An acoustic transducer, in particular for an ultrasonic sensor, is proposed. The acoustic transducer has a functional group, the functional group encompassing a diaphragm cup and at least one electroacoustic transducer element. The acoustic transducer furthermore has a housing. The diaphragm cup encompasses a vibration-capable diaphragm and an encircling wall, as well as at least one electroacoustic transducer element, the transducer element being embodied to excite the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is constituted from a plastic material, the at least one transducer element being integrated into the vibration-capable diaphragm, the transducer element having an electrically active polymer.

A sound transducer, in particular, for an ultrasonic sensor, includes a functional group, the functional group including a diaphragm cup and at least one electroacoustic transducer element. The sound transducer also includes a housing. The diaphragm cup includes a vibratory diaphragm and a circumferential wall, and at least one electroacoustic transducer element, the transducer element being configured to stimulate the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is formed from a plastic material, the at least one transducer element being integrated into the vibratory diaphragm, in particular without an additional adhesive layer, the transducer element including a piezoceramic element.

A vibration device includes a light-transmissive body defining a cover that includes a detection region of an imaging element as an optical detection element, a tubular support body which includes an interior space that includes the imaging element and is connected to the light-transmissive body, a vibrating body which is coupled to the support body and vibrates the light-transmissive body with the support body provided therebetween, and a drive circuit which drives the vibrating body.

A piezoelectric micromachined ultrasonic transducer (PMUT) includes a substrate, a stopper, and a membrane, where the substrate and the stopper are composed of same single-crystalline material. The substrate has a cavity penetrating the substrate, and the stopper protrudes from a top surface of the substrate and surrounds the edge of the cavity. The membrane is disposed over the cavity and attached to the stopper.

The present disclosure provides an ultrasonic transducer and a focused ultrasound treatment device. The ultrasonic transducer includes a sound generation unit and a sound emitting surface, the sound emitting surface being a spherical surface having a first notch, a second notch and a third notch, wherein one great circle of a sphere corresponding to the sound emitting surface is a main great circle, the first notch and the second notch are respectively positioned at two intersections of the spherical surface and a diameter perpendicular to the main great circle, and the third notch connects the first notch with the second notch; each cross-section of the sound emitting surface parallel to the main great circle is in a shape of an arc; and the ultrasonic wave generated by the sound generation unit is focused on a center of the sphere corresponding to the sound emitting surface.

In an example, a system includes an ultrasonic transducer and a bracket coupled to the ultrasonic transducer. The system also includes a lens coupled to the bracket. The system includes a control circuit coupled to the ultrasonic transducer and configured to excite the ultrasonic transducer with a signal to clean the lens.

According to an embodiment, a device comprises: a piezoelectric element configured to convert an electrical voltage into a mechanical strain; and a conductive base plate onto which the piezoelectric element is fastened, wherein the conductive base plate comprises an integrated support positioned on an underside of the conductive base plate, wherein the conductive base plate is supported by the integrated support; wherein the device is configured to provide haptic feedback on a basis of the mechanical strain.

An ultrasonic stepping motor device for generating ultra-fine single droplet includes a valve housing, a valve core, and a spring. The valve core and the spring are installed inside the valve housing, and the valve core abuts against a liquid inlet of the valve housing under an elastic force of the spring. The valve housing is connected with a injector through a catheter, and the catheter is driven for linear operation by the inverse piezoelectric effect of piezoelectric ceramics through an ultrasonic linear motor. A right end of the catheter is equipped with a rubber piston, and the rubber piston is arranged in a cavity of the injector and matched with the injector. Since the piezoelectric vibrator driven catheter can produce nano feed length, and the volume of droplets overflowed each time can reach micron level, which can meet the requirements of producing micro droplets.

A vibration device includes a piezoelectric element and a vibration member. The vibration device is arranged to be supported on a base. The vibration member includes a first main surface opposing the base and a second main surface opposing the first main surface. The piezoelectric element is disposed on the second main surface. The first main surface of the vibration member is provided with a protrusion contacting the base and defining a vibration space on the first main surface. The protrusion is positioned outside the piezoelectric element to surround the piezoelectric element when the vibration member is seen through from a direction orthogonal to the first main surface.

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.