Monitoring Military Jet Noise Around Air Bases: Methodologies and Metrics

Noise pollution from military aircraft poses a significant concern for communities near air bases, particularly due to the high-intensity and variable nature of jet noise. This study expands on existing datasets by measuring noise from F-16 jets across multiple locations and time periods around Belgian air bases, with a focus on areas linked to high complaint rates. Acoustic and psychoacoustic metrics were employed to analyze the sound environment and assess the factors contributing to perceived annoyance. Results indicate that while loudness effectively summarizes sound level variations, it alone cannot fully account for annoyance. Metrics such as sharpness, roughness, and fluctuation strength are essential for capturing the complexity of human auditory perception. The study also finds that thrust levels, number of jets, and environmental context (e.g., presence of buildings) significantly influence sound levels, but do not always correlate with perceived annoyance. Additionally, all measurements exhibited wide confidence intervals and notable experimental uncertainty, even under similar conditions, highlighting the variability of military jet noise. These findings underscore the importance of using multiple metrics for accurate characterization and to demonstrate the challenges in assessing and mitigating noise impact from military aircraft.