ABSTRACT
As is well known, pavement features affect traffic noise. In more detail, rolling noise depends on generation factors and acoustic absorption. This latter can be assessed through in-lab (ISO 10534-2) and/or on-site (ISO 13472-1; ISO 13472-2) tests but several issues arise when comparing measures carried out according to different measurement methods. Consequently, the objectives and scope of the study described into this paper were to compare different methods in order to derive relationships to use in practical applications. The following devices were used: in-lab Kundt tube; on-site Kundt tube; Adrienne device. Based on measurements, absorption spectra were derived. Analyses and results focused also on composite indicators and first-pick frequencies and values. Outcomes can benefit both practitioners and researchers. Future research will address a number of issues arouse during experiments and analyses and will address a better understanding of phenomena and reasons which originated the relationships which emerged from the study.
