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Wave propagation through random media: a local method of small perturbations based on the helmholtz equation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Grosse, Ralf |
| Copyright Year | 1990 |
| Description | Propagation of sound through the turbulent atmosphere is a statistical problem. The randomness of the refractive index field causes sound pressure fluctuations. Although no general theory to predict sound pressure statistics from given refractive index statistics exists, there are several approximate solutions to the problem. The most common approximation is the parabolic equation method. Results obtained by this method are restricted to small refractive index fluctuations and to small wave lengths. While the first condition is generally met in the atmosphere, it is desirable to overcome the second. A generalization of the parabolic equation method with respect to the small wave length restriction is presented. |
| File Size | 239721 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910007388 |
| Archival Resource Key | ark:/13960/t44r2sv9j |
| Language | English |
| Publisher Date | 1990-12-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Approximation Statistical Analysis Wave Propagation Atmospheric Turbulence Pressure Oscillations Refractivity Wave Equations Variations Perturbation Sound Pressure Parabolic Differential Equations Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
