Research On Sound Insulation And Noise Reduction Technology Of Urban Road Traffic Noise

With social and economic rapidly growth and the process of urbanization movesforward, urban transport plays an increasingly important role in urban development andpeople’s lives. The development of urban transport brings our convenience, meanwhile,also generate a lot of environmental problems, the traffic noise is one of the city’s mainsource of pollutions.Therefore, effective solution to urban traffic noise, is of greatsignificance to reduce urban noise pollution, the establishment of harmonious urbanenvironment and to safeguard the public physical and mental health. Facts have provedthat the sound barrier was one of engineering processors to control the urban road trafficnoise effectively and economically. Research and simulation of sound barriersystematacially has a certain value of reducing sound barrier noise and improving soundquality of the environment along the urban road.In this paper,on the basis of road traffic noise survey of Chongqing, first analysis ofthe characteristics of the urban road traffic noise, including the definition of urban noise,the main components and influencing factors, the time domain and frequency domaincharacteristics,ect.Then to introduce the noise reduction principle of noise barriers indetail, emphasis on research into determining the influencing factors of insertion loss,through actual monitoring of a sound barrier on Yuao Avenue somewhere, to draw thetheoretical calculation of the insertion loss and the actual value exists obvious gaps,after investigation and analysis to identify the main reason for actual sound barrier noisereduction effect not meet the design requirements, and propose solutions.Finallyresearch the sound barrier acoustic design main process systematically,in order tofurther analyze the sound barrier acoustic design process,based on the survey analysis oftraffic noise somewhere along the residential buildings in Yuao avenue, according to themain steps of the noise barrier acoustical design, preliminary design of three soundinsulation reflective barriers with different tops which in accordance with noisereduction requirements in this region. And adopting acoustic software of Virtual.LabAcoustic to simulation of the noise performance of the three sound barriers, the resultsshow that the design of the vertical sound barrier is most meet practical noise reductionrequirements, which has a good noise reduction effect.The conclusions of this article provide some basis and references for the analysis ofurban road traffic noise, noise barrier acoustical design and computer simulation studies.