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This research study is an experimental study focusing on auditory perception. The objectives of this research are (1) to evaluate acoustical characteristics of the classroom (2) to assess acoustical perceptions of students with different educational backgrounds. The subjects of this study consisted of 54 science students and 53 art students. The control variable is the Percentage of Absorbing Surface (PAS) inside the classroom. The first procedure of experiment was to simulate a lecture speechdoi:10.29333/iji.2019.12215a fatcat:jwqeac3gdbfnzegj2dkzrtuefi