Aside from the obvious of loud noises causing sleep interruption, noise can cause anxiety, tension, or even illness. Prolonged exposure to high levels of noise can cause hearing loss.
Noise is considered a form of environmental pollution. Due to some of these concerns there is a noise curfew for Lindbergh Field and with few exceptions departures are allowed only between 6:30 am and 11:30 pm.
Trees can be a factor in reducing noise.