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
🇧🇪 NBN EN ISO 3382-1 🇩🇪 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 🇧🇪 NBN EN 60268-16 🇩🇪 DIN EN 60268-16 🇬🇧 BS EN 60268-16 🇫🇷 NF EN 60268-16 🇮🇹 UNI EN 60268-16
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Whole Blood Full blood count | 520 Whole Blood Full blood count | SOP LAB 1 A, B, O, Rh (D) | SOP LAB 11 Blood Phlebotomy | SOP LAB 03 Biochemistry examination activities | Ro + 3 more
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29 Fleet Street

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UKAS 22197 London, GB
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Sound intensity — scanning method (ISO 9 Hand-arm vibration — measurement (ISO 53 Railway testing reference handbook part messeinrichtungen von Pendelschlagwerke und + 3 more
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DAkkS D-K-18164-01-01 Partenstein, DE
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BELAC 772-TEST Bruxelles, BE
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UKAS 0173 London, GB
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UKAS 1931 London, GB
BS 7976-2 (HSG 248) – 2021 (PCM) based on HSG 248 E203 based on HSG 248 E200 based on HSG 248 + 1 more
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UKAS 9372 West Chiltington, GB
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UKAS 25321 London, GB
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UKAS 9260 Dukinfield, GB
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COFRAC 1-5950 Vannes, FR
NF X 43-050 ISO 16000-7 FD T 90-522 FD X 46-033
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ACCREDIA 00007 Vigevano, IT
DIN EN ISO 659 DIN EN ISO 10863 DIN ISO 1817 ISO 37 DIN EN ISO 3741 + 3 more
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ACCREDIA 00925 Napoli, IT
DIN EN ISO 7438 DIN EN ISO 4136 DIN EN ISO 5173 DIN EN ISO 9016 DIN EN ISO 9017 + 3 more
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DAkkS D-K-17303-01-01 Dresden, DE
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DAkkS D-PL-14087-01-03 Plauen, DE
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ENAC LC10.160 San Fernando de Henares, ES
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COFRAC 1-7214 Florange, FR
DIN ISO 16000-4 DIN EN ISO 16017-2 NF X 43-257 NF X 43-267 NF X 43-269 + 3 more
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ENAC LE2968 Palmera, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 UNE-EN ISO 16283-3
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ENAC LE229 Vitoria-Gasteiz, ES
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COFRAC 1-6467 Limoges, FR
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ENAC LE2773 Madrid, ES
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ABB AG Kalibrierlaboratorium für Druck, Durchfluss und Temperatur

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DAkkS D-K-12115-01-00 Minden, 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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