Now showing 1 - 5 of 5
  • Publication
    Audio noise mapping in virtual urban simulations : enhancing public awareness
    (Turkish Acoustical Association, 2007-08) ; ;
    One of the key difficulties with urban environmental noise mapping is disseminating results from noise studies in a manner that is easily understood by the general public. Indeed, it is one of the requirements of the Environmental Noise Directive (END) that information from noise studies is disseminated to the general public so that awareness of environmental noise issues is increased. This paper presents preliminary work undertaken to integrate results from environmental noise studies into a virtual sound environment. The model uses appropriate sound mixing techniques to integrate background sound from prediction software while direct sound is integrated from appropriate sound samples. In the virtual environment sound is output using audio rendering and clustering techniques which take account of the position of the individual in the virtual environment. The model demonstrates the possibility of using virtual urban simulations as a framework for evaluating the environmental and visual impact of major urban developments particularly in terms of the impact on the surrounding urban soundscape. In addition, the model framework may be used as a demonstration method whereby the sensitivity of the urban sound environment to different traffic management scenarios is presented to urban inhabitants.
  • Publication
    Environmental noise prediction, noise mapping and GIS integration : the case of inner Dublin, Ireland
    (East-European Acoustical Association, 2006-06) ; ;
    The recent Environmental Noise Directive (END) of the European Union (EU) requires that noise maps and action plans are compiled for agglomerations with a population greater than 250,000 individuals. This paper reports on research conducted to predict and map road transport noise for a study area in central Dublin. Noise emission levels were calculated for Lden and Lnight using the Harmonoise prediction method as recommended by the European Union. Emphasis was placed on integrating noise data with a Geographic Information System (GIS). The results demonstrate that using a GIS to integrate noise data with other available spatial data can enhance the accuracy and visualisation of noise maps. In this regard, 3D noise animation was undertaken with a view to increasing public awareness in relation to environmental road transport noise. The results suggest that GIS based noise mapping has the potential to be more effective at informing environmental policy decision-making, particularly in terms of the actions to be taken as a result of excessively high environmental noise levels. The research also demonstrates that noise maps are visually sensitive to different methods of data interpolation. This is something which has not been explored to any great extent in previous noise mapping studies.
  • Publication
    Estimating human exposure to transport noise in central Dublin, Ireland
    This paper reports on research conducted to determine estimates of the extent of environmental noise exposure from road transport on residents and workers in central Dublin, Ireland. The Harmonoise calculation method is used to calculate noise values for the study area while a Geographical Information System (GIS) is utilised as a platform upon which levels of noise exposure are estimated. Residential exposure is determined for Lden and Lnight while worker exposure is determined for Lden. In order to analyse the potential of traffic management as a noise abatement measure, traffic was redirected from the main residential areas to alternative road links and the revised exposure levels were determined. The results show that the extent of noise exposure in Dublin is considerable, and in relative terms, it is worse for the night-time period. In addition, the results suggest also that traffic management measures have the potential to lead to significant reductions in the level of noise exposure provided that careful consideration is given to the impact of traffic flows on residential populations.
      799Scopus© Citations 75
  • Publication
    Implementation of the EU environmental noise directive : lessons from the first phase of strategic noise mapping and action planning in Ireland
    The first phase of noise mapping and action planning in Ireland, in accordance with EU Directive 2002/49/EC, is now complete. In total this included one agglomeration, one airport and approximately 600 km of major roads outside the agglomeration. These noise maps describe the level of noise exposure of approximately 1.25 million people. The first phase of noise mapping was dealt with by five noise mapping bodies while 26 action planning authorities were involved in the development of the associated action plans. The second phase of noise mapping, due to be completed in 2012, sees a reduction in the defined thresholds describing the required agglomerations, roads and railways that have to be mapped. This will have a significant impact on the extent of mapping required. In Ireland this will result in an increased number of local authorities being required to develop strategic noise maps for their area along with the further development of associated action plans. It is appropriate at this point to review the work process and results from the first phase of noise mapping in Ireland in order to establish areas that could be improved, throughout the noise mapping project. In this paper a review of the implementation procedures focussing on (dominant) road traffic noise is presented. It is identified that more standardisation is needed and this could be achieved by the establishment of a national expert steering group.
      1789Scopus© Citations 51
  • Publication
    Evaluating the impact on noise levels of a ban on private cars in Dublin city centre, Ireland
    Dublin’s city centre is the primary destination in the Dublin region for shopping, employment and education. Public transport services in the area have experienced significant time delays throughout peak periods of the day due to severe traffic congestion. In an effort to alleviate traffic congestion and increase the efficiency of public transport in the area, a ‘bus gate’ was introduced to one particularly sensitive area in the city centre. The scheme restricts private vehicles from accessing the area during peak traffic hours. It was hoped that this scheme would result in significant journey time-savings for public transport users and would also result in reduced noise pollution in the city centre from the removal of through traffic. This paper aims to quantify the effect the ‘bus gate’ has had on noise levels in the area. Noise levels were monitored prior to and after the introduction of the scheme and the extent to which the scheme impacted on the noise levels was thus evaluated. The study also estimates the impact extending the ban would have on noise exposure levels in Dublin city centre.
      638Scopus© Citations 13