Acoustic transducer and underwater sounding apparatus

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

Reexamination Certificate

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Reexamination Certificate

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11338801

ABSTRACT:
An acoustic transducer1has a first cylindrical portion1A and a second hemispherical portion1B on which a plurality of transducer elements10a, 10bare arranged. The transducer elements on the cylindrical portion are arranged to have six nearest neighbors. The arrangement may be such that the six transducer elements surrounding a given element describe the vertices of a regular hexagon. The hexagons thus described may be aligned so that two of their sides are parallel to the axis of the cylinder. The elements on the hemispherical portion may be arranged so that some elements have five nearest neighbors and others have six (the neighboring elements describing, for example, the vertices of hexagons and pentagons respectively). An underwater sounding apparatus may be constructed using the transducer.

REFERENCES:
patent: 4158189 (1979-06-01), Wardle
patent: 4328569 (1982-05-01), Trott et al.
patent: 6671229 (2003-12-01), Schmidt
patent: 6711096 (2004-03-01), Benjamin
patent: 7164621 (2007-01-01), Okunishi et al.
patent: 2002/0080685 (2002-06-01), Schmidt
patent: 2003/0117897 (2003-06-01), Schmidt
patent: 2005/0117755 (2005-06-01), Okunishi et al.
patent: 2005/0226099 (2005-10-01), Satoh et al.
patent: 2006/0164919 (2006-07-01), Watanabe et al.
patent: 2422744 (2006-08-01), None
patent: 2000-162308 (2000-06-01), None
patent: 2001-343450 (2001-12-01), None
patent: 2003-202370 (2003-07-01), None
patent: 2003-337171 (2003-11-01), None
“Spherical Models,” Dover Publications, Inc., Magnus J. Wenninger, Mineola, New York, Nov. 1999, pp. 79-124.

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