Acoustics - Rating of sound insulation in buildings and of building elements - Part 1: Airborne sound insulation
1Key Takeaways
This document a) defines single-number quantities for airborne sound insulation in buildings and of building elements such as walls, floors, doors, and windows, c) gives rules for determining these quantities from the results of measurements carried out in onethird-octave or octave bands for example in accordance with …
2Expert Interpretation
This article deeply interprets the single-value evaluation method for airborne sound insulation performance of buildings and components in ISO 717-1:2020. It covers the calculation process of weighted sound pressure level difference Rw, the application scenarios of spectrum correction term C/Ctr, and the difference analysis between laboratory and field measurements, helping you to accurately perform international standardized acoustic evaluation.
Analysis of the core content of the standard
Scope of application
This standard is applicable to the evaluation of airborne sound insulation in the following scenarios:
- Conversion of laboratory measurement results of building components (walls, floor slabs, doors and windows, etc.)
- On-site sound insulation performance evaluation of buildings
- Consideration of different spectral characteristics such as traffic noise and indoor noise
Measurement frequency range: 1/3 octave 100-3150Hz or octave 125-2000Hz
Calculation specification for single-value evaluation quantity
Reference curve comparison method
| Steps | Operation requirements | Tolerance limit |
|---|---|---|
| 1. Data preparation | The measurement result is retained to 1 decimal place | — |
| 2. Curve shift | Adjust the reference curve in 1dB steps | The total adverse deviation is ≤32dB (1/3 octave) |
| 3. Determine Rw | Take the reference value after shifting at 500Hz | ±0.1dB uncertainty expression |
Typical case
The measurement result of a partition wall is
Spectrum type Applicable noise source Typical correction value Spectrum 1 (C) Life noise, high-speed railway -1～0dB Spectrum 2 (Ctr) Road traffic, low-speed train -5～-3dB
Engineering application suggestions: Rw+Ctr≥45dB is often used in building codes as the facade sound insulation requirement.
Technology evolution and standard update
Main changes in the 2020 version
- Integrate the content of Chapter G.6 of ISO 10140-1:2016
- Incorporate the test facility requirements of Appendix B of ISO 10140-5:2010
- Update the list of normative references
Add the evaluation method of Extended frequency range (50-5000Hz), see Appendix B of the standard for details.