http://www.cnr.it/ontology/cnr/individuo/prodotto/ID183069
Frequency and amplitude alterations of sound modes in a space-dependent random mass density field (Articolo in rivista)
- Type
- Label
- Frequency and amplitude alterations of sound modes in a space-dependent random mass density field (Articolo in rivista) (literal)
- Anno
- 2004-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1088/0959-7174/14/2/002 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- MURAWSKI K; NOCERA L; PELINOVSKI E (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://dx.doi.org/10.1088/0959-7174/14/2/002 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
- Note
- The Smithsonian/NASA Astrophysics Data System (literal)
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Nocera, L.: CNR, Inst Atom & Mol Phys, I-56124 Pisa, Italy
Murawski, K.: Marie Curie Sklodowska Univ, Inst Phys, PL-20031 Lublin, Poland
Pelinovsky, E.: Inst Appl Phys, Nizhnii Novgorod 603600, Russia (literal)
- Titolo
- Frequency and amplitude alterations of sound modes in a space-dependent random mass density field (literal)
- Abstract
- We investigate the effect of a space-dependent random mass density field on small amplitude acoustic modes that are settled in a semi-infinite medium of a temperature growing linearly with depth. Using a perturbation method, the dispersion relation is derived in the form of Hill's determinant. Numerical solutions of this equation lead to the following conclusions: (a) a weak random field (with ?eff = 0.05) essentially affects long waves which experience attenuation and a frequency reduction; (b) for a stronger random field (with ?eff = 0.1), high-order sound modes behave as sound waves as they are attenuated and their frequencies are increased; (c) for a sufficiently strong random field (with ?eff = 0.2), mode coupling occurs, as a result of which the dispersive curves cross each other, the sound modes loose their identities, and some modes are amplified. Here ?eff denotes the effective strength of a random field. (literal)
- Editore
- Prodotto di
- Autore CNR
- Insieme di parole chiave
Incoming links:
- Prodotto
- Autore CNR di
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
- Editore di
- Insieme di parole chiave di