An ultrasonic generator has a speaker element having a first resonance frequency and a speaker element having a second resonance frequency. The first resonance frequency and the second resonance frequency are adjacent resonance frequencies in the speaker. The distance between the elements is set so that the sound from the first speaker element and the sound from the second speaker element have a predetermined relationship at a target position. The target position is two or more positions on the object located in the target space. A predetermined relationship is a relationship in which a sound from the first speaker element and a sound from the second speaker element strengthen each other at an intermediate frequency between the first resonance frequency and the second resonance frequency.

An active acoustic system includes a thin-film sheet having an array of piezoelectric microstructures embossed in the film. Each piezoelectric microstructure may act as a speaker and/or a microphone. A control circuit is configured to individually address the piezoelectric microstructures to provide a separate voltage signal to, or receive a separate voltage signal from, each piezoelectric microstructure.

An ultrasonic unit manufacturing system and process are based on a universal ultrasonic generator unit that operates interchangeably with either one of piezoelectric and magnetostrictive ultrasonic devices, and optionally as well as with either on-off or power level control footswitches. The ultrasonic units use a generator unit having a detector that determines whether the connected device is piezoelectric or magnetostrictive, and activates the generator for the appropriate piezoelectric or magnetostrictive operating mode. The ultrasonic units so made and methods of using them are also disclosed.

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.

Embodiments of the present disclosure provide a flexible sensor, including a flexible substrate; a plurality of ultrasonic detectors, on the flexible substrate; and a plurality of detection circuits, respectively corresponding to the ultrasonic detectors; wherein each of the detection circuits is between the flexible substrate and the corresponding ultrasonic detector, and configured to drive the ultrasonic detector to emit an ultrasonic wave, and detect a detection signal output by the ultrasonic detector after receiving the ultrasonic wave; each of the ultrasonic detectors includes: a first electrode coupled to the corresponding detection circuit, a second electrode on a side of the first electrode away from the flexible substrate, and a piezoelectric induction layer between the first electrode and the second electrode; a plurality of holes are provided in a region other than a region where the detection circuits are located.

An ultrasound diagnostic apparatus and an ultrasonic probe are provided which are capable of reducing a leak current even in combined use of a low voltage transmission circuit and a high voltage transmission circuit including a buffer. The ultrasonic probe includes: a high voltage transmission circuit for transmitting a relatively high voltage; a low voltage transmission circuit for transmitting a relatively low voltage; and a transducer for selectively receiving a voltage transmitted from the high voltage transmission circuit and the low voltage transmission circuit. The high voltage transmission circuit includes: a current source for varying a current generated thereby and a current drawn thereby based on a set signal; a buffer for driving the transducer in accordance with the currents generated and drawn by the current source; and an impedance controller connected to an input terminal and an output terminal of the buffer.

An ultrasonic transducer device comprises a controller and a differential piezoelectric micromachined ultrasonic transducer with a membrane later, a bottom electrode layer, a piezoelectric layer, and a top electrode layer comprising a first electrode with a positive voltage to displacement coefficient and a second electrode with a negative voltage to displacement coefficient. During a first period, the controller electrically decouples a first output of a first driver from the first electrode, electrically decouples a second output of a second driver from the second electrode, and electrically couples the first and second electrodes to equalize charge between them. During a second period, the controller electrically decouples the first and second electrodes, electrically couples the first output with the first electrode, and electrically couples the second output with the second electrode; where waveforms on the first and second outputs during the second time period are out of phase with one another.

Disclosed are methods of obtaining zero vergence ultrasound waves for providing sonodynamic therapy with ultrasound waves. The method includes coupling a sonodynamic therapy device with an array of flat piezoelectric transducers to a skin surface. A controller is configured to generate an electrical drive signal at a frequency, modulate the drive signal, and drive the transducer with the modulated drive signal at the frequency to produce a zero vergence ultrasound wave to produce an average acoustic intensity sufficient to activate a sonosensitizer in a treatment region without damaging healthy cells in the treatment region.

A medical, particularly a dental or dental surgical, ultrasonic treatment device for generating ultrasonic vibrations and transmitting the ultrasonic vibration to a tool, which can be connected to the ultrasonic treatment device, the medical ultrasonic treatment device having: an ultrasonic vibration generator with a plurality of piezoelectric elements to which an electric voltage can be applied, and a circuit board to supply the plurality of piezoelectric elements with the electric voltage. Furthermore, a method for manufacturing a corresponding medical ultrasonic treatment device is described.

An electronic assembly includes a casing to conduct electricity flowing between at least some electronic components disposed within the casing. The electronic components include an ultrasonic transducer coupled to emit ultrasonic signals, and a battery to provide the electricity. A controller is coupled to the ultrasonic transducer and the battery, and the controller includes logic that when executed by the controller causes the electronic assembly to perform operations, including: instructing the ultrasonic transducer to emit the ultrasonic signals.