Predicting Outdoor Sound

1 Introduction

2 The propagation of sound near ground surfaces in a homogeneous medium

3 Predicting effects of source characteristics

4 Numerical methods based on time-domain approaches

5 Predicting the acoustical properties of ground surfaces

6 Measurements of the acoustical properties of ground surfaces and comparisons with models

7 Influence of source motion on ground effect and diffraction

8 Predicting effects of mixed impedance ground

9 Predicting the performance of outdoor noise barriers

10 Predicting effects of vegetation, trees and turbulence

11 Ray tracing, analytical and semi-empirical approximations for a-weighted levels

12 Engineering models

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• Engenharia electrotécnica
• Engenahria civil, levantamentos e construção
• Acústica e engenharia de som
• Mecânica ondulatória (vibração e acústica)
• Engenharia mecânica

acoustical properties;analytical diffraction;harmonoise model;engineering models;meteorological effects;ground effect;source characteristics;homogeneous medium;outdoor sound prediction;mixed impedance ground;noise barrier performance;near ground surfaces;numerical methods;outdoor noise barriers;outdoor sound propagation;ray tracing;semi-empirical approximations;source motion;time-domain approaches;turbulence;vegetation;Excess Attenuation;Receiver Height;Sound Pressure Level;Flow Resistivity;Plane Wave Reflection Coefficient;Sound Speed Profile;Octave Band;Sound Field;Source Height;Insertion Loss;Total Sound Field;Monopole Source;Sound Propagation;Effective Sound Speed;Green's Function;Noise Barrier;Road Traffic Noise;Surface Impedance;Wave Reflection Coefficient;Surface Wave;Effective Admittance;Equivalent Sound Pressure Levels;Sound Speed