Communications – electrical: acoustic wave systems and devices – Acoustic image conversion
Patent
1992-10-21
1993-11-16
Lee, Benny T.
Communications, electrical: acoustic wave systems and devices
Acoustic image conversion
367103, 73625, 310334, 333144, 333139, 12866101, G03B 4206, H03H 938
Patent
active
052630048
ABSTRACT:
Apparatus and method for compensating for differences in time at which an incoming acoustic wave is received by an array of acoustic signal receivers to take account of the shape of the incoming wave and the non-zero incidence angle of its approach. Each receiver is provided with a time delay module that introduces a large or coarse scale time delay .DELTA.t.sub.L plus a small or fine scale time delay .DELTA.t.sub.S, where .DELTA.t.sub.L is an integral multiple of a coarse scale time interval length .DELTA.t.sub.c and .DELTA.t.sub.S may be varied continuously from 0 to a predetermined time interval length (.DELTA.t.sub.S).sub.max that may be made at least as large as .DELTA.t.sub.c.
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Hewlett--Packard Company
Lee Benny T.
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