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 while OLED display presents real-time noise status for teacher monitoring. The system operates based on school bell and traffic light concept: a green light indicates a normal 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. This innovation aligns with Sustainable Development Goal 4 (Quality Education) and demonstrates potential benefits in educational, social, environmental and safety aspects.