{"id":1422,"date":"2012-07-20T14:00:12","date_gmt":"2012-07-20T14:00:12","guid":{"rendered":"https:\/\/www.akustik-forschung.de\/test\/?p=1422"},"modified":"2025-06-25T11:38:11","modified_gmt":"2025-06-25T09:38:11","slug":"schallabsorptionsmessgeraet-acoustiadrienne","status":"publish","type":"post","link":"https:\/\/www.akustikforschung.de\/en\/produkte\/messgerate\/schallabsorptionsmessgeraet-acoustiadrienne\/","title":{"rendered":"Sound absorption meter AcoustiAdrienne"},"content":{"rendered":"<p><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_basismodul_ausleger_01_ed3_ws.png\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-11870\" style=\"margin-top: 0px;\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_basismodul_ausleger_01_ed3_ws.png\" alt=\"Sound absorption meter AcoustiAdrienne for nondestructive measurement of sound absorption coefficient, sound reflection, sound insulation and sound diffraction at noise barriers in situ\" width=\"400\" height=\"418\" srcset=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_basismodul_ausleger_01_ed3_ws.png 765w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_basismodul_ausleger_01_ed3_ws-300x314.png 300w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_basismodul_ausleger_01_ed3_ws-640x669.png 640w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>The sound absorption meter AcoustiAdrienne serves the <strong>nondestructive measurement<\/strong> of the sound absorption, sound reflection, sound insulation and the sound diffraction of a noise barrier at a road or a railway on the basis of the Adrienne method described in DIN EN 1793-4 and DIN EN 16272-4, DIN EN 1793-5 and DIN EN 16272\u20115 as well as DIN EN 1793-6 and DIN EN 16272-6.<\/p>\n<p>By means of an adapter, the sound absorption coefficient of a road surface according to DIN ISO 13472-1 in situ as well as the sound absorption coefficient of a noise barrier according to DIN CEN\/TS 1793\u20115 and DIN CEN\/TS 16272-5 can be determined nondestructively.<\/p>\n<p>On the basis of the measuring results, the sound reflection of noise barriers can be rated according to ZTV Lsw 22 (for non-reverberant situations). Furthermore, the rated sound absorption coefficient according to DIN EN ISO 11654 of a wall absorber or ceiling absorber being installed in a room can be estimated as well.<\/p>\n<p>To <a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2025\/06\/AcoustiAdrienne-Sound-Absorption-Meter-Quick-Manual-Sound-Reflection-Index.pdf\">Quick Manual<\/a> of Sound absorption meter AcoustiAdrienne &#8211; Module Sound Reduction Index in situ.<\/p>\n<p><!--contentpartdivider--><\/p>\n<h4>Fields of Application of sound absorption meter<\/h4>\n<p>The sound absorption meter AcoustiAdrienne supported by the analysis software AcoustiStudio (Module Sound Reflection In situ) serves the nondestructive measurement of<\/p>\n<ul>\n<li><strong>sound reflection<\/strong> (sound reflection index and sound absorption coefficient) <strong>of a noise barrier<\/strong> \/ a sound screen in situ on the basis of the Adrienne method described in DIN EN 1793-5 and DIN EN 16272-5.<\/li>\n<\/ul>\n<p>An extension of the sound absorption meter additionally allows the measurement of<\/p>\n<ul>\n<li>the <strong>transmission loss<\/strong> (sound insulation index) <strong>of a noise barrier<\/strong> \/ a sound screen in situ according to DIN EN 1793-6 and DIN EN 16272-6 (Module Sound Insulation In situ) as well as<\/li>\n<li>the <strong>sound diffraction<\/strong> (sound diffraction index, Miller index) <strong>at a noise barrier<\/strong> with crown elements according to DIN EN 1793-4 and DIN EN 16272-4 (Module Sound Diffraction In situ)<\/li>\n<\/ul>\n<p>on-site. By means of an adapter, also<\/p>\n<ul>\n<li>the <strong>sound absorption coefficient of a road surface<\/strong> in situ according to DIN\u00a0ISO\u00a013472-1 as well as<\/li>\n<li>the <strong>sound absorption<\/strong> (sound reflection index and sound absorption coefficient) <strong>of a noise barrier<\/strong> \/ a sound screen according to DIN CEN\/TS 1793-5 and DIN CEN\/TS 16272-5 (Module Sound Absorption In situ)<\/li>\n<\/ul>\n<p>can be determined in situ. Furthermore, the method is suitable to nondestructively measure<\/p>\n<ul>\n<li>the <strong>sound absorption coefficient of a sound absorber being installed in a room<\/strong> in order to reduce its reverberation time (e.g. wall absorber, ceiling absorber)<\/li>\n<\/ul>\n<p>as well.<\/p>\n<p>In contrast to the operation of the impedance tube <a href=\"https:\/\/www.akustikforschung.de\/en\/produkte\/messgerate\/impedanzrohr-acoustitube\/\">AcoustiTube<sup>\u00ae<\/sup><\/a>, the sound absorption coefficient cannot only be determined for perpendicular sound incidence, but also for statistical sound incidence.<\/p>\n<p>By applying a specific model to consider the effect of sound diffraction at edges, these results can be compared to measurement results gained in the reverberation chamber according to DIN EN ISO 354.<\/p>\n<h4>Principle of sound absorption meter<\/h4>\n<p>In order to determine the acoustic properties of sound absorbers in situ, in each case two measurements have to be carried out, one measurement with specimen and on measurement without specimen (free field).<\/p>\n<p>Exemplarily, from the first measurement of a sound absorption test with specimen an impulse response is calculated that contains a direct component, a reflected component of the specimen as well as further reflected components caused by surrounding obstacles. Latter ones can be excluded by application of a time window (Adrienne window). From the second measurement without specimen (free field) an impulse response is calculated that solely contains a direct component. Finally, the sound absorption coefficient and the sound reflection index of the specimen to be characterized can be determined by subtracting both calculated impulse responses from each other.<\/p>\n<p><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed830_02_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_wandabsorber_vor_Ort_in_situ_prinzip_animation_ws.gif\" rel=\"gallery\"><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10452 size-full\" style=\"margin-top: 0px;\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed830_02_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_wandabsorber_vor_Ort_in_situ_prinzip_animation_ws.gif\" alt=\"Sound absorption meter AcoustiAdrienne for nondestructive measurement of sound absorption coefficient, sound insulation and sound diffraction at noise barriers in situ\" width=\"120\" height=\"200\" \/><\/a><\/p>\n<p id=\"attachment_10452\" class=\"wp-caption-text\">Principle of measurement of sound absorption coefficient of wall absorber by means of sound absorption meter AcoustiAdrienne in situ<\/p>\n<p><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed830_03_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_wandabsorber_vor_Ort_in_situ_prinzip_animation_ws.gif\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-10453 size-full\" style=\"margin-top: 0px;\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed830_03_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_wandabsorber_vor_Ort_in_situ_prinzip_animation_ws.gif\" alt=\"Principle of measurement of sound absorption coefficient of wall absorber by means of sound absorption meter AcoustiAdrienne in situ\" width=\"640\" height=\"480\" \/><\/a><\/p>\n<p><!--contentpartdivider--><\/p>\n<div id=\"attachment_10774\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2020\/08\/aed800_14_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_laermschutzwand_ed2_ws.jpg\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-10774\" class=\"wp-image-10774 size-medium\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2020\/08\/aed800_14_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_laermschutzwand_ed2_ws-300x403.jpg\" alt=\"Sound absorption meter AcoustiAdrienne for nondestructive measurement of sound absorption coefficient, sound insulation and sound diffraction at noise barriers in situ\" width=\"300\" height=\"403\" srcset=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2020\/08\/aed800_14_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_laermschutzwand_ed2_ws-300x403.jpg 300w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2020\/08\/aed800_14_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_laermschutzwand_ed2_ws-363x487.jpg 363w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2020\/08\/aed800_14_schallabsorptionsmessgeraet_messung_schallabsorptionsgrad_laermschutzwand_ed2_ws.jpg 596w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-10774\" class=\"wp-caption-text\">Measurement of sound reflection index and sound absorption coefficient at noise barrier by means of sound absorption meter AcoustiAdrienne in situ<\/p><\/div>\n<p><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_02_messung_ws.png\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-11520 size-medium\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_02_messung_ws-300x234.png\" alt=\"Analysis software &quot;AcoustiStudio - Module Sound Absorption In Situ&quot; for measurement of sound reflexion index and sound absorption coefficient at noise barriers with sound absorption meter AcoustiAdrienne in situ\" width=\"300\" height=\"234\" srcset=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_02_messung_ws-300x234.png 300w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_02_messung_ws-640x499.png 640w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_02_messung_ws-768x599.png 768w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_02_messung_ws.png 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<div id=\"attachment_11521\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_04_schallreflexionsindex_ws.png\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-11521\" class=\"wp-image-11521 size-medium\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_04_schallreflexionsindex_ws-300x234.png\" alt=\"Measuring system AcoustiAdrienne for measurement of sound absorption, sound insulation and sound diffraction at noise barriers in situ\" width=\"300\" height=\"234\" srcset=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_04_schallreflexionsindex_ws-300x234.png 300w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_04_schallreflexionsindex_ws-640x499.png 640w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_04_schallreflexionsindex_ws-768x599.png 768w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustistudio_modul_schallabsorption_in_situ_04_schallreflexionsindex_ws.png 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-11521\" class=\"wp-caption-text\">Analysis software &#8220;AcoustiStudio &#8211; Module Sound Absorption In Situ&#8221; for measurement of sound reflexion index and sound absorption coefficient at noise barriers with sound absorption meter AcoustiAdrienne in situ<\/p><\/div>\n<div id=\"attachment_11524\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustiadrienne_mikrofongitter_ed2_ws.jpg\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-11524\" class=\"wp-image-11524 size-medium\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustiadrienne_mikrofongitter_ed2_ws-300x350.jpg\" alt=\"Sound absorption meter AcoustiAdrienne for nondestructive measurement of sound absorption coefficient, sound insulation and sound diffraction at noise barriers in situ\" width=\"300\" height=\"350\" srcset=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustiadrienne_mikrofongitter_ed2_ws-300x350.jpg 300w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustiadrienne_mikrofongitter_ed2_ws-640x746.jpg 640w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2021\/05\/acoustiadrienne_mikrofongitter_ed2_ws.jpg 686w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-11524\" class=\"wp-caption-text\">Microphone arrangement for measurent of sound reflexion index, sound absorption coeffient and sound insulation at noise barriers in situ<\/p><\/div>\n<div id=\"attachment_10424\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed820_02_schallabsorptionsmessgeraet_messung_schallbeugung_schirmkrone_laermschutzwand_ed_ws.jpg\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-10424\" class=\"wp-image-10424 size-medium\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed820_02_schallabsorptionsmessgeraet_messung_schallbeugung_schirmkrone_laermschutzwand_ed_ws-300x225.jpg\" alt=\"Sound absorption meter AcoustiAdrienne for nondestructive measurement of sound absorption coefficient, sound insulation and sound diffraction at noise barriers in situ\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed820_02_schallabsorptionsmessgeraet_messung_schallbeugung_schirmkrone_laermschutzwand_ed_ws-300x225.jpg 300w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed820_02_schallabsorptionsmessgeraet_messung_schallbeugung_schirmkrone_laermschutzwand_ed_ws-768x576.jpg 768w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed820_02_schallabsorptionsmessgeraet_messung_schallbeugung_schirmkrone_laermschutzwand_ed_ws-640x480.jpg 640w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed820_02_schallabsorptionsmessgeraet_messung_schallbeugung_schirmkrone_laermschutzwand_ed_ws-440x330.jpg 440w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2018\/06\/aed820_02_schallabsorptionsmessgeraet_messung_schallbeugung_schirmkrone_laermschutzwand_ed_ws.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-10424\" class=\"wp-caption-text\">Measurement of sound diffraction (Miller index) at noise barrier with crown element (Miller index difference) in situ<\/p><\/div>\n<div id=\"attachment_11866\" style=\"width: 810px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_messung_schallabsorption_indoor_ed_ws.jpg\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-11866\" class=\"wp-image-11866 size-full\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_messung_schallabsorption_indoor_ed_ws.jpg\" alt=\"Messung von Schallabsorptionsgrad an Wandabsorber im Raum mit Schallabsorptionsmessger\u00e4t AcoustiAdrienne in situ\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_messung_schallabsorption_indoor_ed_ws.jpg 800w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_messung_schallabsorption_indoor_ed_ws-300x225.jpg 300w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_messung_schallabsorption_indoor_ed_ws-640x480.jpg 640w, https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2023\/05\/acoustiadrienne_messung_schallabsorption_indoor_ed_ws-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><p id=\"caption-attachment-11866\" class=\"wp-caption-text\">Messung von Schallabsorptionsgrad an Wandabsorber im Raum mit Schallabsorptionsmessger\u00e4t AcoustiAdrienne in situ<\/p><\/div>\n<p><div id=\"attachment_12124\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2025\/02\/Measuring_Instruments_vs_Analysis_Software_Overview_ws.png\" rel=\"gallery\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-12124\" class=\"wp-image-12124\" src=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2025\/02\/Measuring_Instruments_vs_Analysis_Software_Overview_ws.png\" alt=\"Interaction of measuring systems and analysis software for acoustic design of mufflers and silencers and multi-layer systems of absorbers\" width=\"300\" height=\"215\" \/><\/a><p id=\"caption-attachment-12124\" class=\"wp-caption-text\"><a href=\"https:\/\/www.akustikforschung.de\/wp-content\/uploads\/2025\/02\/Measuring_Instruments_vs_Analysis_Software_Overview.pdf\">Overview<\/a> of measuring systems vs. analysis software for acoustic design of mufflers and silencers and multi-layer systems of absorbers<\/p><\/div><\/p>","protected":false},"excerpt":{"rendered":"<p><\/br>The sound absorption meter AcoustiAdrienne serves the <strong>nondestructive measurement<\/strong> of the sound absorption, sound reflection, sound insulation and the sound diffraction of a noise barrier on the basis of the Adrienne method described in DIN EN 1793-4 and DIN EN 16272-4, DIN EN 1793-5 and DIN EN 16272-5 as well as DIN EN 1793-6 and DIN EN 16272-6.<\/p>\n<p>By means of an adapter, the sound absorption coefficient of a road surface according to DIN ISO 13472-1 in situ as well as the sound absorption coefficient of a noise barrier according to DIN CEN\/TS 1793-5 and DIN CEN\/TS 16272-5 can be determined nondestructively.<\/p>\n<p>On the basis of the measuring results, the sound reflexion of noise barriers can be rated according to ZTV Lsw 22 (for non-reverberant situations). Furthermore, the rated sound absorption coefficient according to DIN EN ISO 11654 of a wall absorber or ceiling absorber being installed in a room can be estimated as well.<\/p>\n","protected":false},"author":1,"featured_media":11870,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27,32,34],"tags":[556,557,580,328,359,578,579,489,488,442,340,365,255,121,279,137,47,327,75,685,86,38,417,281,567,65,566,282,565,271,555,317,684],"class_list":["post-1422","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-know-how","category-messgerate","category-featured-items","tag-adrienne-fenster","tag-adrienne-verfahren","tag-din-cen-ts-16272-5","tag-din-cents-1793-4","tag-din-cents-1793-5","tag-din-en-16272-4","tag-din-en-16272-6","tag-din-en-1793-4","tag-din-en-1793-5","tag-din-en-1793-6","tag-din-iso-13472-1","tag-fahrbahn","tag-fahrbahnoberflache","tag-in-situ","tag-larmschutzwand","tag-messsystem","tag-messung","tag-miller-index","tag-nachhallzeit","tag-nichthallige-situationen","tag-schallabsorber","tag-schallabsorptionsgrad","tag-schallabsorptionsmessgerat","tag-schallbeugung","tag-schallbeugungsindex","tag-schalldammung","tag-schalldaemmungsindex","tag-schallreflexion","tag-schallreflexionsindex","tag-schallschirm","tag-schallschirm-aufsatz","tag-schirmkrone","tag-ztv-lsw-22","has-content-parts","content-parts-5"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Schallabsorptionsmessger\u00e4t Messung Schallabsorption in situ<\/title>\n<meta name=\"description\" content=\"Schallabsorptionsmessger\u00e4t, Messung Schallreflexion Schalld\u00e4mmung, L\u00e4rmschutzwand DIN EN 1793-5, measurement reflection index, noise barrier\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.akustikforschung.de\/produkte\/messgerate\/schallabsorptionsmessgeraet-acoustiadrienne\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Schallabsorptionsmessger\u00e4t Messung Schallabsorption in situ\" \/>\n<meta property=\"og:description\" content=\"Schallabsorptionsmessger\u00e4t, Messung Schallreflexion Schalld\u00e4mmung, 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