Accession Number : AD0652344

Title :   DIRECTIONAL CHARACTERISTICS OF SLOTTED PIEZOELECTRIC CERAMIC TUBES.

Descriptive Note : Final rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER JOHNSVILLE PA AERO-ELECTRONIC TECHNOLOGY DEPT

Personal Author(s) : Devine,J. A.

Report Date : 18 APR 1967

Pagination or Media Count : 36

Abstract : Single element and line transducers of various dimensions were fabricated from radially polarized, slotted piezoelectric ceramic tubes. The tubes exhibited multilobe directivity characteristics, in a plane normal to the axis of the tubes, at certain discrete frequencies. The shape of the directivity patterns are explained in terms of circumferential extensional vibrations with geometrically determined nodal positions. In addition, unidirectional response patterns were found at frequencies that were below the fundamental breathing mode of the tubes. (Author)

Descriptors :   (*PIEZOELECTRIC TRANSDUCERS, PIPES), (*UNDERWATER SOUND EQUIPMENT, PIEZOELECTRIC TRANSDUCERS), CERAMIC MATERIALS, SOUND TRANSMISSION, ACOUSTIC PROPERTIES, PROPAGATION, SLOT ANTENNAS, ANTENNA RADIATION PATTERNS, BARIUM COMPOUNDS, TITANATES, LEAD COMPOUNDS, ZIRCONATES

Subject Categories : Electrical and Electronic Equipment
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE