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The quality of the acoustic environments at Xi'an Jiatong-Liverpool University (XJTLU) and Soochow University (Dushuhu Campus, SUDC) in Suzhou City were investigated in the present work through real-time noise level measurements and questionnaire surveys. Before commencing the measurements and surveys, these two campuses' sound sources were summarized and classified into four categories through on-site observation: human-made, machinery, living creatures, and natural physical sounds. For thedoi:10.3390/acoustics4010002 fatcat:5md6yvghvvglxbh3nvonz63da4