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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722750305
Category :
Languages : en
Pages : 56
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Book Description
Theoretical, computational, and experimental techniques were developed for predicting the effects of irregular topography on long range sound propagation in the atmosphere. Irregular topography is understood to imply a ground surface that: (1) is not idealizable as being perfectly flat, or (2) that is not idealizable as having a constant specific acoustic impedance. The focus is on circumstances where the propagation is similar to what might be expected for noise from low altitude air vehicles flying over suburban or rural terrain, such that rays from the source arrive at angles close to grazing incidence. Berthelot, Yves H. and Pierce, Allan D. and Kearns, James A. and Zhou, Ji-Xun Unspecified Center...
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722750305
Category :
Languages : en
Pages : 56
Get Book Here
Book Description
Theoretical, computational, and experimental techniques were developed for predicting the effects of irregular topography on long range sound propagation in the atmosphere. Irregular topography is understood to imply a ground surface that: (1) is not idealizable as being perfectly flat, or (2) that is not idealizable as having a constant specific acoustic impedance. The focus is on circumstances where the propagation is similar to what might be expected for noise from low altitude air vehicles flying over suburban or rural terrain, such that rays from the source arrive at angles close to grazing incidence. Berthelot, Yves H. and Pierce, Allan D. and Kearns, James A. and Zhou, Ji-Xun Unspecified Center...
Author: Yves Henri Berthelot
Publisher:
ISBN:
Category : Acoustic surface waves
Languages : en
Pages :
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Author: Yves Henri Berthelot
Publisher:
ISBN:
Category :
Languages : en
Pages : 55
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 968
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 780
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1638
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Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1028
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Author: M. S. Howe
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 44
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Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1030
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Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
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ISBN:
Category : Science
Languages : en
Pages : 1298
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