New vehicle noise emission for French traffic noise prediction

• Published in: Applied acoustics 2010-09, Vol.71 (9), p.861-869
• Main Authors: Hamet, Jean-Françcois, Besnard, Francis, Doisy, Sonia, Lelong, Joël, le Duc, Emmanuel
• Format: Article
• Language: English
• Subjects: Acoustics; Applied sciences; Ecology, environment; Environment and Society; Environmental Sciences; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Ground, air and sea transportation, marine construction; Health; Life Sciences; Noise: its effects and control; Physics; Power unit noise; Prediction; Road transportation and traffic; Rolling noise; Traffic noise; Vehicle noise emission
• ISSN: 0003-682X; 1872-910X
• DOI: 10.1016/j.apacoust.2010.05.003

Traffic noise prediction models in France are based on vehicle noise emission values defined by the French Guide du Bruit des Transports Terrestres (Noise Guide for Ground Transport – Noise levels prediction). These emission values are suited for models addressing the noise assessments of road infrastructures and the dimensioning of acoustic protections, needing traffic noise estimations in terms of Ł Aeq over a long period of time (an hour or more). The values, obtained from measurements collected in the 70s, are updated in the publication of a new guide (Methodological Guide, Vehicle noise emissions, to be published), which addresses the road surface influence on tyre/road noise. The emission values are now expressed through the contributions of a power unit component, function of traffic speed, traffic flow type and road declivity, and of a rolling noise component, function of traffic speed and road pavement. The paper outlines the procedures followed to determine the components, gives their numerical values, and illustrates some vehicle noise emissions.