Laboratorio de Acústica (Lambda), Departamento de Física Aplicada, Instituto Universitario de Investigación para El Desarrollo Territorial Sostenible (INTERRA), Escuela Politécnica, Universidad de Extremadura, Avda. de La Universidad, S/n, 10003 Cáceres, Spain.
Laboratorio de Acústica (Lambda), Departamento de Física Aplicada, Instituto Universitario de Investigación para El Desarrollo Territorial Sostenible (INTERRA), Escuela Politécnica, Universidad de Extremadura, Avda. de La Universidad, S/n, 10003 Cáceres, Spain.
Environ Pollut. 2022 Sep 15;309:119761. doi: 10.1016/j.envpol.2022.119761. Epub 2022 Jul 11.
The effect of road traffic noise in urban environments is an issue of social and scientific interest, due to its public health and economic impacts. Scientific literature showed a decrease in the level of tyre/road noise generated as temperature increases, but usually under standardised traffic conditions in non-urban environments. Based on a wide network for the hourly monitoring of road traffic flow, air temperature and noise levels across the city of Madrid (Spain), this work proposes and applies a new experimental methodology for studying the dependence of urban road traffic noise on temperature. This study was conducted under real-world traffic conditions involving a wide variability in urban configurations and in the type and state of preservation of vehicles, tires and pavements. From the analysis of data for a whole year, a time interval was identified (from Tuesday to Thursday and between 8 a.m. and 8 p.m.) in which the variability in road traffic flow for the whole city of Madrid was stable enough to allow for a linear regression study between temperature and noise levels from urban road traffic. The relationships found were highly significant (p ≤ 0.001) for data from all the noise monitoring stations, with values of higher than 20% and up to 42% for the explanation of the variability in the measured noise levels by temperature at most of the measurement points. The values of the slope coefficients at the noise monitoring stations ranged from -0.036 to -0.125 dB/°C, with an average value of -0.090 ± 0.011 dB/°C. These results are within the range of values reported in the scientific literature for experimental tests conducted under conditions of controlled or free-flowing traffic.
城市环境中的道路交通噪声的影响是一个社会和科学关注的问题，因为它对公共健康和经济都有影响。科学文献表明，随着温度的升高，轮胎/道路噪声的水平会降低，但通常是在非城市环境中的标准交通条件下。基于马德里市（西班牙）的道路交通流量、空气温度和噪声水平的每小时监测的广泛网络，这项工作提出并应用了一种新的实验方法来研究城市道路交通噪声对温度的依赖关系。这项研究是在涉及到城市结构和车辆、轮胎和路面的类型和状况的广泛变化的真实交通条件下进行的。从一整年的数据分析中，确定了一个时间间隔（从星期二到星期四，上午 8 点到晚上 8 点），在这个时间间隔内，整个马德里市的道路交通流量变化足够稳定，可以进行温度和城市道路交通噪声水平之间的线性回归研究。从所有噪声监测站的数据中发现的关系具有高度显著性（p ≤ 0.001），对于大多数测量点，温度对测量噪声水平的可变性的解释率高达 20%以上，最高可达 42%。噪声监测站的斜率系数值范围从-0.036 到-0.125 dB/°C，平均值为-0.090 ± 0.011 dB/°C。这些结果在科学文献中报道的实验测试条件下的受控或自由流动交通条件下的实验测试值范围内。
