Abstract
Current literature on the performance characteristics of road surfaces is primarily focused on evenness, roughness and technical durability. However, other important surface properties require analysis, including noisiness, which is an important feature of the environmental impact of vehicular traffic around roads. This can be studied using various methods by which road noise phenomena are investigated. The method used to measure the noise performance of road surfaces herein is the Statistical Pass-By (SPB) method, as described in ISO 11819-1:1997. The impedance tube method was used for sound absorption testing, as described in ISO 13472-2:2010. These tests were performed under a variety of conditions: in situ and in laboratory. The existence of relationships between them can be helpful in selecting surfaces for noise reduction. Preliminary surface noise tests can be performed in the laboratory with samples consisting of various compounds. This is less expensive and faster than doing so on purpose-built surfaces. The paper presents study results for sound absorption coefficients of various types of low-noise surfaces in in situ conditions (on an experimental section and on operated road sections) and in the laboratory setting. The results of the tests performed on the operational sections were compared to the results of the surface impact on road noise using the SPB method. The correlations between the test results help confirm the feasibility of road surface pre-testing in the laboratory and the relation to tests performed using the SPB method under typical operating conditions.
Highlights
Road noise is one of the most frustrating environmental phenomena for people
Silesian Voivodeship in southern Poland were selected: First, sound absorption coefficient tests were performed under in situ conditions for the seven road surfaces used on the test section in Bolimów
Sound absorption coefficient tests were performed under in situ conditions for the seven road surfaces used on the test section in Bolimów
Summary
Road noise is one of the most frustrating environmental phenomena for people. It has a significant effect on the health of people living in the immediate vicinity of roads [1].It can be reduced in various ways: in the sound emission zone (e.g., road surfaces), in the propagation zone (e.g., noise barriers) and at the recipient level (e.g., acoustic insulation of windows) [2,3]. Road noise is one of the most frustrating environmental phenomena for people It has a significant effect on the health of people living in the immediate vicinity of roads [1]. Limiting the noise generated in the sound emission zone by using quiet surfaces is often the best solution, allowing for measurable results [4,5,6]. It requires knowledge of the phenomena occurring at the interface between the vehicle wheels and the road surface as well as how to study them. Both of these are related to what is known as tire/road noise
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