Title :
Tomographical reconstruction of oceanic inhomogeneities. 1. Forming partially coherent acoustic wave structures in the ocean with spatially localized noise sources
Author :
Smirnov, Ivan P. ; Khil´ko, A.I. ; Caruthers, Jerald W.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
Abstract :
The formation and features of partially coherent acoustical waves excited by spatially localized noise sources are investigated in this work. It is shown that nonuniform distributions of the parameters of partially coherent waves in oceanic waveguides appear due to inhomogeneities of oceanic environments. Physical models of spatially localized noise sources, such as ships, are developed. Analysis and calculations show that interference noise can be eliminated by increasing the size and frequency bandwidth of the noise sources. The conditions for forming coherence bundle structures are studied from the point of view of the possibilities of using them for acoustical measurements
Keywords :
acoustic tomography; oceanographic techniques; underwater sound; acoustic propagation; acoustic tomography; interference noise; localized noise source; measurement technique; nonuniform distribution; ocean acoustics; oceanic inhomogeneity; partially coherent acoustic wave structure; sea; ship; spatially localized noise source; tomographical reconstruction; underwater sound; Acoustic measurements; Acoustic waveguides; Bandwidth; Coherence; Frequency; Interference elimination; Marine vehicles; Sea measurements; Waveguide components; Working environment noise;
Conference_Titel :
OCEANS '95. MTS/IEEE. Challenges of Our Changing Global Environment. Conference Proceedings.
Conference_Location :
San Diego, CA
Print_ISBN :
0-933957-14-9
DOI :
10.1109/OCEANS.1995.528678
