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Traffic Noise Models for Curved Roads

Popescu D. I., Cosma I.

Archives of Acoustics

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2016

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Vol. 41, No. 2

309--314

EN

The paper presents two theoretical models for traffic noise level distribution on curved horizontal roads. In the case of vehicles moving on a given route, one can consider, in terms of sound field, that the granular traffic is equivalent for short periods with a quasi-continuous noise flow. When computing and modelling the noise level generated by traffic on roads with complex trajectory, it is common to treat the route as a sum of small length road segments, each being assimilated with a linear noise source. This paper started from the assumption that the route can be decomposed into a sequence of linear and arc-shaped road segments, each of which is treated as a linear respectively curved noise source. An arc-shaped road segment is modelled by a tubular vibrating surface, of circular or rectangular section. In the case of rectangular section, the vibrating blade emits complex sounds on its both vertical sides and the generated sound field can be described more clearly, qualitatively and quantitatively, through intensity distribution. The theoretical models presented in the paper have direct application to the traffic noise prediction and noise maps drawing.

2

Urban Noise Annoyance Between 2001 and 2013 : Study in a Romanian City

Popescu D. I., Moholea I. F., Morariu-Gligor R. M.

Archives of Acoustics

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2013

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Vol. 38, No. 2

205--210

EN

The paper presents results of three socio-acoustic surveys conducted in an interval of twelve years, between 2001 and 2013, in a large Romanian city, Cluj-Napoca. The purpose of the surveys was to assess the awareness of residents on urban noise and the extent to which the noise environment affects their everyday life, behavior and health. The surveys were conducted in 2001, 2009 and 2013. The questionnaire used in the first survey had 16 questions and it was verified prior to study through a pilot survey, being corrected and improved. For the second and the third study, the questionnaire was enriched with eight more questions, regarding essentially the description of the residential area, criteria for its selection and also awareness about the noise map of the city. The analysis of responses defines the main characteristics of the local pattern of annoyance and reaction of the urban population to the environmental noise.

3

Monitoring the Reaction and Response of People to Urban Noise

Popescu D. I., Moholea I. F.

Archives of Acoustics

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2010

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Vol. 35, No. 2

237-244

EN

An important aspect in assessing noise in urban agglomerations is the subjective one, which takes into account the sensitivity and specific reactions of residents to the noise in their living environment. This paper presents results of a sociological study initiated to determine the population awareness, regarding the urban acoustic environment and estimation of effects and disturbance. The survey was conducted in a Romanian city, to complement the information provided by the strategic noise map of the area. This approach allows the estimation of specific local patterns of reaction and response to urban noise of the exposed population and provides the information, needed to develop action plans and to set proper solutions for urban area planning.

4

Noise mapping in Romania within the framework of EU directive 2002/49/EC

Popescu D. I.

Archives of Acoustics

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2007

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Vol. 32, No. 2

329-337

EN

The demand for environmental noise information in Romania will increase in the near future, first of all due to the integration of the country in the European Union. Some of the European Commission noise directives have already been transposed in Romanian legislation. According with this new legislation, Romania - like the EU countries - has to provide noise maps and also to prepare noise action plans with measures to reduce noise levels when limits are exceeded. The purpose is the definition of a common approach intended to avoid, prevent or reduce the harmful effects of the environmental noise. The paper aims to present the Romanian first experience on noise mapping, during the year 2006, by respecting the requirements of European Directive 2002/49/EC. The general context is described and also specific methods for a practical case study are discussed.