Noise pollution is one of the most important problems in big cities that endangers human health in different vital and materials distances. These research goals are assessment of temporal and locality changes of noise pollution in centeral parts of Isfahan and producing interpolation Noise map in these areas, in this study, 10 station in residential, comerical, residential- comerical and historical- recreational areas were selected and noise parameters were measured in 2 times of a day (10 o’clock and 17 o’clock) during 3 season of winter, spring and summer with Bruel and Kjaer 2239. The highest a mount of noise pollution were obtained in the station that was located in Abdolrazagh street about 76.5 dB and the lowest amount were obtained in Hashtbehesht Park about 54.5 dB. In this research the highest amount of noise pollution was belong to residential-comerical areas with equivalent level about 71.6 dB. In majority of stations morning equivalent level’s were more than afternoon. In comerical and residential- comerical areas the significant leq diffrance were obtained between winter’s morning and afternoon and in historical – recrentional area it was obtained between summer’s morning and afternoons. In these areas these significant diffrances were obtained between all 3 seasons morning and also in winter and summer’s afternoons, in comerical areas this significant equivalent level diffrances were obtained in summers and winter’s morning. Correlation test showed the effects of buses and motorsycels in producing noise pollution in residential areas and cars in comerical and residential-comerical areas. Another correlation test showed that the good plant covering is usefull for reducing the noise pollutions. Noise interpolation maps were produced and these maps showed that noise pollution in winter is less than summer and spring in all areas. In this way in 3 station( Ahmad abad square, Naghshjahan square and Abdolrazagh streat ) measurements in 3 days of a week(Saturday, thusday and Friday) and in different times of a day, during these seasons were done, these results showed that significant equivalent level differences in Ahmadabad square and abdolrazagh square were obtained in all 3 seasons but in Naghshejahan square they only exist in winter, furthermore in different sites of Hashtbehesht Park , noise pollution’s changes were evaluated , the results showed that different sites in this parks that were located in different distances of main streat and had different plants covering had different amount of noise pollution, the highest amount of leq was belong to the site near the chaharbagh streat with 68.8 dB and the lowest amount of leq was belong to the site in the middle of the park with amount of leq about 61.3 db, totally the results showed that in all station leq is upper than limitted amount of leq that were determined by Iran environmental organization and noise pollution is one of the environmental problems in centeral parts of Isfahan. Key words:noise pollution, Isfahan,Equivalent level, noise interpolation maps