State switched acoustic transducer

Details State switched acoustic transducer State switched acoustic transducer

1996-11-07

1999-02-02

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367162, 367176, 367157, 310322, 310334, H04R 1700

Patent

active

058674500

ABSTRACT:
A state switched acoustic has a stiffness element having a zero potential energy state and a plurality of controllable stiffness states. A mass is coupled to the stiffness element so that the stiffness element and the mass are capable of resonating at a resonant frequency. A system changes the stiffness state of the stiffness element from a first stiffness state to a second stiffness state while the mass is in motion and stiffness element is in a zero potential energy state so as to change the resonant frequency of the transducer. In a method of changing resonant frequency of a mechanical system, a parameter of the system is dynamically changed while the system is in an energy state that will allow changing the resonance parameter without disrupting the resonance of the system.

REFERENCES:
patent: 4168485 (1979-09-01), Payton et al.
patent: 4295213 (1981-10-01), Mifsud
patent: 4752918 (1988-06-01), Boucher et al.
patent: 5166907 (1992-11-01), Newnham et al.
patent: 5316565 (1994-05-01), Brosow

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