Abstract: A dome material, a diaphragm and a speaker are provided. The speaker includes the diaphragm made of the dome material. The dome material includes an intermediate layer, an adhesive layer, a film layer, and a surface layer. The adhesive layer, the film layer, and the surface layer are sequentially stacked on the intermediate layer in a direction away from the intermediate layer. The intermediate layer is formed by a foamed material. A thickness of the adhesive layer is 3-20 ?m. The film layer is adhered to the intermediate layer via the adhesive layer. A thickness of the film layer is 2-20 ?m. The surface layer adopts fiber prepreg including fiber and resin, the fiber is unidirectionally arranged, and a weight percentage of the fiber is 20%-50%. A surface density of the fiber prepreg is 10-100 g/m2.

Abstract: The present invention relates to a membrane plate structure for generating sound waves, the membrane plate structure comprises a vibrating element for generating sound waves and a membrane plate which is coupleable to the vibrating element. The membrane plate has a different width with respect to its length, wherein the width is shorter than the length. The membrane plate comprises an UD layer made of fibers, wherein the fibers of the UD layer are oriented along the width of the membrane plate.

Abstract: A vibration component for loudspeakers includes a base layer, an intermediate layer, and a coating layer. The base layer has a front face and a rear face, has a first density, and is formed of a paper body containing a plurality of fibers. The intermediate layer has a first face joined to the front face of the base layer, and a second face on a reverse side of the intermediate layer from the first face, has a second density higher than the first density, and includes a plurality of cellulose fibers as a main component. The coating layer is provided on the second face of the intermediate layer, and includes an inorganic powder formed of a plurality of inorganic fine particles.

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

Abstract: A good output state of sound is ensured without a cost increase. A speaker unit includes: a vibration plate; a magnetic circuit; a bobbin to which an inner peripheral portion of the vibration plate is attached and which is varied in an axial direction by the magnetic circuit; and a cap attached to the vibration plate and located to face the bobbin in the axial direction of the bobbin, in which a center axis of the bobbin is arranged in a state of being inclined with respect to a horizontal plane or a vertical plane, and the cap is formed in a shape eccentric to the center axis of the bobbin. Thus, since the cap is eccentric to the center axis in a state in which the center axis of the bobbin is inclined with respect to the horizontal plane or the vertical plane, it is possible to freely control a pointing direction in an inclined direction, good directivity characteristics can be obtained, and a good output state of sound can be ensured without a cost increase.

Abstract: The present disclosure provides a vibration diaphragm. The vibration diaphragm includes a central dome part; a suspension part surrounding the dome part; a number of first reinforcing parts disposed on the suspension part; a number of second reinforcing parts disposed on the suspension part and being adjacent to the first reinforcing parts. The second reinforcing part includes a first master extension part and a first slave extension part, and the first master extension part and the first slave extension part cross with each other.

Abstract: Provided are an actuator fixing device and a panel vibration type sound-generating display device including the same. A display device includes: a display panel configured to display an image, a cover bottom configured to cover the display panel, and a plurality of sound-generating actuators supported by the cover bottom, the sound-generating actuators being configured to vibrate the display panel to generate sound, at least two of the sound-generating actuators being adjacent to each other.

Abstract: An acoustic apparatus may include a frame having an annular open portion that opens in an axial direction; a diaphragm supported by being attached to the annular open portion via a flexible edge member so as to be capable of vibrating in the axial direction; and a driving unit connected to the diaphragm at a center portion of the diaphragm, where the driving unit is configured to apply a driving force in the axial direction to the diaphragm. The diaphragm has a rotationally symmetric shape around an axis of the diaphragm when viewed in the axial direction. The diaphragm includes a sheet member having an orientation dispersion structure in which shape-anisotropic fillers are dispersed in a resin with long axes of the fillers oriented in one predetermined direction, and the diaphragm has mechanical characteristics having two-fold rotation symmetry around the axis.

Abstract: Provided are an actuator fixing device and a panel vibration type sound-generating display device including the same. A display device includes: a display panel configured to display an image, a cover bottom configured to cover the display panel, and a plurality of sound-generating actuators supported by the cover bottom, the sound-generating actuators being configured to vibrate the display panel to generate sound, at least two of the sound-generating actuators being adjacent to each other.

Abstract: The present invention provides a stiffener-integrated flexible printed circuit board that has excellent electrical insulation reliability and that prevents the stiffener from being detached during a reflow process. The stiffener-integrated flexible printed circuit board including: (A) a stiffener, (B) a thermosetting adhesive, (C) an insulator film, and (D) a wiring-pattern-equipped film, (A) the stiffener, (B) the thermosetting adhesive, (C) the insulator film, and (D) the wiring-pattern-equipped film being laminated in this order, (C) the insulator film containing at least (a) a binder polymer and (b) a black coloring agent having a reflective range within the infrared range.

Abstract: The present disclosure provides a carbon fiber dome. The carbon fiber dome includes at least two carbon fiber prepreg layers. The at least two carbon fiber prepreg layers include carbon fiber prepregs made by at least two weaving methods. In addition, the present disclosure provides a method for manufacturing the carbon fiber dome as described above. The method includes the following steps: using prepreg resin to pre-impregnate carbon fiber materials made by at least two weaving methods; and pre-impregnating the carbon fiber materials made by at least two weaving methods for bonding each other.

Abstract: A display device includes a display panel having first, second, and third areas; at least three sound generating actuators including first, second, and third actuators each spaced apart from the other two in a long axis direction of the display panel, wherein the first, second, and third actuators each contact the display panel at the first, second, and third areas, respectively, to generate sound by vibrating the display panel; and a support structure at a rear side of the display panel configured to support the at least three sound generating actuators.

Abstract: An elastic composite structure for a speaker vibrating member, includes a vibrating member body, a resin base material and a gum material. The vibrating member body is provided with fibers that are interwoven with each other. The resin base material is coated over an outer side of the fibers for the fibers to keep a predetermined stiffness. The gum material is coated over and combined with the resin base material to form the elastic composite structure to maintain a predetermined resilience and ductility of the fibers. With such a structure, the resonance noise generated during the vibration of resin base material and speaker vibrating member may be reduced.

Abstract: The invention relates to a suspension device for a loudspeaker, comprising an annular outer edge that is able to fasten the suspension device to a frame, an annular inner edge that is able to fasten the suspension device to a membrane, a suspension hoop that extends annularly between the edges, said suspension hoop being able to absorb movement stresses produced at the inner edge by means of a deformation that thus forms a resonance mode, the suspension hoop comprising at least one annular protuberance that is positioned so as to minimize the at least one resonance mode of the suspension hoop, the mass of the at least one annular protuberance being between 150% and 400% the mass of a part of the suspension hoop on which the at least one annular protuberance is positioned.

Abstract: Provided is a panel vibration type sound-generating display device. A display device includes: a display panel configured to display an image, a cover bottom configured to cover the display panel, a sound-generating actuator supported by the cover bottom, the sound-generating actuator configured to vibrate the display panel to generate sound, and a sealing member between an outer peripheral portion of the sound-generating actuator and an outer surface of the cover bottom.

Abstract: An electroacoustic transducer, which can be a speaker or a microphone, includes a frame, a housing, and a vibrating body having one or more vertically split cylindrical faces. The opposing sides of the vibrating body is connected to the housing or the frame. A conversion section converts an electrical signal into vibration of the vibrating body or vibration of the vibrating body to an electrical signal. The vibrating body can extend to the side surfaces of the housing or completely wrap around the housing.

Abstract: Embodiments of a speaker spider for a loudspeaker or transducer are provided. The speaker spider may include a textile material formed of a woven pattern with a plurality of concentric corrugations. The weaving pattern and/or dimensions of the speaker spider may substantially homogenize and/or reduce stress on the speaker spiders during operation of the speaker. The weaving pattern of the textile material of the speaker spider may include a pattern formed of a plurality of substantially concentric circular shapes, and/or a pattern including threads tangential to the central opening.

Abstract: The present invention provides a conductive-layer-integrated flexible printed circuit board that has excellent electrical insulation reliability and that prevents the electrically conductive layer from being detached during a reflow process. The conductive-layer-integrated flexible printed circuit board includes: (A) an electromagnetic-shielding conductive layer; (B) an insulator film; and (C) a wiring-pattern-equipped film, (A) the electromagnetic-shielding conductive layer, (B) the insulator film, and (C) the wiring-pattern-equipped film being laminated in this order, (B) the insulator film containing at least (a) a binder polymer and (b) a black coloring agent having a reflective range within the infrared range.

Abstract: An acoustic tile with excellent anti-sagging properties is provided. The tile comprises a soy-protein binder selected from the group consisting of soy flour, soy protein concentrate, soy protein isolate and any combination thereof. In further embodiments, the tile further comprises polyamide-epichlorohydrin. Other tiles include those made with a thermosetting binder selected from the group consisting of an acrylic binder, a polyester binder, an acrylo-polyester binder and any mixture thereof. Energy-efficient methods for making the tiles are also provided.

Abstract: A diaphragm for an audio speaker includes an outer shell and an inner shell. Each shell has a face portion and an edge portion that is formed to be substantially perpendicular to the face portion. The inner shell is inserted into the outer shell such that at least a part of the edge portion of each shell is in contact with at least a part of the edge portion of the other shell and a space is formed between the face portions of each shell. A cellular core fills the space formed between the face portions of each shell and is bonded to the face portion of each shell. The outer and inner shells may have identical sizes and shapes such that there is an interference fit between the contacting edge portions. A voice coil may be supported by the edge portions.

Abstract: A speaker diaphragm of the present invention is formed by mixing polylactic acid as a plant-derived resin, bamboo fibers and a natural binder. It is thereby possible to realize a speaker diaphragm capable of obtaining sufficient sound velocity, while having low environmental load and high sound quality.

Abstract: A process for the manufacture of a speaker cover comprises loading the speaker cover into a plasma chamber, introducing a fluoro monomer into the plasma chamber, pulsing plasma for processing, removing any excess monomer gas from the plasma chamber, and removing the speaker cover from the plasma chamber.

Abstract: A loudspeaker resin molding component includes resin and bamboo fibers refined to have a microfibril status and carbonized. By this configuration, such a loudspeaker resin molding component can achieve both of a high elastic modulus and a large internal loss.

Abstract: A diaphragm is formed of paper manufactured from a first fiber material and a second fiber material. The first fiber material is beaten to have a given freeness, and the second fiber material is made by carbonizing bamboo fiber that has been fibrillated into a microfibril state. This structure allows the second fiber material to increase a rigidity of the diaphragm and also increase an internal loss, so that sound quality of the speaker that employs this diaphragm can be improved.

Abstract: A speaker diaphragm includes a fabric layer in which impregnated thermosetting resin is thermally cured, and a paper layer integrated on a rear face of this fabric layer. Fluffs of the paper layer filling stitches of the fabric layer are entangled with threads of the fabric layer from a surface of the fabric layer, and are firmly fixed by thermosetting resin. This integrates the layers in the state that the paper layer is filled in the stitches of the fabric layer. Accordingly, internal loss and Young's modulus of the speaker diaphragm can be increased. As a result, the speaker sound quality can be improved.

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: Each of a speaker diaphragm, a dust cap, and a frame includes a resin and a plant opal that is extracted from a bamboo leaf, and is formed by injection molding or sheet molding. The configuration can enhance stiffness of each of the diaphragm, the dust cap, and the frame and implement high performance.

Abstract: A loudspeaker resin molding component includes resin and bamboo fibers refined to have a microfibril status and carbonized. By this configuration, such a loudspeaker resin molding component can achieve both of a high elastic modulus and a large internal loss.

Abstract: The invention relates to a composition of a speaker membrane, consisting at minimum of the following layering sequence: a first cover layer (3) made of a plastic, a first adhesive layer (2), and a first layer (4) manufactured from a non-woven material (fleece) made of fibers.

Abstract: A loudspeaker diaphragm contains polylactic acid, and bamboo charcoal mixed in the polylactic acid. The diaphragm does not affect environment and provides a loudspeaker with high sound quality.

Abstract: Provided is a speaker diaphragm or a speaker voice coil bobbin manufactured by a papermaking method and including metal hydroxide by at least an amount of 30 wt % or greater. With this, it is possible to improve rigidity and achieve favorable acoustic quality by an effect of mixing metal hydroxide. Moreover, it is possible to provide a paper-made diaphragm or a voice coil bobbin with flame retardancy without increasing weight or cost.

Abstract: A rigid three-dimensional component such as a speaker dome is formed of diamond, preferably fabricated to net shape by CVD diamond synthesis, and includes a coating on one or more major surfaces thereof. The coating is designed to enhance the performance and/or to alter the appearance of the component. In particular, the coating is designed to act as a damping medium and/or provide aesthetic qualities to the component.

Abstract: A speaker diaphragm containing resin and carbonized bamboo material with a large degree of flexibility in setting physical properties, moisture-proof reliability and strength secured, superior appearance, and productivity and dimensional stability increased, which allows making characteristics and sound highly accurately, and designing with great originality.

Abstract: Composite loudspeaker cones that include an interstitial layer of material having a core density below 600 kg/m3 and a Young's modulus greater than 0.2 GPa, such as balsa wood, interposed between a first carbon fiber layer and a second carbon fiber layer and method of making same.

Abstract: Each of a speaker diaphragm, a dust cap, and a frame includes a resin and a plant opal that is extracted from a bamboo leaf, and is formed by injection molding or sheet molding. The configuration can enhance stiffness of each of the diaphragm, the dust cap, and the frame and implement high performance.

Abstract: A diaphragm is formed of paper manufactured from a first fiber material and a second fiber material. The first fiber material is beaten to have a given freeness, and the second fiber material is made by carbonizing bamboo fiber that has been fibrillated into a microfibril state. This structure allows the second fiber material to increase a rigidity of the diaphragm and also increase an internal loss, so that sound quality of the speaker that employs this diaphragm can be improved.

Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.

Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.

Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.

Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.

Abstract: A speaker diaphragm which includes a woven cloth which contains a thermosetting resin of thermo-cured state, and a paper board bonded and integrated with the woven cloth at the back surface. The woven cloth has its weave texture exposed on the front surface. The diaphragm has a high strength because it is made with a woven cloth; furthermore, its hardness is high because the thermosetting resin impregnated in woven cloth is in thermo-cured state. Thus the diaphragm helps implementing a speaker which demonstrates superior vibration characteristics in the high frequency sound region.

Abstract: Natural fiber is beaten with a biaxial kneading machine. The beaten natural fiber is processed finely with a bead mill so as to allow the processed natural fiber to have a BET specific surface area not smaller than 1 m2/g. This method provides fine fiber in a short time to form a rigid paper component.

Abstract: A water-resistant composite paper, suitable for use as a loudspeaker component, is made from a composition including wood pulp, hydrophobic fibers, and stiffening fibers that retain stiffness when wet. In some examples, fibrillated acrylic fibers and glass fibers are used.

Abstract: A speaker diaphragm of the present invention is molded by paper-making molding, using not smaller than 5 wt % of fibers extracted from at least bamboo leaves. It is thereby possible to improve the rigidity of the speaker diaphragm, so as to realize a speaker diaphragm with low environmental load, reducible cost and high sound quality.

Abstract: A Vibration system part for a speaker device includes a woven fabric or a non-woven fabric made of basalt fiber produced by twist yarn or roving yarn being a continuous long-fiber. The vibration system part for the speaker device may be a diaphragm, a center cap, an edge or a damper, for example. In a preferred example, the woven fabric or the non-woven fabric is impregnated with thermosetting resin or thermoplastic resin. Additionally, a lamination member, such as paper, foam material, resin or a film, is preferably laminated (coated) on the woven fabric or the non-woven fabric. Thus, the vibration system parts for the speaker device, having excellent acoustic property and reliability, can be obtained at a low price.

Abstract: A speaker diaphragm includes a fabric layer in which impregnated thermosetting resin is thermally cured, and a paper layer integrated on a rear face of this fabric layer. Fluffs of the paper layer filling stitches of the fabric layer are entangled with threads of the fabric layer from a surface of the fabric layer, and are firmly fixed by thermosetting resin. This integrates the layers in the state that the paper layer is filled in the stitches of the fabric layer. Accordingly, internal loss and Young's modulus of the speaker diaphragm can be increased. As a result, the speaker sound quality can be improved.

Abstract: The invention relates to a composition of a speaker membrane, consisting at minimum of the following layering sequence: a first cover layer (3) made of a plastic, a first adhesive layer (2), and a first layer (4) manufactured from a non-woven material (fleece) made of fibers.

Abstract: A speaker diaphragm which includes a woven cloth which contains a thermosetting resin of thermo-cured state, and a paper board bonded and integrated with the woven cloth at the back surface. The woven cloth has its weave texture exposed on the front surface. The diaphragm has a high strength because it is made with a woven cloth; furthermore, its hardness is high because the thermosetting resin impregnated in woven cloth is in thermo-cured state. Thus the diaphragm helps implementing a speaker which demonstrates superior vibration characteristics in the high frequency sound region.

Abstract: A diaphragm for use in a speaker is manufactured using a plurality of thin wooden boards having flat rectangular shapes. The thin wooden boards are impregnated with a resin; then, a plurality of cutouts, which are elongated along wooden fiber directions or which are elongated in directions crossing wooden fiber directions, are formed in the thin wooden boards. Instead of the cutouts, it is possible to form a plurality of folded portions elongated in directions crossing wooden fiber directions. The thin wooden boards are integrally laminated together in such a way that the wooden fiber directions thereof mutually cross with a prescribed angle therebetween. The thin wooden boards integrally laminated together are subjected to thermal pressing so as to form a wooden vibrator serving as the diaphragm. Thus, it is possible to easily produce the diaphragm having a high strength and superior acoustic characteristics without causing defects.

Abstract: A loudspeaker diaphragm contains polylactic acid, and bamboo charcoal mixed in the polylactic acid. The diaphragm does not affect environment and provides a loudspeaker with high sound quality.