5The AICUZ Program Defines Noise Zones Accident Potential Zones Recommends Land Use Guidelines
6The AICUZ Program AICUZ is non-binding Land use control is the responsibility of local, regional and state governmentsBuilding codes w/proper NLR reduces noise impact
7What are the benefits of Sound Insulation? ReducesSpeech interferenceSleep disturbanceIt’s energy efficientReduces air infiltrationHigher “R” valueWhat are the benefits of sound insulation?First, it is energy efficient, reducing heating and cooling costs.Sound insulation also reduces interference with speech and reduces sleep interference.The goal of sound insulation is to reduce the interior noise to at least 45 decibels. Consequently, if a home is in the 75 DNL noise contour of an airport, 30 decibels of sound insulation would be required to bring the interior noise down to 45 decibels.
8Aircraft Noise and Sound Insulation Concerns go back to 1960’s1967-Development of Sound Insulation methods for use around LAX1971-Noise Control ActLate 1980’s-DOD and FAA prepared Sound Insulation Guide1992- Publication DOT/FAA/PP 92-5
9New Sound Insulation Guidelines 2005- Navy sponsored updateServes as a guide for NLR in residential buildingsCoversBuilding materials and costNew and existing constructionThe Navy has recently produced a book on sound Insulation Guidelines for residences. This book is downloadable at the address on the slide. Further information is also available from Mr. Fred Pierson at the Navy’s AICUZ Center of Excellence, at (757) A brochure on sound insulation is also available.
10Mitigating Aircraft Noise Aircraft noise can be disturbingSound insulation is not Sound eliminationDNL and the Noise Exposure Zones
11DNLDAY-NIGHT AVERAGE SOUND LEVEL24-hour Average Sound Level with a weighting factor for night operationsOften used for environmental noise, especially aircraft noise in the U.S.EPA and FAA established an interior goal of 45 DNL
13Noise Zones v. Contours <65 DNL 65-69 DNL 70-74 dB DNL
14Changes in Noise Environment Changes in NOISE SYSTEM MitigationChanges in Noise Environmentresult fromChanges in NOISE SYSTEMSOURCEPATHRECEIVER
15Sound Insulation Sources of Noise Paths Gaps and Cracks Windows and DoorsWalls and CeilingsFireplacesAir ConditionersExhaust fansVentilationAll building elements must work together in a balanced manner to reduce noise intrusionHouses provide paths for noise to enter. These paths include windows, doors, walls, ceilings, fireplaces, in-wall air conditioners, exhaust fans, and windows left open for ventilation. Each of these paths must be addressed if a significant noise level reduction is to be achieved.
16CostsDepends on noise zone—the higher the noise level, the greater the costAverage cost to insulate an existing home near an airport $10K-$50K.Most modern construction already reduces interior noise by about dBNew home sound insulation is lessSo, what are the costs? Costs will vary with the noise zone—the higher the noise zone the more sound insulation is required.While the average cost to insulate an existing home dB is $15,00 to $45,000, in reality, good construction techniques may already provide decibels of sound insulation. The cost of insulation is even less with new construction because it does not require the cost of retrofitting.(NOTE—IT WOULD BE WORTH POINTING OUT THAT THE VERY HIGH NOISE CONTOURS COVER LITTLE LAND OFF-STATION]
17Model Building CodeAppendix D, “Noise level reduction Design Requirements”For NLR of25 dB (65-70 DNL)30 dB (70-75 DNL)35 dB (75-80 DNL)Adaptable for:Commercial structuresCivil Airports