Localized wave generation with a standard underwater array | Zendy

D. Kent Lewis | Zendy; David H. Chambers | Zendy; Richard W. Ziolkowski | Zendy

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Localized wave generation with a standard underwater array

Author(s) -

D. Kent Lewis,

David H. Chambers,

Richard W. Ziolkowski

Publication year - 1998

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.421909

Subject(s) - directivity , bandwidth (computing) , acoustics , underwater , radius , beamwidth , physics , usable , center frequency , beam (structure) , optics , beam pattern , side lobe , telecommunications , geology , computer science , antenna (radio) , band pass filter , oceanography , computer security , world wide web

Recent work at the NUWC Keyport has generated localized waves using Navy field equipment. The array, a rectangular arrangement of tonpiltz elements, was driven with precompensated signals to generate sound covering a decade of usable bandwidth. The elements were grouped by radius from the center and excited by signals designed specifically for each radius, for a total of 7 radii. Results of the angular scans show a narrowed beam pattern and lowered side lobes relative to design signals. Results of axial range scans show an increase in directivity of more than an order of magnitude over array specific tone bursts. Frequency analysis shows that the main beam is an octave wide while the surviving side lobes are narrow bandwidth.

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