Electroacoustic device (5) for generating at least one acoustic wave (Fv,Vx), the device comprising a piezoelectric substrate (10) and first (15) and second (20) groups of electrodes (60,65,70,75) arranged on the substrate, each electrode of the first and second groups comprising a track (80.sub.a-f,85.sub.a-f,90.sub.a-d,95.sub.a-d), the tracks (90.sub.a-d,95.sub.a-d) of the electrodes of the first group spiralling around a same spiral axis (Z) along a first winding direction (W.sub.1), and the tracks (80.sub.a-f,85.sub.a-f) of the electrodes of the second group spiralling around said spiral axis along a second winding direction (W.sub.2) opposite to the first winding direction.

An ultrasonic radiator includes a plurality of plate-like elements, a supporter, and a first adhesive. The plurality of plate-like elements each have, on the front side or the back side, a radiation surface from which ultrasonic waves are emitted. The supporter holds the plurality of plate-like elements in such a manner that the respective radiation surfaces in different directional orientations are directed toward the same location. The plurality of plate-like elements are bonded to the supporter with the first adhesive. The plurality of plate-like elements each include a plurality of vibratory elements that are variously located in the radiation surface and that generate ultrasonic waves. The first adhesive is applied to lateral surfaces of each of the plurality of plate-like elements.

The invention relates to ultrasound imaging method and apparatus suitable for minimally invasive ultrasound diagnostic devices in cardiac ablation monitoring and in tumor ablation monitoring. The present invention proposes an assembly of forward and side-facing transducers and a system of embedded forward and side-facing transducers in apertures on surfaces of the assembly. This provides control of the acoustic properties of the transducer and improved ablation monitoring when the assembly is incorporated in a medical device.

A transducer includes first and second piezoelectric layers made of corresponding different first and second piezoelectric materials and three or more electrodes, implemented in two or more conductive electrode layers. The first piezoelectric layer is sandwiched between a first pair of electrodes and the second piezoelectric layer is sandwiched between a second pair of electrodes. The first and second pairs of electrodes contain no more than one electrode that is common to both pairs.

Provided is a conscious animal ultrasonic neural regulation device, including a pulse signal generation module, a transducer module and a fixing module. The pulse signal generation module is configured to generate a pulse signal with high energy. The ultrasonic transducer module is configured to convert the pulse signal into an ultrasound. The fixing module includes an upper fixing module and a lower fixing module. The upper fixing module is configured to fix the ultrasonic transducer module, and the lower fixing module is configured to be fixed on an animal neural regulation target point. The upper fixing module and the lower fixing module are connected by a connecting component. The conscious animal neural regulation device of the present disclosure can perform accurate ultrasonic stimulation on a cerebral cortex and subcortex of the animal, thereby exploring and verifying the stimulation effect of the ultrasound on the animal, which is easy in operation and convenient in use.

An acoustic, preferably ultrasonic, wave emission and/or reception device, including a wave emitter configured to transmit waves at an emission frequency, and a receiver of preferably ultrasonic waves, separate from the emitter, having a resonance frequency, and configured to receive waves generated by the emitter and including direct waves and reflected waves, wherein the device includes a resonance frequency modulator of the receiver and a control unit configured to control the resonance frequency modulator during a predetermined time period, so as to reduce the sensitivity of the receiver during the predetermined time period by moving the resonance frequency of the receiver away from the emission frequency of the emitter. The acoustic device relates to the field of ultrasonic sensors, particularly PMUTs or CMUTs, having a high quality factor.

An acoustic, preferably ultrasonic, wave emission and/or reception device, including a wave emitter configured to transmit waves at an emission frequency, and a receiver of preferably ultrasonic waves, separate from the emitter, having a resonance frequency, and configured to receive waves generated by the emitter and including direct waves and reflected waves, wherein the device includes a resonance frequency modulator of the receiver and a control unit configured to control the resonance frequency modulator during a predetermined time period, so as to reduce the sensitivity of the receiver during the predetermined time period by moving the resonance frequency of the receiver away from the emission frequency of the emitter. The acoustic device relates to the field of ultrasonic sensors, particularly PMUTs or CMUTs, having a high quality factor.

An intracellular delivery device (1) including, a piezoelectric substrate (3) having a working surface (8), at least one interdigitated transducer (5) located on and in contact with the working surface (8), and a receptacle (11) located on the working surface for accommodating cells to be targeted for intracellular delivery therein, wherein an alternating signal applied to the interdigitated transducer generates acoustic wave energy through the piezoelectric substrate that can be transferred to the accommodated cells.

An intracellular delivery device (1) including, a piezoelectric substrate (3) having a working surface (8), at least one interdigitated transducer (5) located on and in contact with the working surface (8), and a receptacle (11) located on the working surface for accommodating cells to be targeted for intracellular delivery therein, wherein an alternating signal applied to the interdigitated transducer generates acoustic wave energy through the piezoelectric substrate that can be transferred to the accommodated cells.

A sensor system for attachment to a casing includes at least one sensor element, where the sensor element is configured for detecting an environment property of an environment which, with the sensor system attached to the casing, is situated on the opposite side of the casing with respect to the sensor system. The sensor system also includes an encapsulation layer, where the sensor element is embedded in the encapsulation layer, and where the encapsulation layer has a contact surface for attaching the sensor system to the casing.