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
1,868 Accredited labs
20 Countries

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UKAS 0422 Warrington, GB
a) BS 7270:2006 b) BS 3518-3:1963 (Withdrawn) ASTM E1820-18ae1 (Withdrawn) ISO 6892-2 BS EN ISO 204 + 2 more
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AmiaLab

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COFRAC 1-6573 Bagnols Sur Ceze, FR
NF X43-050 (parties utiles de NF X 43-050 NF X 43-269 –
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UKAS 0350 Newhaven, GB
Appendix 5 of HSG 227 (2004))
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UKAS 2713 Newhaven, GB
(HSG 248) – 2021 (PCM) based on HSG 248
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DAkkS D-PL-14501-01-03 Fürth, DE
DIN 19698-1 DIN 19698-2 DIN EN ISO 54321 DIN EN 1744-3 DIN EN 12457-2 + 3 more
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UKAS 0934 Neath, GB
(HSG 248) – 2021 ANC/AS/2 based on HSG 248 DIN EN 14791 IEC 60519-11 DIN EN 13284-1 + 3 more
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UKAS 0165 Neath, GB
(HSG 264, 2012)
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UKAS 4147 Bellshill, GB
requirements of HTM 01-06 Part E 35 °C/3 days based on HTM 2030 Part E, WHTM 01-06 Part E & BS EN ISO 15883-4 using R2A and Part E, HTM 0106 Part E, WHTM 01- + 3 more
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UKAS 4116 Brighton, GB
ISO 7171 ISO 1407 BS EN ISO 140-4:1998 BS EN ISO 717-2:2020
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UKAS 30171 Bradford-on-Avon, GB
TORQUE FORCE DC VOLTAGE
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UKAS 4051 Gateshead, GB
BS EN ISO 16283-1:2014+A1:2017BS EN ISO BS EN ISO 16283-2:2020 HTM 08-01 - 2013 BS EN ISO 140-4:1998 BS EN ISO 717-2:2020 + 2 more
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RvA I251 Rotterdam, NL
DIN EN 16407-1 BS EN ISO 10675-1 ÖNORM EN ISO 17636-1 NEN-EN 12732 ÖNORM EN ISO 17636-2 + 3 more
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COFRAC 1-6770 Grande Synthe, FR
DIN EN ISO 6507-1 DIN EN ISO 6508-1 NF T90-111 EN 13087-2 DIN EN 10325 + 3 more
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COFRAC 1-6771 Florange, FR
DIN EN ISO 6508-1 NF T90-111 EN 13087-2 ISO 15705 DIN EN ISO 10523 + 3 more
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DAkkS D-K-17702-01-00 Garching, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO Radiated emissions (CISPR 32) 1) In den CMC sind die erweiterten Messu
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Asbestobel

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UKAS 8502 Nottingham, GB
(HSG 264, 2012)
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UKAS 10243 Fowlmere, GB
Analysts’ Guide (HSG 248) (PCM) based on HSG 248
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UKAS 5835 Prestwick, GB
(HSG 264, 2012)
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UKAS 2230 Prestwick, GB
(HSG 248) – 2021 LSD.ASB.02 based on HSG 248 LSD.ASB.04 based on HSG 248 (PCM) based on HSG 248
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UKAS 10194 Hockliffe, GB
Analysts’ Guide (HSG 248 (PCM) based on HSG 248
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UKAS 0298 East Kilbride, GB
(HSG 264, 2012)
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UKAS 24642 Mansfield Woodhouse, GB
(HSG 264, 2012)
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UKAS 0472 Grays, GB
(HSG 248) – 2021 QOP03 based on HSG 248 (PCM) based on HSG 248 (PCM) based on HSG 248) QOP01 based on HSG 248 + 1 more
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UKAS 10792 Mansfield Woodhouse, GB
(HSG 248) – 2021 (PCM) based on HSG 248
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UKAS 6958 Witney, GB
(HSG 264, 2012) (HSG 248) – 2021
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Industries

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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