A data link (101) for a MIMO communication system (100) comprises a first transceiver device (106A) comprising a body (109A) having a transducer mounting surface near or at which is mounted a plurality of first transducers (107A-107D) configured to, in use, receive and convert a plurality of electrical waveforms to a respective plurality of acoustic signals. A first bonding layer (120A) bonds a barrier mounting surface of the body of the first transceiver device to a barrier (103). The data link further comprises a second transceiver device (106B) comprising a body (109B) and a plurality of second transducers (107′A-107′D) configured to receive and convert the plurality of acoustic signals transmitted through the barrier to a respective plurality of electrical waveforms. A second bonding layer (120B) bonds a barrier mounting surface of the body of the second transceiver to the barrier.

An ultrasonic transducer is disclosed. The transducer includes a wear cap and an active element. The wear cap includes at least one slot arranged so as to define a strip. The strip is arranged to be in vibrational communication with the active element. The ultrasonic transducer may include a rigid block. The active element may be interposed between the wear cap and the rigid block, and the rigid block may be configured to provide a backing mass for the active element. Optionally, the rigid block may include chamfered edges.

A sound source for acoustic communication, navigation, and networking of an underwater glider may include a cylindrical body, a rigid front section disposed anteriorly to the cylindrical body, a plurality of metal rods, a resonant pipe surrounding the rods, and a rod-mounted piezo-ceramic transducer disposed between the body and the front section. Each rod may be attached at a first end to an anterior portion of the body and at a second end to a posterior portion of the front section. The pipe may be disposed between the body and the front section. The transducer may be disposed within the pipe. A posterior end of the pipe may be separated from the anterior portion of the body by a first orifice, and an anterior end of the pipe may be separated from the posterior portion of the front section by a second orifice.

A method for effectively cleaning vias (20034), trenches (20036) or recessed areas on a substrate (20010) using an ultra/mega sonic device (1003, 3003, 16062, 17072), comprising: applying liquid (1032) into a space between a substrate (20010) and an ultra/mega sonic device (1003, 3003, 16062, 17072); setting an ultra/mega sonic power supply at frequency f.sub.1 and power P.sub.1 to drive said ultra/mega sonic device (1003, 3003, 16062, 17072); after the ratio of total bubbles volume to volume inside vias (20034), trenches (20036) or recessed areas on the substrate (20010) increasing to a first set value, setting said ultra/mega sonic power supply at frequency f.sub.2 and power P.sub.2 to drive said ultra/mega sonic device (1003, 3003, 16062, 17072); after the ratio of total bubbles volume to volume inside the vias (20034), trenches (20036) or recessed areas reducing to a second set value, setting said ultra/mega sonic power supply at frequency f.sub.1 and power P.sub.1 again; repeating above steps till the substrate (20010) being cleaned.

Provided is a vibration wave motor including: a vibrator; a pressurizing member configured to pressurize the vibrator against a friction member; a holding member configured to hold the vibrator; and a buffering member provided between the vibrator and the holding member. The vibrator and the friction member are moved relatively to each other in a relative movement direction by vibration of the vibrator, and the holding member holds the vibrator in such a manner that an extending part extending in a pressurizing direction of the pressurizing member sandwiches the vibrator and the buffering member.

A fluid device includes: a first flow path that extends along a first axis and through which a fluid flows in a positive side of the first axis; a first ultrasonic element configured to generate a first standing wave along a second axis orthogonal to the first axis in the first flow path; and a second flow path connected to the first flow path such that the fluid flows therethrough and extending along a third axis intersecting a plane including the first axis and the second axis. A first connection port for connecting the first flow path and the second flow path is formed corresponding to a position of either an antinode of the first standing wave or a node of a first standing wave.

The present disclosure relates to a Sonar device (1) for detection of underwater objects. The sonar device (1) comprises a body element (2) comprising a piezo electric element (3). The sonar device further comprises a holder (4) adapted to hold the piezo electric element (3). The holder (4) is arranged to centre the piezo electric element (3) within said body element (2). The holder (4) is arranged such that the piezo electric element (3) is held firmly in place and also provide for that detection can be made omni-directionally. A method for manufacturing a holder (4) and a sonar device (1) is also disclosed.

An aerosol generating device includes an aerosol generator and a plug. The aerosol generator includes a container and an atomizing module arranged in the container. The container has a liquid chamber, an aerosol chamber, and an insertion slot defining an insertion direction. The liquid chamber and the aerosol chamber are respectively arranged at two opposite sides of the atomizing module, and are in spatial communication with each other through the atomizing module. The atomizing module includes two electrode regions having the same polarity and being electrically connected to each other. The plug is detachably inserted into the insertion slot of the container along the insertion direction, and a conductive terminal of the plug contacts the two electrode regions.

A flexible ultrasonic transducer comprising a flexible metal plate, a piezoelectric ceramics element, a first electrical conductor and an insulation covering a portion of the metal plate. The metal plate comprises a first and a second outer surface opposite each other. The piezoelectric ceramics element is attached to the first outer surface, a first portion of the first outer surface is not covered with the piezoelectric ceramics element, and the first electrical conductor is attached to a first portion of the second outer surface or the first portion of the first outer surface. The first portion of the first outer surface and the first portion of the second outer surface have similar dimensions and positions and the insulation covering covers the first portion of the first outer surface so that the piezoelectric ceramics element is directly dry coupled an object to be inspected by means of the transducer.

A vibration device includes a substrate having a first surface and a second surface at an opposite side to the first surface, a vibration element disposed on the first surface, a first through electrode which penetrates the substrate, and is configured to electrically couple the power supply interconnection disposed on the second surface and the first circuit block disposed on the first surface, and a second through electrode which penetrates the substrate, and is configured to electrically couple the power supply interconnection and the second circuit block including an analog circuit disposed on the first circuit, wherein R1>R4 and R2>R4, in which R1 is an electric resistance of the first through electrode, R2 is an electric resistance of the second through electrode, and R4 is an electric resistance of a zone of the power supply interconnection coupling the first through electrode and the second through electrode.