A PMUT device includes a membrane element adapted to generate and receive ultrasonic waves by oscillating, about an equilibrium position, at a corresponding resonance frequency. A piezoelectric element is located over the membrane element along a first direction and configured to cause the membrane element to oscillate when electric signals are applied to the piezoelectric element, and generate electric signals in response to oscillations of the membrane element. A damper is configured to reduce free oscillations of the membrane element, and the damper includes a damper cavity surrounding the membrane element, and a polymeric member having at least a portion over the damper cavity along the first direction.

A PMUT device includes a membrane element extending perpendicularly to a first direction and configured to generate and receive ultrasonic waves by oscillating about an equilibrium position. At least two piezoelectric elements are included, with each one located over the membrane element along the first direction and configured to cause the membrane element to oscillate when electric signals are applied to the piezoelectric element, and generate electric signals in response to oscillations of the membrane element. The membrane element has a lobed shape along a plane perpendicular to the first direction, with the lobed shape including at least two lobes. The membrane element includes for each piezoelectric member a corresponding membrane portion including a corresponding lobe, with each piezoelectric member being located over its corresponding membrane portion.

An ultrasound transducer with at least one piezoelectric oscillator, a damping compound and at least one electrically conductive conducting element that is in contact with the piezoelectric oscillator. The damping compound in an ultrasound transducer encloses at least the at least one conducting element, and the composite structure of the at least one conducting element and of the damping compound is designed such that the composite structure is in contact over an area with the piezoelectric oscillator, and forms a support on the side of the ultrasound transducer that faces away from the piezoelectric oscillator on which the ultrasound transducer can be supported.

An ultrasound imaging device includes an ultrasound transducer module disposed within a housing and a flowable acoustic damping material disposed on at least one surface located within an interior of the housing. The flowable acoustic damping material may be a Teflon™-containing gel material, in contact with at least one internal surface of the imaging device to provide acoustic damping.

The present invention provides an operation device which is capable of efficiently transmitting vibrations. An operation device according to the present invention is provided with: a first structure that comprises a touch panel module, a first case in which the touch panel module is arranged, a first supporting body to which the first case is affixed, and a vibration actuator 10 which is arranged on the first supporting body; a second structure that comprises a second supporting body, which is connected to the first supporting body, a second case which is affixed to the second supporting body, and a circuit board which is arranged in the second case; and a vibration damping member that connects the first supporting body and the second supporting body to each other.

An ultrasound probe includes: an ultrasound transducer that includes a piezoelectric element configured to transmit and receive ultrasound waves to and from a subject; and an adjustment layer that is laminated on the piezoelectric element, the adjustment layer being provided with a cut surface that is cut by a blade configured to cut the piezoelectric element, the adjustment layer including an adjustment material configured to improve cutting performance of the blade.

A microelectromechanical membrane transducer includes: a supporting structure; a cavity formed in the supporting structure; a membrane coupled to the supporting structure so as to cover the cavity on one side; a cantilever damper, which is fixed to the supporting structure around the perimeter of the membrane and extends towards the inside of the membrane at a distance from the membrane; and a damper piezoelectric actuator set on the cantilever damper and configured so as to bend the cantilever damper towards the membrane in response to an electrical actuation signal.

A shock absorber including a shock absorber body substantially filled with a hydraulic fluid. The shock absorber includes a piston disposed within the shock absorber body that includes a piston head movable within the shock absorber to apply a pressure change in the hydraulic fluid. The shock absorber includes a piezoelectric material disposed within the shock absorber and in fluid communication with the hydraulic fluid. The piezoelectric material is configured to generate an electrical charge in response to the pressure change in the hydraulic fluid. The piezoelectric material is electrically connected to at least one battery configured to receive the electrical charge generated by the piezoelectric material.

A backing member includes a resin layer having a first surface, and a second surface opposite to the first surface, and a plurality of linear conductors, embedded in the resin layer, and penetrating the resin layer from the first surface to the second surface. Each of the plurality of linear conductors includes a metal material having an ultrasonic wave insulating property, and includes at least one bent portion or curved portion.

The present invention provides an operation device which is capable of efficiently transmitting vibrations. An operation device according to the present invention is provided with: a first structure that comprises a touch panel module, a first case in which the touch panel module is arranged, a first supporting body to which the first case is affixed, and a vibration actuator 10 which is arranged on the first supporting body; a second structure that comprises a second supporting body, which is connected to the first supporting body, a second case which is affixed to the second supporting body, and a circuit board which is arranged in the second case; and a vibration damping member that connects the first supporting body and the second supporting body to each other.