ISO 717-1:2020

Overview

ISO 717-1:2020 - Acoustics: Rating of sound insulation in buildings and of building elements - Part 1: Airborne sound insulation defines how to convert frequency-dependent airborne sound insulation measurements into standardized, single-number ratings. These ratings (e.g., Rw, R′w) and associated spectrum adaptation terms (C, Ctr) allow consistent comparison of walls, floors, doors, windows and whole-building partitions and simplify the formulation of acoustical requirements in building codes.

Key topics and technical requirements

• Single-number quantities: The standard sets the method to obtain a single-number value (in dB) from one-third-octave or octave band measurements by comparing measured values with ISO reference curves and shifting the curve to maximize the sum of unfavorable deviations within limits.
• Measurement inputs: Results from laboratory and field methods (commonly ISO 10140-2 for lab and ISO 16283-1 for field) are used as input. For laboratory measurements (ISO 10140-2) one-third-octave band values are required.
• Frequency ranges:
  • One-third-octave band comparison: 100 Hz to 3 150 Hz
  • Octave band comparison: 125 Hz to 2 000 Hz
• Procedure details:
  • Measurement data reported to one decimal place.
  • Reference curve is shifted in 1 dB steps (0.1 dB optional for expressing uncertainty) until the sum of unfavorable deviations reaches but does not exceed specified maxima (32.0 dB for 16 one-third-octave bands; 10.0 dB for 5 octave bands).
• Spectrum adaptation terms: Two defined spectra are used to calculate adaptation terms (C and Ctr) that account for typical source spectra (e.g., interior noise vs. traffic). Annex A explains their use; Annex B addresses enlarged frequency ranges.
• Outputs and reporting: Rules for statement of results include how to present performance of building elements and buildings, and how to express uncertainty.

Applications and intended users

ISO 717-1:2020 is used by:

• Acoustic consultants and engineers for project specifications, performance verification and noise control design
• Test laboratories and manufacturers to rate and certify building elements (walls, partitions, doors, windows, linings)
• Architects and building designers integrating sound insulation requirements into construction details
• Regulatory bodies and building control authorities to define and enforce building code limits and acoustic performance criteria

Practical benefits include standardized comparisons of products and constructions, clearer performance requirements in contracts and regulations, and better-informed design choices to meet occupant comfort and regulatory compliance.

Related standards

• ISO 10140-2 (laboratory measurement of airborne sound insulation)
• ISO 16283-1 (field measurement of airborne sound insulation)
• ISO 10140-1, ISO 10140-5, ISO 10848-2, ISO 15186-1 (related measurement and flanking transmission guidance)

Keywords: ISO 717-1:2020, airborne sound insulation, sound insulation rating, single-number quantities, Rw, R′w, spectrum adaptation terms, building acoustics.