Effect of Audio–Visual Factors in the Evaluation of Crowd Noise

A crowd can be both a sound source and an absorber. The of human voices significantly impacts evaluations acoustic indicators in urban public spaces. This study aimed to investigate whether the overall environment from visual auditory aspects. Primary sources scenes Harbin, China space served as research object. Four sets six images were collected situ subjective evaluation aspects was then performed laboratory. results showed that when different types sounds spaces are superimposed with sound, volume (45.6 dBA, 55.6 65.6 dBA) affects environment. When birds music, decreased voice increasing volume. Crowd density surrounding also influence In this study, preference comfort birdsong music increased. effect combined traffic scores for at higher volumes. experiments on audio–visual interactions which people evaluated assessments is negatively related magnitude crowd. 45.6 dBA 65.6dBA, there significant high-density people. pressure level same, changes more likely affect people’s