Research On Perception And Optimization Of Soundscape In Commercial Streets

With the development of urban construction,urban commercial space became a very important part of city planning and design.The sound environment of urban commercial space became a hotspot of researches on urban sound environment.So far,the design of urban sound environment is still in the exploring stage and mostly involves field investigations and physical measurement whose results make soundscape design in a relatively negative situation.The conclusion of those researches could barely be applied into the process of building design and city planning directly.In addition,the objective of those researches focus on acoustical indicators rather than sound resource composition.This study firstly chose five representative commercial streets in urban areas of Tianjin,and carried on a field investigation on sound resource composition and acoustical parameters of those streets,at weekdays and weekends respectively.At the same time,some pedestrians were interviewed randomly about their subjective perception about sound environment of those commercial streets.And then,this study found out the features of sound resource composition and physical parameters of those commercial streets and the correlation between those features and subjective perception of interviewees.The result showed that sound resource composition and physical parameters had a significant influence on subjective evaluation of soundscape in commercial streets.Secondly,this study did further research on how in detail sound resource composition and sound pressure level indicators influence the subjective evaluation of sound environment in commercial streets separately based on previous investigation,in order to make suggestions on improvement of sound environment in commercial streets.As for sound resource composition,this work was done through subjective evaluation experiments,and the result indicated that different types of sound resources had a significant influence on the subjective evaluation under different levels of sound pressure and noise-signal ratios.In terms of sound pressure level indicators,computer simulation technology was used to find out the answer,which was various space scale factors of commercial streets and interfacial parameters of building facades on both sides of commercial streets had a significant influence on the level and distribution of sound pressure in the sound environment in commercial streets.In the end,this study summarized the results above and offered some trains of thought and clues that could be referenced in the process of soundscape design in commercial streets.