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Sound propagation over uneven ground and irregular topography (Document No: 19860022776)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Pierce, A. D. Parish Jr., J. R. Main, G. L. Benator, D. R. Kearns, J. A. |
| Copyright Year | 1986 |
| Description | The development of theoretical, computational, and experimental techniques for predicting the effects of irregular topography on long range sound propagation in the atmosphere is discussed. Irregular topography here 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 study focuses 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. |
| File Size | 2148237 |
| Page Count | 59 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860022776 |
| Archival Resource Key | ark:/13960/t17m55c0b |
| Language | English |
| Publisher Date | 1986-02-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Sound Propagation Terrain Analysis Aircraft Noise Topography Grazing Incidence Atmospheric Attenuation Surface Roughness Earth Surface Acoustic Attenuation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
