Abstract: The invention relates to an electromagnetic actuator, which is designed to be connected to a backside of a plate like structure and which comprises an annular coil arrangement and a magnet system being designed to generate a magnetic field transverse to the annular coil arrangement. The annular coil arrangement and the magnet system are connected to each other by a plurality of springs, which are arranged inside of the annular coil arrangement. Furthermore, the invention relates to an output device, comprising a plate like structure and an electromagnetic actuator of the above kind connected to a backside of the plate like structure.

Abstract: A multi-input-driving loudspeaker, including: a frame; a cone arranged on the frame; a main input-driving mechanism; and a plurality of secondary input-driving mechanisms; wherein the main input-driving mechanism is arranged between the plurality of secondary input-driving mechanisms; the main input-driving mechanism includes a main voice coil, a T-yoke, and a front panel and a first magnetic steel sleeved on the T-yoke, a main voice coil mounting hole is provided in the middle of the cone, an upper end portion of the main voice coil is connected to the main voice coil mounting hole; each of the secondary input-driving mechanisms includes a secondary voice coil and a secondary magnetic circuit assembly formed with a secondary magnetic gap, a plurality of secondary voice coil mounting holes are correspondingly provided on the cone, an upper end portion of each secondary voice coil is connected to a corresponding secondary voice coil mounting hole.

Abstract: Acoustic activity detection is provided herein. Operations of a method can include receiving an acoustic signal at a micro-electromechanical system (MEMS) microphone. Based on portions of the acoustic signal being determined to exceed a threshold signal level, output pulses are generated. Further, the method can include extracting information representative of a frequency of the acoustic signal based on respective spacing between rising edges of the output pulses.

Abstract: A gimmick device according to one or more embodiments may include a gimmick and a voice coil motors (VCM). The VCM includes a casing, a permanent magnet, a yoke and iron-core, a bobbin, and a coil part. The gimmick is mounted to the casing on a movable side. The coil part includes a drive and primary coil serving as a drive coil and a primary coil of a displacement sensor including a differential transformer, the drive and primary coil being interlinked with a magnetic flux by the permanent magnet, and two secondary coils of the displacement sensor. The yoke and iron-core may be disposed in a central space defined in the coil part, and serves as an iron core of the displacement sensor.

Abstract: An in-ear device is implemented as part of an audio system to present a user with improved audio content within an artificial reality system. The in-ear device is a fully integrated device with an internal microphone, an external microphone, and a transducer in which portions of the transducer form portions of the body of the device. This integration of transducer into the body of the in-ear device reduces the size of the in-ear device and allows for placement deeper within the ear canal of the user. The transducer generates audio content based on instructions received from an audio system that may be located on a device that is external to the in-ear device. The external microphone provides hear-through functionality, while the internal microphone provides feedback information to the audio system.

Abstract: A microphone assembly includes a housing including a sound port and an external-device interface having a plurality of electrical contacts. An acoustic transducer, such as a MEMS microphone, is disposed in the housing and is in acoustic communication with the sound port. An electrical circuit is disposed in the housing that is electrically coupled to the acoustic transducer and to electrical contacts on the external-device interface. A magnetic transducer including an electrical coil disposed about a core, such as a telecoil or charging coil configuration, is fastened to the housing. The electrical coil having leads, at least one of the leads electrically terminated at a coil contact of the housing.

Abstract: Provided is a speaker device, including a frame; a vibration unit fixed to the frame; and a magnetic circuit unit driving the vibration unit to vibrate and produce sound and including a magnetic gap. The vibration unit includes a diaphragm, a voice coil and an elastic support assembly. The frame includes a bottom wall and a side wall bending and extending from a periphery of the bottom wall of the frame, and an outer periphery of the diaphragm is fixed to the side wall. The vibration unit further includes a fixing ring configured to fix the elastic support assembly to the frame, and the fixing ring surrounds the magnetic circuit unit. The frame is made of a metal material, and the fixing ring is a metal ring fixed to the side wall of the frame by welding. With this structure, overall strength and reliability of the speaker device are improved.

Abstract: Provided is a speaker, including a frame; a vibration unit fixed to the frame; and a magnetic circuit unit driving the vibration unit to vibrate and provided with a magnetic gap. The vibration unit includes a diaphragm fixed to the frame and a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound; an outer periphery of the diaphragm bends and extends to form at least one fixing portion; and the at least one fixing portion extends along a vibrating direction of the diaphragm and is attached to an inner peripheral side of the frame. With this structure, the bonding strength of the frame and the diaphragm is improved, the diaphragm does not occupy an outer space of the frame, and an appearance size of the speaker is effectively controlled, thereby facilitating the miniaturization design.

Abstract: A voice coil motor (VCM) according to one or more embodiments may include a casing, a permanent magnet, a yoke and iron-core, a bobbin, and a coil part. The coil part may include a drive and primary coil serving as a drive coil and a primary coil of a displacement sensor including a differential transformer, the drive and primary coil being interlinked with a magnetic flux by the permanent magnet, and two secondary coils of the displacement sensor. The yoke and iron-core may be disposed in a central space defined in the coil part, and serves as an iron core of the displacement sensor.

Abstract: An in-ear device is implemented as part of an audio system to present a user with improved audio content within an artificial reality system. The in-ear device is a fully integrated device with an internal microphone, an external microphone, and a transducer in which portions of the transducer form portions of the body of the device. This integration of transducer into the body of the in-ear device reduces the size of the in-ear device and allows for placement deeper within the ear canal of the user. The transducer generates audio content based on instructions received from an audio system that may be located on a device that is external to the in-ear device. The external microphone provides hear-through functionality, while the internal microphone provides feedback information to the audio system.

Abstract: The utility model discloses a bone conduction speaker composed of double magnetic fields, which comprises a mechanical conductive sheet, a conduction shell, an outer housing, a coil and a magnetic assembly, wherein the conduction shell comprises a bottom plate and a side wall, and the magnetic assembly comprises a first magnet, a magnetic conductive sheet and a second magnet; the side wall of the conduction shell surrounds the first magnet, the magnetic conductive sheet and the second magnet; and the coil is arranged in a magnetic gap formed between the side wall of the conduction shell and the magnetic assembly. The second magnet can inhibit leakage of magnetic induction field generated by the first magnet, restrain the form of magnetic induction lines passing through the coil, make more of the magnetic induction field pass through the coil as horizontally and densely as possible, and enhance the magnetic induction sensitivity at the coil position.

Abstract: A loudspeaker including a magnetic circuit; a voice coil body; a diaphragm attached to the voice coil body; a housing which accommodates the magnetic circuit and the voice coil body and to which an outer circumferential portion of the diaphragm and the magnetic circuit are attached; two connection terminals disposed exposed inside and outside the housing; and signal wires which extend from the voice coil body and are connected to the connection terminals. Each signal wire is outwardly curved to be away from a virtual straight line connecting the proximal end of the signal wire and the connection portion. The distal end of the signal wire projects from the connection portion toward the voice coil body.

Abstract: A method of assembling a loudspeaker may include resiliently coupling a voice coil assembly to a transducer basket, the voice coil assembly including a voice coil and first and second lead wires having corresponding proximal and distal ends, where the proximal ends of the lead wires are attached to the voice coil. The method also includes forming a first segment of the first lead wire into a first shape, and forming a second segment of the second lead wire into a second shape. The method also includes affixing an intermediate portion of the first lead wire to a first location on the transducer basket, and affixing an intermediate portion of the second lead wire to a second location on the transducer basket. The method also includes conductively coupling the distal ends of the first and second lead wires to a harness configured to directly connect to an amplifier board.

Abstract: A speaker includes a terminal assembly. The speaker includes a magnetic circuit system and a voice coil, and two leads are extended into the voice coil. The terminal assembly is located at a shaft hollow portion of the magnetic circuit system, and the terminal assembly includes a first part, a second part, and two wires. The first part has a T shape, and a T-shaped top portion is attached to an upper plate of the speaker. An upper portion of the second part is correspondingly engaged with a lower portion of the first part. The two wires pass through the first part and the second part, and the two leads are respectively connected to the two wires on the top portion of the first part.

Abstract: The present disclosure provides a speaker, including a holder, a vibration unit, a magnetic circuit unit, and an electrical connection member. The vibration unit includes a diaphragm and a voice coil located at one side of the diaphragm and driving the diaphragm to vibrate and emit sound. The electrical connection member is electrically connected to the voice coil and elastically supporting the voice coil. The electrical connection member includes a support portion supporting an end of the voice coil facing away from the diaphragm, an elastic arm arranged spaced apart from the support portion, and opposite ends of the elastic arm along a side of the voice coil respectively a joint extending from the support portion. The voice coil is sandwiched and fixed between the first extension arm and the second extension arm.

Abstract: A speaker includes a frame, and a vibration system and a magnetic circuit system that are fixed on the frame. The vibration system includes a first vibration diaphragm fixed to the frame, a voice coil disposed on a side of the first vibration diaphragm and configured to drive the first vibration diaphragm to vibrate to produce sound, and an elastic support part for the elastic support coil. The elastic support part includes a flexible printed circuit board connecting the voice coil to an external circuit.

Abstract: A driver structure of a thin speaker contains: a voice coil, a suspension mechanism, at least two wires, a holder, and a magnetic circuit element. The suspension mechanism includes a fixer, a diaphragm, and a spider. The diaphragm is connected with a top of an outer periphery of the fixer, the voice coil is connected with an inner periphery of the diaphragm, the spider is connected with a bottom of an inner periphery of the fixer, and a top of an inner periphery of the spider is in connection with a lower surface of the diaphragm. The at least two wires are connected with the spider and the voice coil. The holder is connected with the fixer and includes a terminal set coupled with the at least two wires. The magnetic circuit element is fixed on the holder, and the voice coil is fitted with the magnetic circuit element.

Abstract: A resonant frequency power generator is disclosed. Specific implementations include a base, a magnet suspended within the base through one or more flexible connectors, and a coil disposed around the magnet. The magnet and one or more flexible connectors may be configured to vibrate at a resonant frequency emitted by a speaker, and the vibration of the magnet may generate electrical power with the coil.

Abstract: A configuration of speaker terminals in a speaker basket. The configuration of speaker terminals has a set of conductive terminals positioned adjacent to one another on a single side of the speaker basket. The set of conductive terminals are coupled between a spider retained in the speaker basket and a connector element, also positioned on the single side of speaker basket.

Abstract: An acoustic transducer can have an acoustic diaphragm defining a barometric vent configured to equalize a barometric pressure-gradient across the acoustic diaphragm. Such a barometric vent can be formed by an aperture through the acoustic diaphragm. A gas-permeable vent membrane can be coupled with the acoustic diaphragm and extend across the aperture. The vent membrane can inhibit movement of liquid across the vent membrane. An acoustic-transducer module can include a chassis a chassis configured to mount the acoustic-transducer module to another module, and a suspension system can movably couple the acoustic diaphragm with the chassis. Such an acoustic-transducer module can sealably couple with a housing of a water-resistant electronic device to inhibit a flow of liquid into the housing while providing a water-resistant barometric vent to the housing, as well as an acoustic diaphragm having a sufficient size to meet or exceed selected acoustic-performance targets.

Abstract: A MEMS device includes a membrane and a counter electrode structure spaced apart from the membrane. The counter electrode structure includes a non-planar conductive layer. The MEMS device includes an air gap between the membrane and the counter electrode structure. The air gap has a non-uniform thickness.

Abstract: The present invention provides methods and systems for a motor assembly that includes a pole piece, at least one magnet, a first magnetizing ring, and an air gap between the pole piece and the first magnetizing ring.

Abstract: A shallow speaker and a method of manufacture for the shallow speaker. The method of assembly uses two different alignment jigs at two different stages of the assembly to ensure alignment of the speaker components. During manufacture, a subassembly of components is created in the speaker frame, and then removed along with the first alignment jig. A second alignment jig is then placed in the speaker, and the bobbin and voice coil added. The subassembly is then connected to the frame, and the voice coil connected to the external connection terminal. Finally, the cone and dust cap are installed.

Abstract: A loudspeaker includes a frame; a vibration system having a membrane, a voice coil for driving the membrane to vibrate, and an elastic support piece opposite to the membrane for elastically supporting the voice coil; a magnetic circuit system. The elastic support piece includes a diaphragm and a flexible circuit board fixedly connected to the diaphragm. The diaphragm includes a first connecting part, a second connecting part and a first folding ring part connecting the first connecting part and the second connecting part. The membrane includes a second folding ring part corresponding to the first folding ring part. The first folding ring part is a convex structure bulging toward the membrane, the second folding ring part is a concave structure sinking toward the diaphragm; the diaphragm and the voice coil transmit electrical signals with the external circuits through the flexible circuit board.

Abstract: Disclosed is an electrical-acoustic transformation device, including: a vibration system and a magnetic circuit system with a magnetic gap; wherein the vibration system includes: a diaphragm, a voice coil provided below the diaphragm and suspending in the magnetic gap, and a piezoelectric plate provided on one side of the diaphragm; and conductive lines are formed on the diaphragm, the conductive lines include a first conductive line connected to the piezoelectric plate to input an externally input first audio signal to the piezoelectric plate via the first conductive line. The electrical-acoustic transformation device in the present invention has a moving coil sound generating structure and a piezoelectric sound generating structure. The piezoelectric plate compensates the high-frequency response of the vibration system, realizing an electrical-acoustic transformation device with good performance and super wideband.

Abstract: The present disclosure provides a speaker, including a frame, a vibrating system and a magnet portion accommodated in the frame, the vibrating system includes a diaphragm and a voice coil which drives the diaphragm to vibrate, the diaphragm includes a first suspension at a central position of the diaphragm, a second suspension at an edge position of the diaphragm and a dome connected between the first suspension and the second suspension, an inner periphery of the first suspension is fixed on the magnet portion, an outer periphery of the first suspension is connected with the dome, an inner periphery of the second suspension is connected with the dome, an outer periphery of the second suspension is fixed on the frame, a stiffness of the first suspension is different from a stiffness of the second suspension. Comparing with the related art, the speaker of the present disclosure guarantees sounding effect.

Abstract: A magnetic circuit includes: a magnet including a first and a second surface; a top plate disposed on the first surface; a bottom plate coupled magnetically with the second surface; and a yoke coupled magnetically with the bottom plate and disposed so as to protrude from the bottom plate along a first direction. The second surface is parallel to the first surface. The first and the second surfaces are magnetized. The yoke includes a magnetic pole face that opposes the top plate. In a portion where the magnetic pole face is formed, of the yoke, a magnetic saturation part is disposed to generate magnetic saturation. The magnetic saturation part has a shape in which an area of a cross section perpendicular to the first direction decreases with nearness to a tip of the yoke along the first direction.

Abstract: A multifunctional speaker includes a frame with an accommodation space; a magnetic circuit system suspended in the accommodation space by the spring plate; a spring plate connected with the frame, one end of the spring plate being fixed at the frame, the other end of the spring plate being fixed at the side wall; and a annular rear cover attached to an end of the frame. The magnetic circuit system includes a magnetic bowl and a magnetic body supported by the magnetic bowl. The magnetic bowl includes a baseplate fixedly connected with the magnetic body and a side wall formed by bending from an edge of the baseplate. A gap is formed between the periphery of the baseplate and the annular rear cover, and the gap has a width between 0.05 and 0.20 mm.

Abstract: A miniature sound generator is disclosed. The miniature sound generator includes a vibration system including a diaphragm and a voice coil arranged below the diaphragm for driving the diaphragm to generate sound, the voice coil having a pair of long axis edges and a pair of short axis edges; a fixing system; and a flexible circuit board elastically supporting the voice coil. The flexible circuit board includes a first fixing part connected with the fixing system, a second fixing part connected to the voice coil, and a plurality of elastic connecting pieces connecting the first fixing part to the second fixing part. The elastic connecting pieces are connected with the long axis edges of the voice coil, and the voice coil is electrically connected with the elastic connecting pieces.

Abstract: A speaker is provided in the present disclosure. The speaker includes a shell, a magnetic system received in the shell, and a vibrating system. The vibrating system includes a membrane and a coil assembly connecting to the membrane for driving the membrane to vibrate. The magnetic system is arranged at two opposite sides of the coil assembly; and the coil assembly is arranged perpendicular to the membrane. The coil assembly includes a coil and a coil support for supporting the coil, the coil support includes a main body and a first extending part extending from an edge of the main body, the coil is supported and fixed to the main body, and the first extending part is connected to the membrane.

Abstract: A vibrating motor is provided in the present disclosure. The vibrating motor includes a shell providing an accommodating space, a vibrating system accommodated in the accommodating space, and a flexible circuit board. The vibrating system includes a coil assembly, and the flexible circuit board includes a fixing part fixed to the shell, a connecting part connected to the coil assembly, and a flexible connecting arm connected between the fixing part and the connecting part.

Abstract: An electro-acoustic driver includes a diaphragm formed of a compliant material, a bobbin configured to hold a winding of an electrical conductor and a housing having a housing axis that is substantially coaxial with the bobbin. The diaphragm is fixed to one end of the housing and has a substantially planar shape when the diaphragm is at rest. A stiffening element is fixed to an inner region of a surface of the diaphragm. A motion of the bobbin along a bobbin axis generates a movement of the inner region of the diaphragm to thereby generate an acoustic signal that propagates from the diaphragm.

Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.

Abstract: The present invention discloses a vibration system of a loudspeaker, comprising a diaphragm and a voice coil attached to one side of the diaphragm, wherein the diaphragm comprises at least two layers of polyether-ether-ketone base films, and furthermore, the diaphragm comprises at least one layer of crystallized polyether-ether-ketone base film and at least one layer of non-crystallized polyether-ether-ketone base film. The diaphragm made of both crystallized and non-crystallized polyether-ether-ketone base films can have both an effectively improved acoustic performance and a lowered resonance frequency f0, thus, the acoustic effect of the loudspeaker can be improved.

Abstract: A speaker is provided in the present disclosure. The speaker includes a shell, a magnetic system and a vibrating system received in the shell. The magnetic system includes a first magnet module and a second magnet module opposite to each other for forming a magnetic gap. The vibrating system includes a membrane module and a coil assembly for driving the membrane module to vibrate. The coil assembly includes a coil arranged in the magnetic gap and a coil support for supporting the coil; at least one of the first magnet module and the second magnet module includes a soft magnet unit, the soft magnet unit is arranged adjacent to the magnetic gap and faces the coil.

Abstract: A speaker is provided in the present disclosure. The speaker includes a membrane, a voice coil connected to the membrane, and a vibration part attached on the membrane. The membrane includes a main body and a periphery portion surrounding the main body. One of the vibration part and the main body includes a protrusion protruding away from the voice coil, and the other one of the vibration part and the main body includes a recess portion recessed towards the voice coil and corresponding to the protrusion.

Abstract: Low-profile electronic component apparatus and methods of manufacturing and utilizing the same, for use with low-profile mobile devices and other applications. In one embodiment, the mobile device comprises a wireless-enabled smartphone, tablet, or laptop computer, and the component comprises an audio speaker which is recessed into a metallic support element, the latter recessed into the mobile device outer housing. The support element is coated with an insulating material, and conductive traces formed thereon for electrical interface with the contacts of the speaker. When assembled, the installation results in a substantially reduced overall vertical profile, thereby both potentially reducing the overall required thickness of the host device, and creating additional volume within the device housing (such as for other components, and/or enhanced audio response of the speaker) resulting in an additional spacing between the speaker component and any extant antenna assemblies.

Abstract: A speaker is provided in the present disclosure. The speaker includes a shell, a magnetic system received in the shell for forming a magnetic gap, and a vibrating system. The vibrating system includes a membrane, a coil assembly for driving the membrane to vibrate. The coil assembly includes a coil arranged in the magnetic gap and a coil support for supporting the coil; the coil includes at least one lead wire. The vibrating system further includes a supporting assembly and a conductive module arranged on the supporting assembly, the coil support is connected between the membrane and the supporting assembly, and the at least one lead wire of the coil is connected to the conductive module on the supporting assembly.

Abstract: A self-cooling loudspeaker including a frame, a diaphragm portion connected to the frame via a surround, an elastic member connected to the frame, a voice coil connected to the diaphragm portion, a magnet assembly connected to the frame, and first and second airflow control members disposed therein for regulating flows generated by the loudspeaker during sound reproduction, where the first and second airflow control members regulate the amount of cool air flowing into the loudspeaker and hot air flowing out.

Abstract: A sensory signal output apparatus, and more particularly to a sensory signal output apparatus includes a bone conduction output apparatus, the sensory signal output apparatus including: the magnetic circuit part 110; the coil part 120; and the case 101 in which the magnetic circuit part and the coil part are accommodated, wherein the sensory signal output apparatus generates a sound or vibration while vibrating, by the magnetic circuit part, depending on a direction of an alternating signal applied to the coil part. The case elastically supports the magnetic circuit part and the coil part so that the magnetic circuit part and the coil part are operated to repeal or attract each other, or in a state where one of the magnetic circuit part and the coil part is fixed, the other vibrates while performing a repulsion or attraction motion.

Abstract: A low-profile speaker that includes a low-profile frame, and a first magnet assembly disposed in the low-profile frame. The first magnet assembly has a first cage and a plurality of magnets disposed in the first cage. The low-profile speaker also includes a support assembly having a cone and a support ring attached to the cone, and a voice coil attached to the support ring. The support ring and voice coil are suspended in relatively close proximity to the magnet assembly such that the support ring and voice coil oscillate in response to electrical signals in the voice coil.

Abstract: A method is provided for making a synthetic jet ejector.

Abstract: A moving-coil electroacoustic transducer is provided which is bar-shaped and includes a vibration system. The vibration system includes a vibration diaphragm, a bar-shaped acoustic coil, an acoustic coil support, and two plucked members. The acoustic coil sleeves the acoustic coil support and is combined with the vibration diaphragm through the acoustic coil support. The acoustic coil support is integrally formed; and includes an acoustic coil mounting portion located in the middle, dampening member mounting portions located at the two ends, and a support portion disposed between two long-axis edges of the acoustic coil mounting portion.

Abstract: Disclosed is a portable electroacoustic device. The device includes a shell having a receiving space; a fixing part received in the receiving part and connected with the shell, and a vibrating unit positioned in the receiving space. The vibrating unit includes a vibrating system and a magnetic circuit system fixed with the fixing part for driving the vibrating system. The magnetic circuit system has a magnetic gap. The vibrating system includes a vibrating plate for driving an external medium to generate resonate, and a voice coil inserted in the magnetic gap for driving the vibrating plate. The shell includes a lower plate having a through hole, the vibrating plate connects with the lower plate and is accommodated in the through hole.

Abstract: An electro-dynamic loudspeaker transducer's motor structure includes a magnetic circuit having a pole with minimal reluctance that allows the use of larger magnets and thicker front plates, thus generating higher flux density in the voice coil gap. The lower reluctance is achieved by increasing the pole piece's outside diameter at all points outside of the voice coil gap and the area swept out by the voice coil at maximal inward excursion. Increasing the pole's diameter over a substantial amount of the pole's distally projecting length (but not extending into the magnetic gap), provides an increased cross sectional area and a reduced magnetic circuit reluctance.

Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.

Abstract: This invention relates to acoustic transducers with stationary and moving coils, and methods for operating the acoustic transducers. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces sound. The time varying signal applied to the moving coil corresponds to at least a processed version of an input audio signal and is updated based on, at least, a version of the time varying signal applied to the stationary coil. Some embodiments include updating the processed version of the input audio signal in response to a magnetic flux value corresponding to the time-varying signal applied to the stationary coil. Some embodiments include updating the time-varying signal applied to the moving coil in response to a feedback signal.

Abstract: The present invention relates to a flat-type speaker, and more specifically, to a flat-type speaker in which a plurality of magnetic circuits are horizontally connected in serial or in parallel such that one speaker is formed.

Abstract: A loudspeaker includes: a frame; a yoke fixed to the frame; a magnet fixed to the yoke; a plate fixed to an upper surface of the magnet which is opposite to a surface of the magnet which is fixed to the yoke; a vibratable voice coil arranged in a first magnetic gap formed between the yoke and the plate; a diaphragm having an outer-edge portion joined to the voice coil; and a support member supporting the diaphragm in a vibratable manner, and composed of edges, one end of each edge being fixed to the frame. The plate is composed of: a flat-plate part fixed to the upper surface of the magnet, and having, at an upper surface thereof, a planar portion extending from the outer-edge portion up to a predetermined distance; and a protruding part disposed on the flat-plate part excluding the planar portion, and protruding toward the diaphragm.

Abstract: The present invention discloses a moving-coil electroacoustic transducer, which is bar-shaped, and comprises a vibration system. The vibration system comprises a vibration diaphragm, a bar-shaped acoustic coil, an acoustic coil support, and two plucked members. The acoustic coil sleeves the acoustic coil support and is combined with the vibration diaphragm through the acoustic coil support. The acoustic coil support is integrally thrilled, and comprises an acoustic coil mounting portion located in the middle, plucked member mounting portions located at the two ends, and a support portion disposed between two long-axis edges of the acoustic coil mounting portion.