Evaluating the Urban Acoustic Environment Through Mobile Monitoring: Are Campus Noise Levels Within Safe WHO Standards?

Introduction

Noise pollution is a public health concern in urban environments. A university campus environment is at high risk of continuous exposure to elevated noise that can impair the concentration, communication, and overall wellbeing of students.

Objective

This study was conducted to measure and record noise levels around the campus at different times of the day (morning, afternoon, and evening) using a mobile application and to compare data with WHO recommended noise exposure limits.

Methodology

This study assessed daytime noise levels across a university campus and adjacent neighborhood using a cross-sectional observational design. Noise measurements were collected at 20 purposively selected locations representing major activity zones, including the main gate, cafeteria, corridors, parking areas, and roadside sections. Data were recorded during the morning (08:00–10:00) and afternoon (13:00–15:00) using a free mobile decibel-meter application. World Health Organization environmental noise assessment guidelines were followed. Each reading was taken from a height of 1.2 meters and at least 1–2 meters away from reflective surfaces. Two short samples per time block were recorded, averaged, and supported with contextual observations.

Results

The results showed that average daytime noise levels ranged from 66.9 to 71.3 dBA, which exceeded the recommended limit of 55 dBA. Afternoon readings were consistently higher across all locations, reflecting increased student activity and vehicular flow. High noise hotspots included the Café, Main Road (Campus Side), and the main gate, where levels frequently exceeded 75–84 dBA. Relatively quieter locations, such as the library exterior and hostel areas, also surpassed WHO thresholds.

Conclusion

The study concluded that the university campus environment was found to be significantly noisier than international safety standards. Targeted noise management strategies in high-activity zones are required to maintain a conducive academic environment. The findings also demonstrate the practicality of mobile-based noise mapping as a low-cost assessment tool for campus environmental monitoring.