Measuring the characteristics of backscattering of sound on a rough surface in the near-field zone of a phased array

Autor:	B. M. Salin, O. A. Potapov, M. B. Salin, A. S. Chashchin
Rok vydání:	2016
Předmět:	010302 applied physics Physics Acoustics and Ultrasonics business.industry Phased array Acoustics Bragg's law Near and far field Acoustic wave Sea state Spectral component 01 natural sciences Signal symbols.namesake Optics 0103 physical sciences symbols business 010301 acoustics Doppler effect
Zdroj:	Acoustical Physics. 62:74-88
ISSN:	1562-6865 1063-7710
Popis:	The paper presents the results of an experiment on measuring the characteristics of backscattering of sound waves by a rough surface. Measurements were conducted in the near zone of a vertical array, which made it possible with a high degree of accuracy to control the propagation conditions and the angles of incidence of an acoustic wave onto the surface. Tonal signals were emitted in a constant mode at frequencies of 0.5–3.5 kHz. The Doppler spectrum of the scattered signal was analyzed in detail, the spectral component corresponding to Bragg scattering was isolated, and the width of this component was determined. The possibilities of calculating the scattered field using two forms of the sea state spectrum are studied and compared: the two-dimensional spatiotemporal sea state spectrum, which was measured optically, and the conventional one-dimensional time spectrum, measured with a single surveying mark.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c72abba8d66243982447911680d2afa6 https://doi.org/10.1134/s106377101506010x Zobrazit plný text záznamu Plný text ve formátu PDF