Abstract: The invention relates to audio transducers, such as loudspeaker, microphones and the like, and includes improvements in or relating to: audio transducer diaphragm structures and assemblies, audio transducer mounting systems; audio transducer diaphragm suspension systems, personal audio devices incorporating the same and any combination thereof. The embodiments of the invention include linear action and rotational action transducers. For both types of transducer, rigid and composite diaphragm constructions and unsupported diaphragm periphery designs are described. Systems and methods for mounting the transducer to a housing, such as an enclosure or baffle are also described. Furthermore, hinge systems including: rigid contact hinge systems and flexible hinge systems are also disclosed for various rotational action transducer embodiments.

Abstract: Aspects of the subject technology relate to a device comprising a moving-coil speaker including a diaphragm to play low-frequency signals from an audio-signal source, and a piezoelectric transducer coupled to the diaphragm to play high-frequency signals from the audio-signal source. A coupler couples the diaphragm to a housing of the device.

Abstract: A piezoelectric speaker (10) includes: a piezoelectric film (35); a fixing face (17) for fixing the piezoelectric film (35) to a support; and an interposed layer (40) disposed between the piezoelectric film (35) and the fixing face (17). The interposed layer (40) has a holding degree of 5×108 N/m3 or less.

Abstract: A display apparatus including a flexible vibration module and a method of manufacturing the flexible vibration module are provided. A display apparatus includes: a display panel configured to display an image, and a flexible vibration module on a rear surface of the display panel, the flexible vibration module configured to vibrate the display panel, the flexible vibration module including: a plurality of first portions having a piezoelectric characteristic, and a plurality of second portions respectively between pairs of the plurality of first portions, the plurality of second portions having flexibility.

Abstract: A micrometric speaker includes a frame, an electromechanical transducer, and a mechanical-acoustic transducer comprising a rigid plate movably mounted in the frame. The electromechanical transducer comprises two piezoelectric actuators and two elastic strips. The frame comprises a central crossmember from which the two strips extend until engaging two lateral coupling edges of the mechanical-acoustic transducer, and the mechanical-acoustic transducer comprises two linearising springs each extending from one of the lateral edges to the rigid plate, to enable, during a deformation of the strips, a movement of the two lateral edges to the central crossmember and reduce the longitudinal constraints applied to the strips during their deformation due to their “recessed-guided” bending configuration.

Abstract: A sound apparatus includes a piezoelectric device, a vibration member connected to the piezoelectric device, a first magnet connected to the piezoelectric device, and a second magnet facing the first magnet, which can readily realize a desired frequency characteristic.

Abstract: A sound treatment system includes an audio system for transmitting tones of predetermined frequencies through a plurality of outputs. A sound transmitting device is electrically connectable to one or more of the outputs, and includes a speaker for transmitting the tones received. The speaker is adjacent to crystal which is vibrationally responsive to the tones. A method of using the system includes generating tonal segments of predetermined duration, modulating the frequencies, and compiling these into an audio program. One or more sound transmitting devices are placed on desired locations of the body, and their inputs connected to corresponding outputs of the audio system. The generating step includes compiling selected predetermined frequencies into an audio program to generate the tonal segments, as well as modulating tones of one or more desired frequencies to generate the tonal segments.

Abstract: A multilayer piezoelectric ceramic is constituted by: piezoelectric ceramic layers which do not contain lead as a constituent element, have a perovskite compound expressed by the composition formula LixNayK1?x?yNbO3 (where 0.02<x?0.1, 0.02<x+y?1) as the primary component, and contain 0.2 to 3.0 mol of Li relative to 100 mol of the primary component; and internal electrode layers which are constituted by a metal that contains silver by 80 percent by mass or more; wherein the multilayer piezoelectric ceramic is such that Li compounds other than the primary component are localized therein. The multilayer piezoelectric element can offer excellent insulating property.

Abstract: Aspects of the subject technology relate to a device comprising a moving-coil speaker including a diaphragm to play low-frequency signals from an audio-signal source, and a piezoelectric transducer coupled to the diaphragm to play high-frequency signals from the audio-signal source. A coupler couples the diaphragm to a housing of the device.

Abstract: A flat speaker includes a plurality of horizontal frames provided on a substrate and dividing the substrate into a plurality of rows, a plurality of vertical frames provided on the substrate and dividing each of the plurality of rows into a plurality of columns, a plurality of piezoelectric elements provided on each side of the plurality of vertical frames and configured to contract and expand according to a voltage signal, a plurality of electrodes configured to apply the voltage signal to the piezoelectric elements, and a controller configured to control the voltage signal applied to the plurality of electrodes.

Abstract: A piezoelectric device including a flow path forming substrate in which pressure chambers are formed, a diaphragm, and piezoelectric actuators. Active portions, each having a piezoelectric layer interposed between a first electrode and a second electrode, are each, in plan view, provided from an edge portion opposing the pressure chamber to a portion outside the pressure chamber, and a ratio of a film thickness of the piezoelectric layer to a film thickness of the diaphragm is 4.7 or less.

Abstract: The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

Abstract: An electronic component module including a fixing part, a function part housed in, or fixed to, the fixing part, at least one connection line, and at least one protrusion on the function part or the fixing part. The fixing part includes an abutting face, an outer face extending from an end of the abutting face in a direction including a component of a first direction, and an edge line along which the abutting and outer faces meet. The connection line is flexible, electrically connected to the function part, positioned on a second direction side relative to the abutting face, and configured to be led out in a third direction from an inside to an outside relative to the edge line. The protrusion extends at least partly in the third direction and is positioned at least partly on the first direction side relative to the connection line in the led-out state.

Abstract: A MEMS microphone and a manufacturing method thereof are provided. The MEMS microphone includes: a substrate configured to have a through portion formed in a central portion thereof; a vibration membrane configured to have an uneven structure formed on the through portion of the substrate; and a fixed membrane provided on an upper position spaced apart from the vibration membrane by a predetermined distance.

Abstract: A grill cover that fits over or is positioned over high frequency acoustical regions and low frequency acoustical regions of a playback device. A portion of the grill cover that fits over or is positioned over a high frequency acoustical region has small area openings and a portion of the grill over a low frequency acoustical region has large area openings. In portions of the grill cover between the portions over high and low frequency acoustical regions, the openings may have an intermediate area to visually blur the differences between the portions of the grill covers. To further blur the differences, the differently sized openings may be interleaved.

Abstract: It is provided a steering wheel for a motor vehicle having a steering-wheel frame and at least one element for setting the vibration frequency and/or the inertia of the steering wheel. The at least one element is electrically conductive and is part of a sensor element.

Abstract: A piezoelectric speaker fits in a cavity of a portable information handling system covered by a transparent cover that defines a speaker chamber within the cavity. The transparent cover integrates wirelines that align power pads with power contacts of the speaker to communicate audible information that generates sounds. In one embodiment, the transparent cover integrates a liquid crystal display that presents visual images associated with generated sound and backlit with illumination provided from the cavity.

Abstract: A display apparatus includes: a display module including a display panel configured to display an image, a vibration plate on a rear surface of the display module, a connection member between the rear surface of the display module and the vibration plate, at least one vibration module on the vibration plate, and an enclosure between the display module and the vibration plate, the enclosure being spaced apart from the vibration module, the enclosure surrounding the vibration module.

Abstract: A filter having a pass band includes a series circuit in which a series arm resonator and a first inductor are connected in series with each other and which forms at least part of a signal path R connecting a first input/output terminal and a second input/output terminal and a parallel arm resonator connected between one end of the series circuit and a ground. The series circuit becomes inductive in the pass band. An anti-resonant frequency of the series arm resonator is higher than a frequency at a higher-frequency end of the pass band. A resonant frequency of the parallel arm resonator is higher than the anti-resonant frequency of the series arm resonator.

Abstract: A method applied in a driving circuit is disclosed. The driving circuit is coupled between a voltage source and a load and configured to drive the load. The method includes: forming, by the driving circuit, a first current from the voltage source to the load; and forming, by the driving circuit, a second current from the load back to the voltage source.

Abstract: The present invention relates to a hybrid speaker, having a high-frequency tweeter and a low-frequency woofer formed on the same axis, for improving sound quality by separately emitting a high-frequency sound generated by the high-frequency tweeter and a low-frequency sound generated by the low-frequency woofer. A device according to the present invention comprises: a woofer part for generating a low-frequency sound; a tweeter part for generating a high-frequency sound; a substrate for supplying an electrical signal to coils of the woofer part and the tweeter part; a lower frame for accommodating constituent components on the same axis; and an upper frame coupled to the lower frame to form a speaker housing, and separately having a low-frequency sound emission port for emitting the low-frequency sound of the woofer part and a high-frequency sound emission port for emitting the high-frequency sound of the tweeter part.

Abstract: The present invention provides a sound generating device, including a housing and a vibration system accommodated in the housing, the vibration system including a diaphragm and a driving unit for driving the diaphragm to vibrate and generate sound. The driving unit includes a piezoelectric driving unit and a moving iron driving unit coupled in parallel with the piezoelectric driving unit, the piezoelectric driving unit including a piezoelectric sheet, the moving iron driving unit including a coil and a magnetic steel. The piezoelectric driving unit and the moving iron driving unit jointly drive the diaphragm to vibrate and sound.

Abstract: A piezoelectric thin film resonator includes: a substrate; a piezoelectric film located on the substrate and including a penetration hole penetrating therethrough; a lower electrode and an upper electrode facing each other across at least a part of the piezoelectric film; and a protective film covering an upper surface of the piezoelectric film, a side surface of the piezoelectric film, and an inner surface of the penetration hole.

Abstract: A display apparatus includes: a display panel configured to be rolled or unrolled, at least one vibration module on a rear surface of the display panel, the at least one vibration module being configured to: be rolled or unrolled with the display panel, and vibrate the display panel, and a partition on the rear surface of the display panel, the partition being spaced apart from and surrounding the at least one vibration module, wherein the at least one vibration module includes: a plurality of first portions having a piezoelectric property, and a plurality of second portions between the plurality of first portions, the plurality of second portions having flexibility.

Abstract: A sound producing device includes a base and at least one chip disposed on the base. The chip includes at least one membrane and at least one actuator. The membrane includes a coupling plate and at least one spring structure connected to the coupling plate. The actuator is configured to receive a driving signal corresponding to an input audio signal to actuate the membrane, and the input audio signal and the driving signal have an input audio band which has an upper bound at a maximum frequency. The spring structure is situated between the coupling plate and the actuator. The membrane has a first resonance frequency higher than the maximum frequency.

Abstract: A display device includes: a display panel including a first substrate and a light emitting element layer disposed on the first substrate; and a sound generator disposed on one surface of the first substrate, where the sound generator vibrates the display panel to output a sound. The sound generator includes: a first vibration generator which vibrates the display panel by generating a magnetic force using a first voice coil therein; and a second vibration generator including a vibration layer which contracts or expands based on a voltage applied thereto to vibrate the display panel, where the first vibration generator and the second vibration generator overlap each other in a thickness direction of the display panel.

Abstract: A vibration generating device includes an electroactive layer having a first surface and a second surface opposite to the first surface, and including an unevenness structure; and a first electrode and a second electrode on at least one of the first surface and the second surface of the electroactive layer, wherein one or more of the first electrode and the second electrode covers an entire surface of at least one or more of the first surface and the second surface of the electroactive layer including the unevenness structure.

Abstract: Provided is a bulk acoustic wave resonator (BAWR). The BAWR may include an air cavity disposed on a substrate, a bulk acoustic wave resonant unit including a piezoelectric layer, and a reflective layer to reflect a wave of a resonant frequency that is generated from the piezoelectric layer.

Abstract: An ultrasonic device unit includes an ultrasonic device having a device-side terminal, a reinforcing plate having a support adapted to support the ultrasonic device, and a flexible printed wiring board to be connected to the ultrasonic device, the flexible printed wiring board is provided with a connection to be connected to the device-side terminal, and a bend continuous with the connection, extending away from the ultrasonic device, and having an end edge parallel to an extending direction, and the reinforcing plate is provided with a bending guide provided to a first side parallel to a first direction crossing the extending direction, having a circular arc curved surface convex away from the support, and opposed to the bend, and a guide surface disposed at an end in the first direction of the bending guide, and adapted to guide the end edge of the bend.

Abstract: An ultrasonic device unit includes an ultrasonic device having a device-side terminal, a reinforcing plate having a support surface adapted to support the ultrasonic device, and a flexible printed wiring board to be connected to the ultrasonic device, the flexible printed wiring board includes a connection to be connected to the device-side terminal, a bend continuous with the connection, and extending away from the ultrasonic device, and an outer edge disposed in an end in the extending direction of the bend, and the reinforcing plate is provided with a first side parallel to a first direction crossing the extending direction, and opposed to the bend, and a projection on a reverse surface opposite the support surface, and with which the outer edge has contact when the flexible printed wiring board is curved along the first side in the bend.

Abstract: A speaker includes a circuit board, a peripheral wall, a diaphragm, at least one support member and at least one piezoelectric actuator. The peripheral wall is located on a surface of the circuit board. The diaphragm has an outer boundary attached to the peripheral wall. The diaphragm, the peripheral wall and the circuit board collectively form a chamber. The at least one support member protrudes from the surface of the circuit board and is located within the chamber. The at least one piezoelectric actuator is located on a top of the at least one support member and electrically driven to cause a vibration of the diaphragm under applied electrical bias.

Abstract: The present invention is directed to a headphone or an earpiece that includes a cushion that advantageously allows for improved comfort, sound quality, and stability in the ear. The cushion includes an inner cavity, an ear-canal aperture and a tip portion, wherein the inner cavity of the cushion accommodates a nozzle portion of a housing within the cavity, and the axis of the inner cavity is substantially parallel to the first axis, wherein the ear-canal aperture opens toward the ear canal of the user's ear when the headphone or the earpiece is worn by the user, and wherein the tip portion engages the concha of the user's ear when the headphone or the earpiece is worn by the user, and the axis of the tip portion is not parallel to the first axis. The headphone or the earpiece includes dual acoustic elements to amplify sounds in different frequency ranges.

Abstract: In an embodiment an apparatus includes a display panel and a speaker module. The panel has a display layer for displaying images and defines a plurality of apertures penetrating through at least the display layer. The speaker module includes a diaphragm arranged substantially parallel to the display layer. Sound from the speaker diaphragm is directed outside a device through the apertures and the display layer is configured for displaying at least one virtual image in relation to generated sound waves wherein the display panel is acoustically transparent.

Abstract: The present disclosure relates to a multi-function transducer assembly and system comprising a multi-function transducer assembly, a method of manufacturing the assembly and a method of controlling the system. The assembly includes a piezoelectric transducer layer and spaced first terminals electrically attached to the piezoelectric transducer layer. The spaced first terminals are arranged for supplying an audio frequency signal to the piezoelectric transducer layer so that the assembly can function as a speaker. Second terminals are arranged for receiving at least one signal from the piezoelectric transducer layer or supplying at least one signal to the piezoelectric transducer layer. The second terminals are electrically attached to a region of the piezoelectric transducer layer between the spaced first terminals.

Abstract: Disclosed is a display apparatus including a display panel configured to display an image by emitting light, a rear surface structure configured to surround lateral and rear surfaces of the display panel, a vibration generating device connected with the rear surface structure and configured to vibrate the display panel, a rear sound emitting portion between the display panel and the rear surface structure, a rear sound guide between the display panel and the rear surface structure to surround the vibration generating device in a spiral shape and configured to connect with the rear sound emitting portion.

Abstract: The present invention relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present invention and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

Abstract: The disclosure provides an array substrate and a method of manufacturing the same, a display device and a method of detecting a touch position. In the array substrate, the plurality of X and Y sensing lines are respectively parallel to gate data lines, and a sensing thin film transistor is provided at a crossing position where the X and Y sensing lines cross. A control terminal and an output terminal of the sensing thin film transistor are coupled to the X and Y sensing lines, respectively. A piezoelectric material layer is formed between the control terminal and an input terminal of the sensing thin film transistor such that, when being pressed, the piezoelectric material layer generates deformation such that a sensing voltage is generated at the input terminal of the sensing thin film transistor with relative to the control terminal of the sensing thin film transistor.

Abstract: An electroacoustic transducer includes a piezoelectric speaker and a housing. The piezoelectric speaker has: a first vibration plate with a periphery; a piezoelectric element placed on at least one face of the first vibration plate; and multiple openings that are provided around the piezoelectric element and penetrate through the first vibration plate in its thickness direction that is a first axis direction. The housing has: a supporting part that directly or indirectly supports the periphery; and a sound introduction port that faces the piezoelectric speaker in the first axis direction. The sound introduction port is provided at a position where it does not overlap, in the first axis direction, a first opening having the largest open area among the multiple openings. The electroacoustic transducer can improve the acoustic characteristics of a piezoelectric speaker.

Abstract: The invention relates to audio transducers, such as loudspeaker, microphones and the like, and includes improvements in or relating to: audio transducer diaphragm structures and assemblies, audio transducer mounting systems; audio transducer diaphragm suspension systems, personal audio devices incorporating the same and any combination thereof. The embodiments of the invention include linear action and rotational action transducers. For both types of transducer, rigid and composite diaphragm constructions and unsupported diaphragm periphery designs are described. Systems and methods for mounting the transducer to a housing, such as an enclosure or baffle are also described. Furthermore, hinge systems including: rigid contact hinge systems and flexible hinge systems are also disclosed for various rotational action transducer embodiments.

Abstract: A photoacoustic flow cell, the components of which may be made well in advance of conducting photoacoustic analysis, comprising (a) a chamber structure that defines a chamber, a chamber inlet, and a chamber outlet, and (b) a glass test structure, at least a portion of which is supported by the chamber structure and at least a portion of which is located in the chamber, wherein the test structure comprises an interior surface that defines a test passageway through which samples will be flowed when conducting the photoacoustic analysis.

Abstract: A device and a method for audio signal processing for a piezoelectric speaker for generating sound waves in the audible wavelength spectrum includes a signal input for a digital audio signal, a digital correction unit for correcting a nonlinearity of the speaker, a digital PWM generator that converts the signal corrected by the correction unit into a pulse-width modulated switch signal, a power stage controllable by the switch signal such that the speaker can be charged with a voltage for deflecting a membrane, and a closed-loop control circuit that feeds the voltage back as a feedback signal, which includes a first signal noise in the audible frequency range. The closed-loop control circuit of the device includes a noise shaping unit in that shifts a noise energy of the first signal noise outside of the audible frequency range.

Abstract: The present technology relates to an electroacoustic transducer and an electroacoustic transducer apparatus that are compact, have good characteristics, and can retain their stable shape. The electroacoustic transducer includes: a first sheet including a sheet-like piezoelectric material and having a curved shape; and a second sheet having substantially the same shape as the first sheet and placed on the first sheet in a layered manner. The present technology can be applied to an electroacoustic transducer.

Abstract: Provided are an electroacoustic conversion film web, an electroacoustic conversion film, and a method of manufacturing an electroacoustic conversion film web in which costs can be reduced by reducing the number of operations without damage to thin film electrodes, the points of electrode lead-out portions can be freely determined, and thus high productivity can be achieved. A preparation step of preparing an electrode laminated body in which a single thin film electrode and a single protective layer are laminated and a lamination step of laminating the electrode laminated body and an piezoelectric layer are included. A non-adhered portion that is not adhered to the piezoelectric layer is provided in at least one end portion of the thin film electrode in a case where the electrode laminated body and the piezoelectric layer are laminated in the lamination step.

Abstract: The present invention provides a speaker module comprising a module housing, and a speaker unit accommodated in the module housing, and the speaker unit separates a cavity formed by the module housing into a front acoustic cavity and a rear acoustic cavity; sound absorbing particles are filled into the rear acoustic cavity, and the sidewall of the module housing is provided with an isolation mesh cloth for isolating the sound absorbing particles and the speaker unit; the isolating mesh cloth is fixed to a first fixing frame by injection molding, and the first fixing frame is fixed in the corresponding module housing by injection molding. According to the present invention, it can prevent the problems such as leakage, deviation or breakage of the mesh during the process of fixing the isolating mesh cloth.

Abstract: Transducer assemblies that can be used in acoustophoretic systems are disclosed. The acoustophoretic systems including the transducer assemblies and methods of operating the acoustophoretic systems are also disclosed. The transducer assemblies include a housing, a polymeric film attached to the housing, and a piezoelectric material attached to the polymeric film. The piezoelectric material is not attached to, and does not come in direct contact with, the housing. The piezoelectric material is configured to be driven by a drive signal to create a multi-dimensional acoustic standing wave. The piezoelectric material can be attached to the polymer film by an adhesive coating on the polymer film.

Abstract: Discussed are a film speaker and a display device. The film speaker includes an electroactive layer including a first surface and a second surface opposite to the first surface, and further including a plurality of concave portions; and a first electrode and a second electrode disposed on at least one of the first surface and the second surface. Therefore, the sound generated in the film speaker may be further amplified and the sound pressure level may be improved.

Abstract: A system includes a panel extending in a plane, an actuator attached to a surface of the panel, and an electronic control module to activate the actuator to cause vibration of the panel. The actuator includes: a plate to create a force to cause vibration of the panel to generate sound waves, having a width, WT, at a first edge; a stub extending from the first edge of the plate, having a width at a region of connection to the plate that is less than WT, the stub being attached to the surface of the panel to transfer the force received from the plate to the panel and cause the panel to vibrate; and a damper supported by a surface of the plate facing the panel coupling the plate to the panel, the damper having a having a width greater than WS.

Abstract: A piezoelectric actuator includes a suspension plate, a piezoelectric ceramic plate, an outer frame and a bracket. The suspension plate is permitted to undergo a curvy vibration from a middle portion to a periphery portion. The piezoelectric ceramic plate is attached on the suspension plate. When a voltage is applied to the piezoelectric ceramic plate, the suspension plate is driven to undergo the curvy vibration. The outer frame is arranged around the suspension plate. The bracket is connected between the suspension plate and the outer frame for elastically supporting the suspension plate, and includes an intermediate part formed in a vacant space between the suspension plate and the outer frame and in parallel with the outer frame and the suspension plate, a first connecting part arranged between the intermediate part and the suspension plate, and a second connecting part arranged between the intermediate part and the outer frame.

Abstract: Diaphragm element arrangements including at least one bistable diaphragm element, which has a first stable state and a second stable state, and corresponding methods are provided. The bistable diaphragm element can be activated above a changeover threshold in order to change over between the first and the second stable state or below the changeover threshold.

Abstract: A display device unit includes: a display device; and a sound element disposed at a side surface or a rear surface of the display device, where the sound element includes a vibration material layer which provides a sound based on an electric field applied therein, and a pair of electrodes which generates the electric field in the vibration material layer.