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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721284542
Category :
Languages : en
Pages : 28
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Book Description
Aircraft engine noise research in the United States has made considerable progress over the past 10 years for both subsonic and supersonic flight applications. The Advanced Subsonic Technology (AST) Noise Reduction Program started in 1994 and will be completed in 2001 without major changes to program plans and funding levels. As a result, significant progress has been made toward the goal of reducing engine source noise by 6 EPNdB (Effective Perceived Noise level in decibels). This paper will summarize some of the significant accomplishments from the subsonic engine noise research performed over the past 10 years. The review is by no means comprehensive and only represents a sample of major accomplishments. Bridges, James and Envia, Edmane and Huff, Dennis Glenn Research Center NASA/TM-2001-211083, NAS 1.15:211083, ISABE-2001-1017, E-12927
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721284542
Category :
Languages : en
Pages : 28
Get Book Here
Book Description
Aircraft engine noise research in the United States has made considerable progress over the past 10 years for both subsonic and supersonic flight applications. The Advanced Subsonic Technology (AST) Noise Reduction Program started in 1994 and will be completed in 2001 without major changes to program plans and funding levels. As a result, significant progress has been made toward the goal of reducing engine source noise by 6 EPNdB (Effective Perceived Noise level in decibels). This paper will summarize some of the significant accomplishments from the subsonic engine noise research performed over the past 10 years. The review is by no means comprehensive and only represents a sample of major accomplishments. Bridges, James and Envia, Edmane and Huff, Dennis Glenn Research Center NASA/TM-2001-211083, NAS 1.15:211083, ISABE-2001-1017, E-12927
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Category :
Languages : en
Pages :
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Languages : en
Pages :
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Category :
Languages : en
Pages : 16
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Author: Interagency Surface Vehicle Noise Research Panel
Publisher:
ISBN:
Category : Noise control
Languages : en
Pages : 108
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Author: Interagency Aircraft Noise Research Panel
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 236
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Book Description
Author: United States. Federal Interagency Machinery and Construction Noise Research Panel
Publisher:
ISBN:
Category : Construction equipment
Languages : en
Pages : 194
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Author: United States. Office of Noise Abatement and Control
Publisher:
ISBN:
Category : Noise control
Languages : en
Pages : 924
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Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781794400238
Category : Science
Languages : en
Pages : 32
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Book Description
Significant progress continues to be made with noise reduction for turbofan engines. NASA has conducted and sponsored research aimed at reducing noise from commercial aircraft. Since it takes many years for technologies to be developed and implemented, it is important to have aggressive technology goals that lead the target entry into service dates. Engine noise is one of the major contributors to the overall sound levels as aircraft operate near airports. Turbofan engines are commonly used on commercial transports due to their advantage for higher performance and lower noise. The noise reduction comes from combinations of changes to the engine cycle parameters and low noise design features. In this paper, an overview of major accomplishments from recent NASA research programs for engine noise will be given. Huff, Dennis L. Glenn Research Center NASA/TM-2007-214495, E-15787
Author: United States. Congress. House. Committee on Science and Astronautics
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 64
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