Abstract: A loudspeaker comprising: an acoustic diaphragm having front and rear surfaces, the acoustic diaphragm in use being driven so as to vibrate and radiate acoustic waves from its front surface in a forward direction away from the loudspeaker and from its rear surface in a rearward direction, and a drive unit located rearwardly or to the front/outside of the diaphragm, there being at least one open duct leading in a rearward direction away from the diaphragm, in which the at least one open duct has a cross-sectional area which decreases in the rearward direction, and in which acoustic waves radiated from the rear surface of the diaphragm pass through the open duct before contacting a front surface of an acoustic metamaterial absorber located generally behind the drive unit and immediately to the rear of the duct.

Abstract: The systems and methods described herein relate to, among other things, a transducer capable of producing acoustic and tactile stimulation. The transducer includes a rigid mass element disposed on the diaphragm of a speaker. The mass element may optionally be removable and may have a mass selected such that the resonant frequency of the transducer falls within the range of frequencies present in an input electrical audio signal. The systems and methods advantageously benefits from both the fidelity and audio performance of a full-range speaker while simultaneously producing high-fidelity, adjustable and palpable haptic vibrations.

Abstract: A non-dispensing manufacturing process includes forming a paper cone; engaging the paper cone with a voice coil to form a vibration assembly; fixing a yoke, a magnet set, and a washer to form a magnetic circuit assembly; engaging a basket with the magnetic circuit assembly; and engaging the basket with the vibration assembly to form a speaker, where no glue is used in the manufacturing process. A speaker includes a paper cone; a voice coil engaged with the paper cone to form a vibration assembly, where a junction between a bobbin of the voice coil and the paper cone has a first welding layer; a magnetic circuit assembly including a yoke, a magnet set, and a washer that are integrally fixed; and a basket engaged with the magnetic circuit assembly and the vibration assembly.

Abstract: A loudspeaker diaphragm (12) comprising a woven fibre body supports damping material (25), for example PVA polymer, on a rearward-facing surface (24). The woven fibre body may be formed of lengths (14) non-metallic fibre material (for example glass fibre) coating with a thin metal coating (32). The mass of the layer of damping material (25) may be less than the mass of the woven fibre body. An attractive sparkly looking loudspeaker diaphragm (12) may thus be provided which damps undesirable vibration whilst providing a flatter frequency-response curve (50).

Abstract: Disclosed herein is a speaker. The speaker includes a magnetic circuit device provided to generate a magnetic force, a voice coil configured to vibrate by the magnetic circuit device, and a damper configured to guide a movement of the voice coil, wherein the damper comprises a first portion, and a second portion having a different weave than the first portion.

Abstract: A loudspeaker arrangement having a first loudspeaker comprising a first sound radiating surface and a first loudspeaker basket, and a second loudspeaker comprising a second sound radiating surface and a second loudspeaker basket. The first loudspeaker and the second loudspeaker are arranged opposite each other in a first direction, a cavity is formed between a front side of the first loudspeaker and a front side of the second loudspeaker, and the first loudspeaker basket is directly coupled to the second loudspeaker basket.

Abstract: An example magnet assembly for a loudspeaker includes a first permanent magnet with a cuboid shape, the first magnet encompassing a central opening, and a second permanent magnet with a cuboid shape, the second magnet positioned coaxially within the opening of the first magnet and forming a rectangular-ring shaped first gap therebetween, the first and second magnets being axially poled in opposed directions. The assembly further includes a soft-magnetic base plate connected across one side of the first and second magnets, a soft-magnetic first pole piece having a first face and positioned on the first magnet, and a soft-magnetic second pole piece having a second face and positioned on the second magnet. The first pole piece and the second pole piece form a rectangular-ring shaped second gap between the first and second faces such that magnetic flux is focused in the second gap.

Abstract: A loudspeaker diaphragm (12) comprising a woven fibre body supports damping material (25), for example PVA polymer, on a rearward-facing surface (24). The woven fibre body may be formed of lengths (14) non-metallic fibre material (for example glass fibre) coating with a thin metal coating (32). The mass of the layer of damping material (25) may be less than the mass of the woven fibre body. An attractive sparkly looking loudspeaker diaphragm (12) may thus be provided which damps undesirable vibration whilst providing a flatter frequency-response curve (50).

Abstract: A panel audio loudspeaker includes a panel extending in a plane. The loudspeaker also includes an actuator coupled to one side of the panel and configured to couple vibrations to the panel to cause the panel to emit audio waves. The actuator includes a rigid frame attached to a surface of the panel, the rigid frame includes a portion extending perpendicular to the panel surface and a plate extending parallel to the panel. The actuator also includes a magnet assembly and a magnetic coil forming a magnetic circuit. The actuator further includes at least one flexible member connecting the magnetic circuit to the portion of the rigid frame extending perpendicular to the panel surface. The actuator also includes a compliant member positioned between the magnetic circuit and the panel, the compliant member being configured to increase output of the loudspeaker compared to the actuator without the compliant member.

Abstract: A diaphragm for a loudspeaker may include a conductive coupler, a voice coil having a voice coil lead, where the voice coil lead is positioned in conductive contact with the conductive coupler, and a terminal lead, where the terminal lead is positioned in conductive contact with the conductive coupler, and where the voice coil lead and the terminal lead are attached to the conductive coupler.

Abstract: A loudspeaker diaphragm (12) comprising a woven fibre body supports damping material (25), for example PVA polymer, on a rearward-facing surface (24). The woven fibre body may be formed of lengths (14) non-metallic fibre material (for example glass fibre) coating with a thin metal coating (32). The mass of the layer of damping material (25) may be less than the mass of the woven fibre body. An attractive sparkly looking loudspeaker diaphragm (12) may thus be provided which damps undesirable vibration whilst providing a flatter frequency-response curve (50).

Abstract: An earphone has a membrane mounted on a membrane carrier and arranged between a top space and a bottom space; a membrane actuator implemented to deflect the membrane in dependence on a control signal; a housing where the membrane carrier, the membrane and the membrane actuator are arranged, wherein the housing has a sound exit, wherein the membrane carrier has openings, and wherein the membrane has holes, and wherein the openings and the holes connect the top space and the bottom space to each another, such that gas can move through the openings and holes between the top space and the bottom space.

Abstract: Multi-layer composites and methods of using the composites as a membrane for electroacoustic transducers. The composites and methods comprise at least one first and one second outer layer, wherein at least one of the cover layers being made from a polypropylene sulfide-plastic having a halogen content not exceeding 550 ppm.

Abstract: An electronic device is provided which includes a sliding groove, a speaker and a sound conditioner. The first sound outlet and the second sound outlet are connected to the sliding groove and respectively positioned adjacent to the first side wall and the second side wall of the sliding groove. The speaker is positioned relative to the first sound outlet. The sound conditioner extends along the sliding groove for a length that is greater than the distance between the first sound outlet and the second sound outlet. The sound conditioner is slidably positioned in the sliding groove so as to allow the sound produced by the speaker to be transmitted to the outside via either the first sound outlet or the second sound outlet.

Abstract: A microphone including a casing having a front wall, a back wall, and a side wall joining the front wall to the back wall, a transducer mounted to the front wall, the transducer including a substrate and a transducing element, the transducing element having a transducer acoustic compliance dependent on the transducing element dimensions, a back cavity cooperatively defined between the back wall, the side wall, and the transducer, the back cavity having a back cavity acoustic compliance. The transducing element is dimensioned such that the transducing element length matches a predetermined resonant frequency and the transducing element width, thickness, and elasticity produces a transducer acoustic compliance within a given range of the back cavity acoustic compliance.

Abstract: According to one aspect, there is provided an apparatus comprising a frame and a speaker rigidly attached to the frame, where the speaker comprises a display module and at least one vibrating deformable plate element attached to a bottom surface of the display module and configured to at least partially bend, when actuated, the display module to generate at least one of sound waves or tactile feedback.

Abstract: The present application provides a loudspeaker diaphragm, comprising a first surface layer, a middle layer and a second surface layer, that are in a stacked structure. The loudspeaker diaphragm is characterized in that: at least one surface layer of the first surface layer and the second surface layer has a composite structure which is composed of a base layer and a reinforcing layer, and the other surface layer comprises a base layer; the base layer is a poly(ether-ether-ketone) layer, a polyarylester layer, a polyethylene terephthalate layer, a polyetherimide layer or a composite structure composed of any two of the above layers, and the reinforcing layer is a thermoplastic polyurethane elastomer layer or a thermoplastic elastomer layer. The loudspeaker diaphragm can reduce diaphragm breakage after power test is performed on a loudspeaker product, improve substrate toughness and improve acoustical property of the loudspeaker.

Abstract: An electronic device in which a vibration generator is attached to a panel allows further improvement in sound pressure characteristics. An electronic device (1) includes a housing (60), a panel (10) held by the housing (60), a vibration generator (30) attached to the panel (10), and a sheet member (80) between the housing (60) and the panel (10). The panel (10) deforms due to deformation of the vibration generator (30) to transmit human body vibration sound to an object that contacts the panel (10). A first portion of the sheet member (80) is joined to the panel (10), and a second portion of the sheet member (80) differing from the first portion is joined to the housing (60). Between the first portion and the second portion, the sheet member (80) includes an area to which neither the panel (10) nor the housing (60) is attached.

Abstract: Some embodiments of the present invention provide miniature sounder which includes a frame and a vibration system and a magnetic path system fixedly connected to the frame. The magnetic path system includes a lower clamping board, a primary magnet disposed on the lower clamping board, secondary magnets disposed on the lower clamping board and arranged around the primary magnet, and a cushion provided on the lower clamping board and located outside the secondary magnets, a gap being provided between two adjacent secondary magnets. The vibration system includes a voice diaphragm, a voice coil which drives the voice diaphragm to vibrate and generate a sound, and a vibrating diaphragm which elastically supports the voice coil. The vibrating diaphragm includes a first connecting portion connected to the voice coil, a second connecting portion connected to the cushion, and a corrugated rim connecting the first connecting portion and the second connecting portion.

Abstract: A loudspeaker diaphragm, comprising a dome portion located at central position and a suspension ring portion located at edge position; the dome portion and/or the suspension ring portion comprise silk fabric and thermoplastic polyurethane combined with the silk fabric; and the silk fabric is coated with thermosetting adhesive. The method for manufacturing the loudspeaker diaphragm comprises following steps: a. coating the silk fabric with a thermosetting adhesive under a high temperature, and drying the silk fabric; b. hot pressing and combining the silk fabric and thermoplastic polyurethane to form a membrane; c. pressing the membrane to form the dome portion and/or the suspension ring portion. The dome portion, or both the dome portion and the suspension ring portion of the loudspeaker diaphragm comprise silk fabric coated with a thermosetting adhesive and thermoplastic polyurethane.

Abstract: A transducer system includes a panel having one or more piezo-electric enabled foils and an arrangement of electric contacts coupled to the panel. The one or more piezo-electric enabled foils and the arrangement of electric contacts define a plurality of transducers thereon. Each transducer is associated with a respective region of the panel and with at least two electric contacts that are coupled to at least two zones at that respective region of the panel. The electric contacts are adapted to provide an electric field in these at least two zones to cause different degrees of piezo-electric material deformation in these at least two zones and to thereby deform the respective region of the panel in a direction substantially perpendicular to a surface of the panel, and to thereby enable efficient conversion of electrical signals to mechanical vibrations (acoustic waves) and/or vice versa.

Abstract: A waveguide for conducting sound that is generated by a loudspeaker that is acoustically coupled to the waveguide. There is a duct with an external wall, an interior opening circumscribed by the wall, and an outlet, and an air-adsorbent structure coupled to an inside of the external wall of the duct such that the air adsorbent structure lines at least a portion of the wall. The apparent volume ratio of the air adsorbent structure is at least about 1.5.

Abstract: An energy conversion apparatus including a permanent magnet fixed to a predetermined region; and a diaphragm arranged on the permanent magnet, the diaphragm including a coil having a conductor wire pattern formed on the diaphragm, wherein the diaphragm includes a slit formed in the diaphragm.

Abstract: Embodiments are provided for configurations of a loudspeaker. The loudspeaker may include a frame, a magnetic structure having a magnetic gap, a voice coil suspended within the magnetic gap, a first suspension element, a diaphragm, and a second suspension element. The first suspension element may have an inner rim and an outer rim attached to the frame. The diaphragm may have an outer portion and a continuous central portion attached to the voice coil via a first coupler. The outer portion of the diaphragm may be attached to the inner rim of the first suspension element. The second suspension element may have an inner rim and an outer rim attached to the frame. The inner rim of the second suspension element may be attached to the diaphragm via a second coupler along a circumferential middle section of the diaphragm between the continuous central portion and outer portion of the diaphragm.

Abstract: A “free swinging” acoustical ribbon transducer with increased vibrating ribbon element reliability, power handling, and extended useful frequency range. This performance is achieved by forming the corrugations in the vibrating ribbon element at an angle in a range of approximately 45 degrees to 75 degrees with respect to the transverse direction, and preferably in a range of 54 degrees to 74 degrees with respect to the transverse direction.

Abstract: The present invention provides a tablet woofer, including: a vibration diaphragm, at least four mutually independent driving units, and a housing for accommodating and securing the vibration diaphragm and the driving unit. The driving unit includes independent voice coil units and magnetic circuit units, the voice coil units being attached and fixed to the vibration diaphragm. The woofer further includes a FPCB communicating with an internal circuit and an external circuit, and the FPCB is disposed at two sides of the housing, the part of the FPCB disposed on the side of the housing close to the voice coil units being electrically connected to the voice coil units, the part of the FPCB disposed on the side of the housing far away from the voice coil units being electrically connected to the external circuit. The woofer can solve the problems of thick and heavy voice coils and magnet performance surplus.

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

Abstract: A loudspeaker (100) comprising: an electro-magnetic motor (114) configured to receive electrical signals and, based on the received electrical signals to induce vibrations in a diaphragm (116) for generating a pressure wave; a surround (118) connected to the diaphragm for suspending the diaphragm from a driver chassis (120); and a damper (126) in contact with the surround for damping the vibrations in the surround and the diaphragm.

Abstract: The invention relates to a vane cell pump comprising an electrical pump unit that has a pump chamber into and out of which a fluid can flow and also a rotor with a number of vanes to compress the fluid before flowing out from the pump chamber. The vane cell pump also comprises a sound-damping mechanism into which the fluid can flow after flowing through the pump chamber and that has a sound-damping cover attached to a part of the pump chamber and defining a sound-damping volume. A preliminary sound-damping mechanism with at least one preliminary sound-damping outlet from which the fluid can flow may be arranged within the sound-damping volume, wherein the preliminary sound-damping outlet has a cross-sectional profile tapering in the direction of fluid outflow.

Abstract: A device used for generating mechanical vibrations which includes at least one partially elastic closed shaped frame, a coil affixed to a first edge of the closed shaped frame, and an array fixed to a second edge of the closed shaped frame, where the array includes one or more magnets, and the closed shaped frame is configured to restrain the array and coil into an optimal relative position to limit movement of at least one of the coil and the array to a predefined path, where the movement is resultant upon an alternating current being applied to the coil so as to induce mechanical movement between the array and the coil.

Abstract: The present disclosure relates to a diaphragm that may be used with a mechanical-to-acoustical transducer. The diaphragm may include a layer of optically clear film, a damping layer and another layer of optically clear film. The damping layer may be an adhesive. The diaphragm may also comprise two optically clear films, optionally including a damping layer, wherein the films indicate a desired coefficient of linear thermal expansion in one or both of the machine and transverse directions.

Abstract: A canalphone system may include a canalphone housing, and a low audio sound-tube to carry a low audio signal to the canalphone housing's outside. The system may also include a high audio sound-tube to carry a high audio signal to the canalphone housing's outside, the high audio sound-tube phase corrected with respect to the low audio sound-tube by sizing it to be longer than the low audio sound-tube, and the high audio sound-tube's length is greater than 3 millimeters but less than 10 millimeters.

Abstract: A loudspeaker radiating diaphragm can be stiffened to help increase the breakup frequency to above the working frequency range of the driver concerned, by forming it of a molded part and an attached formed part. The molded part is a radiating surface with stiffening ribs. The formed part is a thin surface of high modulus material, attached to the rear of the ribs. The overall structure can have significantly higher stiffness than either of the two parts. This helps in designing a loudspeaker driver that does not breakup within its working frequency range.

Abstract: A canalphone system may include a high audio driver carried by a canalphone housing, and a low audio driver carried by the canalphone housing adjacent to the high audio driver. The system may also include an acoustical-timer to phase correct a high audio signal from the high audio driver directed to the outside of the canalphone housing with delivery of a low audio signal from the low audio driver directed to the outside of the canalphone housing.

Abstract: A loudspeaker is disclosed, comprising a driven body and a suspension for providing a restoring force to the driven body, the suspension having a cup geometry wherein its attachment point on the fixed portion of the loudspeaker is displaced along the axis of motion relative to its attachment point on the driven body and comprising a first concentric region that is extendible to allow reciprocating axial movement of the driven body, a second concentric region which extends transversely from the first region toward one of the attachment points, and a circumferential member affixed to the suspension at a location between the first and second concentric regions, the circumferential member being relatively stiff compared to the material forming the first and second concentric regions.

Abstract: A cone speaker that outputs audio by transmitting to a truncated cone, the movements of a voice coil driven when an audio current is transmitted through a voice coil placed inside a magnetic circuit formed in a space that surrounds a pole piece. Inside a space between the back surface of a center cap attached to a central portion of the cone and the apical surface of the pole piece that faces the center cap, a first filling material composed of a flexible porous body with a low porosity fills the periphery of the space and a second filling material composed of a flexible porous body with a higher porosity than the first filling material fills the central portion thereof.

Abstract: A damper speaker includes a fiber cloth woven by fibers, each of the fibers is formed by a single fiber strand or several fiber strands. The fiber strand includes a first fiber, which is one or a combination of cotton, polyester and aramid fiber. When the first fiber is the combination of cotton, polyester and aramid fiber, the weight ratio of any one to the fiber cloth is 0˜100%, and the weight ratio of the other two is adjusted. When the weight ratio of the first fiber to the fiber cloth is less than 100%, the fiber cloth includes a second fiber, which is one or a combination of rayon, silk, flax, acrylic, rubber and synthetic fiber. The speaker damper includes a layer of resin, which is absorbed by and combined with the fiber cloth. The fiber cloth is then cut into a predetermined shape through a molding means.

Abstract: The present disclosure relates to a diaphragm that may be used with a mechanical-to-acoustical transducer. The diaphragm may include a layer of optically clear film, a damping layer and another layer of optically clear film. The damping layer may be an adhesive. The diaphragm may also comprise two optically clear films, optionally including a damping layer, wherein the films indicate a desired coefficient of linear thermal expansion in one or both of the machine and transverse directions.

Abstract: The present invention relates to a sound converter, and, more particularly, to a sound converter which can solve a problem in that a vibration space decreases in the sound converter requiring high outputs, as the overall height of a voice coil increases.

Abstract: A damper speaker includes a fiber cloth woven by fibers, each of the fibers is formed by a single fiber strand or several fiber strands. The fiber strand includes a first fiber, which is one or a combination of cotton, polyester and aramid fiber. When the first fiber is the combination of cotton, polyester and aramid fiber, the weight ratio of any one to the fiber cloth is 0˜100%, and the weight ratio of the other two is adjusted. When the weight ratio of the first fiber to the fiber cloth is less than 100%, the fiber cloth includes a second fiber, which is one or a combination of rayon, silk, flax, acrylic, rubber and synthetic fiber. The speaker damper includes a layer of resin, which is absorbed by and combined with the fiber cloth. The fiber cloth is then cut into a predetermined shape through a molding means.

Abstract: A diaphragm for a loudspeaker including a plurality of masses, each mass being substantially the same radial distance from the center of the diaphragm, the plurality of masses being divided into two arrays, each array including one or more individual masses, wherein, in use, at a selected frequency, the pair of arrays act to produce a dominant bending moment, and, the center of the diaphragm lies substantially on the axis of the dominant bending moment, wherein, the dominant bending moment is the bending moment produced by the combination of masses which has the greatest magnitude, if they produce more than one bending moment.

Abstract: A canalphone system may include a high frequency sound bore carried within a canalphone. The system may also include a low frequency sound bore adjacent to the high frequency sound bore to form a single unit, the low frequency sound bore and the high frequency sound bore being sized so that the low frequency sound bore and the high frequency sound bore each deliver sound with similar time and phase. The system may further include a high acoustical driver carried within the canalphone where the high acoustical driver delivers sound through the high frequency sound bore. The system may additionally include a low acoustical driver carried within the canalphone where the low acoustical driver delivers sound through the low frequency sound bore.

Abstract: A loudspeaker includes a diaphragm that vibrates back and forth to emit a sound, a magnetic circuit that is provided on a rear side of the diaphragm and has a magnetic gap on a diaphragm side, and a voice coil that is directly or indirectly joined to the diaphragm and disposed within the magnetic gap. A magnetic fluid is loaded within the magnetic gap. Also, a plurality of first edge pieces are provided at different positions in an outer circumferential portion of the diaphragm for vibratably supporting the diaphragm, each of the first edge pieces having a non-linear cross-sectional shape.

Abstract: A loudspeaker includes a diaphragm that vibrates back and forth to emit a sound, a magnetic circuit that is provided on a rear side of the diaphragm and has a magnetic gap on a diaphragm side, and a voice coil that is directly or indirectly joined to the diaphragm and disposed within the magnetic gap. A magnetic fluid is loaded within the magnetic gap. Also, a plurality of first edge pieces are provided at different positions in an outer circumferential portion of the diaphragm for vibratably supporting the diaphragm, each of the first edge pieces having a non-linear cross-sectional shape.

Abstract: A canalphone system may include a high frequency sound bore carried within a canalphone. The system may also include a low frequency sound bore adjacent to the high frequency sound bore to form a single unit, the low frequency sound bore and the high frequency sound bore being sized so that the low frequency sound bore and the high frequency sound bore each deliver sound with similar time and phase. The system may further include a high acoustical driver carried within the canalphone where the high acoustical driver delivers sound through the high frequency sound bore. The system may additionally include a low acoustical driver carried within the canalphone where the low acoustical driver delivers sound through the low frequency sound bore.

Abstract: The present invention relates to a sound converter, and, more particularly, to a sound converter which can solve a problem in that a vibration space decreases in the sound converter requiring high outputs, as the overall height of a voice coil increases.

Abstract: An apparatus and method for providing a downhole acoustic source is disclosed. The acoustic source includes a piston configured to oscillate in an axial direction of the acoustic source and produce an acoustic signal in a medium in contact with an exterior surface of the piston, and an elastomer disposed on an interior side of the piston, an acoustic impedance of the elastomer selected to match an acoustic impedance of the piston. A permanent magnet is configured to provide a permanent magnetic field oriented in the axial direction, and a coil disposed on an interior side of the piston produces an alternating magnetic field in the region of the permanent magnetic field. The elastomer may be, for example, a silicon rubber, a silicone jelly, and a silicone oil. A plurality of acoustic sources may be arranged to produce an acoustic dipole configuration or an acoustic quadrupole configuration.

Abstract: The present disclosure relates to a diaphragm that may be used with a mechanical-to-acoustical transducer. The diaphragm may include a layer of optically clear film, a damping layer and another layer of optically clear film. The damping layer may be an adhesive. The diaphragm may also comprise two optically clear films, optionally including a damping layer, wherein the films indicate a desired coefficient of linear thermal expansion in one or both of the machine and transverse directions.

Abstract: The present disclosure relates to a diaphragm that may be used with a mechanical-to-acoustical transducer. The diaphragm may include a layer of optically clear film, a damping layer and another layer of optically clear film. The damping layer may be an adhesive. The diaphragm may also comprise two optically clear films, optionally including a damping layer, wherein the films indicate a desired coefficient of linear thermal expansion in one or both of the machine and transverse directions.

Abstract: A damper for a speaker for vibratably supporting a voice coil to a static part includes a first damper and a second damper formed in an annular shape having an inner periphery part and an outer periphery part, respectively. The first and second dampers are formed in a shape expandable and contractable in a direction crossing a circumferential direction of the annular shape. The inner periphery part of the second damper is connected to the first damper between the inner periphery part and the outer periphery part of the first damper, and each outer periphery part of the first damper and the second damper is connected to each other such that annular space is formed between the first damper and the second damper.