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PD ISO/TR 17534-4:2020 Acoustics. Software for the calculation of sound outdoors - Recommendations for a quality assured implementation of the COMMISSION DIRECTIVE (EU) 2015/996 in software according to ISO 17534-1 >
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PD ISO/TR 17534-4:2020 Acoustics. Software for the calculation of sound outdoors - Recommendations for a quality assured implementation of the COMMISSION DIRECTIVE (EU) 2015/996 in software according to ISO 17534-1, 2020
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Identification of the official documentation
- 5 Uniform and agreed interpretation of ambiguities
- 5.1 General
- 5.2 Sloping objects
- 5.3 Equivalent heights
- 5.4 Alternative statistical approach
- 5.5 Octave band centre frequency fm
- 5.6 Ground factor of the source area, GS
- 5.7 Distances in Figure 2.5.b of CNOSSOS-EU:2015
- 5.8 Equivalent heights in Equation (2.5.20) of CNOSSOS-EU:2015
- 5.9 Rayleigh’s Criterion
- 5.10 Parameter e
- 5.11 Diffraction under favourable conditions
- 5.12 Error in Figure 2.5.f and Equation (2.5.29) of CNOSSOS-EU:2015
- 5.13 Lateral diffraction
- 5.14 Reflection on nearly vertical objects
- 5.15 Retrodiffraction
- 6 Test cases
- 6.1 General
- 6.2 Test cases with intermediate and final results
- 6.2.1 TC01-TC03 — Flat ground with homogeneous acoustic properties
- 6.2.2 TC01 — Reflecting ground (G = 0)
- 6.2.3 TC02 — Mixed ground (G = 0,5)
- 6.2.4 TC03 — Porous ground (G = 1)
- 6.2.5 TC04 — Flat ground with spatially varying acoustic properties
- 6.2.6 TC05 — Ground with spatially varying heights and acoustic properties
- 6.2.7 TC06 — Reduced receiver height to include diffraction in some frequency bands
- 6.2.8 TC07 — Flat ground with spatially varying acoustic properties and long barrier
- 6.2.9 TC08 — Flat ground with spatially varying acoustic properties and short barrier
- 6.2.10 TC09 — Ground with spatially varying heights and and acoustic properties and short barrier
- 6.2.11 TC10 — Flat ground with homogeneous acoustic properties and cubic building — Receiver at low height
- 6.2.12 TC11 — Flat ground with homogeneous acoustic properties and cubic object – receiver at large height
- 6.2.13 TC12 — Flat ground with homogeneous acoustic properties and polygonal object — Receiver at low height
- 6.2.14 TC13 — Ground with spatially varying heights and acoustic properties and polygonal object
- 6.2.15 TC14 — Flat ground with homogeneous acoustic properties and polygonal object — Receiver at large height
- 6.2.16 TC15 — Flat ground with homogeneous acoustic properties and four buildings
- 6.2.17 TC16 — Reflecting barrier on ground with spatially varying heights and acoustic properties
- 6.2.18 TC17 — Reflecting barrier on ground with spatially varying heights and acoustic properties — Reduced receiver height
- 6.2.19 TC18 — Screening and reflecting barrier on ground with spatially varying heights and acoustic properties
- 6.2.20 TC19 — Complex object and 2 barriers on ground with spatially varying heights and acoustic properties
- 6.2.21 TC20 — Ground with spatially varying heights and acoustic properties
- 6.2.22 TC21 — Building on ground with spatially varying heights and acoustic properties
- 6.2.23 TC22 — Building with receiver backside on ground with spatially varying heights and acoustic properties
- 6.2.24 TC23 — Two buildings behind an earth-berm on flat ground with homogeneous acoustic properties
- 6.2.25 TC24 — Two buildings behind an earth-berm on flat ground with homogeneous acoustic properties – receiver position modified
- 6.2.26 TC25 — Replacement of the earth-berm by a barrier
- 6.2.27 TC26 — Road source with influence of retrodiffraction
- 6.2.28 TC27 — Source located in flat cut with retro-diffraction
- 6.2.29 TC28 — Propagation over a large distance with many buildings between source and receiver
- 6.3 Summary of the final results
- 7 Example of a template form for the declaration of conformity
- Bibliography [Go to Page]