ISO 3382-1:2009 PDF

Acoustics — Measurement of room acoustic parameters — Part 1: Performance spaces

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Title (English):

ISO 3382-1:2009

Acoustics — Measurement of room acoustic parameters — Part 1: Performance spaces

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 26
Publication date:: May 28, 2009
Edition:: ISO IS 3382 edition 1 version 1
ICS:: 91.120.20

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Description (English):

ISO 3382-1:2009 specifies methods for the measurement of reverberation time and other room acoustical parameters in performance spaces. It describes the measurement procedure, the apparatus needed, the coverage required, and the method of evaluating the data and presenting the test report. It is intended for the application of modern digital measuring techniques and for the evaluation of room acoustical parameters derived from impulse responses.

Technical details

Technical committee: ISO/TC 43/SC 2 - Building acoustics
SKU: ISO 3382-1:2009

Abstract

Overview

ISO 3382-1:2009 - "Acoustics - Measurement of room acoustic parameters - Part 1: Performance spaces" specifies standardized methods for measuring reverberation time and other room acoustical parameters in performance spaces (concert halls, theatres, auditoria). The standard defines measurement procedures, required apparatus, coverage (positioning and spatial averaging), data evaluation from impulse responses, and test-report presentation. It is intended for modern digital measuring techniques and for deriving auditorium measures from recorded impulse responses.

Key topics and technical requirements

Parameters covered: Reverberation time (T), early-decay measures and other room acoustic metrics derived from impulse responses (see annexes for auditorium, binaural and stage measures).
Measurement methods: Interrupted-noise method and integrated impulse-response method (reverse-time integration of squared impulse responses).
Equipment:
- Sound source: near-omnidirectional; Table 1 lists allowable directivity deviations by octave band. Source level must provide sufficient dynamic range (e.g., ≥45 dB above background per band; ≥35 dB if only T is required).
- Microphones and filters: Omnidirectional microphones; microphone diaphragm preferably ≤13 mm (up to 26 mm allowed with correction). Measurement systems should meet IEC 61672-1 Type 1 and IEC 61260 filter requirements.
- Recording: No AGC; record length at least 5 s plus expected reverberation time; playback/record speed constraints when using tape-based systems.
Signal processing: Use of MLS or sine-sweep techniques to derive impulse responses; reverse-time integration to form decay curves.
Averaging and evaluation: Spatial averaging across receiver positions; evaluation of decay curves (averaging time close to T/30 for exponential averaging, or

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Parameters covered: Reverberation time (T), early-decay measures and other room acoustic metrics derived from impulse responses (see annexes for auditorium, binaural and stage measures).
Measurement methods: Interrupted-noise method and integrated impulse-response method (reverse-time integration of squared impulse responses).
Equipment:
- Sound source: near-omnidirectional; Table 1 lists allowable directivity deviations by octave band. Source level must provide sufficient dynamic range (e.g., ≥45 dB above background per band; ≥35 dB if only T is required).
- Microphones and filters: Omnidirectional microphones; microphone diaphragm preferably ≤13 mm (up to 26 mm allowed with correction). Measurement systems should meet IEC 61672-1 Type 1 and IEC 61260 filter requirements.
- Recording: No AGC; record length at least 5 s plus expected reverberation time; playback/record speed constraints when using tape-based systems.
Signal processing: Use of MLS or sine-sweep techniques to derive impulse responses; reverse-time integration to form decay curves.
Averaging and evaluation: Spatial averaging across receiver positions; evaluation of decay curves (averaging time close to T/30 for exponential averaging, or

ISO 3382-1:2009 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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