01090278

Component

This paper outlines an investigation of the influence of variations in air temperature on near-field pavement-tire noise measurements. Forty-six hot-mix asphalt (HMA) sections at the National Center for Asphalt Technology (NCAT) test track were repeatedly tested at four different times during a warm day with air temperatures ranging from 50°F – 86°F. Near-field tire-pavement noise measurements were taken using the NCAT close-proximity (CPX) trailer with the Michelin standard reference test tire (SRTT) at a speed of 45 mph. The HMA mixtures evaluated included dense-graded Superpave, open-graded friction course (OGFC) and stone matrix asphalt (SMA). Based on a statistical analysis of variance (ANOVA) it was concluded that sound pressure measurements on all of the HMA surfaces tested were relatively insensitive to changes in air temperature. This finding suggests that, for practical applications, no temperature correction need be applied to sound pressure measurements. Temperature correction equations as a function of frequency are provided based on sound pressure measurements of the sections at the track for more accurate assessments of tire-pavement noise. It was found that relating sound pressure levels to sound wavelength calculated from estimated wave speeds allows a better characterization of the near-field tire-pavement noise temperature-frequency dependency.

01084478

08-0389

English

2008

Transportation Research Board 87th Annual Meeting

DVD

Figures (8) ; References (17) ; Tables (2)

Atmospheric temperature; Friction course; Hot mix asphalt; Near field; Open graded aggregates; Pavement management systems; Paving materials; Stone matrix asphalt; Tire/pavement noise; Traffic noise

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2008 Paper #08-0389

TRIS, TRB

Jan 29 2008 2:45PM