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
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DIN EN ISO 3382-1
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BS EN ISO 3382-1
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NF EN ISO 3382-1
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UNI EN ISO 3382-1
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UNE EN ISO 3382-1
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NEN EN ISO 3382-1
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DIN EN 60268-16
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BS EN 60268-16
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NF EN 60268-16
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UNI EN 60268-16
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UNE EN 60268-16
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NEN EN 60268-16
cartridges, based on HTM 20309.201 to 9.212 and BS EN ISO35 °C/3 days based on HTM 2030section 9.201 to 9.212, BS ENISO 15883-1:2009 6.4.2.3 and+ 3 more
Architectural and acoustic designBuilding construction and commissioningEducational facilities managementBroadcasting and media productionHospitality and entertainment venues
Related Standards
ISO 3382-1Acoustics - Measurement of room acoustic parameters - Part 1: Performance spaces
EN 60268-16Sound system equipment - Objective rating of speech intelligibility by speech transmission index
ISO 140-4Acoustics - Measurement of sound insulation in buildings and of building elements - Part 4: Field measurements of airborne sound insulation between rooms
Scope