ISO 3382-2:2015

Room Acoustics Reverberation Time Measurement

This test method specifies procedures for measuring reverberation time and other room acoustic parameters in ordinary rooms such as offices, classrooms, lecture halls, and residential spaces. Reverberation time (T30 or T20) is a fundamental acoustic property that affects speech intelligibility, sound quality, and acoustic comfort. It is essential for designing spaces with appropriate acoustic characteristics, verifying construction specifications, and ensuring compliance with building standards. Architects, acousticians, and building professionals rely on these measurements to evaluate and optimize room acoustic performance. ISO 17025 accreditation guarantees accurate measurements following standardized methodology.

What it measures

  • Reverberation time (T30, T20, EDT)
  • Frequency-dependent acoustic absorption
  • Early decay time and room acoustic parameters
  • Clarity index (C50) and definition (D50)
  • Speech transmission index (STI) indicators
🇩🇪 DIN EN ISO 3382-1 🇬🇧 BS EN ISO 3382-1 🇫🇷 NF EN ISO 3382-1 🇮🇹 UNI EN ISO 3382-1 🇪🇸 UNE EN ISO 3382-1 🇳🇱 NEN EN ISO 3382-1 🇩🇪 DIN EN 60268-16 🇬🇧 BS EN 60268-16 🇫🇷 NF EN 60268-16 🇮🇹 UNI EN 60268-16 🇪🇸 UNE EN 60268-16 🇳🇱 NEN EN 60268-16
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Kovia

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UKAS 9942 Royal William Yard, GB
Appendix 5 of HSG 227 (2004)) HSG 227 (2004) HSG 264 (2012) and Appendix 3 of
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Institut für Laboratoriums- und Transfusionsmedizin Herz- und Diabeteszentrum NRW

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DAkkS D-ML-13173-01-00 Bad Oeynhausen, DE
Thrombozytenfunktion Amiodaron/Desethylamiodaron Cotinin Cyclosporin A Everolimus + 3 more
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Kreiskrankenhaus Bergstraße GmbH - eine Einrichtung des Universitätsklinikums Heidelberg Zentrallaboratorium

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Albumin Alkohol ALP Anti-Faktor Xa (Fragmin) AT3 + 3 more
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Kurz und Fischer GmbH. Beratende Ingenieure

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DAkkS D-PL-19181-01-00 Winnenden, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 13487 DIN 45635-46 + 2 more
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Kögel Werkstoff- und Materialprüfsysteme

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DAkkS D-K-15009-01-01 Leipzig, DE
Eindringkörper für 75° Sound system equipment — speech transmis Länge der Schnittlinien * Vergrößerungsnormale Abflachung bis 300 + 3 more
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Körber Technologies Instruments GmbH - Physikalisches Messlabor

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DAkkS D-K-15082-01-00 Hamburg, DE
Durchfluss von Gasen 17 mL/s transferstandards Strömungswiderstand 5 mL/min 15,0 mL/min Laminar Flow Elemente 17 mL/min + 3 more
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Kötter Consulting Engineers

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DAkkS D-PL-22893-01-00 Rheine, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61400-11 ISO 9613-2
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L & W Gesellschaft für Fertigungsmeßtechnik und Qualitätssicherung

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DAkkS D-K-17059-02-01 Dresden, DE
Messschieber für Außen-, 0 mm Innen- und Tiefenmaße > 300 mm Tiefenmessschieber 0 mm Höhenmessschieber 0 mm + 3 more
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L3A LAB

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COFRAC 1-0978 Malakoff, FR
NF X 43-050 NF X 43-269 - Annexe K NF X43-050 (parties utiles de
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LAB (UK)

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UKAS 0671 Basildon, GB
(HSG 248) – 2021 (PCM) based on HSG 248 MAAM 05 based on HSG 248 (HSG 264, 2012)
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LAB-EXPERT

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COFRAC 1-6752 Ivry Sur Seine, FR
NF X43-050 (parties utiles de la NF X 43-050 NF ISO 22262-1 (parties utiles
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LABACUSTIC

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ENAC LE1438 Vall d Uixó, ES
UNE-EN ISO 140-5 UNE-EN ISO 16283-3 UNE-EN ISO 16283-2 UNE-EN ISO 140-7 UNE-EN ISO 16283-1 + 1 more
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LABAQUA, S.A. (Unipersonal)

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ENAC LE285 Alacant, ES
UNE-EN ISO 27888 SM 2540 UNE-EN ISO 8467 UNE-EN ISO 7027-1 UNE-EN ISO 10523 + 3 more
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LABOCEA - Site de Brest

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COFRAC 1-7014 Plouzane, FR
DIN EN 13346 CEN / TS 14235 NF T 90-412 DIN EN ISO 7899-1 DIN EN 12880 + 3 more
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LABOCEA - Site de Ploufragan

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COFRAC 1-7015 Ploufragan, FR
NF U47-210 NF U47-036-1 NF U47-108 NF U47-100 NF U47-107 + 3 more
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LABOCEA - Site de Quimper

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COFRAC 1-1828 Quimper Cedex, FR
DIN EN ISO 21528-1 DIN EN ISO 21528-2 DIN EN ISO 10304-1 DIN EN ISO 6888-2 NF V08-054 + 3 more
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LABOCOR ANALÍTICA, S.L. (Unipersonal)

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ENAC LE1912 Colmenar Viejo, ES
AOAC 995.11 UNE EN ISO 6869 AOAC 985.35 UNE-EN 17298
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LABORATOIRE D'ANALYSE DES EAUX DU SYNDICAT DES EAUX DE L'ASSAINISSEMENT ALSACE-MOSELLE

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COFRAC 1-6099 Strasbourg Cedex, FR
ISO 5815-1 DIN ISO 15923-1 EN 13087-2 DIN EN ISO 7887 DIN EN ISO 13395 + 3 more
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LABORATOIRE D'ETUDE ET DE RECHERCHE EN ENVIRONNEMENT ET SANTE (LERES)

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COFRAC 1-1951 Rennes Cedex, FR
DIN EN ISO 14403-2 NF T 90-412 DIN EN ISO 7899-1 NF EN ISO 7887 – méthode C ISO 5815-1 + 3 more
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LABORATOIRE DEP ANALYSES RECHERCHES

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COFRAC 1-0871 Coulounieix-Chamiers, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 DIN EN ISO 10304-1 NF-T 90-101 NF T90-015-1 + 3 more
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LABORATOIRE DEPARTEMENTAL D'ANALYSES

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COFRAC 1-0833 Mende, FR
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LABORATOIRE DEPARTEMENTAL D'ANALYSES DE GIRONDE

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COFRAC 1-1466 Pessac Cedex, FR
NF V08-106 NF T 90-412 NF EN ISO 7887 – VDE 414-9-11 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-0551 Laon Cedex, FR
DIN ISO 11466 NF X31-120 DIN EN ISO 11885 NF X31-147 DIN EN 16175-1 + 3 more
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LABORATOIRE DEPARTEMENTAL DE LA COTE D'OR

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COFRAC 1-0796 Dijon Cedex, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 DIN EN ISO 13395 NF T 90-412 DIN EN ISO 7899-1 + 3 more
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LABORATOIRE DEPARTEMENTAL DE TARN-ET-GARONNE

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COFRAC 1-7330 Montauban, FR
DIN EN ISO 10703 NF T 90-412 DIN EN ISO 21528-1 DIN EN ISO 7899-1 VDE 414-9-11 + 3 more
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Architectural and acoustic design Building construction and commissioning Educational facilities management Broadcasting and media production Hospitality and entertainment venues

Related Standards

  • ISO 3382-1 Acoustics - Measurement of room acoustic parameters - Part 1: Performance spaces
  • EN 60268-16 Sound system equipment - Objective rating of speech intelligibility by speech transmission index
  • ISO 140-4 Acoustics - Measurement of sound insulation in buildings and of building elements - Part 4: Field measurements of airborne sound insulation between rooms

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