![]() ![]() In this study, the sound preference and acoustic comfort of birdsong and music decreased as the human sound volume increased. Crowd density and the surrounding visual environment also influence evaluations of the overall sound environment. ![]() When the superimposed sounds were birds and music, the evaluation of the environment decreased with the human voice increasing in volume. The results showed that when different types of sounds in urban public spaces are superimposed with human sound, the volume of human sound (45.6 dBA, 55.6 dBA, and 65.6 dBA) significantly affects the acoustic evaluation of the environment. A subjective evaluation of both visual and auditory aspects was then performed in the laboratory. Four sets of sound sources and six sets of images were collected in situ in urban public spaces. ![]() Primary sound sources and scenes in Harbin, China urban public space served as the research object. This study aimed to investigate whether human sound impacts evaluations of the overall environment from both visual and auditory aspects. The sound of human voices significantly impacts evaluations of acoustic indicators in urban public spaces. A crowd can be both a sound source and an absorber. ![]()
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