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    ANALYTICAL NOISE CONTOUR CONSTRUCTION USING INVERSE SQUARE LAW OF SOUND PROPAGATION
    (GH ASACHI TECHNICAL UNIV IASI, 2008) Celik, Cahit Tagi; Guremen, Lale
    One of the most important environmental problems is traffic noise in urban areas. In order to assess and monitor its influence on environmental quality, road traffic noise measurements are necessary. In generation of noise contour map, two main problems are encountered: noise measurements, which take considerable amount of time, and the method for rigorous production of noise contour map. An extrapolation technique was developed to construct noise contours using actual sound level measurements and GPS coordinates in connection with GIS. This technique was applied to the road traffic noise level measurements performed at 61 stations on the main roads and roundabouts of Nigde city of Turkey in 5.5 km(2) area having approximately 100,000 inhabitants. Production of reliable noise contour map of Nigde was presented by using developed extrapolation technique, which utilize inverse square law of sound propagation.