{"id":18961,"date":"2017-12-05T14:17:33","date_gmt":"2017-12-05T13:17:33","guid":{"rendered":"http:\/\/lda-audiotech.com\/en\/?page_id=18961"},"modified":"2026-04-08T10:48:23","modified_gmt":"2026-04-08T08:48:23","slug":"pava-systems-for-tunnels","status":"publish","type":"page","link":"https:\/\/lda-audiotech.com\/en\/pava-systems-for-tunnels\/","title":{"rendered":"PA\/VA Systems for Tunnels"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; in_content_menu=&#8221;in_content_menu&#8221; content_menu_icon=&#8221;fa-info&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;center&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; padding_top=&#8221;75&#8243; padding_bottom=&#8221;75&#8243; anchor=&#8221;Introducci\u00f3n&#8221; content_menu_title=&#8221;Introducci\u00f3n&#8221;][vc_column][vc_column_text css=&#8221;&#8221;]<\/p>\n<h1>PUBLIC ADDRESS AND VOICE ALARM SYSTEMS FOR TUNNELS<\/h1>\n<p>[\/vc_column_text][vc_separator type=&#8221;small&#8221; position=&#8221;center&#8221; width_in_percentages=&#8221;yes&#8221; thickness=&#8221;3&#8243; up=&#8221;20&#8243; down=&#8221;20&#8243; transparency=&#8221;1&#8243; width=&#8221;15&#8243;][vc_column_text css=&#8221;&#8221;]At LDA we are experts in <strong>public address and voice evacuation systems for tunnels<\/strong>. That&#8217;s why we can help you create the most competitive solution which best suits your needs.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221;][vc_column][vc_column_text]<\/p>\n<h2 style=\"text-align: center;\">Our references<\/h2>\n<p>[\/vc_column_text][vc_separator type=&#8221;small&#8221; position=&#8221;center&#8221; up=&#8221;7&#8243; down=&#8221;38&#8243;]<div class='portfolio_slider_holder clearfix'><div class='portfolio_slider'  ><ul class='portfolio_slides'><li class='item'><div class='image_holder'><span class='image'><span class='image_pixel_hover'><\/span><a itemprop='url' href='https:\/\/lda-audiotech.com\/en\/portfolio_page\/traffic-tunnels-brazil\/' target='_self'><img decoding=\"async\" width=\"500\" height=\"380\" src=\"https:\/\/lda-audiotech.com\/wp-content\/uploads\/2025\/03\/Brazil-tunnels-LDA-references-01-500x380.jpg\" class=\"attachment-portfolio_slider size-portfolio_slider wp-post-image\" alt=\"Traffic tunnels in Brazil - LDA References\" \/><\/a><\/span><div class='hover_feature_holder'><div class=\"hover_feature_holder_outer\"><div class=\"hover_feature_holder_inner\"><h3 itemprop=\"name\" class=\"portfolio_title entry_title\"><a itemprop=\"url\" href=\"https:\/\/lda-audiotech.com\/en\/portfolio_page\/traffic-tunnels-brazil\/\" target=\"_self\">Traffic tunnels in Brazil<\/a><\/h3><span class=\"separator small\"><\/span><div class=\"project_category\">Tunnels<\/div><a itemprop='image' class='lightbox qbutton white small' title='Traffic tunnels in Brazil' href='https:\/\/lda-audiotech.com\/wp-content\/uploads\/2025\/03\/Brazil-tunnels-LDA-references-01-500x380.jpg' data-rel='prettyPhoto[portfolio_slider]'>zoom<\/a><a itemprop=\"url\" href=\"https:\/\/lda-audiotech.com\/en\/portfolio_page\/traffic-tunnels-brazil\/\" target=\"_self\" class=\"qbutton white small\">view<\/a><\/div><\/div><\/div><\/div><\/li><li class='item'><div class='image_holder'><span class='image'><span class='image_pixel_hover'><\/span><a itemprop='url' href='https:\/\/lda-audiotech.com\/en\/portfolio_page\/faneque-tunnels\/' target='_self'><img decoding=\"async\" width=\"500\" height=\"380\" src=\"https:\/\/lda-audiotech.com\/wp-content\/uploads\/2024\/06\/Faneque-tunnels-LDA-references-01-500x380.jpg\" class=\"attachment-portfolio_slider size-portfolio_slider wp-post-image\" alt=\"Faneque Tunnels - LDA References\" \/><\/a><\/span><div class='hover_feature_holder'><div class=\"hover_feature_holder_outer\"><div class=\"hover_feature_holder_inner\"><h3 itemprop=\"name\" class=\"portfolio_title entry_title\"><a itemprop=\"url\" href=\"https:\/\/lda-audiotech.com\/en\/portfolio_page\/faneque-tunnels\/\" target=\"_self\">Faneque Tunnels<\/a><\/h3><span class=\"separator small\"><\/span><div class=\"project_category\">Tunnels<\/div><a itemprop='image' class='lightbox qbutton white small' title='Faneque Tunnels' href='https:\/\/lda-audiotech.com\/wp-content\/uploads\/2024\/06\/Faneque-tunnels-LDA-references-01-500x380.jpg' data-rel='prettyPhoto[portfolio_slider]'>zoom<\/a><a itemprop=\"url\" href=\"https:\/\/lda-audiotech.com\/en\/portfolio_page\/faneque-tunnels\/\" target=\"_self\" class=\"qbutton white small\">view<\/a><\/div><\/div><\/div><\/div><\/li><li class='item'><div class='image_holder'><span class='image'><span class='image_pixel_hover'><\/span><a itemprop='url' href='https:\/\/lda-audiotech.com\/en\/portfolio_page\/l-olleria-tunnel\/' target='_self'><img decoding=\"async\" width=\"500\" height=\"380\" src=\"https:\/\/lda-audiotech.com\/wp-content\/uploads\/2018\/04\/tunnel_l_olleria_lda_audiotech-500x380.jpg\" class=\"attachment-portfolio_slider size-portfolio_slider wp-post-image\" alt=\"LDA Audio Tech tunnels pa\/va\" \/><\/a><\/span><div class='hover_feature_holder'><div class=\"hover_feature_holder_outer\"><div class=\"hover_feature_holder_inner\"><h3 itemprop=\"name\" class=\"portfolio_title entry_title\"><a itemprop=\"url\" href=\"https:\/\/lda-audiotech.com\/en\/portfolio_page\/l-olleria-tunnel\/\" target=\"_self\">L&#8217;Olleria tunnel<\/a><\/h3><span class=\"separator small\"><\/span><div class=\"project_category\">Tunnels<\/div><a itemprop='image' class='lightbox qbutton white small' title='L&#8217;Olleria tunnel' href='https:\/\/lda-audiotech.com\/wp-content\/uploads\/2018\/04\/tunnel_l_olleria_lda_audiotech-500x380.jpg' data-rel='prettyPhoto[portfolio_slider]'>zoom<\/a><a itemprop=\"url\" href=\"https:\/\/lda-audiotech.com\/en\/portfolio_page\/l-olleria-tunnel\/\" target=\"_self\" class=\"qbutton white small\">view<\/a><\/div><\/div><\/div><\/div><\/li><\/ul><\/div><\/div>[vc_row_inner row_type=&#8221;row&#8221; type=&#8221;full_width&#8221; text_align=&#8221;left&#8221; css_animation=&#8221;&#8221;][vc_column_inner][vc_empty_space][vc_column_text]<\/p>\n<p style=\"text-align: center;\"><a class=\"qbutton large center\" href=\"https:\/\/lda-audiotech.com\/descargas\/references\/lda_audio_tech-references_en.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Download complete list of references<\/a><\/p>\n<p>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221;][vc_column][vc_empty_space height=&#8221;20px&#8221;][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; background_color=&#8221;#f0163a&#8221;][vc_column][vc_empty_space height=&#8221;80px&#8221;][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; in_content_menu=&#8221;in_content_menu&#8221; content_menu_icon=&#8221;fa-th-large&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; padding_top=&#8221;75&#8243; padding_bottom=&#8221;75&#8243; anchor=&#8221;caracteristicas&#8221; content_menu_title=&#8221;Caracter\u00edsticas&#8221;][vc_column][vc_column_text]<\/p>\n<h3>Tricky environments with clear acoustics<\/h3>\n<p>[\/vc_column_text][vc_separator type=&#8221;small&#8221; position=&#8221;left&#8221; width_in_percentages=&#8221;yes&#8221; thickness=&#8221;3&#8243; up=&#8221;20&#8243; down=&#8221;20&#8243; transparency=&#8221;1&#8243; width=&#8221;15&#8243;][vc_column_text]<\/p>\n<p>Public address and voice alarm systems for tunnels must compensate for complex situations of <strong>reverberation and ambient noise<\/strong> to ensure a clear understanding of the messages. Intelligent technologies based on filters and sound modulation help to compensate for these circumstances.<\/p>\n<p>[\/vc_column_text][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]<strong>People tend to act faster when they hear a human voice<\/strong> telling them what to do or how to proceed, especially in case of emergency.[\/vc_column_text][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]LDA Audio Tech&#8217;s public address and voice alarm systems <strong>certified to EN 54 and EN 60849<\/strong> provide intuitive user management and are easily integrated with existing third-party technologies at tunnels.[\/vc_column_text][vc_empty_space height=&#8221;16px&#8221;][vc_column_text]LDA Audio Tech offers:<\/p>\n<ul>\n<li><strong>Distributed<\/strong> system.<\/li>\n<li>High <strong>intelligibility and directivity<\/strong>.<\/li>\n<li>Integration with <strong>SCADA<\/strong> (Modbus or Ethernet).<\/li>\n<li><strong>SNMP<\/strong> supervision.<\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; background_color=&#8221;#f0163a&#8221;][vc_column]<div class=\"call_to_action normal\" style=\"\"><div class=\"container_inner\"><div class=\"two_columns_75_25 clearfix\"><div class=\"text_wrapper column1\"><div class=\"call_to_action_text \" style=\"\">Contact us and we&#8217;ll help you design the best PA\/VA solution for your tunnel project.<\/div><\/div><div class=\"button_wrapper column2\"><a itemprop=\"url\" href=\"\/en\/contact\/\" class=\"qbutton white \" target=\"\" style=\"\" data-hover-background-color=#ffffff data-hover-color=#000000>Contact us<\/a><\/div><\/div><\/div><\/div>[\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;center&#8221; video=&#8221;show_video&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; background_image=&#8221;15539&#8243; padding_top=&#8221;100&#8243; padding_bottom=&#8221;100&#8243;][vc_column]<div class='q_icon_with_title very_large circle center '><div class=\"icon_holder \" style=\"margin: 0 0 28px 0; \"><a href=\"\/en\/2017\/01\/26\/en-54-voice-alarm-system\/\" target=\"_blank\" class=\"q_icon_link\"><span data-icon-type=\"circle\" class=\"qode_iwt_icon_holder fa-stack fa-5x  \"><i class=\"qode_icon_font_awesome fa fa-play-circle qode_iwt_icon_element\"><\/i><\/span><\/a><\/div><div class=\"icon_text_holder\" style=\"\"><div class=\"icon_text_inner\" style=\"\"><h3 class=\"icon_title\" style=\"\"><\/h3><p style='color: #ffffff'><\/p><a itemprop='url' class='icon_with_title_link' href='\/en\/2017\/01\/26\/en-54-voice-alarm-system\/' target='_blank' style='color: #3f3f3f;'>Read More<\/a><\/div><\/div><\/div>[\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;full_width&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;center&#8221; video=&#8221;show_video&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; anchor=&#8221;video&#8221; background_image=&#8221;15539&#8243; padding_top=&#8221;100&#8243; padding_bottom=&#8221;100&#8243; el_class=&#8221;disable&#8221;][vc_column][vc_column_text]<\/p>\n<div class=\"q_icon_with_title very_large circle center\"><\/div>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row css_animation=&#8221;&#8221; row_type=&#8221;row&#8221; use_row_as_full_screen_section=&#8221;no&#8221; type=&#8221;grid&#8221; in_content_menu=&#8221;in_content_menu&#8221; content_menu_icon=&#8221;fa-star-o&#8221; angled_section=&#8221;no&#8221; text_align=&#8221;left&#8221; background_image_as_pattern=&#8221;without_pattern&#8221; border_color=&#8221;#eaeaea&#8221; padding_top=&#8221;55&#8243; padding_bottom=&#8221;20&#8243; content_menu_title=&#8221;Casos de \u00e9xito&#8221; anchor=&#8221;clients&#8221;][vc_column offset=&#8221;vc_hidden-lg vc_hidden-md vc_hidden-sm vc_hidden-xs&#8221;][qode_clients columns=&#8221;four_columns&#8221; hover_effect=&#8221;default&#8221; disable_separators=&#8221;&#8221;][qode_client link_target=&#8221;_blank&#8221; border_bottom=&#8221;yes&#8221; image=&#8221;15526&#8243; link=&#8221;https:\/\/www.metrobilbao.eus\/&#8221;][qode_client link_target=&#8221;_blank&#8221; border_bottom=&#8221;yes&#8221; image=&#8221;15529&#8243; link=&#8221;http:\/\/www.metro-sevilla.es\/es&#8221;][qode_client link_target=&#8221;_blank&#8221; border_bottom=&#8221;yes&#8221; image=&#8221;15527&#8243; link=&#8221;http:\/\/www.metrodemalaga.info\/&#8221;][qode_client link_target=&#8221;_blank&#8221; border_bottom=&#8221;yes&#8221; image=&#8221;15528&#8243; link=&#8221;https:\/\/www.metrorio.com.br\/&#8221;][\/qode_clients][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p> Tunnels worldwide choose LDA Audio Tech for their public address and voice evacuation installations certified to EN 54 standard <\/p>\n","protected":false},"author":46,"featured_media":18648,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"full_width.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-18961","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PA\/VA Systems for Tunnels - LDA Audio Tech<\/title>\n<meta name=\"description\" content=\"We are experts in public address and voice alarm systems for tunnels. We create cost effective solutions for your projects\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lda-audiotech.com\/en\/pava-systems-for-tunnels\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PA\/VA Systems for Tunnels - LDA Audio Tech\" \/>\n<meta property=\"og:description\" content=\"We are experts in public address and voice alarm systems for tunnels. 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