ISO 12354-1:2017

Overview - ISO 12354-1:2017 (Building acoustics, airborne sound insulation)

ISO 12354-1:2017 provides calculation models to estimate airborne sound insulation between adjacent rooms by combining measured element data and theoretical propagation methods. The standard defines a detailed frequency-band model (1/3-octave bands from 100 Hz to 3150 Hz, optionally down to 50 Hz) and a simplified model for direct calculation of single-number ratings. It describes required input quantities, calculation principles, limitations and how to handle direct and flanking transmission between building elements.

Key technical topics and requirements

• Calculation models
  • Detailed model: frequency-band calculations based on measured data for direct and indirect (flanking) transmission and structural propagation theory.
  • Simplified model: restricted application; calculates single-number ratings (e.g., R, D, Dn) directly from element ratings.
• Frequency range: 1/3-octave bands from 100 Hz to 3 150 Hz (extendable to 50 Hz if data available - Annex I).
• Transmission paths: explicit treatment of direct airborne transmission and indirect/flanking transmission through junctions and structural elements.
• Inputs and outputs
  • Uses element performance data (sound reduction index, mass per area, junction characteristics).
  • Produces frequency-band results and enables derivation of single-number ratings in accordance with ISO 717‑1.
• Accuracy and uncertainty
  • Guidance on expected accuracy, and an uncertainty estimation method for the simplified model (Annex K).
• Guidance and examples
  • Normative symbols (Annex A), informative annexes with practical guidance (Annex J), calculation examples (Annex L), and low-frequency treatment (Annex I).
• Applicability
  • Addresses both heavy and lightweight constructions and specifies limitations where models may not apply.

Practical applications - who uses ISO 12354-1

• Acoustical consultants and engineers: predict room-to-room airborne sound insulation during design, perform pre-compliance checks.
• Architects and building designers: evaluate partition and junction choices to meet acoustic specifications.
• Manufacturers of building elements: translate laboratory element data into building-level performance predictions.
• Test laboratories and code authorities: link laboratory measurements (ISO 10140, ISO 10848, ISO 15186) to in-situ building performance expectations.
• Software developers: implement calculation engines for acoustic prediction tools and compliance checks.

Related standards

• ISO 717-1 - Rating of sound insulation (single-number derivation)
• ISO 10140 series - Laboratory measurement of sound insulation of building elements
• ISO 10848 series - Laboratory measurement of flanking transmission
• ISO 15186-3 - Low-frequency measurement methods

ISO 12354-1:2017 is essential where accurate estimation of airborne sound insulation from element data is needed - enabling better design decisions, product selection and regulatory compliance in building acoustics.