Aircraft Noise and Sound Insulation

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Aircraft Noise and Sound Insulation

• Fred Pierson
• Navy East Coast
• AICUZ Center of
• Excellence

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RESULTS

• Reduced take-off weights
• Quiet hours
• Flight track changes
• Reduction in operations
• Litigation
• Loss of flying mission

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Air Installations Compatible Use Zones
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The AICUZ Program

• Defines
• Noise Zones
• Accident Potential Zones
• Recommends Land Use Guidelines

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The AICUZ Program

• AICUZ is non-binding
• Land use control is the responsibility of local,
  regional and state governments
• Building codes w/proper NLR reduces noise impact

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What are the benefits of Sound Insulation?

• Reduces
• Speech interference
• Sleep disturbance
• Its energy efficient
• Reduces air infiltration
• Higher R value

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Aircraft Noise and Sound Insulation

• Concerns go back to 1960s
• 1967-Development of Sound Insulation methods for
  use around LAX
• 1971-Noise Control Act
• Late 1980s-DOD and FAA prepared Sound Insulation
  Guide
• 1992- Publication DOT/FAA/PP 92-5

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New Sound Insulation Guidelines

• 2005- Navy sponsored update
• Serves as a guide for NLR in residential
  buildings
• Covers
• Building materials and cost
• New and existing construction

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Mitigating Aircraft Noise

• Aircraft noise can be disturbing
• Sound insulation is not Sound elimination
• DNL and the Noise Exposure Zones

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DNL
DAY-NIGHT AVERAGE SOUND LEVEL

• 24-hour Average Sound Level with a weighting
  factor for night operations
• Often used for environmental noise, especially
  aircraft noise in the U.S.
• EPA and FAA established an interior goal of 45 DNL

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Noise Zones v. Contours
lt65 DNL
65 DNL
65-69 DNL
70 DNL
70-74 dB DNL
75 DNL
gt75 dB DNL
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Mitigation
Changes in Noise Environment result from
Changes in NOISE SYSTEM
SOURCE PATH RECEIVER
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Sound Insulation

• Sources of Noise Paths
• Gaps and Cracks
• Windows and Doors
• Walls and Ceilings
• Fireplaces
• Air Conditioners
• Exhaust fans
• Ventilation
• All building elements must work together in a
  balanced manner to reduce noise intrusion

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Costs

• Depends on noise zonethe higher the noise level,
  the greater the cost
• Average cost to insulate an existing home near an
  airport 10K-50K.
• Most modern construction already reduces interior
  noise by about 20-25 dB
• New home sound insulation is less

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Model Building Code

• Appendix D, Noise level reduction Design
  Requirements
• For NLR of
• 25 dB (65-70 DNL)
• 30 dB (70-75 DNL)
• 35 dB (75-80 DNL)
• Adaptable for
• Commercial structures
• Civil Airports

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68 dB 3 dB 71 dB DNL
25 dB (65-70 DNL) 30 dB (70-75 DNL) 35 dB (75-80
DNL)
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Questions?