Study Of Sound Preferences In Undergraound Shopping Spaces

With the rapid economic development and the increasing scale of urban construction, the conflict between urban development and shortage of land becomes more and more prominent, and development of underground space will be an important way to the urban sustainable development and the elevation of urban function. On the other hand, with the improvement of living standards, environmental issues are attracting much attention, and sound environment as part of the environment is also increasingly important. The two reasons above contributed to this research. Commercial spaces, one kind of the common underground spaces, was chosen as the research carrier in the work, whose sound fields, sound sources, soundscapes and sound preferences were studied, although the research was focused on the sound preferences of the underground shopping spaces. In other words, the study of the sound fields, sound sources, and soundscapes was all carried out around the focus of sound preferences.With a given sound, the sound preference would be different in different sound fields. In the study of the sound fields of underground space, two underground spaces, an underground corridor at Harbin Institute of Technology (similar to underground shopping spaces) and the underground mall of the Stone Street in Harbin, which have the similar spatial patterns and totally different functions, were selected to carry out sound fields testing in the study, including sound pressure level distribution and reverberation time. The results of the tests show that the sound field characteristics of underground spaces are influenced by the shapes of space more than the functions. For the common "---" type of space plan of the underground shopping space, compared to classic acoustic theory, the acoustic theory of the long spaces is more reliable, as a design tool.Clearly a systematic study of sound sources is essential for the study of sound preference. In order to understand common source types of the underground shopping space, two representative spaces, Hongbo Underground Shopping Mall Square of Harbin and the Jinjie Underground Mall were selected in this study, and the sound sources of such underground shopping spaces in Harbin were investigated by the means of on-site questionnaire surveys. The survey results showed that although the sound sources of the two selected underground shopping spaces were different, common sound sources were relatively fixed. On the other hand, in order to compare the types of sound sources of different underground shopping spaces under different cultural backgrounds, the basement of Italie2, which is a famous large business centre Paris, was also surveyed in this study. The results indicate that, in terms of sound source types, although they are different because of the different functions of the underground shopping spaces, the sound source categories in underground shopping space are relatively fixed. In terms of the dominant sounds, the dominant sounds in the underground shopping spaces in Paris and in China are very different, and the causes are analysed in this work.Sound preference also happens in the context of a soundscape, so after the systematic research of the sound fields and acoustic sources of the underground shopping spaces, the soundscapes of the underground shopping spaces were surveyed through the use of on-site questionnaires. Based on the statistical survey of a large number of questionnaire samples, the soundscape evaluation of the underground shopping spaces were analysed in the aspects of social / demographic factors, physical environmental factors and other factors, obtaining physical environmental factors and social/demographic factors that influence the underground shopping spaces, in order to provide the evidences for improving the sound environment of the underground shopping space and the basis for in-depth and follow-up study of sound preferences.Based on the research of the sound fields, sound sources and sound preferences of underground shopping spaces, the sound preferences of underground shopping spaces were studied deeply in the work. The sound preferences of the underground shopping spaces are divided into three parts: the basic research of the sound preferences of the underground shopping spaces, the research of the common sound preferences of the underground shopping spaces and the research of the dominant sound preferences of the underground shopping spaces. In order to make the study of sound preferences of underground shopping spaces more scientific and make the evaluation more objective and accurate, this work introduces the semantic differential analysis in the field of linguistics. The introduction of semantic differential analysis makes it possible to do the quantitative analysis and qualitative analysis of the sound preferences of the underground shopping spaces. According to the principle of semantic shopping analysis, appropriate adjectives were selected to design a questionnaire, which was carried out in the field survey. On this basis, fundamental issues of sound preferences of the underground shopping spaces were studied at first, and the social / demographic factors and physical environmental factors which influence the sound preferences of the underground shopping spaces were examined. After that, in order to study characterises of sound preferences in underground shopping streets, the sound preference evaluation of common sound sources were examined. Both sound preference evaluation and noisiness evaluation were considered and their correlations have been calculated. In the analysis, some design strategies based on the sound preferences have also been discussed, although this is not the focus of this thesis。After systematically examined the sound preferences of common sound sources in underground shopping spaces, based on the method of semantic differential analysis, this work systematically examined the effects of dominant sounds in underground shopping spaces. This included four groups of word pairs,for satisfaction, strength, fluctuation and social/other aspects. The aim is to understand people's sound preference for dominant sounds, in a quantitative way. Moreover, through the semantic differential analysis of the dominant sounds by considering a large number of word pairs, the importance and usefulness of different word pairs have been discussed and this would be useful for the study of underground shopping spaces in the future.