ISO 3382-1 Committee Draft Released: Why This Revision Matters for Room Acoustics

Introduction

The committee draft of ISO 3382-1 has just been released. This international standard defines how we measure reverberation time (RT) and related room acoustic parameters in performance spaces such as concert halls and theatres.

While the details may seem subtle, a revision here carries weight: it impacts how acoustic consultants, architects, contractors, and venue owners design, specify, commission, and verify music and speech venues worldwide.

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What is ISO 3382-1?

ISO 3382-1, titled “Acoustics — Measurement of room acoustic parameters — Part 1: Performance spaces”, provides standardized methods for measuring:

• Reverberation Time (RT)
• Speech Clarity (C50)
• Music Clarity (C80)
• Other room-acoustic parameters critical for performance spaces

This standard ensures consistency in design evaluation, acoustic measurements, and project acceptance criteria across the globe.

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Why Do These Revisions Matter?

Even minor changes in definitions, procedures, or tolerances can ripple across multiple phases of a project:

• Design briefs: Consultants may need to adjust specifications for compliance.
• Commissioning & acceptance testing: Measurement methods may be more stringent or redefined.
• Verification: Test results must align with updated tolerances.

In short, these updates could affect everything from the initial design intent to the final handover of performance spaces.

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Who Should Pay Attention?

• Architects & Acoustic Engineers → Must update design methods to remain compliant.
• Contractors & System Integrators → Measurement and acceptance workflows may shift.
• Venue Owners & Operators → Compliance impacts usability, reputation, and performance quality.

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Looking Ahead

The upcoming revision of ISO 3382-1 may tighten requirements on how we specify and verify room parameters, ensuring more reliable and standardized results across the industry.

Geonoise Asia will continue to monitor these changes and provide independent consulting to help clients stay aligned with the latest standards in room acoustics and building acoustics.