Abstract: The present invention provides a speaker box including a housing, a sound unit and a magnetic circuit coupling valve. The sound unit includes a bracket, a vibration system and a magnetic circuit system including a secondary magnet. The housing includes a bottom cover having leakage holes. The magnetic circuit coupling valve is accommodated in a rear cavity and includes a support, a negative stiffness diaphragm and a coil. The negative stiffness diaphragm faces to the leakage holes. The coil receives an external control signal and generates an electromagnetic field with the secondary magnet to drive the negative stiffness diaphragm to seal the leakage holes, or make the leakage holes open, or make the leakage holes partially open or closed. Compared with a related technology, the speaker box has fine acoustic performance and is able to accurately control communication of a rear cavity with the outside.

Abstract: This application discloses example piezoelectric acoustic sensors and methods for manufacturing the piezoelectric acoustic sensor, and belongs to the field of electronic technologies. In one example, the piezoelectric acoustic sensor includes an anchoring unit, a piezoelectric unit, a support unit, and a hollow-out mechanical part. A back cavity is formed in the anchoring unit. The piezoelectric unit is configured to convert a sound signal that enters the back cavity into an electrical signal. The support unit covers the anchoring unit and the piezoelectric unit. The hollow-out mechanical part is connected between the anchoring unit and the piezoelectric unit, and is embedded in the support unit.

Abstract: Disclosed is a sound-producing apparatus, including a vibration assembly and a magnetic circuit assembly, the vibration assembly includes a diaphragm which vibrates to generate sound waves, wherein, a middle region of the magnetic circuit assembly is hollowed out to form a volume expansion cavity penetrating through the magnetic circuit assembly, with a flexible deformation portion being provided in a region of the magnetic circuit assembly located in the volume expansion cavity; the flexible deformation portion covers a port of the volume expansion cavity or separates the volume expansion cavity into two regions that are isolated from each other; the flexible deformation portion is disposed facing the diaphragm, and can vibrate as a function of air pressure.

Abstract: A speaker includes a vibration diaphragm, a voice coil, a first magnet, and a second magnet. Each of the first and second magnets includes an end adjacent to the voice coil and an end distant from the voice coil, of which magnetic polarities are opposite to each other. The ends of the first magnet and the second magnet that are adjacent to the voice coil are of opposite magnetic polarities. The voice coil is partly aligned with a gap between the first magnet and the second magnet. A portion of the voice coil is located between the end surfaces of the first and second magnets that exhibit a height difference. Due to the height difference, a path of the magnetic lines of force is shortened and the magnetic flux density in an area around the voice coil is thus increased, thereby increasing the BL value of electromechanical coupling factor.

Abstract: A speaker includes a frame, a magnetic circuit system setting section, a magnetic circuit system and a balance element. The frame has a first surface. The magnetic circuit system setting section is formed on the first surface of the frame, the magnetic circuit system setting section includes a first region and a second region, and the second region surrounds the first region. The magnetic circuit system is arranged in the magnetic circuit system setting section, and includes a voice coil. The voice coil has a first end facing the first surface and located in the second region. The balance element is connected to the first surface and the first end.

Abstract: An electronic device package comprises an electronic acoustic device including a primary microphone having a frequency response having a resonance frequency, and a reference microphone having a frequency response including a resonance frequency. The primary microphone and the reference microphone are configured to substantially simultaneously receive a common acoustic signal to produce a transduced signal of the primary microphone and a transduced signal of the reference microphone, the resonance frequency of the reference microphone being different than the resonance frequency of the primary microphone. An equalization module is configured to equalize the frequency response of the microphone based on the transduced signal of the microphone and the transduced signal of the reference microphone. The package defines a first back cavity of the primary microphone and a second back cavity of the reference microphone, the second back cavity being acoustically isolated from the first back cavity.

Abstract: A miniature loudspeaker includes an outer shell, a magnetic circuit assembly including an inner-ring magnetic circuit unit and an outer-ring magnetic circuit unit with an annular gap formed therebetween, a voice coil and a diaphragm. The outer shell is provided with a positioning column which defines a hollow channel, and a hollow tuning hole is defined in the bottom of the outer shell corresponding to the hollow channel. Multiple circumferential tuning holes are defined at the bottom of the outer shell and communicated with the annular gap to form a tuning channel. The voice coil includes a winding located in the annular gap and between the middle magnets of the inner-ring magnetic circuit unit and the outer-ring magnetic circuit unit. The hollow channel directly faces the diaphragm and forms another tuning channel together with the diaphragm.

Abstract: A speaker-element for a speaker includes two substantially mutually opposing spaced apart membrane planes, where each membrane plane comprises at least one electromagnetic wire arranged for creating a magnetic field upon an electric current passing through the electromagnetic wire. A permanent magnet is arranged between the two membrane planes, the electromagnet wires of the two membrane planes are connectable to an electric power source so that the electric current passes therethrough in substantially mutually opposing directions to create substantially mutually opposing magnetic fields, such that upon passing an electric current through the electromagnetic wire of each membrane plane said membrane planes are both either attracted towards or repulsed from the permanent magnet and thereby moved towards or away from each other, respectively, thereby producing a sound wave.

Abstract: An actuator module includes a baseplate extending in a plane, a voice coil connected to the baseplate, and a magnet assembly. The actuator module also includes a rigid frame attached to the baseplate, the rigid frame comprising four stubs. The actuator module further includes a pair of springs suspending the magnet assembly relative to the frame and baseplate so that the voice coil extends into the air gap, the pair of springs including a first and second spring each shaped as a loop defining an aperture sized to accommodate motion of the magnet assembly along a direction of the coil axis, the first spring being attached to the frame at a first pair of the four stubs, the second spring being attached to the frame at a second pair of the four stubs, and both being attached to separate portions of the magnet assembly.

Abstract: An audio transducer includes a frame, a magnet coupled to the frame, and a voice coil axially aligned with the magnet. The voice coil can be configured to receive a flow of electric signals from an amplifier, and, in response to the received flow of electric signals, correspondingly move a diaphragm toward or away from the magnet. The audio transducer can further include a collar coupled to the voice coil. The collar can have a flange extending radially outwardly from the voice coil. The audio transducer can further include a spider having a radially outer portion coupled to the frame and a radially inner portion coupled to the flange of the collar.

Abstract: Aspects of the subject technology relate to a shaker module for an electronic device. The shaker module may include a movable component that is resiliently suspended in relation to a voice coil by one or more gap-separated pairs of the flat springs. The flat springs reduce the z-height of the shaker module for implementation in, for example, compact electronic devices. The gap-separated pairs of flat springs facilitate adjustment of the resonance frequency of the shaker module substantially independently of adjustments to drop performance, while providing stability against unwanted rocking motions of the movable component.

Abstract: The invention provides a loudspeaker with a fin-reinforced voice coil structure, comprising a voice coil, fins, an upper magnetic conductor, and a magnetic conduction column, wherein a magnetic gap is formed between the upper magnetic conductor and the magnetic conduction column located in the center thereof; the voice coil works in the magnetic gap; wherein the inner wall of the voice coil is connected to the fins; wherein one end of each fin is connected and fixed to the inner wall of the voice coil; wherein the magnetic conduction column is provided with fin grooves for accommodating the other ends of the fins; wherein the width of the fin grooves is at least 0.2 mm greater than the thickness of the fins, so that the balance performance and the stability of the voice coil are greatly improved. The distortion is greatly reduced compared, by measurement, with the traditional voice coil.

Abstract: Provided is a multifunctional sounding device and an electronic device. The multifunctional sounding device includes a casing, a sounding body accommodated in the casing, a vibrator assembly and an elastic supporting member for suspending the vibrator assembly in the accommodating space and providing elastic restoring force. The sounding body includes a vibration system and a magnetic circuit system for driving the vibration system to sound. The elastic supporting member includes a first supporting arm fixed to the vibrator assembly, bent portions bent and extended from both ends of the first supporting arm, and second supporting arms extended away from the first supporting arm and both fixed to the casing. A thickening member is arranged on each bent portion, and a sum of a thicknesses of each bent portion and the thickening member is greater than a thicknesses of the first supporting arm and the second supporting arm.

Abstract: A speaker and/or an electronic device are provided. The electronic device includes the same may include a diaphragm, a yolk disposed to face the diaphragm and including an avoidance groove formed on a surface thereof facing the diaphragm, a coil mounted to one surface of the diaphragm and disposed between the diaphragm and the yolk, and a first magnet mounted to the yolk and disposed to be surrounded by at least part of the coil or a second magnet disposed to surround at least part of the coil. The coil may be disposed to make a surface thereof facing the yolk correspond to the avoidance groove and configured to linearly reciprocate the diaphragm by receiving an electric signal.

Abstract: Disclosed is a gaming unit for a gaming system, the gaming system comprising the gaming unit and a plurality of playing pieces, each playing piece of the plurality of playing pieces comprising a magnet and having an identifier. The gaming unit comprises: a play zone for arranging one or more playing pieces of the plurality of playing pieces on the gaming unit; a control unit; and a first magnetic unit configured to generate or alter a magnetic field for magnetically affecting one or more playing pieces arranged in the play zone. The first magnetic unit being operationally connected to the control unit. The control unit is configured to detect the identifier of a playing piece arranged in the play zone and responsive to the detection of one more particular identifiers generate a control signal controlling the first magnetic unit to generate or alter a magnetic field thereby magnetically affecting one or more playing pieces in the play zone.

Abstract: Disclosed is a coil module, comprising: a vibrating membrane suspended on an air chamber defined and supported by a first substrate, at least one planar coil, embedded in the vibrating membrane, and at least a soft magnet, embedded in the vibrating membrane and disposed surrounding at least a portion of a contour of the planar coil; wherein a substantial portion of the planar coil locates at substantially the same plan where a portion of the soft magnet is arranged. A microspeaker and a method for preparing the same are also disclosed.

Abstract: A coaxial speaker includes a frame, a vibration system, and a magnetic circuit system. The vibration system includes a vibrating diaphragm and a voice coil. The magnetic circuit system includes a transmission cavity, an inner magnetic gap, and an outer magnetic gap. The inner magnetic gap includes a first magnetic gap and a second magnetic gap. The transmission cavity penetrates through the magnetic circuit system. The vibrating diaphragm includes a first vibrating diaphragm, a second vibrating diaphragm, and a third vibrating diaphragm. The third vibrating diaphragm and the first vibrating diaphragm reversely vibrate. The first vibrating diaphragm and the third vibrating diaphragm seal the transmission cavity. The voice coil includes a first voice coil, a second voice coil, and a third voice coil. The coaxial speaker effectively reduces sound leakage of a front receiver during working, and realizes a private call function.

Abstract: The present disclosure discloses a multifunctional sounding device including a frame, a vibrator assembly, and a speaker assembly. The vibrator assembly includes a vibrating unit suspended in the frame and vibrating along a first direction. The speaker assembly includes two magnetic units, a diaphragm, and two voice coils. The two magnetic units are fixed to the frame and locate on two opposite sides of the vibrating unit respectively. Each magnetic unit includes a magnetic gap. The diaphragm is fixed to the frame and vibrates along a second direction that is perpendicular to the first direction. The two voice coils locate in the magnetic gaps of the two magnetic units respectively. A winding axis of each voice coil is perpendicular to the first direction and the second direction. The multifunctional sounding device disclosed by the present disclosure combines functions of emitting sounds and providing vibrations.

Abstract: An outer structure of a magnetic circuit is held inside a holder recess of a magnetic circuit holder of a frame. A pressing portion is screw-fixed to a mounting surface of the magnetic circuit holder. Elastically deformable pressing arms are formed at the pressing portion, and the pressing arms press a restriction surface of the outer structure of the magnetic circuit.

Abstract: It is an object to provide a speaker including a strong magnetic circuit and a method of manufacturing a speaker. To achieve the object, a speaker according to the present technology includes an outer magnet and an inner magnet. The outer magnet has a ring shape and is magnetized along an axial direction of the ring shape. The inner magnet has a circular outer shape when viewed from the axial direction of the outer magnet, is magnetized in a direction opposite to a direction of the outer magnet along the axial direction, and is disposed inside the outer magnet through a gap.

Abstract: A MEMS microphone is provided, comprising a substrate having a back cavity, and a plate capacitor structure arranged on the substrate, the plate capacitor structure being formed by a vibration diaphragm, a backplate and a support portion; wherein a pressure relief device is provided in the vibration diaphragm, a pressure maintaining channel is formed between the vibration diaphragm and the backplate; and the pressure relief device in the vibration diaphragm constitutes an inlet of the pressure maintaining channel.

Abstract: Disclosed is a sound-producing device, comprising: a housing having an accommodating room where a magnetic circuit system is installed; a voice coil including a bobbin and a voice coil body; a conductive member having a first connecting part fixed to the voice coil, a second connecting part fixed to the housing, and an elastic part located between the two connecting parts; the conductive member is combined on the voice coil body, the magnetic circuit system is provided with an avoidance part corresponding to the conductive member; the voice coil is provided with an inner conduction structure, the housing is provided with an outer conduction structure that is in electrical conduction with an external circuit; and upon being electrically connected with the inner conduction structure, the first connecting part passes through the avoidance part and extends to the housing, and is electrically connected with the outer conduction structure.

Abstract: The present invention provides a multifunctional sounding device including a housing, a first vibration system, a second vibration system, a magnetic circuit system, an elastic component and a flexible circuit board. The elastic component includes a deformation part fixed to the second vibration system and an installation part extended from both ends of the deformation part and fixed to the housing. The second vibration system is suspended in the containment cavity through the elastic component. The flexible circuit board is connected with the elastic component, so that the vibration of the flexible circuit board is coupled with the vibration of the elastic component. Therefore, the damping of the elastic component is reduced, the force received by the elastic component during vibration is reduced, and the service life of the elastic component is extended.

Abstract: A speaker includes: a housing including a ring-shaped frame, a front cover and a bottom shell; a vibration system and a magnetic circuit system, the vibration system including a diaphragm fixed on the frame, a voice coil support fixed on the diaphragm and a voice coil supported by the voice coil support, the magnetic circuit system including a first magnetic yoke fixed on the front cover and a magnet assembly fixed on the first magnetic yoke. A first opening is provided to penetrate a center portion of the diaphragm, and the diaphragm includes an inner edge enclosing the first opening and an outer edge fixed to the frame, the magnetic circuit system extends through the first opening, the housing further includes an extension portion extending from the front cover toward the diaphragm and surrounding the magnetic circuit system, and the inner edge of the diaphragm is fixed to the extension.

Abstract: A method of detecting at least a partial blockage in a porous member separating a first volume from a second volume or inner chamber of a device includes emitting pressure waves within the inner chamber by changing a volume of the inner chamber, measuring a response via a pressure sensor responsive to pressure waves positioned within the inner chamber, and determining if at least a partial blockage is present in the porous member based upon the response of the pressure sensor.

Abstract: A display apparatus includes a display panel configured to display an image, a supporting member on a rear surface of the display panel and configured to support the display panel, a sound generating device on the rear surface of the display panel and configured to vibrate the display panel to generate sound, and a connection part configured to connect the supporting member to the sound generating device. The sound generating device includes a plate spaced apart from the supporting member, a frame outside the plate, a magnet and a center pole on the plate, a bobbin around the center pole, and a coil outside the bobbin. The connection part is between the supporting member and the frame.

Abstract: The present disclosure discloses a multifunctional sounding device including a frame, a vibrator assembly, and a speaker assembly. The frame includes a top wall and a bottom wall. The vibrator assembly includes a vibrating unit vibrating along a first direction. The speaker assembly includes two magnetic units locating on two opposite sides of the vibrating unit respectively, a diaphragm fixed to the top wall, and two voice coils. The diaphragm vibrates along a second direction that is perpendicular to the first direction. A winding axis of each voice coil is perpendicular to the first and second directions. The two magnetic units are sandwiched between the top wall and the bottom wall. A peripheral edge of the diaphragm is recessed inward for avoiding the two magnetic units. The multifunctional sounding device disclosed by the present disclosure combines functions of emitting sounds and providing vibrations.

Abstract: The present disclosure provides a moving-magnet-type linear vibration motor that comprises a housing, having an accommodation space; two elastic members, oppositely connected on side walls of the housing; a mass block, hung inside the accommodation space of the housing through circumferential wall respectively connected with the two elastic members; two magnets, respectively fixedly connected with two sides of the mass block, and forming an acute angle or an obtuse angle with respect to a connection line between the centers of the two elastic members; two coils, fixed on the housing and respectively spaced apart from a corresponding one of the magnets, and forming an acute angle or an obtuse angle with respect to the connection line between the centers of the two elastic members.

Abstract: A dipole loudspeaker for producing sound at bass frequencies. The dipole loudspeaker includes: a diaphragm having a first radiating surface and a second radiating surface, wherein the first radiating surface and the second radiating surface are located on opposite faces of the diaphragm; a drive unit configured to move the diaphragm at bass frequencies such that the first and second radiating surfaces produce sound at bass frequencies, wherein the sound produced by the first radiating surface is in antiphase with sound produced by the second radiating surface; a frame, wherein the diaphragm is suspended from the frame via one or more suspension elements, wherein the frame is configured to allow sound produced by the first radiating surface to propagate out from a first side of the dipole loudspeaker and to allow sound produced by the second radiating surface to propagate out from a second side of the dipole loudspeaker.

Abstract: Disclosed in embodiments of the present disclosure are a diaphragm assembly, a loudspeaker module and an electronic device, the diaphragm assembly including a diaphragm body and an intermediate patch plate, wherein the diaphragm body includes a first diaphragm body and a second diaphragm body; the first diaphragm body is provided with a first hole; the intermediate patch plate includes a first intermediate patch plate; the second diaphragm body at least partially cover the first hole; the first intermediate patch plate is respectively connected to the first diaphragm body and the second diaphragm body; the first intermediate patch plate is configured to have an enclosed structure, or the intermediate patch plate includes a second intermediate patch plate connected to the second diaphragm body, such that the mid-high frequency curves of the loudspeaker module are smoother, thereby effectively improving the mid-high frequency tone quality.

Abstract: To prevent generation of a loud impact sound, a tactile generation apparatus is provided with a vibration generator on a back surface of a vibration member. The vibration generator is a solenoid including a movable core and a coil. The movable core is capable of moving close to and away from the vibration member. The coil displaces the movable core toward the vibration member to deform the vibration member when energized, and moves the movable core away from the vibration member when deenergized, so as to vibrate the vibration member due to an elastic restoring force of the vibration member.

Abstract: A speaker device comprising two membranes facing each other, and two drive units arranged for driving the two membranes in opposite direction in operation. A vented frame element and a closed frame element are positioned outward on either side of the two membranes. At least one bellows element is connected on a first side to the membrane which is positioned closest to the closed frame element, and connected on a second side to the closed frame element.

Abstract: Provided is a vibration exciter, comprising a shell having a receiving space, a vibration unit suspended in the shell, a coil configured to drive the vibration unit, and an elastic member configured to suspend the vibration unit in the shell. The vibration unit comprises a mass block fixedly connected to the elastic member. The mass block comprises fixing planes opposite to each other along a vibration direction. The elastic member has one end fixed to the mass block and another end fixed to the shell, and a projection of the elastic member in the vibration direction is at least partially located in the fixing planes. Compared with the related art, the vibration exciter provided by the present invention can improve the vibration stability.

Abstract: An acumoxa therapy device utilizes energy waves for preventing, alleviating or treating COVID-19 (SARS-CoV-2) coronavirus infection. In one embodiment, the device delivers energy in a non-invasive manner. In one embodiment, the device is configured to include an energy pin and one or more energy rings. In one embodiment, the device delivers sufficient energy to certain body parts such as acupoints to achieve an intervening and/or therapeutic effect. In one embodiment, the device maintains or improves general health, or alleviates or treats a subject with COVID-19 infection and one or more other conditions.

Abstract: A sound generator includes a sound generating body, a base, a protection wall, and an erected wall. The sound generating body includes a diaphragm and a driving portion. The base includes a base tubular portion and a partition wall defining a sound hole. The diaphragm and the partition wall divide an inner space of the base tubular portion into a first space and a second space. The protection wall is disposed away from the partition wall and the erected wall connects between the protection wall and the base tubular portion. The protection wall, the erected wall, and the partition wall defines a sound emission space in communication with the first space through the sound hole. The protection wall and the erected wall define an emission hole through which the sound exits.

Abstract: Provided is a sounding device, including frame and vibration system and magnetic circuit unit fixed to the frame. The vibration system includes diaphragm, voice coil driving the diaphragm to vibrate and sound, holder fixed to diaphragm, and auxiliary diaphragm spaced from diaphragm. The holder includes holder main body, first connection portion formed from holder main body to magnetic circuit unit and second connection portion spaced from first connection portion. The voice coil is fixed to second connection portion. One end of the auxiliary diaphragm is fixed to frame. One end of first connection portion away from holder main body bends and extends away from second connection portion to form flange. One end of auxiliary diaphragm away from frame is fixed to flange. The sounding device may reduce accuracy deviation and hidden dangers of gluing failure caused by rear assembling of the auxiliary diaphragm.

Abstract: A basket assembly, an audio unit and an electronic device. The basket assembly is applied to an audio unit with a voice coil and includes a basket body. The basket body includes: a metal portion, a plastic portion coupled to the metal portion; and a conductive member embedded in the plastic portion and forming a first contact and a second contact exposed out of the plastic portion, the first contact is configured to be electrically coupled to the voice coil of the audio unit, the second contact is configured to be electrically coupled to a target circuit, and the target circuit includes an audio signal input circuit or an audio signal output circuit.

Abstract: Disclosed is a sound generator, including a bracket, a magnetic circuit system, a first vibration system, and a second vibration system. The bracket has a first opening and a second opening that face opposite directions. The magnetic circuit system is used for driving the first vibration system and the second vibration system to generate sound in different directions. The first vibration system includes a first voice coil, the second vibration system includes a second voice coil, and the magnetic circuit system includes a first magnet, a second magnet, and a third magnet. The first voice coil is sleeved on outer sides of the first magnet and the second magnet simultaneously, and the second voice coil is sleeved on outer sides of the second magnet and the third magnet simultaneously. In the present invention, the loudness of sound generated by the sound generator may be improved.

Abstract: Provided is a speaker, including a frame; a vibration unit fixed to the frame; and a magnetic circuit unit provided with a magnetic gap. The magnetic circuit unit includes a yoke and a magnet; the vibration unit includes a diaphragm and a voice coil; the diaphragm includes a dome and a suspension; the suspension includes an inner edge, an outer edge, a suspension portion, and an extension portion; the diaphragm includes a structural layer and a metal layer; the inner edge includes a first recess, and the extension portion includes a second recess; and the voice coil is electrically connected to the metal layer through the first recess, and the metal layer is electrically connected to an external circuit through the second recess. With this structure, an internal space of the speaker is saved, reducing material cost and improving reliability.

Abstract: The present invention relates to a method for manufacturing a membrane component with a membrane made of a thin film (<1 ?m, thin-film membrane). The membrane component can be used in microelectromechanical systems (MEMS). The invention is intended to provide a method for manufacturing a membrane component, the membrane being manufacturable with high-precision membrane dimensions and a freely selectable membrane geometry. This is achieved by a method comprising . . . providing a semiconductor wafer (100) with a first layer (116), a second layer (118) and a third layer (126). Depositing (12) a first masking layer (112) on the first layer (116), the first masking layer (112) defining a first selectively processable area (114) for determining a geometry of the membrane (M1). Forming (13) a first recess (120) by anisotropic etching (13) of the first layer (116) and removing the first masking layer (112).

Abstract: An electronic device can include a housing at least partially defining an internal volume and an aperture in communication with the internal volume and an ambient environment. A speaker module can be positioned at the aperture and sealed to the housing to define a liquid barrier. The speaker module can include a metallic support member partially defining the internal volume and a flat mounting surface, a magnet affixed to the flat surface, a speaker module enclosure affixed to the metallic support member, and a diaphragm carried by the speaker module enclosure and positioned opposite the magnet.

Abstract: A segmented stator plate for an electrostatic transducer is provided. The segmented stator plate may have multiple electrically separate sections that can be independently operated and are usable to generate sound and/or detect sound waves in the electrostatic transducer.

Abstract: An assembly includes a panel member and an acoustic sink member. The panel member has a panel edge, and first and second long axes defining a plane. The panel member has a first material composition. The acoustic sink member has a body with a periphery which is coupled to the panel edge. The body has a second material composition, which is distinct from the first material composition. An acoustic impedance of the sink member at the periphery is equal to an acoustic impedance of the panel member at the panel edge, and the body has a cross-sectional profile defined by a power law.

Abstract: An optoelectronic module including a light emitter to generate light to be emitted from the module, a plurality of spatially distributed light sensitive elements arranged to detect light from the emitter that is reflected by an object outside the module, and one or more dedicated spurious-reflection detection pixels.

Abstract: A depth sensing system is configured to track one or both eyes of a user. The depth sensing system includes a transducer chip comprising a phased array of ultrasound transducers that transmit a signal at an eye of the user and detect a reflected signal from the eye. A controller estimates an orientation of the eye based on the reflected signals received by the phased array. The depth sensing system may be part of a headset that includes a display element configured to display content to a user wearing the headset.

Abstract: An electromagnetic actuator includes an inner magnet arranged relative to an axis, an outer magnet arranged a radial distance from the axis, an inner radial wall of the outer magnet facing an outer radial wall of the inner magnet, the inner and outer radial walls being separated by an air gap, a voice coil arranged in the air gap separating the inner and outer magnets, and an actuator coupling plate attached to the voice coil. During operation of the device electrical activation of the voice coil causes axial motion of the actuator coupling plate.

Abstract: A microphone and its manufacturing method, relating the semiconductor techniques, are presented. The microphone comprises: a substrate comprising an opening, a first electrode layer at the bottom of the opening, and at least one groove adjacent to the first electrode layer, with the groove and the opening on two opposing sides of a bottom surface of the first electrode layer; a separation material layer filling the groove; and a second electrode layer on the separation material layer, wherein the first electrode layer, the separation material layer, and the second electrode layer form a cavity. In this inventive concept, the separation material layer on the groove works as an anchor node embedding in the substrate to increases the effective contact area and the bonding power, and to improve the bonding quality between the second electrode layer and the substrate, which results in a strengthened second electrode layer.

Abstract: One embodiment provides a slim acoustic transducer with a diaphragm that is substantially centered on a vertical axis. A first top plate is substantially perpendicular to the vertical axis. The first top plate houses a first upper magnet. A first bottom plate is substantially perpendicular to the vertical axis. The first bottom plate houses a first lower magnet. A voice coil has a height parallel to the vertical axis. The voice coil is at least partially disposed within the first top plate and at least partially disposed within the first bottom plate.

Abstract: A vibration generation apparatus includes a concave frame, a vibrator, and a first damper. The frame has an opening in upper portion thereof. The vibrator is housed in the frame. The first damper is connected to the vibrator and the frame and is configured to hold the vibrator such that the vibrator is able to move in an up-down direction with respect to the frame. The first damper has a predetermined thickness. The first damper is in an N-shape in a side view and includes two bent portions and has an upper end mounted on an edge of the opening and a lower end mounted on a lower edge of the vibrator.

Abstract: The present invention discloses a sound production apparatus, comprising a first vibration system, a second vibration system and a magnetic circuit system, wherein the first vibration system comprises a first diaphragm and a voice coil arranged on a side, facing the magnetic circuit system, of the first diaphragm; the second vibration system comprises a second diaphragm arranged opposite to the first diaphragm, and a middle position of the second diaphragm is combined with a reinforcement portion; the reinforcement portion is provided with an extension portion extending along a direction close to the first diaphragm, and a position, corresponding to the extension portion, in the magnetic circuit system is provided with an avoidance portion; and the extension portion is capable of passing through the avoidance portion, and is fixed to the first diaphragm.