Field study on the influence of spatial and environmental characteristics on the evaluation of subjective loudness and acoustic comfort in underground shopping streets

摘要

A large-scale measurement and subjective survey was undertaken in five undergroundudshopping streets to determine the influence of spatial and environmental characteristics onudusers’ subjective loudness and acoustic comfort. The analysis on the spatial characteristicsudshows that the subjective loudness is higher in “street type” than in “square type”udunderground shopping streets when the equivalent continuous A-weighted sound pressureudlevel (LAeq) is relatively high (75 dBA). Acoustic comfort is higher in “square type” than inud“street type” underground shopping streets where LAeq is relatively low (55 dBA).udConsidering spatial functions, it is found that acoustic comfort is higher in a dining area thanudin a shopping area. In terms of environmental characteristics where air temperature, relativeudhumidity, luminance and visual aspect were considered, the subjective loudness is influencedudby humidity and luminance, with correlation coefficients of 0.10 to 0.30. The evaluation ofudacoustic comfort is influenced by air temperature, humidity, and luminance, with correlationudcoefficients of 0.1 to 0.4. There are significant correlations between the evaluation ofudenvironmental factors and subjective loudness, as well as, acoustic comfort. The correlationudcoefficients are 0.1 to 0.5. Moreover, respondents’ attitude to sound environment couldudinfluence their evaluation of subjective loudness and acoustic comfort.