"Sirens. Motorcycles. Car alarms. Dogs barking. Car horns. Children playing. Airplanes overhead. While these are often considered nuisances that one must put up with when living in an urban area, these sounds are also main sources of noise pollution and can cause serious damage."
"In 2018, the World Health Organization noted that “prolonged exposure to environmental noise is associated with increased risk to both physiological and psychological health” including higher rates of hypertension, coronary heart disease, and stroke. However, mechanisms for measuring and even visualizing noise pollution are rare, although there are smartphone apps, like Walker’s NoiseScore, that allow citizen-scientists to measure and/or describe the noise around them"