Environmental Noise Monitor And Appraisal Of Yang Ling

Along with our country's social economy rapid development and the urbanization advancement, each kind of city ambient noise pollution day by day becomes increasingly serious. The country has already carried on the comprehensive general survey and the monitoring to some big or media-sized cities ambient noise, but in some small and medium-sized towns and cities, because of many kinds of restrictions, this kind of work progress slow down. It is sure that along with people living standard improvement, the people can enhance unceasingly to the sound environment request, it is imperative to strengthen the monitor and the control of small and medium-sized town and city ambient noise pollution. Yang ling as the newly-developing small and medium-sized town and cities, the sci-tech and educational personnel approximately composes the entire area urban population 63%; this kind of population constitution sets a higher request to the district sound environment. This experiment embarks from the urban environment noise, carrying on the monitor and the appraisal of the region ambient noise to Yang Ling, and has analyzed the reason of Yang Ling the ambient noise pollution, the present situation and the characteristic, combining many kinds of appraisal target to carry on the appraisal to the noise level, and proposed the corresponding noise reduction measure, in order to provide the scientific basis. the scientific base for the improvement of Yang ling's sound environment.According to the national corresponding noise standard, monitoring, appraising and analyzing the region ambient noise overall present situation of Yang Ling, the findings had indicated that:(1)Noise source overall present situation: the noise source of old urban area mainly comes from the daily life and the traffic, especially the whistle and brake of the traffic. in which vehicles blows a whistle with the braking sound interference people is frequent; new urban area accidental noise exceeding the allowed figure is big, including commercial propaganda sound, emergency brake sound, large-scale loading truck sound and building construction noise and so on; The village in the city the village transportation path passes through the region traffic noise pollution to be serious, simultaneously has the social life noise.Transportation path passes through the region traffic noise pollution to be serious, simultaneously has the social life noise.(2)Region ambient noise aggregate level: Yang Ling the corresponding noise target, and respectively is 53.6dB, 4.5dB, 45.6dB, 50.4dB, 55.0dB.According to the pollution fractional exponent, the sound environment condition of Yang Ling is so-so.(3)0 # areas have the overproofed phenomenon in the day and at night, exceeding the allowed figure rate respectively are 10.4% and 2.2%, mainly is cause by the frequent way this region delivery building material machine shop truck. But in this area countryside villa the inhabitant are very few, but the Shui Mingyuan recuperates center is constructing, therefore the noise influence is not big. The enhancement truck management of this region can improve this region the sound environment.(4)1 #area sound environment is generally good, because but faces the street the building to be obvious the traffic noise influence, exceeding the allowed figure is serious. Simultaneously constructs construction noises and so on the construction and house decoration also has the disturbance to 1 # area. In isolates on the stockade and the isolation wall plants the hedgerow, and the strict control construction time, improves the house decoration worker's environmental protection quality, is reduces this 1 kind of area noise the effective method.(5)2 # area day average equivalent acoustic level, exceeds the allowed figure 1.6dB, exceeding the allowed figure rate is 2.7%; the average equivalent acoustic level, at night the sound environment is good at night. The social life noise occupies the monitor grid number in the day the proportion to be biggest, is 54.3%.(6)4 # areas are the transportation main road both sides of the region, 10 transportation main roads of Yang Ling in the appraisal time interval the day (6:00 ~ 22:00) the average equivalent A acoustic level are 68.2dB, compared to national standards stipulation 70dB (A) low 2.6%, but the noise fluctuates in a big way, is intense to the transportation yang or male principle both sides inhabitant instant disturbance. Xi Nong Road traffic flow magnitude is highest, the traffic noise pollution is serious, exceeds the allowed figure 0.7dB(A).West the agricultural road and the Tai city road traffic flow magnitude and the traffic noise day change peak value appears in on, gets off work the time interval; The Wei Hui Road traffic flow magnitude and the traffic noise day fluctuation is not big, with on, gets off work the time interval to relate not obviously, conforms to the passenger transportation or main principle transportation characteristic. In the Wei Hui Road noise spectrum analysis, the low frequency area noise pollution is serious.The primary factor influenced the area traffic noise is: Traffic flow magnitude, vehicles constitution and type, vehicles traveling condition, vehicles performance, municipal transportation management and path construction and so on. Moreover, pedestrian traffic rule consciousness is light; in order to evade the pedestrian, blow a whistle. The phenomenon is to be serious, and this also is a traffic noise indirect factor. If can the area develops the traffic regulations propaganda and the learning activity in Yang Ling, perhaps can fundamentally cease or slows down the vehicles blowing a whistle, subsequently reduces the traffic noise.(7)In brief, besides the transportation skeleton line, 3 kind of function areas ambient noise exceeding the allowed figure situation from high to low in turn is: 0 kind of standards are suitable an area >1 kind of standard to be suitable an area >2 kind of standard to be suitable the area.