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Session Overview
Session
I-INCE Lecture: Paul Donavan
Time:
Wednesday, 30/Aug/2017:
15:20 - 16:20

Session Chair: Rajendra Singh
Location: Convention Hall A & B
Convention Hall A & B, Level 1, HKCEC
Trend of Automobile Development and Its Challenge for Noise and Vibration Control

Session Abstract

As early as the 1970’s , researchers were attempting to understand and reduce tire-pavement noise with the emphasis on the tire. By the late 1990’s, interest began to turn to reducing traffic noise through quieter pavement. This was driven largely by research in Europe and Asia and some early pilot studies in the US that demonstrated dramatic reductions in roadside noise levels. No small part of this interest was fueled by publication of the definitive text, Tyre/Road Noise Reference Book by Ulf Sandberg and Jerzy Ejsmont. Also in this time period, methods of quantifying tire-pavement noise on-board, at the source were being developed and standardized. In the U.S., this took the form of on-board sound intensity (OBSI) measurement originally developed in the 1980’s for tire-pavement noise research. With this technique and pass-by noise confirmation, a number of acoustic longevity studies of quieter pavement were undertaken for asphalt and portland cement concrete (PCC). As prognosticated, it was found that the ability of a pavement to reduce noise declined over time but with different rates depending on the pavement. With the quantification of these effects, it has been possible to develop a methodology for reducing the cost of noise abatement through the intelligent use of quieter pavement often in conjunction with noise barriers. Of the asphalt pavements studied, porous surfaces show the most promise as they cannot only reduce the strength of the source, but also attenuate sound propagating over it. For PCC, the noise is all about texture, and ground surfaces typically perform the best. Beyond just pavement, various discontinuities such as joints also influence the pavement performance. This paper summarily covers topics in what makes a pavement quieter, major acoustic longevity studies, and the effect of joints, PCC texture, and pavement porosity on noise performance.


No contributions were assigned to this session.


 
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