Abstract: A diaphragm for use is a loudspeaker is described. This diaphragm may include a housing with an elongated shape having a length along a first axis that is longer than a width along a second axis. Moreover, the housing may include: an outer surface and an inner surface; an outer opening defined by an outer edge and an inner opening defined by an inner edge; and regions having heights relative to the inner surface, where the regions are grouped in pairs that are positioned equidistant and symmetrically about the inner opening along the first axis. Furthermore, the regions may have a second length along the first axis, and the second length may be less than a distance along the first axis between the outer edge and the inner edge. Note that the regions may increase a stiffness of the diaphragm relative to a stiffness of a material in the diaphragm.

Abstract: A MEMS microphone includes a first dummy pad elevating a circumferential portion of an intermediate insulation layer adjacent to a second pad electrode, a second dummy pad elevating a first circumferential portion of an upper insulation layer adjacent to the second pad electrode, and a third dummy pad elevating a second circumferential portion of the upper insulation layer adjacent to the first pad electrode. Thus the first circumferential portion of the upper insulation layer is elevated relative to an upper surface of the second pad electrode, and the second circumferential portion of the upper insulation layer is elevated relative to an upper surface of the first pad electrode.

Abstract: The invention provides a sound generator having a frame, a vibration system and a magnetic circuit system carried by the frame. The vibration system includes a diaphragm, a coil and an elastic support assembly. The diaphragm includes a first suspension ring fixed with the frame, a first dome at a center of the first suspension ring, and a second dome stacked on the first dome. The first dome includes a main body, a first wall, and a second wall extending perpendicularly from the first wall for connecting to the coil via the first wall. The first wall is connected to a side surface of the coil. The first wall and the second wall are used for elastically suspending the coil below the diaphragm. Thus, the sound generator has improved high frequency performance.

Abstract: A miniature receiver including a first moveable diaphragm being acoustically connected to an intermediate volume, and a second moveable diaphragm being acoustically connected to the intermediate volume and a rear volume. The acoustic compliance of the intermediate volume is smaller than the acoustic compliances of the respective first and second moveable diaphragms. An associated method is also disclosed.

Abstract: A yoke for the speaker includes: a parent member molded of an iron-based powder; and a heterogeneous material molded of a metal powder having a higher conductivity and a lower magnetic susceptibility than the iron-based powder, wherein the heterogeneous material is integrally disposed on at least one of a part of a surface of the parent member, or an internal portion of the parent member, or both, and the heterogeneous material diverts an eddy current generated in the parent member.

Abstract: Provided is a speaker, including a holder, a pad fitted in the holder, and a conductive terminal. The conductive terminal comprises a fixed portion fitted into the holder, an elastic arm, and an engaging portion, an electrical connection portion. The elastic arm comprises an arc-shaped conductive portion connected to the fixed portion, and an extending portion connecting the arc-shaped conductive portion and the electrical connection portion. The arc-shaped conductive portion is spaced apart from the holder and protruding from the holder, the extending portion extends from the arc-shaped conductive portion towards the holder, and an end of the extending portion facing away from the arc-shaped conductive portion is attached to the holder. The engaging portion extends from an edge of an end of the extending portion facing away from the arc-shaped conductive portion while being bent towards the holder, and is engaged in an engaging groove of the holder.

Abstract: The present disclosure provides a speaker, including a housing and a vibration unit and a magnetic circuit unit that are received in the housing. The magnetic circuit unit includes a magnetic frame, the magnetic frame comprising a bottom wall and a sidewall extending from the bottom wall while being bent towards the housing. A positioning portion protruding outwardly is provided on the sidewall of the magnetic frame, and the positioning portion abuts against the housing. The speaker of the present disclosure can achieve the positioning of the magnetic frame using the positioning portion provided on the sidewall of the magnetic frame during the assembling, and it is unnecessary to sacrifice the flanging length of the magnetic frame, so that the flanging of the magnetic frame can be maximized, thereby improving the performance of the speaker.

Abstract: A micro-speaker includes a vibration unit including a diaphragm assembly and a voice coil assembly, a magnetic circuit unit including a yoke including a voice coil bobbin and a voice coil affixed to the voice coil bobbin, and a magnet provided on the yoke, and a holder including a holder bottom wall abutting against the yoke, a holder sidewall extending from a side of the holder bottom wall close to the magnet along a direction facing away from the yoke and forming a magnetic gap with the magnet in which the voice coil is disposed, and a magnetism shielding wall formed by extending from a side of the holder sidewall facing away from the yoke while being bent towards the voice coil, a side of the magnetism shielding wall facing away from the diaphragm being provided with a hollow annular magnetic conductive sheet spaced apart from the voice coil.

Abstract: The present disclosure provides a speaker which includes a frame, and a vibration system and a magnetic circuit system that are accommodated in the frame, where the magnetic circuit system is configured to drive the vibration system to vibrate and produce sound. The vibration system includes a diaphragm for vibrating and producing sound and a voice coil for driving the diaphragm to vibrate, and the magnetic circuit system includes a yoke fixedly connected to one end of the frame away from the diaphragm and a magnet assembled on the yoke. The vibration system further includes an iron core for driving the diaphragm to vibrate, and the voice coil is wound around the iron core. Compared with a related technology, the speaker provided in the present disclosure has a better acoustic effect.

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. The inner magnet is axially magnetized and the outer magnet is radially magnetized. During operation of the device electrical activation of the voice coil causes axial motion of the actuator coupling plate.

Abstract: The speaker of the present disclosure comprises a frame having a receiving space, a vibration system and a magnet circuit system received in the frame. The magnet circuit system comprises a lower magnetic plate, a magnet attached on the lower magnetic plate and a pole plate attached on the magnet, wherein the pole plate comprises a main body portion and a bending portion bend along a direction from an edge of the main body portion toward the lower magnetic plate, the surface of the magnet attached to the main body portion is recessed to form a recessed portion, and the bending portion is received in the recessed portion. Compared with the related art, the speaker of the present disclosure improves the performance and the competitiveness of the product.

Abstract: The present disclosure discloses a diaphragm for radiating sound, includes: a dome part and a suspension part surrounding the dome part. The suspension part includes a first subgroup, a second subgroup, and a third subgroup arranged in a sequence, the first subgroup being close to the dome part, the third subgroup away from the dome part, and the second subgroup between the first and third subgroups. Each of the first, second, and third subgroups includes a number of patterns arranged along a circumference direction of the dome part. Selected patterns in the second subgroup are opposite to corresponding patterns in the first subgroup, and selected patterns in the second subgroup are opposite to corresponding patterns in the third subgroup; and each corner of the suspension part is provided with the first subgroup, the second subgroup and the third subgroup.

Abstract: A speaker comprising a frame; a first magnetic body and a second magnetic body each coupled to the frame and spaced apart by a predetermined distance from each other to form a gap, wherein the first magnetic body and the second magnetic body are arranged such that opposite polarities of the first magnetic body and the second magnetic body are provided at adjacent lateral positions; a first diaphragm; a second diaphragm; and a first voice coil plate having at least one voice coil wound on and coupled to the voice coil plate, the first voice coil plate being located in the gap between the opposite polarities of the first magnetic body and the second magnetic body, wherein the first voice coil plate is coupled to the first diaphragm and second diaphragm.

Abstract: The present disclosure provides a vibration diaphragm. The vibration diaphragm includes a vibration part; a suspension extending from and surrounding the vibration part; and a pattern module part formed on the vibration part. The pattern module part includes a first protrusion, a second protrusion bounded by the first protrusion, and a gap formed between the first protrusion and the second protrusion. By virtue of the configuration of the pattern module part, the solution described by the present embodiment increases the surface area of the vibration part, and widens the bandwidth of the vibration diaphragm, and further improves the acoustic performance of the diaphragm.

Abstract: The technology disclosed herein enables retention of a speaker on a mounting surface using a clip and a flange. In a particular embodiment, an apparatus includes a speaker comprising a substantially elliptic speaker frame. The apparatus further includes a mounting surface comprising a substantially cylindrical flange into which the speaker frame is positioned. Also, the apparatus includes a substantially elliptic clip positioned in the flange between the speaker frame and a retaining rim of the flange.

Abstract: An apparatus includes a surface arranged to be mechanically displaced, first permanent magnet coupled with the surface, at least one supporting member for supporting the surface, base, second permanent magnet, coil coupled with the second magnet, and signal port electrically coupled with the coil. An electrical signal is configured to travel between the signal port and the coil. The electrical signal in the coil is proportional to mechanic displacement of the surface when a force equilibrium state of the surface is broken by the electrical signal in the coil or the mechanic displacement of the surface from a position of the force equilibrium state. The coil is arranged at least partially between the first magnet and the second magnet or around one of the first magnet, the second magnet. Either the same or different polarities of the first and second magnets are arranged to directly face each other at a distance.

Abstract: The present invention is related to a hybrid speaker comprising a tweeter and a dynamic woofer, wherein the tweeter has upper and lower coils arranged opposite to each other, an open-type high-tone vibration plate formed with a closed-type center hole at its center and located between the upper and lower coils, and one or more permanent magnets arranged outside the upper and lower coils, and wherein the woofer is coaxially coupled to a lower side of the tweeter so as to let low tone sound generated from a low tone vibration plate of the woofer pass through the hole of the high tone vibration plate of the tweeter.

Abstract: A vibration device, including a shell, a cover plate, a vibrator, a stator and an elastic member, the cover plate is matched with the shell to form accommodating space, the vibrator, the stator and the elastic member are accommodated in the accommodating space, one of the vibrator and the stator includes a magnetic circuit unit while the other one includes a coil. the elastic member includes a first connecting portion fixedly connected with the vibrator, a pair of elastic portions bending and extending from two opposite ends of the first connecting portion, and a pair of second connecting portions extending from a tail end of each elastic portion in the direction facing each other, and the pair of second connecting portions is fixedly connected with the shell to suspend the vibrator in the accommodating space.

Abstract: A MEMS microphone may include a backplate comprising first and second electrodes electrically isolated from one another and mechanically coupled to the backplate in a fixed relationship relative to the backplate and a diaphragm configured to displace relative to the backplate as a function of sound pressure incident upon the diaphragm, the diaphragm comprising third and fourth electrodes electrically isolated from one another and mechanically coupled to the diaphragm in a fixed relationship relative to the diaphragm such that the third and fourth electrodes displace relative to the backplate as a function of sound pressure incident upon the diaphragm. The first and third electrodes may form a first capacitor and the second and fourth electrodes may form a second capacitor, the capacitance of each which may be a function of the displacement of the diaphragm, and each of which may be biased by an alternating-current voltage waveform.

Abstract: The present invention relates to an apparatus for outputting vibration, and an exemplary embodiment of the present invention may provide an apparatus for outputting vibration, the apparatus including: a magnetic circuit which generates vibration; a yoke which is in contact with an upper surface of the magnetic circuit and has a raised spot with different heights in a height direction in at least one of the lateral surfaces of the yoke such that one or more spaces are formed in an upper surface of the yoke; and an elastic body which is in contact with at least a part of the upper surface of the yoke, and vibratorily moves in the one or more spaces, in which the elastic body is formed of a first elastic unit and a second elastic unit, and the first elastic unit and the second elastic unit are integrally molded.

Abstract: A MEMS loudspeaker for generating sound waves in the audible wavelength spectrum includes a carrier substrate with a substrate cavity with two substrate openings formed on two opposite sides of the carrier substrate, and a diaphragm anchored in the substrate. An actuator structure is arranged in the region of one of the two substrate openings and configured to vibrate the diaphragm to generate sound waves. An intermediate cavity is formed in a space between the diaphragm and the actuator structure. A coupling element is disposed in the intermediate cavity and connects the actuator structure to the diaphragm and can vibrate with respect to the carrier substrate.

Abstract: The present disclosure provides a transducer device including a driver and an audio system. The driver includes a diaphragm, a magnet, and a voice coil. The diaphragm vibrates in response to an external force. The magnet provides a magnetic field. The voice coil unit generates an inducing voltage by inducing a variation of the magnetic field in response to a vibration of the diaphragm. The audio system is coupled to the voice coil and includes an audio playing circuit and a wake-up circuit. The audio playing circuit outputs an audio signal to the voice coil unit. The wake-up circuit receives the inducing voltage and boots up the transducer device when the inducing voltage satisfies a predetermined condition.

Abstract: A loudspeaker unit includes: a housing (100), a magnetic assembly (300) disposed in the housing (100), a diaphragm (220) disposed on the housing (100), a first voice coil (210a) connected to the diaphragm (220), and the magnetic assembly (300) is connected to the housing (100) by an elastic element (400). The magnetic assembly (300) vibrates along with the elastic element (300) with respect to the housing (100) when the elastic element (400) vibrates.

Abstract: The present disclosure provides an exterior cover of an electronic device including a cover that protects a display of the electronic device. The cover may include one or more speakers. The cover may be folded one or more times to support the electronic device to be inclined and the speaker may include any one of a film speaker, a vibration speaker, a piezoelectric speaker, and a thin micro speaker. In addition, the exterior cover may include a vibration plate that is arranged thereon and any electronic component may also be arranged on the exterior cover as long as the electronic component is slim.

Abstract: A speaker in the present disclosure includes a magnetic circuit having a magnetic gap, a frame fixed to the magnetic circuit, a voice coil disposed in the magnetic gap, a cylindrical bobbin around which the voice coil is formed, and a diaphragm configured so that the inner circumferential side of the diaphragm is fixed to the bobbin and the outer edge of the diaphragm is supported by the frame with an edge member intervening therebetween. The diaphragm has an elliptical shape that is non-axisymmetric with respect to a center axis passing through the center of the bobbin. The diaphragm is formed by vacuum molding of a sheet-like raw material (thermoplastic CFRP sheet) in which long-fiber fillers are oriented in one direction in a thermoplastic resin. The orientation of the long-fiber fillers is set so as to match the short-axis direction of the diaphragm.

Abstract: A micro sound generating device is provided in the present disclosure. The micro sound generating device includes a vibrating system, a magnetic circuit system, and a frame for receiving and fixing the vibrating system and the magnetic circuit system, the vibrating system comprises a diaphragm, a voice coil driving the diaphragm to vibrate, and a support connected with the voice coil, the diaphragm and the support are located on two opposite sides of the voice coil, respectively, and the support and the frame are formed integrally. At the same time, the present disclosure also provides a method for assembling the micro sound generating device as described above.

Abstract: A method including providing a magnet pot, where the magnet pot comprises a bottom portion and at least one projection extending up from the bottom portion forming a magnet location area, where the at least one projection has first and second portions located on opposite sides of the magnet pot, and where the first and second portions have outer sides with a first distance therebetween; and connecting a frame with the magnet pot, where the frame includes first and second opposite side walls, where the first and second opposite side walls of the frame have outer sides with a second distance therebetween, where the first distance is substantially the same as the second distance, and where the outer sides of the first and second portions of the at least one projection are respectively located at the outer sides of the first and second opposite side walls of the frame.

Abstract: A speaker assembly including a frame and a magnet assembly positioned within the frame. The magnet assembly may include a magnet and a top plate. The assembly further including a sound radiating surface suspended over the magnet assembly. The sound radiating surface includes a flexible circuit. A suspension suspending the sound radiating surface over the magnet assembly is further provided. The suspension may be over molded to the sound radiating surface and the frame. A voice coil extends from a bottom side of the sound radiating surface and electrically connects to the flexible circuit.

Abstract: A speaker frame, including: a vibration support portion supporting a vibrating body of a speaker; a magnet support portion arranged inside of said vibration support portion and supporting magnetic circuit portion of said speaker; and a plurality of connection beams connecting said vibration support portion and said magnet support portion, wherein the vibration support portion and the magnet support portion have a circular ring shape having the same major axis length and minor axis length, said plurality of connection beams are arranged radially centering on a central axis from said magnet support portion to said vibration support portion, the central axis being parallel to a direction of an acoustic radiation, and a length of one of said connection beams and a length of another connection beams are different from each other.

Abstract: Disclosed are a magnetic circuit system for a loudspeaker, and a loudspeaker. The magnetic circuit system for a loudspeaker comprises a magnetically conductive plate (11), a central magnet (12), a central washer (14), a side magnet (13), and a side washer (15). The side washer (15) comprises a washer body (151) and a bent portion (152) continuing from the washer body (151). The washer body (151) is arranged on the surface, away from the magnetically conductive plate (11), of the corresponding side magnet (13). The bent portion (152) is bent towards the magnetically conductive plate (11) from top to bottom via a side face (15a) of the washer body (151). The bent portion (152) and the magnetically conductive plate (11) are fixedly welded together.

Abstract: A vibration sound-generating device comprises a housing and a vibration system and a magnetic circuit system received in the housing, a sound exit hole being provided on a side surface of the housing, wherein the vibration system comprises a vibrating diaphragm, a voice coil and a voice coil framework for connecting the vibrating diaphragm with the voice coil, the voice coil is of a flat structure, and a plane where the voice coil lies is perpendicular to the plane where the vibrating diaphragm lies; the magnetic circuit system comprises magnets, and a plane where the magnets lie is parallel to the plane where the voice coil lies; the vibration sound-generating device further comprises a mass block and an elastic support, and the elastic support suspends the mass block and the magnets in the housing; and the elastic support is an annular structure, the mass block and the magnets are located inside the elastic support, two opposed sides of the elastic support are fixedly connected with the magnets, and the oth

Abstract: An example vibrating body for the acoustic transducer may include a diaphragm including a first vibrating part and a second vibrating part located at an outer circumference of the first vibrating part. A coil is configured to vibrate the diaphragm. An edge portion is located at an outer circumference of the diaphragm. A plurality of ribs are provided outside of the coil on the second vibrating part formed integrally with the second vibrating part. A plurality of ribs is provided on the edge portion formed integrally with the edge portion. None of the integrally formed ribs is provided inside of the coil on the first vibrating part. The ribs provided on the second vibrating part are formed in an inner circumferential side of regions of the edge portion, the regions being located between the ribs provided on the edge portion next to each other.

Abstract: An electroacoustic transducer includes: a diaphragm having two pairs of longitudinal split tubular surfaces; a converter that performs conversion between vibration of the diaphragm and an electric signal; and a supporter supporting the diaphragm. The two pairs of longitudinal split tubular surfaces form valleys and ridge portions. In each pair of the two pairs of longitudinal split tubular surfaces, one-side portions of the respective longitudinal split tubular surfaces form a valley. Another-side portion of the split tubular surface of each one of the two pairs and an other-side portion of the split tubular surface of the other of the two pairs form a ridge portion. The two pairs of longitudinal split tubular surfaces are arranged in at least one of a state in which the valleys are orthogonal to each other and a state in which the ridge portions are orthogonal to each other.

Abstract: An exciter (1) includes a vibrator (2) including a yoke and a magnet, a frame (3) incorporating the vibrator (2) with a damper (4) therebetween, and a voice coil bobbin (5) disposed inside the frame (3) and having another end (5b) that extends to near the vibrator (2) and is provided with a voice coil (11). The frame (3) has an opening (3b), and the voice coil bobbin (5) is mounted on the edge of the opening (3b). One end (5a) of the voice coil bobbin (5) is opened to the outside of the frame (3). The voice coil bobbin (5) is provided with a vibrating member (10) that covers the opened portion.

Abstract: A miniature speaker includes a frame and a vibrating system accommodated in the frame. The vibrating system includes a diaphragm fixed on the frame and a voice coil for driving the voice diaphragm to vibrate. The speaker further includes a magnetic circuit system. The diaphragm includes a first suspension positioned at a middle portion thereof, a second suspension positioned at an edge thereof, and a dome connecting the first suspension with the second suspension; and the magnetic circuit system is connected with the first suspension and is suspended in the frame by the first suspension.

Abstract: A speaker is provided in the present disclosure. The speaker includes a frame with a receiving space, a vibration system and a magnetic circuit system which are received in the frame, wherein the vibration system comprises a diaphragm fixedly connected to the frame, a voice coil for driving the diaphragm to vibrate and a voice coil lead connected with the voice coil; the diaphragm comprises a dome portion in the center, and a suspension portion extended from the dome portion and encircling the dome portion; the dome portion comprises a main body portion connected with the voice coil and an extended portion extended from the main body portion to the outgoing line direction of the voice coil lead; and the central axis of the diaphragm and the central axis of the magnetic circuit system are non-coaxial and parallel.

Abstract: A speaker includes a frame having an accommodation space; a magnetic circuit system accommodated in the accommodation space; and a vibration system accommodated in the accommodation space for generating sound. The vibration system includes a diaphragm and a voice coil. The diaphragm includes a first part fixed with the frame and a second part arranged between the first part and the frame. One end of the second part is connected with the first part. The accommodation space is divided by the second part into a first accommodation space for accommodating the magnetic circuit system and a second accommodation space for accommodating the voice coil.

Abstract: In one embodiment, there is described a new transducer, and in particular an improved system and method for producing linear motion for a transducer such as used in voice coils converting from an electrical input to a mechanical linear motion input.

Abstract: A miniature speaker includes a frame; a vibration system including a diaphragm and a voice coil driving the diaphragm. The diaphragm includes a first fixation part located on a middle position of the diaphragm, a second fixation part located on an edge of the diaphragm and connected fixedly on the frame, and a vibration part connected between the first fixation part and the second fixation part. A magnetic circuit system includes a lower plate and a magnet part on the lower plate. A cover plate includes a bottom wall, and a side wall connected with the second fixation part. A gasket is located between and abuts against the bottom wall and the first fixation part. The gasket, the first fixation part and the magnet part are sandwiched firmly between the bottom wall and the lower plate.

Abstract: A loudspeaker includes a frame, a diaphragm, an edge, a magnetic circuit, and a voice coil body. The magnetic circuit includes a magnet and a bottom plate. The bottom plate includes an installation part and a plurality of arms. The installation part is located on the first side of the magnet and is magnetically connected to the magnet. The arms project from the installation part toward the outer periphery and are connected to the frame.

Abstract: A loudspeaker device includes a frame having a bottom portion with a curved surface along a first direction and a pair of lateral portions provided at lateral sides of the bottom portion in the first direction; a plurality of magnets curved and extended along the curved surface of the bottom portion, and arranged to be spaced apart from each other; a diaphragm supported by the pair of lateral portions, curved in parallel with the curved surface of the bottom portion, and spaced apart at a predetermined distance from top surfaces of the plurality of magnets; and a coil provided on the diaphragm at positions corresponding to spaces between the plurality of magnets in the first direction, the coil being configured to drive the diaphragm to vibrate in a direction perpendicular to the curved surface of the bottom portion of the frame by a magnetic field formed by the plurality of magnets as an audio signal is electrically applied.

Abstract: Methods, systems, and apparatuses are disclosed for laser bond inspection of an angled or compact bonded article.

Abstract: Disclosed is an electroacoustic transducer, comprising a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm and a voice coil; and the magnetic circuit system comprises a yoke, a central magnet, and edge magnets; wherein, each edge magnet has a strip shape, limiting parts are provided at two corners of any edge magnet closer to a magnetic gap, and the yoke is provided with stoppers abutted against the limiting parts at positions corresponding to the limiting parts. Each edge magnet of the present invention is provided with limiting parts formed by removing material, and the yoke is provided thereon with stoppers for preventing the edge magnets from approaching the central magnet, so that a bad phenomenon due to the fact that the edge magnets and the central magnet are attracted to each other can be avoided, thereby increasing the yield of a product.

Abstract: This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments.

Abstract: A loudspeaker includes a longitudinal enclosure having at least one subwoofer speaker for emitting lower sound frequencies; a carrier portion on top of the longitudinal enclosure; and a speaker arrangement having individual speakers for emitting higher sound frequencies arranged in a different direction with respect to the longitudinal enclosure, wherein the speaker arrangement is fixed to the carrier portion and is not surrounded by the longitudinal enclosure.

Abstract: The present disclosure provides a method for testing an apparatus which comprises a set of operational subunits each comprising a moving element, wherein the moving elements move between respective first and second extreme positions, the method comprising: transferring to the apparatus stabilization control commands; transferring to the apparatus first latching-commands for latching to the first extreme position a candidate moving element which is a moving element of a candidate operational subunit; when the first latching control commands are in effect, measuring a first output frequency of an oscillator whose output is coupled to the candidate operational subunit in an electrical coupling setup which causes the output frequency of the oscillator to depend on positions of a plurality of moving elements which comprises the candidate moving element; and based on the first output frequency determining a state of the candidate operational subunit.

Abstract: A vibration unit of a miniature speaker is disclosed that the vibration unit has a diaphragm, a voice coil driving the diaphragm along a vibration direction, and a support around which the voice coil is wound. The support includes a base attached to the diaphragm, and a number of sidewalls each extending from a bound of the base along the vibration direction to a distal end thus forming an edge connecting the distal end and the bound. The support further includes a number of smooth corners formed at the edges of the sidewalls. For forming the smooth corners, each of the sidewalls includes two flanges extending from two edges for protecting the voice coil from being cut broken.

Abstract: A miniature electroacoustic transducer includes: a metal shell, having the shape of a barrel with one open end; a vibrating system, including a vibrating diaphragm and a voice coil; and a magnetic circuit system, including a concentrating flux plate, a magnet and a magnetic yoke that are sequentially combined together. The magnetic circuit system is formed with a magnetic gap corresponding to the voice coil; the vibrating system and the magnetic circuit system are fixedly installed in the barrel-shaped shell; the components in the structure are further modularized, maximizing the magnet under the same product dimension and effectively improving the product sensitivity. An assembling method of the electroacoustic transducer includes: a. providing a barrel-shaped metal shell with one open end; b. putting a pre-assembled vibrating system into the shell; c. putting a pre-assembled magnetic circuit system into the shell; and d. fixedly assembling the shell with the magnetic yoke.

Abstract: A speaker box is disclosed. The speaker box includes a housing including a bottom wall, and a speaker unit accommodated in the housing. The speaker unit includes a magnetic circuit unit having a lower plate, a magnet on the lower plate, an upper plate on the magnet, and a magnetic gap. The lower plate abuts against the bottom wall for forming a space communicated with the magnetic gap. Thus, the air pressure in the magnetic gap is balanced, and the low frequency sound performance is improved.

Abstract: A low profile loudspeaker transducer is presented with an arrangement of placing the motor up near or into the inside concave portion of a convex dome or inverted convex cone diaphragm. In some preferred embodiments the low profile structure is facilitated by an inverted placement of the spider suspension above the plane of the surround suspension to stabilize the voice coil during excursion while supporting a low profile structure. Additionally, in numerous embodiments a coupling structure is utilized between the voice coil former and the diaphragm to create a broad surface area connection to the diaphragm to create a stiffer structure and minimizing breakup modes and creating a more robust mechanical structure to withstand greater output capability.