{"id":9246,"date":"2026-10-05T06:43:13","date_gmt":"2026-10-05T06:43:13","guid":{"rendered":"https:\/\/bhergonomic.com\/?p=9246"},"modified":"2026-10-05T06:43:17","modified_gmt":"2026-10-05T06:43:17","slug":"iso-23351-1-explained","status":"publish","type":"post","link":"https:\/\/bhergonomic.com\/nl\/iso-23351-1-explained\/","title":{"rendered":"Hoe geluiddicht is Elite-S? ISO 23351-1 en 33 dB toegelicht"},"content":{"rendered":"<p class=\"wp-block-paragraph\">U kunt de geluidsisolatie van een telefooncel beoordelen voordat u deze in het echt ziet. Een laboratoriumrapport laat zien hoe de complete cel presteert, en dankzij een gangbare testnorm kunt u die prestaties tussen merken vergelijken.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Onze Elite-S behaalde <strong>ISO 23351-1-prestaties van klasse A met 33 dB spraakniveauvermindering in tests door Intertek<\/strong>. Een hogere classificatie voor spraakniveauvermindering betekent dat er minder spraakgeluid uit de cel ontsnapt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Elite-S houdt meer spraakgeluid binnen.<\/strong> Vergeleken met een cel met een classificatie van 30 dB (ook klasse A) betekent de <strong>classificatie van 33 dB spraakniveauvermindering dat ongeveer 50% minder spraakgeluidsenergie ontsnapt<\/strong> onder dezelfde ISO-testomstandigheden.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Inzicht in dat verschil maakt prijsvergelijkingen ook eerlijker. Stel eerst de akoestische prestaties vast en vergelijk vervolgens wat elke prijs omvat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Laatst bijgewerkt: 5 oktober 2026 | Auteur: Richard | Geschatte leestijd: 6 minuten<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-1024x576.webp\" alt=\"ISO 23351-1 Class A Pod\" class=\"wp-image-9248\" srcset=\"https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-1024x576.webp 1024w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-300x169.webp 300w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-768x432.webp 768w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-1536x864.webp 1536w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-18x10.webp 18w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-600x338.webp 600w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Wat meet ISO 23351-1?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Stel u voor dat iemand in een cel belt met de deur gesloten. U staat buiten. De vraag is hoeveel de behuizing het spraakgeluid vermindert dat naar de omliggende ruimte ontsnapt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.iso.org\/standard\/75299.html\" rel=\"noopener\">ISO 23351-1<\/a> biedt een laboratoriummethode voor het meten van spraakniveauvermindering door meubelcombinaties en behuizingen. Voor een telefooncel kunnen kopers hiermee de complete behuizing beoordelen, in plaats van af te gaan op een geluidsclassificatie voor \u00e9\u00e9n wandpaneel of een stuk glas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Het resultaat wordt genoemd <strong>spraakniveauverlaging<\/strong>. Een hogere waarde betekent een grotere vermindering volgens deze maatstaf. Omdat verschillende fabrikanten dezelfde methode kunnen gebruiken, hebt u een gemeenschappelijke basis om hun resultaten te vergelijken.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De waarde van 33 dB beschrijft hoeveel de behuizing het spraakgeluid vermindert dat naar de omliggende ruimte ontsnapt. Het is een classificatie voor vermindering, en niet het geluidsniveau dat in de cel overblijft of een afzonderlijke meting van geluid van buiten dat de cel binnendringt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Voor een nuttige vergelijking zoekt u naar <strong>ISO 23351-1-spraakniveauvermindering voor de complete cel<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Waarom 33 dB een betekenisvolle stap boven 30 dB is<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Decibels gebruiken een logaritmische schaal. Een verbetering van de classificatie voor spraakniveauvermindering van een cel van 30 naar 33 dB komt onder dezelfde testomstandigheden overeen met een aanvullende vermindering van ongeveer 50% van het ontsnappende spraakgeluidsvermogen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De <a href=\"https:\/\/www.ccohs.ca\/oshanswers\/phys_agents\/noise_basic.html\" rel=\"noopener\">Het Canadian Centre for Occupational Health and Safety legt deze logaritmische relatie uit<\/a>. Om drie boothclassificaties te vergelijken, begint u met een booth met een spraakreductie van 28 dB. Stel het ontsnappende spraakgeluidsvermogen van die booth in op 100 relatieve eenheden:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>ISO-classificatie voor spraakreductie van de booth<\/th><th>Relatief overgedragen spraakgeluidsvermogen \u2014 lager is beter<\/th><\/tr><\/thead><tbody><tr><td>Booth met een classificatie van 28 dB (referentie)<\/td><td>100<\/td><\/tr><tr><td>Booth met een classificatie van 30 dB<\/td><td>Ongeveer 63<\/td><\/tr><tr><td><strong>Elite-S: 33 dB<\/strong><\/td><td><strong>Ongeveer 32<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Alle drie de rijen gebruiken dezelfde referentiespraakbron en gewogen geluidsvermogensmaat. Het door de booth met een classificatie van 28 dB overgedragen spraakgeluidsvermogen vormt de gezamenlijke basislijn van 100.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In deze vergelijking, <strong>ontsnapt er ongeveer 50% minder spraakgeluidsvermogen uit Elite-S dan uit de booth met een classificatie van 30 dB, en ongeveer 68% minder dan uit de booth met een classificatie van 28 dB<\/strong>. Minder ontsnappend spraakgeluidsvermogen betekent volgens deze maatstaf een sterkere spraakisolatie.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Een vermindering van het geluidsvermogen met 50% betekent niet een vermindering van de waargenomen luidheid met 50%.<\/strong> Uw luisterervaring hangt ook af van het omgevingsgeluid en uw positie. Het verschil van 3 dB zorgt bij dezelfde testmethode voor een duidelijke, meetbare verbetering van de spraakisolatie.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wat het Klasse A-resultaat van Elite-S u vertelt<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Onze <a href=\"https:\/\/bhergonomic.com\/nl\/product\/soundproof-phone-booth-elite-s\/\">Elite-S-telefoonbooth<\/a> combineert <strong>ISO 23351-1 Klasse A prestaties<\/strong> met <strong>33 dB spraakniveau reductie<\/strong>. Lees deze samen: de klasse geeft de prestatiecategorie aan, terwijl het getal de gemeten reductie binnen die categorie weergeeft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Twee producten kunnen dezelfde klasse hebben zonder identieke resultaten te behalen. Als u kiest op basis van akoestische prestaties, vergelijk dan zowel de werkelijke waarden voor spraakreductie als het klasselabel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We can provide the Elite-S Intertek report for your comparison. Match it with the model and configuration on your quotation, and use the same approach when reviewing another supplier&#8217;s booth.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Who is Intertek, and why does the laboratory matter?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Intertek is an international testing, inspection, and certification company with <a href=\"https:\/\/www.intertek.com\/about\/\" rel=\"noopener\">more than 140 years of history and a network spanning 100 countries<\/a>. Its services include <a href=\"https:\/\/www.intertek.com\/building\/acoustical\/\" rel=\"noopener\">acoustical testing and consulting<\/a>, giving buyers access to measured product performance from an established third party.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Intertek tested our Elite-S under ISO 23351-1 and measured 33 dB speech level reduction.<\/strong> The standard supplies the common method; the Intertek report documents our booth&#8217;s result. You can use that result to compare Elite-S with other booths tested to the same standard before visiting a showroom.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"783\" src=\"https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A-1024x783.png\" alt=\"ISO 23351-1 Klasse A\" class=\"wp-image-9250\" srcset=\"https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A-1024x783.png 1024w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A-300x230.png 300w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A-768x588.png 768w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A-1536x1175.png 1536w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A-16x12.png 16w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A-600x459.png 600w, https:\/\/bhergonomic.com\/wp-content\/uploads\/2026\/10\/ISO-23351-1-Class-A.png 1566w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Compare acoustic performance before comparing prices<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A booth rated for 28 dB of ISO speech reduction and our Elite-S rated at 33 dB offer different acoustic performance. Treating them as equivalent because both are enclosed phone booths overlooks an extra 5 dB of speech reduction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Under the standardized comparison above, the booth rated at 28 dB transmits approximately 3.16 times as much speech sound power as Elite-S, rated at 33 dB. If you want Elite-S&#8217;s level of speech isolation, a cheaper 28 dB-rated booth represents a lower-performance option, not an equivalent product at a better price.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For a fair price comparison, shortlist booths with the same or similar ISO speech level reduction, then compare their configurations and delivered costs.<\/strong> Look at the numerical results, not just a shared class or the word \u201csoundproof.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This puts the price difference in context: you can see what acoustic performance your budget buys.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why a higher price does not always mean better soundproofing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The sales route also affects what you pay. A purchase through importers, distributors, and local dealers can include margins and services at several stages. A higher retail price alone cannot tell you whether the enclosure reduces speech more effectively.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At B&amp;H, we sell directly from our factory to you, without an intermediary dealer. You get Elite-S&#8217;s independently tested 33 dB speech reduction without the additional dealer markup. That combination of measured acoustic performance and direct pricing is central to the value we offer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Our explanation of <a href=\"https:\/\/bhergonomic.com\/nl\/goedkope-kantoorpod\/\">how factory-direct pricing can reduce office pod costs<\/a> covers the channel differences in more detail.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Save on installation with modular self-assembly<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">We designed Elite-S with a <strong>modular structure to make it easier for you to assemble the booth yourself and save the cost of hiring an installer<\/strong>. Follow the assembly instructions and arrange the people and equipment needed for the job.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We supply our booths on a <strong>DDP (Delivered Duty Paid)<\/strong> basis. Installation is separate: we do not provide installation services or installation quotations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you prefer professional installation, we can help you find a third-party installation company, which provides its own quotation. When comparing a dealer&#8217;s installed package with our DDP price, add the third-party installation cost if you plan to use that service.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Can a nearby showroom help you decide?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Visiting a nearby booth supplier can help you understand the space, door, ventilation, and experience of speaking inside an enclosure. To explore speech escaping from the booth, have someone speak inside with the door closed while you listen outside.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Then ask: <strong>\u201cWhat is the ISO 23351-1 speech level reduction for this exact model?\u201d<\/strong> Get the report so you can compare its result with Elite-S&#8217;s 33 dB.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the comparable ISO result is below 33 dB, that booth achieved less speech reduction than Elite-S in the standardized test. A nearby visit gives you a useful feel for using a booth; the reports give you the numerical comparison across brands, even when the showrooms have different background sound levels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Elite-S&#8217;s Intertek report gives you a firm basis for judging its speech isolation before seeing the booth in person. From there, focus on the design you like, the space you have, and the comfort you need. Explore our <a href=\"https:\/\/bhergonomic.com\/nl\/product-category\/office-phone-booth\/\">one-person office phone booths<\/a> with the acoustic result and DDP price side by side, so you can choose with a clear understanding of both performance and value.<\/p>","protected":false},"excerpt":{"rendered":"<p>You can assess a phone booth&#8217;s sound isolation before you see it in person. A laboratory report shows how the complete booth performs, and a common test standard lets you compare that performance across brands. Our Elite-S achieved ISO 23351-1 Class A performance with 33 dB speech level reduction in testing by Intertek. A higher [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9248,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[75],"tags":[51],"class_list":["post-9246","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-office-phone-booth-resources","tag-office-phone-booth"],"_links":{"self":[{"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/posts\/9246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/comments?post=9246"}],"version-history":[{"count":5,"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/posts\/9246\/revisions"}],"predecessor-version":[{"id":9253,"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/posts\/9246\/revisions\/9253"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/media\/9248"}],"wp:attachment":[{"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/media?parent=9246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/categories?post=9246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bhergonomic.com\/nl\/wp-json\/wp\/v2\/tags?post=9246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}