Multiple frequency steerable acoustic transducer

Details Multiple frequency steerable acoustic transducer Multiple frequency steerable acoustic transducer

1995-04-06

1996-04-23

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367103, 367119, 310334, H04R 1700

Patent

active

055110436

ABSTRACT:
A multiple frequency acoustic transducer is constructed as a stacked confration of N groups of multi-layer transducer elements separated from one another by an electrical insulating material. Each multi-layer transducer element in an n-th one of the N groups has a layer of acoustically transparent electroacoustic transducer material whose thickness is determined by the n-th frequency of operation. Each multi-layer transducer element has opposing planar surfaces with electrically conductive material deposited thereon. For each multi-layer transducer element, the electrically conductive material is formed into parallel strips electrically isolated from one another on at least one of each element's opposing planar surfaces. The parallel strips associated with each multi-layer transducer element in any one of the n-th groups have a unique angular orientation in the n-th group.

REFERENCES:
patent: 4805157 (1989-02-01), Ricketts
patent: 4870867 (1989-10-01), Shaulov
patent: 5410205 (1995-04-01), Gururaja

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