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 LC10.160 San Fernando de Henares, ES
-95 kPa ≤ P < -1 kPa -1 kPa ≤ P < -100 P 5 kPa ≤ P < 80 kPa 80 kPa ≤ P ≤ 120 kPa 0 MPa ≤ P ≤ 2 MPa 2 MPa < P ≤ 20 MPa 20 Punto triple del agua (0,01 °C) Punto de fusión del hielo (0,00 °C) -80 + 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
Environmental noise — determination of s UNE-EN ISO 3744 UNE-EN ISO 3746 UNE-EN ISO 11200 UNE-EN ISO 11201 + 3 more
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ENAC LE2773 Madrid, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 UNE-EN ISO 16283-3
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ENAC LE026 Terrassa, ES
Sound power — engineering method using a Mechanical mounting of accelerometers (I Railway brake — anti-slide device (UIC 5 c.1772A>G rs11568367 ISO 3795 + 3 more
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ENAC LE1668 Berriozar, 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
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ENAC LE2009 Villamuriel de Cerrato, ES
UNE-EN ISO 16283-1 UNE-EN ISO 140-4 UNE-EN ISO 140-7 UNE-EN ISO 140-5
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ENAC LE1420 Vinarós, ES
BS EN ISO 16283-1:2014+A1:2017BS EN ISO UNE-EN ISO 16283-2 UNE-EN ISO 16283-3 UNE-EN ISO 3382-2
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ENAC LE1747 Valencia, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-3 UNE-EN ISO 3382-2
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ENAC LE751 Gandia, ES
Environmental noise — determination of s ISO 2631-2 DIN EN ISO 1628-3 UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 + 3 more
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ENAC LE1300 Madrid, ES
DIN EN 12566-7 ISO 20236 on ISO 11905-2:1997 on BS ISO 17289:2014 ISO 1841-2 + 3 more
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ENAC LE1555 Madrid, ES
ISO 4832 ISO 21527-1 ISO 21527-2 DIN EN ISO 6579-1 ISO 7251 + 3 more
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ENAC LE1409 Coslada, ES
Tensile testing of metallic materials (I ISO 4831 ISO 4832 ISO 15214 ISO 21527-1 + 3 more
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ENAC LE2360 Derio, ES
Railway passenger ride comfort evaluatio ISO 5667-11 ISO 5667-4 ISO 5667-10 ISO 15705 + 3 more
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ENAC LE2081 Abrera, ES
ISO 7150-1 ISO 15705 ISO 6878 ASTM E1077-14(2021) ISO 20595 + 3 more
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ISO 3795 DIN EN 60529 IEC 60529: 1989 IEC 60068-2-1 IEC 60068-2-2 + 3 more
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ENAC LC10.235 Rinconada, ES
Tensile testing of metallic materials (I ASTM E 8 ISO 6507-1 BS EN ISO 9015-1:2011 BS EN ISO 9015-2 + 3 more
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ENAC LE2073 Burgos, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 UNE-EN ISO 16283-3
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ENAC LE808 Tres Cantos, ES
Salt spray / neutral salt fog test (ISO Radiated emissions (CISPR 32) Railway braking — thermal analysis (EN 1 Influenza A/H1-2009 DIN EN 50155 + 3 more
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ENAC LE1878 Madrid, ES
Railway wheel-rail interaction — roughne ÖNORM EN ISO 5579 ÖNORM EN ISO 17640 BS EN ISO 5817:2023 BS ISO 9096:2017 + 3 more
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ENAC LE1299 Barcelona, ES
UNE-EN ISO 16283-1 UNE-EN ISO 140-4
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ENAC LC10.017 Leganés, ES
ASTM D2240-15 CEM DI-012 CEM DI-008 CEM DI-021 CEM DI-005 + 3 more
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ENAC LE201 Sada, ES
Railway wheel-rail interaction — roughne DIN EN 13126-19 DIN EN ISO 16911-1 ISO 5667-11 ISO 5667-10 + 3 more
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ENAC LE2307 Puertollano, ES
ISO/IEC 25010 ISO/IEC 25040 ISO/IEC 25012 ISO/IEC 5259-2
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ENAC LE2071 Berriozar, ES
IEC 61400-12-1 IEC 61400-12-3 IEC 61400-12-5 IEC 61400-13 IEC 61400-11:2012/ AMD:2018
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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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