Accession Number : ADD018113

Title :   Multiple Frequency Steerable Acoustic Transducer.

Descriptive Note : Patent, Filed 6 Apr 95, patented 23 Apr 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Lindberg, Jan F

Report Date : 23 Apr 1996

Pagination or Media Count : 10

Abstract : A multiple frequency acoustic transducer is constructed as a stacked configuration 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 electro-acoustic 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.

Descriptors :   *ELECTROACOUSTIC TRANSDUCERS, *PATENTS, LAYERS, TRANSPARENCE, ELECTRICAL CONDUCTIVITY, PLANAR STRUCTURES, STACKING

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE