A method for providing a broadband constant beam pattern acoustic array includes providing an array of transducers in a known three dimensional axisymmetric spherical configuration with each transducer element having an associated signal. A user can specify a far field beam pattern for the array. Weightings are calculated for each transducer in the array as being proportional to the voltage that gives the beam pattern power level associated with the bearing for each transducer. Signal power levels for each transducer are modified in accordance with the weightings. The array can be operated for receiving and transmitting signals with a constant beam pattern over a broad range of frequencies.

A system to reduce surface bubbles from cell culture media using ultrasonic pulses is disclosed. The system includes a plurality of ultrasonic transducers, a photodetector, a camera, a control circuit, and a cell culture container that includes a cell culture media. The control circuit is communicatively coupled to the plurality of ultrasonic transducers, the temperature sensor, and the camera. The photodetector is used to determine a presence of a surface bubble on the cell culture media. The camera is used to determine a location of the surface bubble when the presence of the surface bubble is determined. The plurality of ultrasonic transducers is used to position an ultrasonic pulse at the location of the surface bubble and thereby reduce the presence of the surface bubble on the cell culture media when the location of the surface bubble is determined.

To provide a photoacoustic probe capable of acquiring subject information for reducing generation of artifacts without increasing the number of wires connected to the outside. Provided is a probe including a plurality of ultrasonic transducers, wherein the ultrasonic transducers are divided into a plurality of groups, two adjoining ultrasonic transducers belong to different groups, and the probe includes a group selection unit configured to switch signals of the ultrasonic transducers to be outputtable for each of the groups.

The invention relates to a matrix array of ultrasonic transducer elements (1) comprising a plurality of transducer elements (1) that are distributed over a distribution area, each of the transducer elements (1) being suitable for emitting, from an emission area (3), ultrasounds at a frequency comprised between 100 kHz and 100 MHz, wherein: each of the transducer elements (1) is configured to emit ultrasounds in a divergent manner at least at the level of the working volume; said transducer elements (1) each have a largest dimension of their emission area greater than 1.5 times the wavelength of the ultrasounds in water at 30 C.; the distribution of the transducer elements (1) over the distribution area of the array is aperiodic.

A multi-array ultrasound system for haptic engagement is provided. The system may include a computing device with a processing system, a tracking device communicatively coupled to the processing system, two or more ultrasound transducer arrays including a plurality of ultrasound transducers, and a driver communicatively coupled to the processing system and the two or more ultrasound transducer arrays.

An ultrasonic piezoelectric transducer device includes a transducer array consisting of an array of vibrating elements, and a base to which the array of vibrating elements in the transducer array are attached. The base include integrated electrical interconnects for carrying driving signals and sensed signals between the vibrating elements and an external control circuit. The base can be an ASIC wafer that includes integrated circuitry for controlling the driving and processing the sensed signals. The interconnects and control circuits in the base fit substantially within an area below the array of multiple vibrating elements.

A laundry appliance includes a drum that rotationally operates within a tub. A fluid delivery system selectively delivers wash fluid to the drum. A rotator rotationally operates within the drum. The rotator selectively operates independent of the drum and about a common rotational axis of the drum and the rotator. A sanitizing mechanism includes an ultrasonic transducer. The ultrasonic transducer selectively delivers waves of an ultrasonic frequency into an amount of the wash fluid disposed within the drum and the rotator. The ultrasonic frequency generates air bubbles and causes cavitation of the air bubbles that directs a micro jet of air through the wash fluid and into articles being processed within the drum.

The electroacoustic transducer (1) is configured for the generation of shock waves for the treatment of the human or animal body. The electroacoustic transducer (1) includes piezoelectric elements (5), which are arranged within a bearer (4) in a housing (2, 3). Between the piezoelectric elements (5) and the housing (2, 3) a free space is formed, which is in-filled with a casting compound (10).

A curved high intensity focused ultrasound (HIFU) transducer comprising a curved piezoelectric array having opposite convex and concave surfaces, the concave surface being a transmitting surface, and a plurality of acoustic transmission areas, a plurality of electrodes located on the surfaces of the curved piezoelectric array for applying electrical transmit signals to the acoustic transmission areas, and a unitary, continuously formed curved matching layer pre-formed to the desired curvature of the curved transducer array and bonded to the transmitting surface of the curved piezoelectric array which provides acoustic matching and electrical isolation for the transmitting surface of the curved piezoelectric array.

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.