A loudspeaker system composed of a flexible panel with an affixed array of force actuators, a signal processing system, and interface electronic circuits is described. The system described is capable of creating a pattern of standing bending waves at any location on the panel and the instantaneous amplitude, velocity, or acceleration of the standing waves can be controlled by an audio signal to create localized acoustic sources at the selected locations in the plane of the panel.

A panel loudspeaker controller for controlling a panel loudspeaker including a plurality of actuators, the panel loudspeaker controller including a plurality of electrical signal inputs, each input being associated with each actuator of the panel loudspeaker to be controlled; a plurality of signal processors, each signal processor being associated with each input and having an output for an electrical signal to control an actuator of the panel loudspeaker, and each signal processor implementing a transfer function from its input to its output based on each actuator of the panel loudspeaker to a desired acoustic receiver; and a signal processor controller associated with all of the plurality of signal processors, wherein the signal processor controller is preconfigured to improve phase alignment between the signals as an ensemble output at the outputs of the signal processors.

Disclosed is an ultrasound probe wherein a backing having built-in lead arrays is disposed on the rear surface side of a transducer array, and backing terminal arrays connected to the lead arrays are provided on the lower surface of the backing. A relay substrate is provided between the backing and an electronic substrate. The relay substrate is provided with electrode section arrays corresponding to the backing terminal arrays. An electrode section includes: a substrate terminal connected to a backing terminal; a via for substrate internal wiring, said via being formed at a position shifted from the substrate terminal; and a conducting path that connects the substrate terminal and the via to each other. The electrode section arrays include a transmission electrode section array, and a reception electrode section array. The shift direction of the transmission electrode section array and that of the reception electrode section array are different from each other.

The present disclosure application relates to a transducer, a loudspeaker, and an acoustic output device. The transducer comprises: a magnetic circuit system, including a magnet assembly and a magnetic conductive cover, the magnetic conductive cover being arranged at least partially around the magnet assembly; and a vibration plate, including a first vibration plate and a second vibration plate, the first vibration plate and the second vibration plate being respectively distributed on both sides of the magnet assembly along a vibration direction of the magnet assembly, and being used to elastically support the magnet assembly within the magnetic conductive cover, wherein a resonance peak frequency of the transducer is less than 300 Hz.

A transducer comprises two piezoelectric layers attached to a substrate, two protective layers, two masses, and two stiffeners arranged at the ends of the bimorph. The transducer is made using a composite bagging process and autoclave curing. The transducer is attached to a flat panel using a parallelogram-shaped double-sided tape to form a loudspeaker or a display panel with haptic feedback. The improved transducer enables a full-range flat panel speaker with uniform frequency response over its operating frequency.

An apparatus includes an actuator configured to generate vibrations. The actuator includes a substantially planar piezoelectric oscillator having a central portion substantially surrounding and in mechanical communication with a coupling portion and a peripheral portion spaced from the coupling portion. The piezoelectric oscillator is configured to undergo bending oscillations in response to received electric voltage signals. The actuator further includes at least one mass configured to move in response to the bending oscillations of the piezoelectric oscillator. The actuator further includes at least one coupler configured to allow expansion and contraction of the peripheral portion along a first direction substantially parallel to the piezoelectric oscillator and to inhibit movement of the peripheral portion relative to the at least one mass along a second direction substantially perpendicular to the piezoelectric oscillator.

Sufficient sound pressure is obtained in the mid-low range, to provide a SoT module 100 which can be applied to a variety of applications. A SoT module 100 comprises a plate-shaped piezoelectric composite 105 for generating bending vibration by the impression of an AC voltage, a plurality of elastic bodies, one ends of which are bonded to the main surface of the piezoelectric composite 105, the elastic bodies 120a and 120b transmitting vibration of the piezoelectric composite 105 and a vibration plate 130 has a main surface which is bonded to the other ends of the elastic bodies 120a and 120b, wherein the piezoelectric composite 105 comprises piezoelectric elements 110a, 110b formed in a rectangular plate, and there is a position of the centroid of the piezoelectric composite 105 between the plurality of elastic bodies 120a and 120b.

A transducer comprises two piezoelectric layers attached to a substrate, two protective layers, two masses, and two stiffeners arranged at the ends of the bimorph. The transducer is made using a composite bagging process and autoclave curing. The transducer is attached to a flat panel using a parallelogram-shaped double-sided tape to form a loudspeaker or a display panel with haptic feedback. The improved transducer enables a full-range flat panel speaker with uniform frequency response over its operating frequency.

Sufficient sound pressure is obtained in the mid-low range, to provide a SoT module 100 which can be applied to a variety of applications. A SoT module 100 comprises a plate-shaped piezoelectric composite 105 for generating bending vibration by the impression of an AC voltage, a plurality of elastic bodies, one ends of which are bonded to the main surface of the piezoelectric composite 105, the elastic bodies 120a and 120b transmitting vibration of the piezoelectric composite 105 and a vibration plate 130 has a main surface which is bonded to the other ends of the elastic bodies 120a and 120b, wherein the piezoelectric composite 105 comprises piezoelectric elements 110a 110b formed in a rectangular plate, and there is a position of the centroid of the piezoelectric composite 105 between the plurality of elastic bodies 120a and 120b.

An audio accessory comprising one or more speaker units may be used to provide audio output for a media device such as a tablet computer, smartphone, and so forth. The speaker units may be affixed to various surfaces, such as an acoustic panel which serves as a portion of a cover for the media device. The acoustic panel may act as an acoustic radiator which is driven by one or more of the speaker units. When not in use, a pair of the speaker units may be joined together for compact storage.