Virtual Booth

Classroom observations indicated that group activities often generated excessive noise, which negatively affected the teaching and learning process. Students were frequently unable to hear the teacher clearly, resulting in reduced focus and declining academic performance. These findings are consistent with previous studies highlighting the impact of noise on learning environments. In response, this study explores an innovative and practical solution to monitor and manage classroom noise through the use of the QuietClass device. QuietClass is a smart noise-monitoring device designed to detect classroom sound levels and provide real-time feedback through LED colour indicators and an audible alarm. The system operates based on a traffic light concept: a green light indicates a safe noise level (below 60 dB) with no alarm; a yellow light signals a moderate level (60–80 dB) accompanied by a warning beep; and a red light indicates a high noise level (above 80 dB), triggering a continuous alarm. A mixed-methods approach was employed involving 30 Form 2 DLP students from SMK Batu Lintang. Data were collected using pre- and post-survey questionnaires administered before and after the implementation of QuietClass. The findings showed a significant reduction in classroom noise levels, with teachers requiring fewer verbal reminders to maintain discipline. Students also reported improved ability to hear instructions, as well as enhanced focus and concentration during lessons. In conclusion, QuietClass offers an effective solution for monitoring and managing classroom noise, contributing to a more structured, focused and conducive learning environment. This innovation aligns with Sustainable Development Goal 4 (Quality Education) and demonstrates potential benefits in educational, social, environmental and safety aspects.

Keywords: Classroom Noise; Smart Device; QuietClass