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OCR for page 102
102 Aircraft Noise: A Toolkit for Managing Community Expectations
Table 6-2. Relative effect.
Decibel Level Duration -
Seconds Energy Units Day Energy Units Night
1 1 1 10
10 10 100
50 50 500
10 1 10 100
10 100 1000
50 500 5000
20 1 100 1000
10 1000 10000
50 5000 50000
30 1 1000 10000
10 10000 100000
50 50000 500000
40 1 10000 100000
10 100000 1000000
50 500000 5000000
50 1 100000 1 x 106
10 1000000 1 x 107
50 5000000 5 x 107
60 1 1 x 106 1 x 107
10 1 x 107 1 x 108
50 5 x 107 5 x 108
70 1 1 x 107 1 x 108
10 1 x 108 1 x 109
50 5 x 108 5 x 109
80 1 1 x 108 1 x 109
10 1 x 109 1 x 1010
50 5 x 109 5 x 1010
90 1 1 x 109 1 x 1010
10 1 x 1010 1 x 1011
50 5 x 1010 5 x 1011
100 1 1 x 1010 1 x 1011
10 1 x 1011 1 x 1012
50 5 x 1011 5 x 1012
110 1 1 x 1011 1 x 1012
The standards used by the Office of Planning and Environment are used by all divisions of the
FAA, with the exception of the additional criteria described by the Air Traffic Organization use
earlier.
NO DIVISION OF THE FAA HAS ADOPTED SPECIFIC THRESHOLD CRITERIA TO
DESCRIBE A SIGNIFICANT IMPACT FOR ANY SINGLE EVENT METRIC, WHETHER BY
NOISE LEVEL, DURATION OR NUMBER OF OPERATIONS.
Precedence of Federal and State/Local Standards
and When Applicable
The federal government and its aviation regulatory agency, the FAA, holds precedent over
local or state regulation of aircraft noise conditions, or numbers or time of operations when the
aircraft is in the air, on the runway, or actively taxiing to and from a terminal area (including
general aviation, cargo, or maintenance parking aprons) from a runway or taxiway. Several law-
suits have established the precedence of federal regulation over local control the most notable
of these was the case of City of Burbank vs. Lockheed Air Terminal, in 1973. In that case, the United
States Supreme Court found that local communities may not use their police powers to control
noise at airports that are owned by others. (145)
OCR for page 103
Noise Management and Public Response 103
Table 6-3. Land use compatibility guidelines 14 CFR PART 150 (Table 1, Appendix A).
YEARLY DAY-NIGHT AVERAGE SOUND
LEVEL (DNL) IN DECIBELS
BELOW OVER
LAND USE 65 65-70 70-75 75-80 80-85 85
RESIDENTIAL
Residential, other than mobile homes Y N1 N1 N N N
and transient lodgings
Mobile home parks Y N N N N N
Transient lodgings Y N1 N1 N1 N N
PUBLIC USE
Schools, hospitals, nursing homes Y 25 30 N N N
Churches, auditoriums, and concert halls Y 25 30 N N N
Governmental services Y Y 25 30 N N
Transportation Y Y Y2 Y3 Y4 N4
Parking Y Y Y2 Y3 Y4 N
COMMERCIAL USE
Offices, business and professional Y Y 25 30 N N
Wholesale and retail -- building materials,
hardware, and farm equipment Y Y Y2 Y3 YS N
Retail trade, general Y Y 25 30 N N
Utilities Y Y Y2 Y3 Y4 N
Communication Y Y 25 30 N N
MANUFACTURING AND PRODUCTION
Manufacturing, general Y Y Y2 Y3 Y4 N
Photographic and optical Y Y 25 30 N N
Agriculture (except livestock) and forestry Y Y6 Y7 Y8 Y8 Y8
Livestock farming and breeding Y Y6 Y7 N N N
Mining and fishing, resource production Y Y Y Y Y Y
and extraction
RECREATIONAL
Outdoor sports arenas and spectator sports Y Y Y5 N5 N N
Outdoor music shells, amphitheaters Y N N N N N
Nature exhibits and zoos Y Y N N N N
Amusements, parks, resorts, and camps Y Y Y N N N
Golf courses, riding stables, and water recreation Y Y 25 30 N N
The designations contained in this table do not constitute a federal determination that any use of land covered by the
program is acceptable under federal, state, or local law. The responsibility for determining the acceptable and permissible
land uses and the relationship between specific properties and specific noise contours rests with the local authorities. FAA
determinations under Part 150 are not intended to substitute federally determined land uses for those determined to be
appropriate by local authorities in response to locally determined needs and values in achieving noise compatible land uses.
Key To Table 1, Appendix A, 14 CFR Part 150
Y (Yes) Land use and related structures compatible without restrictions.
N (No) Land use and related structures are not compatible and should be prohibited.
NLR Noise Level Reduction (outdoor to indoor) to be achieved through incorporation of noise attenuation into the
design and construction of the structure.
25, 30, 35 Land use and related structures generally compatible; measures to achieve a NLR of 25, 30, or 35 dB must be
incorporated into design and construction of structure.
Notes for Table 1, Appendix A, 14 CFR Part 150
1. Where the community determines that residential or school uses must be allowed, measures to achieve outdoor-to-
indoor Noise Level Reduction (NLR) of at least 25 dB and 30 dB should be incorporated into building codes and be
considered in individual approvals. Normal residential construction can be expected to provide a NLR of 20 dB, thus,
the reduction requirements are often stated as five, ten, or 15 dB over standard construction and normally assume
mechanical ventilation and closed windows year round. However, the use of NLR criteria will not eliminate outdoor
noise problems.
2. Measures to achieve NLR of 25 dB must be incorporated into the design and construction of portions of these buildings
where the public is received, office areas, noise-sensitive areas, or where the normal noise level is low.
3. Measures to achieve NLR of 30 dB must be incorporated into the design and construction of portions of these buildings
where the public is received, office areas, noise-sensitive areas, or where the normal noise level is low.
4. Measures to achieve NLR of 35 dB must be incorporated into the design and construction of portions of these buildings
where the public is received, office areas, noise-sensitive areas, or where the normal noise level is low.
5. Land use compatible provided special sound reinforcement systems are installed.
6. Residential buildings require a NLR of 25 dB.
7. Residential buildings require a NLR of 30 dB.
8. Residential buildings not permitted.
Source: FAR Part 150 Airport Noise Compatibility Planning, Appendix A, Table 1.
