Previous research indicates that restorativeness of urban parks is correlated with the sound quality, while different sound sources would contribute to the judgment of sound quality and influence mental restoration correspondingly. Therefore, further relationships between the occurrences of different sounds and restorativeness of urban parks should be examined. An on-site questionnaire survey in Xi'an, China was conducted, where respondents answered perceived occurrences (POS) of different sounds as well as the perceived restorativeness scale (PRS). The canonical correlation analysis between the POS of 22 sounds and perceived restorativeness was employed. The results showed that the POS of 4 sounds was highly correlated with perceived restorativeness of urban parks, including birds, square dancing, singing, and motorbike. The POS of birds played a positive role while the POS of square dancing, singing, and motorbike played a negative role in four restorative factors. Besides, the POS of wind, playing children, and footsteps positively contributed to fascination. Additionally, the POS of playing children would also influence compatibility negatively to a lesser extent. These findings would be instructive in soundscape planning and design to improve the restorativeness of urban parks in the future.
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