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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ENAC LE1260 Cáceres, ES
ISO 13164-4 OM H-3 based on ISO 9698:2019 ISO 13161 ISO 18589-6 ISO 11665-4 + 3 more
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ENAC LE1340 San Ginés, ES
Radiated emissions (CISPR 32) Influenza A/H1-2009 ISO 4831 ISO 4832 ISO 21527-1 + 3 more
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ISO 5-3 ISO 2813 ISO 3864-4 UNE-EN ISO 9342-1 UNE-EN ISO 8598-1 + 3 more
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ENAC LE670 Pilar de la Horadada, ES
Sound power — engineering method using a ISO 7251 ISO 16649-2 ISO 11290-1 ISO 11290-2 + 3 more
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ISO 23695 UNE-EN ISO 6222 UNE-EN ISO 16266 UNE-EN ISO 9308-1 UNE-EN ISO 7899-2 + 3 more
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ENAC LE1782 Paterna, ES
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LABS & TECHNOLOGICAL SERVICES AGQ

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ENAC LE1322 Burguillos, ES
DIN EN 15934 ISO 5667-11 ISO 13166 ISO 11083 DIN EN 12566-3 + 3 more
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ENAC LE2494 Paterna, ES
ISO/IEC 15408 ISO/IEC 18045 UNE 320001
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ENAC LE894 Bellaterra, ES
Railway brake handbooks (UIC 547) Railway braking — thermal analysis (EN 1 ISO 5660-1 DIN EN IEC 60068-2-52 IEC 61000-4-2: 2008 + 3 more
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LINDE GAS ESPAÑA, S.A. (Unipersonal)

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ENAC LC10.040 Rubí, ES
10 · 10-6 mol/mol  C  20 · 10-6 mol/mo 10 · 10-6 mol/mol  C  5000 · 10-6 mol/ 1 · 10-6 mol/mol  C  10 · 10-6 mol/mol 1 · 10-6 mol/mol  C  5 · 10-6 mol/mol 10 · 10-6 mol/mol  C  100 · 10-6 mol/m + 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 3382-2 UNE-EN ISO 140-4 + 2 more
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MCV

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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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ENAC LC10.163 Badalona, ES
Rangos de caudal (m3/h): 1 m3/h ≤ Q < 25
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ENAC LC10.236 San Ginés, ES
5 kg 1 g 2 g 5 g 10 g 20 g 50 g 100 g 200 g 5 10 kg 20 kg 100 kg 200 kg 500 kg 1000 kg 1 g 2 g 5 g 10 g 20 g 50 g 100 g 200 g 5 + 2 more
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NIPPON SANSO ESPAÑA, S.L. (Unipersonal)

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ENAC LC10.077 Madrid, ES
2 · 10–6 mol/mol  C  100 · 10–6 mol/mo 0,1 · 10–2 mol/mol < C  2,5 · 10–2 mol/ 1 · 10–6 mol/mol  C  100 · 10–6 mol/mo 5 · 10–6 mol/mol  C  20 · 10–6 mol/mol 0,15 · 10–2 mol/mol  C  20 · 10–2 mol/ + 3 more
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OCA INSPECCIÓN, CONTROL Y PREVENCIÓN, S.A. (Unipersonal) (OCA GLOBAL)

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ENAC LE2316 Pozuelo de Alarcón, ES
BS ISO 15713:2006 BS ISO 9096:2017 UNE-EN ISO 16911-1 UNE-EN 15058 UNE-EN 14792 + 3 more
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PRECOVER ACÚSTICA Y MEDIO AMBIENTE, S.L.P.

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ENAC LE1844 Valencia, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 UNE-EN ISO 16283-3 UNE-EN ISO 3382-2 UNE-EN ISO 140-4 + 2 more
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PRODUCTOS AGROVIN

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ENAC LE2092 Alcázar de San Juan, ES
UNE-EN ISO/IEC 17025
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ENAC LE1517 Onda, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 UNE-EN ISO 16283-3 UNE-EN ISO 140-4 UNE-EN ISO 140-7 + 1 more
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ENAC LE2055 Nigrán, ES
UNE-EN 1789
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ENAC LC10.264 Sant Martí Sarroca, ES
(2,2 ± 0,1) ⋅ 10-2 mol/mol (99,5 ± 0,5) (15 ± 5) ⋅ 10-6 mol/mol (100 ± 5) ⋅ 10-6 (7,5 ± 0,2) ⋅ 10-2 mol/mol (15 ± 0,5) ⋅
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ROVIRA EQUIPOS

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ENAC LC10.178 Madrid, ES
CEM Ed
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S.E. CARBUROS METÁLICOS

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ENAC LC10.069 Sant Celoni, ES
15 · 10-6 mol/mol  C  3500 · 10-6 mol/ 0,03 · 10-2 mol/mol  C < 0,3 · 10-2 mol 0,3 · 10-2 mol/mol  C  1,1 · 10-2 mol/ 1,1 · 10-2 mol/mol ≤ C < 26 · 10-2 mol/m 1,1 · 10-2 mol/mol ≤ C < 26 · 10-2 mol/m + 3 more
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SAUERMANN IBERICA PUMPS AND INSTRUMENTS, S.L. (Unipersonal)

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ENAC LC10.221 Terrassa, ES
(15 ± 1) ⋅ 10-6 mol/mol (1000 ± 50) ⋅ 10 (8 ± 0,5) ⋅ 10-2 mol/mol (1,4 ± 0,1) ⋅ 1 (3000 ± 150) ⋅ 10-6 mol/mol (9 ± 1) ⋅ 10 (80 ± 8) ⋅ 10-6 mol/mol (100 ± 8) ⋅ 10-6 mol/mol
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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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