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
๐Ÿ‡ฉ๐Ÿ‡ช DIN EN ISO 3382-1 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN ISO 3382-1 ๐Ÿ‡ซ๐Ÿ‡ท NF EN ISO 3382-1 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN ISO 3382-1 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN ISO 3382-1 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN ISO 3382-1 ๐Ÿ‡ฉ๐Ÿ‡ช DIN EN 60268-16 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN 60268-16 ๐Ÿ‡ซ๐Ÿ‡ท NF EN 60268-16 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN 60268-16 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN 60268-16 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN 60268-16
1,868 Accredited labs
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Fugro GB

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UKAS 0919 Wallingford, GB
BS 1377: Part 2: 1990 BS 1377-3:2018 + A1:2021 ASTM D4186-12: 2020 ASTM D5334-22 ASTM D2216-19 + 3 more
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UKAS 10287 Chelmsford, GB
(HSG 264, 2012)
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UKAS 0580 Bexhill, GB
FLOW Gas pressure (absolute) Gas pressure (gauge) DC CURRENT TEMPERATURE + 3 more
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UKAS 2083 Wellington, GB
(HSG 248) โ€“ 2021 M4 based on HSG 248 (PCM) based on HSG 248 M3 based on HSG 248 (HSG 264, 2012) + 1 more
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G&M Procter

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UKAS 2727 Perth, GB
based on ISO 11133:2014+Amd dependent) based on BS EN based on BS EN 12322:1999
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UKAS 4037 Welwyn Garden City, GB
(HSG 248) โ€“ 2021 (PCM) based on HSG 248 PRO02 based on HSG 248
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UKAS 4203 Pontypridd, GB
BS EN ISO 18119:2018+A1:2021 BS EN 14876:2007/Internal proceduresDiss BS EN ISO 10460:2018 ISO 23088:2020
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UKAS 1278 Glasgow, GB
(HSG 248) โ€“ 2021 staining based on HSG 248 F2011 (BS 696:Part 2:1989) F0131 (BS 1741:10-1:1989) using F0008 (BS 696:Part 2:1989) using + 3 more
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UKAS 8856 Christchurch, GB
DIN EN 15136 DIN EN 137 Clause 6.24, EN 13274-5:2001 Clause 7.4.1.1, EN 13274-3:2001 Clause 7.4.1.2, EN 13274-3:2001 + 3 more
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UKAS 7751 Sawbridgeworth, GB
(HSG 264, 2012)
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UKAS 9528 Stevenage, GB
Appendix 5 of HSG 227 (2004) (HSG 264, 2012)
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UKAS 2735 Portsmouth, GB
(HSG 248) โ€“ 2021 (PCM) based on HSG 248
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UKAS 0363 Portsmouth, GB
HSG 227 (2004)) (HSG 264, 2012) HSG 264 (2012) and Appx. 3 of Appendix 5 of HSG 227 (2004))
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Guymark UK

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UKAS 4006 Birmingham, GB
Attenuator linearity AUDIOMETERS:
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UKAS 4026 Meopham, GB
(HSG 248) โ€“ 2021 (PCM) based on HSG 248 (HSG 264, 2012)
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HORIBA MIRA

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UKAS 1105 Nuneaton, GB
IEC/CISPR 25 DIN EN 55025: 2018 ISO 7637-2 ISO 11451-1 IEC/CISPR 12 + 3 more
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UKAS 0642 Ross-on-Wye, GB
(HSG 248) โ€“ 2021 M003 based on HSG 248 (PCM) based on HSG 248 M002based on HSG 248 HSG 227 (2004)) + 2 more
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UKAS 0024 Southsea, GB
(HSG 248) - 2021 ASB/SOP/OM8 based on HSG 248 ASB/SOP/OM6 based on HSG 248 DIN EN 12697-11 on BS 4401:Part 3:1970(1986) + 3 more
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UKAS 4083 Woking, GB
ISO 7171 ISO 1407 BS EN ISO 140-4:1998 BS EN ISO 717-2:2020
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UKAS 8452 Manchester, GB
BS 2790 - Specification for the design a BS 1113 - Specification for the design a BS EN 13480 Parts 1 to 8 - Metallic EN 13445 โ€“ Parts 1 to 10 Unfired pressur BS EN ISO 15614 and ASME IX + 3 more
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UKAS 9452 Whaddon, GB
DIN EN 61400-11 IEC 61400-11:2012/ AMD:2018
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Healthy Abode

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UKAS 10263 Harlow, GB
ISO 7171 BS EN ISO 140-4:1998 BS EN ISO 16283-1:2014+A1:2017BS EN ISO BS EN ISO 16283-2:2020 HTM 08-01 - 2013 + 2 more
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UKAS 4659 Newry, GB
(HSG 264, 2012) and Appx. 3 of HSG 227 (2004)) Executive guides HSG 264 (2012)
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UKAS 9868 Daventry, GB
DIN EN 1026 DIN EN 12046-2 BS 6375-1:2015 + A1:2016 and the DIN EN 1027 DIN EN 1629 + 3 more
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UKAS 24561 Hertford, GB
(HSG 264, 2012)
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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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