| contributor | ICPI, Lyon 69288 |
| creator | ESCUDIE (B.) |
| date | 2005-07-20T12:57:02Z |
| 2005-07-20T12:57:02Z | |
| 1988 | |
| description | Space and space frequency Imaging of acoustic sources deals with the far field generated by various noise sources . If for moveless sources such a problem is strictly related to spectrum analysis, it deals in fact for moving sources with the so called joint (or conjoint) representations such as time and frequency (space and space frequency) representations . Dealing with inertial sources (constant speed and linear trajectory) the Wigner-Ville representation enables an easy derivation of such an imaging technique . Positive Deconvolution taking into account a priori informations is able to increase the angular resolving power, and suggests to locate the "bright spots" (or highligths) related to the center of phase of the emitted waves . |
| L'imagerie spatiofréquentielle acoustique s'apparente à l'analyse spectrale dans le cas des bruiteurs fixes . Dans le cas des bruiteurs mobiles elle relève de l'analyse non stationnaire utilisant la Représentation conjointe de Wigner-Ville, notamment dans le cas de mouvements rectilignes uniformes . Dans tous les cas la technique de déconvolution positive emploie l'information a priori pour localiser les centres de phase associés aux ondes émises. | |
| format | 51964 bytes |
| application/pdf | |
| identifier | Traitement du Signal [Trait. Signal], 1988, Vol. 5, N° 5, p. 173-187 |
| 0765-0019 |
| http://hdl.handle.net/2042/1678 |
| language | en_US |
| publisher | GRETSI, Saint Martin d'Hères, France |
| rights | http://irevues.inist.fr/IMG/pdf/Licence.pdf |
| source | Traitement du Signal [Trait. Signal], ISSN 0765-0019, 1988, Vol. 5, N° 5, p. 173-187 |
| subject | Analyse signal |
| Analyse spectrale | |
| Signal acoustique | |
| title | 4 - Imagerie spatiofréquentielle acoustique des bruiteurs mobiles. Possibilités de déconvolution positive |
| Space and frequency distribution for acoustic intensity radiated by moving sources and positive deconvolution | |
| type | Article |