Paje S E, Bueno M, Terán F, Viñuela U, Luong J
Laboratory of Acoustics Applied to Civil Engineering (LA2IC), Department of Applied Physics-ETSI Caminos and ES Informática, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain.
J Acoust Soc Am. 2008 Mar;123(3):1439-45. doi: 10.1121/1.2828068.
Geo-referenced close proximity rolling noise and sound absorption measurements are used for acoustical characterization of asphalt concrete surfaces in an urban environment. A close proximity noise map of streets with low speed limits is presented for a reference speed of 50 km/h. Different pavements and pavement conditions, common in urban streets, are analyzed: dense and semidense asphalt concrete, with Spanish denomination D-8 and S-12, respectively, and on the other hand, dense pavement at the end of its service life (D-8(*)). From the acoustics point of view, the most favorable surface, by more than 4 dB(A) compared with the S-12 mix, is the smoothest surface, i.e., the D-8 mix, even though it presents a minor absorption coefficient in normal incidence. Noise levels from dense surfaces (D-8) increase significantly over time, principally due to the appearance of surface defects such as cracks and ruts. Longitudinal variability of the close proximity tire/pavement noise emission and surface homogeneity are also analyzed.
地理参考近距离滚动噪声和声吸收测量用于城市环境中沥青混凝土路面的声学特性表征。给出了低速限制街道的近距离噪声地图，参考速度为50公里/小时。分析了城市街道中常见的不同路面和路面状况：分别为密实和半密实沥青混凝土，西班牙名称分别为D-8和S-12，另一方面，还有使用寿命末期的密实路面（D-8(*)）。从声学角度来看，与S-12混合料相比，最有利的表面比其更平滑，即D-8混合料，比其高出4分贝(A)以上，尽管它在垂直入射时的吸收系数较小。密实表面（D-8）的噪声水平会随着时间显著增加，主要是由于表面缺陷如裂缝和车辙的出现。还分析了近距离轮胎/路面噪声排放的纵向变异性和表面均匀性。
