Most noise impacts occur when aircraft are on their final approach to or initial departure paths from the airport. Since people have a wide range of sensitivity to noise, the perceived extent of noise varies among individuals. Pilots may be directed to avoid thunderstorm activity by flying outside of their normal arrival and departure routes. Very low cloud cover may require aircraft to have instrument arrivals resulting in longer approaches.
Noise exposure can also change as a result of the construction of new runways and runway extensions.
This will result in new areas being affected by aircraft flyover activity. Although operations at OIA have increased and activity at OEA has remained stable, noise exposure has been reduced in many areas around these facilities.