The invention relates to an ultrasonic transducer (10) of the type comprising a housing (16) provided with an electrical connector (17), at least one ultrasonic transducer (15) and an electronic card (13) for controlling the transducer and which is arranged inside the housing and consists of a printed circuit board (14) on which active components (11) and passive components (12) are mounted. According to the invention, the active components include integrated active components (11) which are completely embedded in a substrate of the printed circuit board and the passive components include integrated passive components (12) which are completely embedded in the substrate. According to another feature, the active components and the passive components include surface-mounted components (7) arranged solely on one side of the printed circuit board and the transducer is mounted on an opposite side.

A method includes: an arrangement step of arranging a phased array probe including a plurality of oscillators each of which is capable of emitting ultrasonic waves on an end surface of the rotor disc, in a parallel state in which the plurality of oscillators are arranged along a circumferential direction of the rotor disc; a first transmission step of emitting ultrasonic waves from the plurality of oscillators in the parallel state, while a timing of emitting the ultrasonic waves from each of the oscillators is controlled in a first emission pattern, and receiving reflection waves of the ultrasonic waves; and a second transmission step of emitting ultrasonic waves from the plurality of oscillators in the parallel state, while the timing of emitting the ultrasonic waves from each of the oscillators is controlled in a second emission pattern different from the first emission pattern, and receiving reflection waves of the ultrasonic waves.

A sonic device in an embodiment includes a sonic transducer unit and a sonic propagation unit. The sonic transducer unit performs at least one of transmitting and receiving a sonic wave, and has a sonic function surface to configure at least one of a wave transmitting surface and a wave receiving surface. The sonic propagation unit includes: a substrate having a pair of electrodes; an electroadhesive element expressing body including a resin crosslinked body arranged on the substrate, and particles dispersed in the resin crosslinked body; and a power supply to apply voltage to the pair of electrodes. The sonic propagation unit is provided on the sonic function surface of the sonic transducer unit, and the electroadhesive element expressing body in the sonic propagation unit comes into contact with a test object.

A marine multibeam sonar device comprises a processing element and a transmitter. The processing element generates a plurality of transmit transducer electronic signals and inverts a polarity of a first portion of the transmit transducer electronic signals. The transmitter is in communication with the processing element and includes a plurality of transmit electronic circuits and a plurality of transmit transducers. Each transmit electronic circuit receives and processes one of the transmit transducer electronic signals, wherein a first portion of the circuits re-inverts the polarity of the first portion of the transmit transducer electronic signals. The transmit transducers receive the processed transmit transducer electronic signals from the transmit electronic circuits and generate a sonar beam.

A display apparatus includes a display panel configured to display an image, a supporting member configured to support the display panel, at least one sound generating device in the display panel, to the at least one sound generating device being configured to vibrate the display panel to generate sound, and a connection member at a lower portion of the supporting member to correspond to a center of the at least one sound generating device.

An ultrasonic probe assembly includes an ultrasonic probe having a housing, an ultrasonic sensor, at least one magnet, and rotatable joint portions. The housing extends along a longitudinal axis between first and second ends and includes a base surface. The sensor is secured adjacent a housing base surface configured to emit ultrasonic signals and receive ultrasonic echoes reflected from a target. The magnet is secured within the housing and configured to apply a magnetic force urging the base surface into contact with a surface of the target. The magnetic force frictionally maintains the housing at a stationary position with respect to the target surface. A first rotatable joint portion is positioned on a first lateral side of the housing. A second rotatable joint portion is positioned on a second lateral side of the housing, opposite the first lateral side.

A method for cooling a transducer of a probe for generating ultrasonic waves, the transducer exhibiting, at the front, a face (4) for emitting ultrasonic waves, and at the rear, a rear face (5), at least the emitting face partially delimiting a cooling chamber (11) wherein a cooling fluid circulates between at least an inlet (15) and at least an outlet (16), the inlet (15) being located at the periphery of the emitting face (4) whereas the outlet (16) is located in the central part of said emitting face. The method includes creating between the inlet (15) and the outlet (16), a circulation of cooling fluid according to a swirling inside the cooling chamber around the axis of acoustic propagation (A).

An ultrasonic device, the device comprising at least one flexible ultrasonic transducer; and a clamp configured to mount the at least one transducer to a test object. Optionally, the clamp may comprise one or more bands and wherein the one or more bands can optionally be metal or at least part of the one or more bands may be formed of a conformable material such that the one or more bands comprises a conformable band or band portion.

A piezoelectric cell support for an ultrasonic transducer, the support including a front face having formed thereon: a first shoulder that defines a bearing surface and a bottom of a central cavity surrounded by the bearing surface, the bearing surface being suitable for having a piezoelectric cell placed thereon; retention device(s) for holding the piezoelectric cell on the bearing surface and for positioning it angularly; and a rear face having a sloping surface that gives a top portion of the support a first thickness that is less than a second thickness of a bottom portion of the support.

A transducer (140) having a mechanical impedance over an operative frequency range and having a desired power coupling (145) to a load over the operative frequency range comprises a piezoelectric device (141) having a frequency distribution of modes in the operative frequency range; and an overmould (143). The overmould (143) is arranged to surround at least part of the piezoelectric device (141); and the parameters of the overmould (143) are selected to provide a required impedance matching between the mechanical impedance of the transducer (140) and the mechanical impedance of the load. An alternative transducer comprises a mounting means for holding a discrete portion of at least a part of the periphery of the piezoelectric device wherein the parameters of the mounting means are selected to provide a required boundary condition for the periphery of the piezoelectric device whereby the desired power coupling between the transducer and the load is provided.