{"id":4029,"date":"2023-03-16T06:35:00","date_gmt":"2023-03-16T06:35:00","guid":{"rendered":"https:\/\/owolff.com.linux20.curanetserver.dk\/?p=4029"},"modified":"2024-03-07T12:23:07","modified_gmt":"2024-03-07T10:23:07","slug":"fire-alarms-ul217-ul1480","status":"publish","type":"post","link":"https:\/\/owolff.com\/en\/acoustics-news\/fire-alarms-ul217-ul1480\/","title":{"rendered":"Fire alarms &#8211; UL217 &#038; UL1480"},"content":{"rendered":"<div id='full_slider_1'  class='avia-fullwidth-slider main_color avia-shadow   avia-builder-el-0  el_before_av_one_half  avia-builder-el-first   container_wrap sidebar_right'  ><div  class='avia-slideshow av-lbz3wc7i-446580ecd99cbd07ccf915a0d0027e39 avia-slideshow-no scaling av_slideshow_full avia-slide-slider av-slideshow-ui av-control-default av-slideshow-manual av-loop-once av-loop-manual-endless av-default-height-applied   avia-slideshow-1' 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srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2023\/03\/header-1.jpg 2048w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/03\/header-1-300x59.jpg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/03\/header-1-1030x201.jpg 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/03\/header-1-768x150.jpg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/03\/header-1-1536x300.jpg 1536w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/03\/header-1-1500x293.jpg 1500w, https:\/\/owolff.com\/wp-content\/uploads\/2023\/03\/header-1-705x138.jpg 705w\" sizes=\"(max-width: 2048px) 100vw, 2048px\" \/><\/div><\/li><\/ul><\/div><\/div><div id='after_full_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-4029'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-34fjbq-4b0eb3e73a2c628affc43378bcef9aa4\">\n#top .flex_column.av-34fjbq-4b0eb3e73a2c628affc43378bcef9aa4{\nmargin-top:50px;\nmargin-bottom:0px;\n}\n.flex_column.av-34fjbq-4b0eb3e73a2c628affc43378bcef9aa4{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n.responsive #top #wrap_all .flex_column.av-34fjbq-4b0eb3e73a2c628affc43378bcef9aa4{\nmargin-top:50px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-34fjbq-4b0eb3e73a2c628affc43378bcef9aa4 av_one_half  avia-builder-el-1  el_after_av_slideshow_full  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lbz5eyvc-8b7161d96082ea56c2028b302d72e92c\">\n#top .av_textblock_section.av-lbz5eyvc-8b7161d96082ea56c2028b302d72e92c .avia_textblock{\nfont-size:15px;\ncolor:#adadad;\n}\n<\/style>\n<section  class='av_textblock_section av-lbz5eyvc-8b7161d96082ea56c2028b302d72e92c '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p><span class=\"av-post-metadata-content av-post-metadata-modified\"><span class=\"av-post-metadata-modified-date\">March 15, 2023 \/<\/span><\/span><span class=\"av-post-metadata-content av-post-metadata-separator\"> Acoustics news<\/span><\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfaqogr3-e3492827eb1d0caa846023071b3c4941\">\n#top .av-special-heading.av-lfaqogr3-e3492827eb1d0caa846023071b3c4941{\nmargin:0 0 20px 0;\npadding-bottom:0;\ncolor:#101010;\n}\nbody .av-special-heading.av-lfaqogr3-e3492827eb1d0caa846023071b3c4941 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-lfaqogr3-e3492827eb1d0caa846023071b3c4941 .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-lfaqogr3-e3492827eb1d0caa846023071b3c4941 .av-subheading{\nfont-size:21px;\n}\n<\/style>\n<div  class='av-special-heading av-lfaqogr3-e3492827eb1d0caa846023071b3c4941 av-special-heading-h1 custom-color-heading blockquote modern-quote  avia-builder-el-3  el_after_av_textblock  el_before_av_textblock '><h1 class='av-special-heading-tag '  itemprop=\"headline\"  >Ole Wolff Fire alarms &#8211; UL217 and UL1480<\/h1><div class='av_custom_color av-subheading av-subheading_below'><p>Transducers for fire and safety applications<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lc0kj8mr-6d7ab99035755f570b5058c0475f4632\">\n#top .av_textblock_section.av-lc0kj8mr-6d7ab99035755f570b5058c0475f4632 .avia_textblock{\ncolor:#101010;\n}\n<\/style>\n<section  class='av_textblock_section av-lc0kj8mr-6d7ab99035755f570b5058c0475f4632 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock av_inherit_color'  itemprop=\"text\" ><p>Ole Wolff offers UL217 &#038; UL1480 compliant 520Hz low frequency speakers for smoke detector applications.<\/p>\n<p>Study found that half of all residential fire fatalities occur during the night when people are sleeping. The Fire Protection and Research Foundation conducted research on various populations, including children, young adults, older adults, alcohol-impaired individuals, and those who are hard of hearing, and discovered that low frequency tones at 520 Hz are more effective at waking people up than current fire alarm signals. As a result, regulations now require audible devices in sleeping areas to emit different low frequency alarm signals.<\/p>\n<p>The latest edition of UL217 for residential smoke alarm device made many significant changes to the previous existing standard. One of the main requirements is to prevent false alarm resulting from cooking nuisance.<\/p>\n<p><b>What we offer:<\/b><\/p>\n<ul>\n<li>40mm, 50mm and 57mm diameters<\/li>\n<li>Custom sizes and acoustics available<\/li>\n<li>Low Profile<\/li>\n<li>Water resistant<\/li>\n<li>In accordance with UL217 for 520 Hz low frequency sounders, meets or exceeds 79 dBA, @ rated power at 3.05M with square wave input<\/li>\n<\/ul>\n<p>To learn more about our products, simply click on the &#8220;Request more Info&#8221; button or reach out to your local Ole Wolff representative. Our team is always happy to answer any questions you may have and help you find the best solutions for your needs.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-34fjbq-bc07e15a4e5fb14795820258d83bfba3\">\n#top .flex_column.av-34fjbq-bc07e15a4e5fb14795820258d83bfba3{\nmargin-top:50px;\nmargin-bottom:0px;\n}\n.flex_column.av-34fjbq-bc07e15a4e5fb14795820258d83bfba3{\nborder-radius:3px 3px 3px 3px;\npadding:30px 30px 30px 30px;\nbackground-color:#f9f9f9;\n}\n.responsive #top #wrap_all .flex_column.av-34fjbq-bc07e15a4e5fb14795820258d83bfba3{\nmargin-top:50px;\nmargin-bottom:0px;\n}\n<\/style>\n<div  class='flex_column av-34fjbq-bc07e15a4e5fb14795820258d83bfba3 av_one_half  avia-builder-el-5  el_after_av_one_half  el_before_av_one_half  flex_column_div  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4xu1sd-954baa90398acbcaf1e90d246049461a\">\n#top .av-special-heading.av-4xu1sd-954baa90398acbcaf1e90d246049461a{\nmargin:0 0 20px 0;\npadding-bottom:10px;\ncolor:#101010;\nfont-size:20px;\n}\nbody .av-special-heading.av-4xu1sd-954baa90398acbcaf1e90d246049461a .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-4xu1sd-954baa90398acbcaf1e90d246049461a .av-special-heading-tag{\nfont-size:20px;\n}\n.av-special-heading.av-4xu1sd-954baa90398acbcaf1e90d246049461a .special-heading-inner-border{\nborder-color:#101010;\n}\n.av-special-heading.av-4xu1sd-954baa90398acbcaf1e90d246049461a .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-4xu1sd-954baa90398acbcaf1e90d246049461a .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-4xu1sd-954baa90398acbcaf1e90d246049461a 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svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/acoustics\/speakers\/' class='av-icon-on-hover avia-color-theme-color avia-font-color-theme-color avia-button avia-button-fullwidth av-lbz4w04l-c7432cb843f5d5163160f4c4124130aa avia-icon_select-yes-right-icon avia-color-theme-color'   aria-label=\"Find speakers\"><span class='avia_iconbox_title' >Find speakers<\/span><span class='avia_button_icon avia_button_icon_right avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue875' data-av_iconfont='entypo-fontello' ><\/span><span class='avia_button_background avia-button avia-button-fullwidth avia-color-theme-color-highlight'><\/span><\/a><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfaqmtgi-5548186a99ac0483e3b08a3cfcc9c8fb\">\n#top .hr.hr-invisible.av-lfaqmtgi-5548186a99ac0483e3b08a3cfcc9c8fb{\nheight:75px;\n}\n<\/style>\n<div  class='hr av-lfaqmtgi-5548186a99ac0483e3b08a3cfcc9c8fb 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767px){ \n#top #wrap_all .av-special-heading.av-2fut4t-c41560aef06412716a9237d38b6a21ca .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-2fut4t-c41560aef06412716a9237d38b6a21ca .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-2fut4t-c41560aef06412716a9237d38b6a21ca av-special-heading-h2 custom-color-heading blockquote modern-quote modern-centered  avia-builder-el-9  el_after_av_hr  el_before_av_button_big  avia-builder-el-last  av-inherit-size'><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >For more info, please contact us<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<div  class='avia-button-wrap avia-button-center  avia-builder-el-10  el_after_av_heading  el_before_av_hr '>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lbz4w04l-51a3c82c0c6805872ab251fbca57b886\">\n#top #wrap_all .avia-button.av-lbz4w04l-51a3c82c0c6805872ab251fbca57b886:hover{\ncolor:#ffffff;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-lbz4w04l-51a3c82c0c6805872ab251fbca57b886:hover .avia-svg-icon svg:first-child{\nfill:#ffffff;\nstroke:#ffffff;\n}\n<\/style>\n<a href='https:\/\/owolff.com\/en\/contact\/' class='av-icon-on-hover avia-color-theme-color avia-font-color-theme-color avia-button avia-button-fullwidth av-lbz4w04l-51a3c82c0c6805872ab251fbca57b886 avia-icon_select-yes-right-icon avia-color-theme-color'  target=\"_blank\"  rel=\"noopener noreferrer\"  aria-label=\"Request more info\"><span class='avia_iconbox_title' >Request more info<\/span><span class='avia_button_icon avia_button_icon_right avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue875' data-av_iconfont='entypo-fontello' ><\/span><span class='avia_button_background avia-button avia-button-fullwidth avia-color-theme-color-highlight'><\/span><\/a><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lth2x20h-980ad71cf629883c34272b8dbfbf1528\">\n#top .hr.hr-invisible.av-lth2x20h-980ad71cf629883c34272b8dbfbf1528{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-lth2x20h-980ad71cf629883c34272b8dbfbf1528 hr-invisible  avia-builder-el-11  el_after_av_button_big  el_before_av_sidebar  avia-builder-el-first '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  class='avia-builder-widget-area clearfix  avia-builder-el-12  el_after_av_hr  avia-builder-el-last '><div id=\"newsbox-6\" class=\"widget clearfix avia-widget-container newsbox\"><h3 class=\"widgettitle\">Latest news<\/h3><ul class=\"news-wrap image_size_widget\"><li class=\"news-content post-format-standard\"><div class=\"news-link\"><a class='news-thumb ' title=\"Read: Acoustic design of True Wireless earphones (TWS) using COMSOL Multiphysics\" href=\"https:\/\/owolff.com\/en\/white-papers\/design-tws-earphones-using-comsol\/\"><img decoding=\"async\" loading=\"lazy\" width=\"36\" height=\"36\" src=\"https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-36x36.jpg\" class=\"wp-image-10764 avia-img-lazy-loading-10764 attachment-widget size-widget wp-post-image\" alt=\"\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-36x36.jpg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-300x300.jpg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-1030x1030.jpg 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-80x80.jpg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-768x768.jpg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-1536x1536.jpg 1536w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-2048x2048.jpg 2048w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-12x12.jpg 12w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-180x180.jpg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-1500x1500.jpg 1500w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-705x705.jpg 705w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-120x120.jpg 120w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-450x450.jpg 450w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-24x24.jpg 24w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-48x48.jpg 48w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-600x600.jpg 600w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1-100x100.jpg 100w\" sizes=\"auto, (max-width: 36px) 100vw, 36px\" \/><\/a><div class=\"news-headline\"><a class='news-title' title=\"Read: Acoustic design of True Wireless earphones (TWS) using COMSOL Multiphysics\" href=\"https:\/\/owolff.com\/en\/white-papers\/design-tws-earphones-using-comsol\/\">Acoustic design of True Wireless earphones (TWS) using COMSOL Multiphysics<\/a><span class=\"news-time news-cats\">in: <a title=\"Read more in: Acoustics news\" href=\"https:\/\/owolff.com\/en\/category\/acoustics-news\/\">Acoustics news<\/a>, <a title=\"Read more in: White papers\" href=\"https:\/\/owolff.com\/en\/category\/white-papers\/\">White papers<\/a><\/span><\/div><\/div><\/li><li class=\"news-content post-format-standard\"><div class=\"news-link\"><a class='news-thumb ' title=\"Read: Advanced voice coil and wire technology for micro speakers and drivers\" href=\"https:\/\/owolff.com\/en\/white-papers\/advanced-voice-coil-and-wire-technology-for-micro-speakers-and-drivers\/\"><img decoding=\"async\" loading=\"lazy\" width=\"36\" height=\"36\" src=\"https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-36x36.jpg\" class=\"wp-image-10710 avia-img-lazy-loading-10710 attachment-widget size-widget wp-post-image\" alt=\"\" srcset=\"https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-36x36.jpg 36w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-300x300.jpg 300w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-1030x1030.jpg 1030w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-80x80.jpg 80w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-768x768.jpg 768w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-12x12.jpg 12w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-180x180.jpg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-705x705.jpg 705w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-120x120.jpg 120w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-450x450.jpg 450w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-24x24.jpg 24w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-48x48.jpg 48w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-600x600.jpg 600w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin-100x100.jpg 100w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/04\/linkedin.jpg 1080w\" sizes=\"auto, (max-width: 36px) 100vw, 36px\" \/><\/a><div class=\"news-headline\"><a class='news-title' title=\"Read: Advanced voice coil and wire technology for micro speakers and drivers\" href=\"https:\/\/owolff.com\/en\/white-papers\/advanced-voice-coil-and-wire-technology-for-micro-speakers-and-drivers\/\">Advanced voice coil and wire technology for micro speakers and drivers<\/a><span class=\"news-time news-cats\">in: <a title=\"Read more in: Acoustics news\" href=\"https:\/\/owolff.com\/en\/category\/acoustics-news\/\">Acoustics news<\/a>, <a title=\"Read more in: White papers\" href=\"https:\/\/owolff.com\/en\/category\/white-papers\/\">White papers<\/a><\/span><\/div><\/div><\/li><li class=\"news-content post-format-standard\"><div 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https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-180x180.jpg 180w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-705x705.jpg 705w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-120x120.jpg 120w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-450x450.jpg 450w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-24x24.jpg 24w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-48x48.jpg 48w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-600x600.jpg 600w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin-100x100.jpg 100w, https:\/\/owolff.com\/wp-content\/uploads\/2026\/01\/linkedin.jpg 1080w\" sizes=\"auto, (max-width: 36px) 100vw, 36px\" \/><\/a><div class=\"news-headline\"><a class='news-title' title=\"Read: Smart Glasses audio design using Comsol simulation tool\" href=\"https:\/\/owolff.com\/en\/white-papers\/smart-glasses-audio-design-using-comsol-simulation-tool\/\">Smart 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