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19th INTERNATIONAL CONGRESS ON ACOUSTICS MADRID, 2-7 SEPTEMBER 2007 ANNOYANCE BY COMBINED EXPOSURE TO NOISE FROM ROAD TRAFFIC AND RAIL TRAFFIC DISCUSSED IN THE FRAMEWORK OF THE NOTICING MODEL
| Content Provider | Semantic Scholar |
|---|---|
| Author | Botteldooren, Dick Dekoninck, Luc Greve, Bram De Coensel, Bert De Lercher, Peter |
| Copyright Year | 2007 |
| Abstract | The effect of combined exposure to noise from different sources is a multifaceted problem. It has previously been explained using a two step model. The first step consists in quantifying the effect of noise from one source in the presence of noise from the other source. The second step is overall assessment of ones exposure situation. The latter part of the problem has been explained quite well while the first part seems to be less understood. In this paper we gathered a number of annoyance survey data and the results of a field experiment and discuss observations in the light of the noticing model that we have developed over the past couple of years. In this model noticing a noise during everyday activities is a critical condition for annoyance to occur. Noticing of intermittent sources such as railway noise is governed mainly by the peak level of the sound while noticing more continuous sound depends on momentaneous attention. Combined exposure both leads to adaptation and habituation at one hand and to focussing triggered by the other source at the other hand. The proposed model predicts some of the trends in the data. INTRODUCTION The effect of combined exposure to several sources of noise has been a focus of interest for many years. Early research [1-2] in this area already distinguished between the influence of the presence of a second source on the perceived annoyance caused by the first one at one hand and an overall assessment of noise annoyance on the other. Studies on the latter effect have been quite conclusive in their finding: providing that the overall annoyance question is posed prior to discussing categories of possible noise sources, the strongest component model predicts reported overall annoyance quite well. In [3] we gave an overview of existing models and propose a cognitive model that explains the answers obtained in questionnaire surveys. Understanding the influence of the presence of a second noise source on annoyance caused by a first one, is much more complicated. Earlier work [4] showed that noise sensitivity of people living close to highways was lower and thus annoyance caused by other forms of sound such as railway noise was less in these areas compared to the average situation. Lower sensitivity was thought to be mainly caused by migration of less sensitive people into the area. The acoustical factor nevertheless plays a significant role. It should allow distinguishing between sources. In [5] a very simple model is proposed that consists in adding equivalent noise levels that cause the same amount of annoyance. Several variants on this theme were proposed but they all have in common that they are based on an equivalent noise level as a primary indicator. In this paper we study annoyance caused by combined exposure to road and rail traffic noise within the framework of the notice-event model for noise annoyance that was previously proposed [6-7]. It was shown that this model could explain much of the difference in annoyance between highway traffic noise exposure and railway traffic noise exposure that is commonly observed in questionnaire surveys and field experiments. A SUMMARY OF OBSERVATIONS Before considering the effect of cumulative exposure, the inaccuracy in trying to explain railway noise annoyance as a function of equivalent sound level (or Lden) has to be recognised. In |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://users.ugent.be/~bdcoense/assets/pdf/C1/16_BotteldoorenICA07b.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
