A modified Close Proximity method to evaluate the time trends of road pavements acoustical performances |
| |
| Institution: | 1. Internal Medicine, Hospital of Piombino, Livorno, Italy;2. FADOI Foundation, Research Department, Milan, Italy;3. Department of Locomotor System, Division of Rheumatology, ASL3-Azienda Sanitaria Genovese, Genoa, Italy;4. Section of Osteoporosis and Musculoskeletal Diseases, Department of Radiological, Oncological and Anatomical–Pathological Sciences, University “La Sapienza”, Rome, Italy;5. Rheumatology, “G. Pini” Institute, Milan, Italy;6. Department of Medical, Surgical and Neurological Sciences, University of Siena, Italy;7. Internal Medicine, Hospital of Ceva, Cuneo, Italy;8. Internal Medicine, Hospital Pugliese-Ciaccio, Catanzaro, Italy;9. Internal Medicine, Azienda Ospedaliero-Universitaria “S. Anna”, Ferrara, Italy;10. QBGroup SpA, Padova, Italy;11. Department of Internal Medicine I, Arcispedale S. Maria Nuova, Reggio Emilia, Italy;12. Medical Department, “Civile” Hospital, Legnano, Italy;13. Department of Internal Medicine, Hospital “Maggiore della Carità”, Novara, Italy;1. The Ohio State University Wexner Medical Center, Department of Pharmacy Practice & Science, Columbus, OH, United States;2. University of Kentucky College of Pharmacy, Lexington, KY, United States |
| |
| Abstract: | The Close Proximity Index (CPX) measurement method is proposed in the ISO/DIS 11819-2:2011 and it aims to evaluate different road pavements with respect to their influence on traffic noise, under conditions when tyre/road noise dominates. In this paper, a modified CPX-based methodology is presented, in order to improve the usefulness of tyre/road noise measurement in the evaluation of acoustical performances of a road surface, in terms of both temporal and spatial stability and in terms of effectiveness of a mitigation action. In particular, the proposed methodology uses a finer spatial resolution and improves the speed-levels relationship knowledge. Moreover, data variability and uncertainty related to tyre/road noise measurement results are here investigated.This paper is conceived within LEOPOLDO project, developed in Tuscany with the aim to study the acoustical characteristics of six new experimental road surfaces, and the proposed methodology has been applied to some of them. The evaluation of the local possible acoustical inhomogeneities of test pavements and a three years long monitoring of the time evolution of their acoustical performances were required by the project. Finally, a new criterion is proposed to make more reliable comparisons (differential criterion) between different road surface types and to better evaluate the temporal evolution. |
| |
| Keywords: | CPX Acoustical absorption Tyre/road noise |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
