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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UNE-EN ISO 16283-2 UNE-EN ISO 140-7 UNE-EN ISO 3382-2 UNE-EN ISO 16283-1 UNE-EN ISO 140-4
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ACCREDIA 02189 Catania, IT
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NF V 05-116 NF V 04-415 NF V 04-407 NF V04-403 NF V04-401 + 3 more
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COFRAC 1-7141 Parcay Meslay, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 NF EN ISO 7887 – NF T 90-412 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-7142 Saint Ave, FR
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ISO 11731 SM 5220 UNE-EN ISO 6222 UNE-EN ISO 20236 UNE EN 27888 + 3 more
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ISO 16063-21 EN 55016-1-6 CEM EL-025 UNE-EN ISO 376 UNE-EN ISO 7500-1 + 3 more
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UNE-EN ISO 10704 UNE 73350-1 UNE 73311-5 ISO 11665-4 UNE 31010 + 1 more
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IEC 61000-4-13: 2002 DIN EN 50121-3-2 IEC 61000-3-2: 2014 DIN EN 60601-1-2 IEC 61000-3-3 + 3 more
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ENAC LC10.149 Madrid, ES
(380 - 780 nm) 1 < R ≤ 100 0,01< DO ≤ 0,1 0,1 < DO ≤ 0,3 1,1 < DO <
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DIN EN 1040 DIN EN 1656 DIN EN 14561 IEC 60127-6 DIN EN 13727 + 3 more
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(500 ± 50) mPa · s (12500 ± 1250) mPa ·
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2 · 10-6 mol/mol  C  100 · 10-6 mol/mo
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COFRAC 1-1296 Heudebouville, FR
DIN EN ISO 1833-6 DIN EN ISO 1833-2 DIN EN ISO 1833-7 DIN EN ISO 1833-1 DIN EN ISO 1833-20 + 3 more
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UNE-EN ISO 16283-1 UNE-EN ISO 16283-3 UNE-EN ISO 16283-2
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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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