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Key:

1 = Clearly Compatible—The average noise level is such that indoor and outdoor activities associated with the land use can be carried out with essentially no interference from noise.

2 = Normally Compatible—The average noise level is great enough to be of some concern, but common building construction should make the indoor environment compatible with the usual indoor activities, including sleeping.

3 = Normally Incompatible—The average noise level is significantly severe so that unusual and costly building construction may be necessary to ensure an adequate environment for indoor activities. Barriers must be erected between the site and prominent noise sources to make the outdoor environment tolerable.

4 = Clearly Incompatible—The average noise level is so severe that construction costs to make the indoor environment acceptable for activities would probably be prohibitive. The outdoor environment would be intolerable for outdoor activities associated with the land use.

Key:

1 = Clearly Compatible—The average noise level is such that indoor and outdoor activities associated with the land use can be carried out with essentially no interference from noise.

2 = Normally Compatible—The average noise level is great enough to be of some concern, but common building construction should make the indoor environment compatible with the usual indoor activities, including sleeping.

3 = Normally Incompatible—The average noise level is significantly severe so that unusual and costly building construction may be necessary to ensure an adequate environment for indoor activities. Barriers must be erected between the site and prominent noise sources to make the outdoor environment tolerable.

4 = Clearly Incompatible—The average noise level is so severe that construction costs to make the indoor environment acceptable for activities would probably be prohibitive. The outdoor environment would be intolerable for outdoor activities associated with the land use.

apply a type of technology standard by changing flight patterns and flight times to reduce noise impacts. New jet aircraft are required to use low-noise engines. The abatement strategy of insulating impacted structures against the intrusion of noise can also reduce the influence of aircraft noise.

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