Parametric Influence on the Sound Absorption Coefficient of Porous Asphalt

Abstract

This research intends to develop a method for predicting the sound absorption coefficient of various porous highway pavement materials. Since many of the existing prediction models for acoustic properties and traffic noise still have limitations and problems with accuracy, sound absorption coefficients are measured with the impedance tube method to verify numerical values obtained from the model. Results obtained from the experiment and numerical simulations are compared and presented to reveal the effect and influence of the control parameters.

State-of-the-Art Review on Sustainable Design and Construction of Quieter Pavements—Part 2: Factors Affecting Tire-Pavement Noise and Prediction Models

“…It was found that the average sound absorption coefficients for asphalt pavements were 39.13 percent lower (more absorptive) than the ones measured on concrete surfaces. Sachakamol and Dai [87] developed an analytical procedure for predicting the sound absorption coefficients of porous asphalt pavement. The researchers concluded that the porosity has significant influence on the absorption coefficients, while the layer thickness has an insignificant impact on the absorption coefficients.…”