公开(公告)号：AU769905B1

公开(公告)日：2004-02-05

申请号：AU4982790

申请日：1989-12-22

Applicant: LOCKHEED CORP

Inventor： STEARNS CLEO MILFORD ,  ERICKSON DAVID JUSTA ,  IZZO LOUIS MANUEL

IPC: B06B1/06 ,  H04R1/26 ,  H04R1/44 ,  H04R15/02

Abstract: The assembly may be operated at low and/or high frequencies in a sonar array. It comprises a low frequency unit of tonpilz design including a low frequency driver 18, a low frequency tail mass 19 and a composite head mass 16, the composite head mass acting as a single low frequency water driving piston and comprising a plurality of high frequency units 25 forming individual high frequency water driving pistons. The high frequency units are also of tonpilz design, with independent drivers 24, independent head masses, and a common tail mass 22. The use of a common tail mass simplifies the design without compromising high frequency operation. The design leads to more efficient operation at both frequencies by minimizing the head mass to tail mass ratios.

公开(公告)号：AU8881791A

公开(公告)日：1992-06-25

申请号：AU8881791

申请日：1991-12-04

Applicant: LOCKHEED CORP

Inventor： ERICKSON DAVID JUSTA ,  WINNICKI ROBERT T ,  IZZO LOUIS MANUEL

IPC: H04R1/28 ,  G10K9/12 ,  H04R17/08 ,  H04R1/00 ,  H04R7/16

Abstract: A transducer includes an acoustic radiating member for generating acoustic energy in a transmitting medium and a driver member that is pivotally connected to the radiating member. The driver member is for urging movement of the radiating member, wherein such movement generates the energy. Pivoting of the driver member with respect to the radiating member relieves predetermined stress in the driver member. The radiating member may include, for example, a flat element such as a bar, plate or disk, or an I-shaped element. The driver element may include an electroactive material. The driver element may be connected to the radiating element by support apparatus that is fixedly coupled to the radiating element includes a screw having a predeterminedly contoured end that engages a complimentarily contoured recess connected to the driver element for permitting the pivoting. When the support apparatus includes a screw it may be adjusted for supplying a predetermined force on the driver element.