Publication: Comparative study on reverberation time measurement for classrooms
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Date
2024-07-01
Authors
Yeong Wan Yaow
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Abstract
This thesis explores the Comparative Study on Reverberation Time Measurement For Classrooms. Classroom acoustics significantly impact learning by affecting speech intelligibility and student concentration, yet many educational institutions face challenges in meeting acoustic standards. The research aims to identify the differences and performance of each classroom, compared to each other and other published sources. The apparatus is set up according to specifications on ISO-3382 part 2, using the Engineering Method approach for the number of source-microphone positions. Interrupted noise method is used for the measuring of reverberation time, using a portable speaker as the sound source instead of professional standard of omnidirectional speakers. The findings reveal that the classrooms are in good compliance with expectations with only little noncompliance at certain frequency band from the room MEK1 possibly due to the influence of room modes. MEK2 shows the best result with great compliance for standards of lecture halls, and MEK3 showing great compliance with the standards for a multipurpose room. The study concludes that the impact of flooring and wall materials on a room's acoustic environment is great. MEK2’s carpet flooring has contributed to the great acoustic performance of the room. MEK1's higher RT values due to its reflective surfaces emphasize the room of improvement for additional acoustic treatment, while MEK3's mixed performance are due to reflective tiles and absorptive wall material. These insights have implications for rooms of improvements and further supporting evidence for results.