Source: http://www.bixby.org/parkside/documents/EIR/VolumeII/tableq.html

TABLE Q

TYPICAL OUTDOOR NOISE LEVELS

LAND USE
CNEL
Apartment Next To Freeway
88
3/4 Mile From Touchdown At Major Airport
86
Downtown With Some Construction Activity
78
Urban High Density Apartment
76
Urban Row Housing On Major Avenue
68
Old Urban Residential
59
Wooded Residential
51
Agricultural Cropland
44
Rural Residential
39
Wilderness Ambient
35

Source: EDAW, Inc.
CNEL = Community Noise Equivalent Level