><strong>Youtube:<\/strong> <a href=\"https:\/\/www.youtube.com\/channel\/UCOUwCnE5iGj8iqe_ZIUM7oA\">https:\/\/www.youtube.com\/channel\/UCOUwCnE5iGj8iqe_ZIUM7oA<\/a><\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;2296&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;5&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (5 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (5 votes)    <\/div>\n    <\/div>","protected":false},"excerpt":{"rendered":"<p>Ventilation fans are widely used not only in industrial parks but also in the civil field. However, ventilation fans often cause very loud noise, so to ensure a sound environment and avoid noise pollution, soundproof ducts are the best choice. So what is duct sound absorption? How is it structured? What types of duct sound [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2300,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-2296","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v17.1.1 (Yoast SEO v20.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ti\u00eau \u00e2m \u1ed1ng gi\u00f3 l\u00e0 g\u00ec? Gi\u1ea3i ph\u00e1p, c\u00f4ng d\u1ee5ng h\u1ec7 th\u1ed1ng ti\u00eau \u00e2m \u1ed1ng gi\u00f3<\/title>\n<meta name=\"description\" content=\"Qu\u1ea1t th\u00f4ng gi\u00f3 th\u01b0\u1eddng g\u00e2y ra ti\u1ebfng \u1ed3n r\u1ea5t l\u1edbn, \u0111\u1ec3 tr\u00e1nh \u00f4 nhi\u1ec5m ti\u1ebfng \u1ed3n, \u1ed1ng gi\u00f3 ti\u00eau \u00e2m ch\u00ednh l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/p69.com.vn\/tieu-am-ong-gio\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[:vi]Ti\u00eau \u00e2m \u1ed1ng gi\u00f3 l\u00e0 g\u00ec? Gi\u1ea3i ph\u00e1p, c\u00f4ng d\u1ee5ng h\u1ec7 th\u1ed1ng ti\u00eau \u00e2m \u1ed1ng gi\u00f3[:en]What is Duct Silencer? 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