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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Lehren- und Meßgerätewerk Schmalkalden GmbH LMW-Kalibrierservice

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(ein- und mehrgängige zylindrische Außen- und symmetrischem und unsymmetrischem Profil) Außengewinde + 3 more
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Leibniz-Institut für Werkstofforientierte Technologien - IWT Amtliche Materialprüfungsanstalt der Freien Hansestadt Bremen

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DAkkS D-PL-11240-01-01 Bremen, DE
DIN EN 60601-2-4 IEC 60512-4-1 DIN EN 124-2 IEC 60512-4-3 DIN EN 60601-2-44 + 3 more
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Life Environmental Services

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UKAS 0610 Bishop's Stortford, GB
(HSG 248) – 2021 QSOP 01 based on HSG 248 (PCM) based on HSG 248 QSOP 03 based on HSG 248
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Life Environmental Services

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UKAS 0340 Bishop's Stortford, GB
(HSG 264, 2012) Appendix 5 of HSG 227 (2004)
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Limbach Nord GmbH MVZ Labor Limbach Lehrte

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DAkkS D-ML-21457-02-00 Lehrte, DE
Aluminium Blei Eisen, Kupfer Ampicillin Cefepim + 3 more
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Linde GmbH Linde Gas Deutschland

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DAkkS D-K-21622-01-00 Unterschleißheim, DE
anteile Kohlenstoffmonoxid Kohlenstoffdioxid Methan Ethan + 3 more
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Linsch Consultants

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UKAS 2432 Newport, GB
(HSG 248) – 2021 staining based on HSG 248
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Liverpool University Hospitals NHS Foundation Trust

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UKAS 9656 70 Pembroke Place, GB
accordance with (EN ISO 14644- BS EN ISO 14644-1:2015
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Logical Compliance

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UKAS 29622 Chelmsford, GB
(HSG 264, 2012)
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London Borough of Enfield

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UKAS 1119 Enfield, GB
staining based on HSG 248 (HSG 248) – 2021 (PCM) based on HSG 248
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London Laboratories

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UKAS 9681 Hextable, GB
(HSG 248) – 2021 ASB04 based on HSG 248 (PCM) based on HSG 248
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Lucion Services

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staining based on HSG 248 (HSG 248) – 2021 (PCM) based on HSG 248 3492, ISO14966 and HSG 248 DIN EN 14629 + 3 more
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Ludwig Schneider Messtechnik

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Ludwig-Maximilians-Universität München Max von Pettenkofer-Institut Lehrstuhl für Medizinische Mikrobiologie und Krankenhaushygiene

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Cryptococcus neoformans Cardiolipin AK Escherichia coli K1-AG Haemophilus influenzae Metromec Software AG + 3 more
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M E Broadstone Limited

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UKAS 0227 Poole, GB
Plain ring gauges (taper) Plain gap gauges (parallel) Plain plug gauges (taper) LENGTH ANGLE + 3 more
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MAPE - Métier Environnement

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COFRAC 1-1678 Etupes, FR
NF X43-551 ETSI EN 301 489-1 V2.2.3 2019-11 NF X 44-052 DIN EN 13284-1 DIN EN 14385 + 3 more
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COFRAC 1-6837 Lievin, FR
DIN EN 14385 NF X43-551 ETSI EN 301 489-1 V2.2.3 2019-11 IS EN 1948-1:2006 2006 DIN EN 14789 + 3 more
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MARGARIDA AUDITORES ACUSTICOS, S.L. (Unipersonal) (Margarida)

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ENAC LE441 Madrid, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 UNE-EN ISO 16283-3 UNE-EN ISO 140-7 UNE-EN ISO 140-4 + 2 more
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MATED

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ACCREDIA 01130 Trento, IT
DIN EN 13180 ISO 11357-1 DIN EN IEC 62631-3-1 DIN EN IEC 62631-3-2 DIN EN IEC 60068-2-11 + 3 more
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ENAC LC10.124 Collbató, ES
0,005 l/min ≤ Q ≤ 50 l/min 0,5 m3/h≤ Q ≤ 2,8 m3/h 0,6 m3/h  Q  2,8 m3/h 20 m3/h  Q  30 m3/h 30 m3/h < Q  70 m3/h + 3 more
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MD ELEKTRONIK GmbH MD Test Laboratory (Prüflabor)

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DAkkS D-PL-19548-01-03 Waldkraiburg, DE
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MDI Limbach Berlin

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DAkkS D-ML-13341-01-01 Berlin, DE
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DAkkS D-K-21980-02-01 Hennigsdorf, DE
Kraft 50 N Sound power — survey method (ISO 3746) > 200 N Railway brake — automatic variable load 0,2 kN + 1 more
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MESA Meß- und Regeltechnik Vertriebs- und Service

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DAkkS D-K-20515-01-00 Filderstadt, DE
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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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