ISO 3382 (Room Acoustics Measurement)

ISO 3382 is the international standard series for measuring room acoustic parameters. Part 1 (2009) covers performance spaces (concert halls, theatres), Part 2 (2008) covers ordinary rooms (offices, classrooms), and Part 3 (2012) covers open-plan offices. The standard specifies measurement procedures, source and receiver requirements, signal processing methods (Schroeder integration), and the acoustic parameters to be reported. For ordinary rooms, ISO 3382-2 requires reporting of reverberation time (T20, T30, EDT) across octave bands with spatial averaging from at least two source positions and three receiver positions. The standard allows interrupted noise, MLS, and swept sine excitation methods. ISO 3382 is the definitive reference for room acoustic measurement worldwide and is cited by virtually all building regulations that specify reverberation time limits. Understanding and correctly applying this standard is essential for acoustic consultants.