Analysis and noise control strategies of rolling noise due to delivery trolley
Résumé
In France and in many western countries, standard housing buildings often include commercial surfaces on the ground floor. While providing appreciated services during day time, this arrangement may cause highly perturbating noise in the upper floors of the building due to delivery operations. In particular, delivering and shelving operations include displacements of trolleys resulting in rolling and impact noise. Contrary to impact noise which is considered in the actual standards, rolling noise is not addressed. This is critical since impact excitation has little similarities with excitation due to e.g. a rolling trolley. Therefore, noise treatments designed with impact sound source may not be suitable for rolling noise sources. Based on measured illustrations of this problematic, the present work aims at designing a general methodology (i) to characterise the rolling noise, (ii) to predict the noise reduction efficiency and (iii) to design/optimise the noise control treatment. Discussion is based on measured data of acceleration spectra obtained for several types of surfaces (flat concrete, tiled/paved floor). Moreover, a model is implemented using characterised material data for several damping materials. This methodology allows to understand mechanisms of noise reduction and offers interesting perspectives for designing improved sound proofing materials.
Domaines
Acoustique [physics.class-ph]
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