What is ISO/TR 17534-4 about?
ISO/TR 17534-4 facilitates a standardized interpretation and a verifiably consistent software implementation of the sound propagation part of the calculation method CNOSSOS -EU: 2015 according to ISO/TR 17534-1.
ISO/TR 17534-4 provides an agreed interpretation of ambiguous aspects of the sound propagation part of CNOSSOS -EU: 2015, a set of illustrative test cases along with reference solutions, and an example of a template form for the declaration of conformity for software manufacturers.
Who is ISO/TR 17534-4 for?
ISO/TR 17534-4 on recommendations for quality-assured implementation of the COMMISSION DIRECTIVE (EU) is relevant to:
- Software developers
- Software manufacturers
Why should you use ISO/TR 17534-4?
Each part of ISO/TR 17534 series addresses a specific outdoor sound calculation method for which they provide an agreed interpretation of ambiguous aspects, a set of illustrative test cases along with reference solutions, and an example of a template form for the declaration of conformity for software developers.
ISO/TR 17534-4 addresses the calculation method laid down in the COMMISSION DIRECTIVE (EU) 2015/996. ISO/TR 17534-4 aims at improving the consistency and comparability of noise assessment results across the EU Member States which are performed based on the data becoming available through the consecutive rounds of strategic noise mapping. ISO/TR 17534-4 assists the user with the propagation of sound outdoors in CNOSSOS -EU: 2015, which is calculated with a ray-based energetic model. Attenuations are calculated in eight-octave bands, and separately for two idealized meteorological conditions labelled homogeneous and favourable. Finally, the A-weighted exposure level at a receiver position is given as the weighted energetic sum over all sources, paths, meteorological conditions, and octave bands.
Overall, ISO/TR 17534-4 is helpful as it assists with the calculation of noise propagation for road, railway, industrial sources. ISO/TR 17534-4 describes a method for calculating the attenuation of sound during propagation outdoors to predict the levels of environmental noise at a distance from a variety of sources.
