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Aircraft Noise and Sound Insulation

Aircraft Noise and Sound Insulation. Fred Pierson Navy East Coast AICUZ Center of Excellence. RESULTS. Reduced take-off weights Quiet hours Flight track changes Reduction in operations Litigation Loss of flying mission. A ir I nstallations C ompatible U se Z ones.

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Aircraft Noise and Sound Insulation

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  1. Aircraft Noise and Sound Insulation Fred Pierson Navy East Coast AICUZ Center of Excellence

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

  3. Air Installations Compatible Use Zones

  4. The AICUZ Program • Defines • Noise Zones • Accident Potential Zones • Recommends Land Use Guidelines

  5. 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

  6. What are the benefits of Sound Insulation? • Reduces • Speech interference • Sleep disturbance • It’s energy efficient • Reduces air infiltration • Higher “R” value

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

  8. 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

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

  10. 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

  11. Noise Zones v. Contours <65 DNL 65 DNL 65-69 DNL 70 DNL 70-74 dB DNL 75 DNL >75 dB DNL

  12. Mitigation Changes in Noise Environment result from Changes in NOISE SYSTEM SOURCE PATH RECEIVER

  13. 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

  14. Costs • Depends on noise zone—the 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

  15. 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

  16. 68 dB + 3 dB = 71 dB DNL • 25 dB (65-70 DNL) • 30 dB (70-75 DNL) • 35 dB (75-80 DNL)

  17. Questions?

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