Influence of texture spectra on CPX noise of SMA pavements

J. Luong , V.F. Vázquez , M. Bueno , F Terán , S.E. Paje

This work presents an experimental study of the influence of road texture profiles on the close proximity (CPX) noise of road surface courses type Stone Mastic Asphalt (SMA), which were used for rehabilitation of a road section. Acoustical field characterization has been performed through the measurement of CPX noise spectra with TiresonicMk4-LA2IC. Road profiles along the test sections have been measured with a static profiling laser device. These profiles have enabled us to obtain, by numerical calculations, results of the Mean Profile Depth (MPD) calculated over a certain profile distance (baseline), and the Texture Profile Level (Lt) as a function of wavelength. One of the aims of this study was to analyse the relationship between texture spectra and the noise emitted by the tyre/pavement interaction. In addition, normal incidence sound absorption spectra of compacted SMA sample cores also have been measured using the two-microphone impedance tube.

Mots clés: texture spectrum; SMA mixture; noise spectrum; CPX noise

Domaines: Acoustique [physics.class-ph]

J. Luong, V.F. Vázquez, M. Bueno, F Terán, S.E. Paje. Influence of texture spectra on CPX noise of SMA pavements. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810766⟩