From Sep 18 2005 to May 31 2007, this project has been implemented and the scheduled progress has been achieved.The following is the brief presentation of primary achievements: First, the latest applicable specifications and codes widely used in EU and the information regarding the making of urban noise maps that have been carried out in EU countries were collected for data summarization. The status of implementation in these countries is presented here in terms of the difficulties during the implementation, features of the implementation and its advantages and drawbacks as well for the reference of EPA and fellow environmental protection agencies in future operations. Secondly, the noise sources and their parameters and relevant data that are required for the analysis and production of noise maps were reviewed with the reference of the guidelines of EU for noise map production to carry out data collection for subsequent feasibility analysis. Also, the methods of data conversion for major factors of influence, such as road noises, buildings, and noise measurement, are provided. Next, a practical noise map making and planning was carried out at a small area. In this project, a simulation urban noise map was carried out on an area of 25km2 in Taipei City. The simulation software LIMA was introduced in the urban noise map simulation based on 6 scenarios, including freeways, expressways, major roads, general roads, all roads and city blocks with buildings. Moreover, the simulation has incorporated variety of parameters, for example, daytime noise level(Ld), evening noise level(Le), nighttime noise level (Ln),all day equivalent continuous sound level(Leq)and day-evening-night noise level (Lden), and GIS was employed for graphic data processing. The results were summarized and posted on EPA website for the reference of local administrations. For the results of simulation executed in this project, the result of simulation on smaller area of 1km2 was added for larger areas and Taipei City to estimate the simulation schedule and costs needed for the implementation of noise maps. So far two noise counseling meetings have been held to present the achievement of this project, and in the meetings the relevant specifications and codes of EU regarding noise map making were introduced for exchanges of experience and suggestion and for the reference of EPA and fellow environmental agencies. Also, another conference of noise operation reviews and achievement discussion was held for the simulation results of this project.

Noise Map , noise simulation , EU Environment Noise Directive