454results about "Diaphragm construction" patented technology

Disclosed herein is an acoustic diaphragm for converting electrical signals into mechanical signals to produce sounds. The acoustic diaphragm comprises carbon nanotubes or graphite nanofibers as major materials. Preferably, the carbon nanotubes or graphite nanofibers are included or dispersed in the acoustic diaphragm. Since the acoustic diaphragm has excellent physical properties in terms of elastic modulus, internal loss and strength, it can effectively achieve superior sound quality and high output in a particular frequency band as well as in a broad frequency band.

A loudspeaker cone body made of plastic includes a base carrier material and a filler material. The base carrier material is selected to optimize overall flow, weight and stiffness. The filler material may be a nanomaterial that provides for adjustment of process and acoustic related characteristics in the loudspeaker cone body that become relevant when the loudspeaker cone body is operated in a loudspeaker. Acoustic related characteristics that may be adjusted include a stiffness to weight ratio and an acoustic damping of the loudspeaker cone body. A predetermined weight percent of the filler material may be combined with the base carrier material to obtain repeatable desired acoustic related characteristics. The acoustic related characteristics may be adjusted by changing the predetermined weight percent of the filler material.

Disclosed herein is an acoustic diaphragm for converting electrical signals into mechanical signals to produce sounds. The acoustic diaphragm comprises carbon nanotubes or graphite nanofibers as reinforcing agents. Preferably, the carbon nanotubes or graphite nanofibers are included or dispersed in the acoustic diaphragm or coated on the surface of the acoustic diaphragm. Since the acoustic diaphragm has excellent physical properties in terms of elastic modulus, internal loss, strength and density, it can effectively achieve superior sound quality and a high output in a particular frequency band as well as in a broad frequency band.

The present invention relates to a subminiature bone conduction speaker by using a vibrating plate and a mobile phone having the subminiature bone conduction speaker. A subminiature bone conduction speaker using a vibrating plate according to the present invention comprises a body having a shape of a cylinder of which upper portion is opened; yoke which is disposed in a lower portion of the body and of which center has a protrusion; a ring type magnet which is formed on the edge of the yoke and apart from an end portion of the protrusion by a predetermined clearance; an upper plate which is formed on the magnet; a mastoid which is contacted to bone conduction of a user and by which vibration is transmitted to the user; an acoustic vibrating plate which is inserted at a lower side of the mastoid to cover the opening portion of the body and which is made of an elastic material; an auxiliary vibrating plate which is inserted under the acoustic vibrating plate which is inserted to the mastoid; a voice coil which is attached to the auxiliary vibrating plate and which is inserted between the end portion of the protrusion of the yoke and the ring type magnet; a front cap for fixing the acoustic vibrating plate on the body; and a electrical signal input unit for inputting an electric signal to the voice coil.

A capacitor microphone is constituted by a plate having a fixed electrode, a diaphragm including a center portion and at least one near-end portion that is fixed to the outer periphery, in which the center portion having a vibrating electrode, which is positioned relative to the fixed electrode and which vibrates in response to sound waves, is increased in rigidity in comparison with the near-end portion; and a spacer that is fixed to the plate and the near-end portion of the diaphragm and that has an air gap formed between the plate and the diaphragm. Alternatively, a diaphragm electrode is horizontally supported by extension arms extended from a circular plate thereof and is vertically held in a hanging state being apart from a fixed electrode with a controlled distance therebetween.

Microphone diaphragms are provided having an active area with a periphery defined by at least a portion of a logarithmic curve. In some embodiments, the periphery is defined by at least a portion of a golden spiral. The microphone diaphragms may be used in pressure microphones.

The invention discloses a sounding device. The sounding device comprises a vibrating diaphragm component, wherein the vibrating diaphragm component comprises a vibrating diaphragm and a plastic supporting element combined at the edge of the vibrating diaphragm; the vibrating diaphragm is of a silicon rubber structure, and is in fixed combination with a supporting element in an injection molding manner; and a combining portion which is in injection molding combination with the supporting element is arranged at the edge of the vibrating diaphragm. The manufacturing method of the sounding device comprises the following steps of: 1, forming an annular plastic supporting element in the injection molding manner through filling plastic material in a shaping mold of the supporting element; and 2, fixing the supporting element, and forming a silicon rubber vibrating diaphragm by filling the silicon rubber material in the shaping mold of the vibrating diaphragm, wherein the shaping mold of the vibrating diaphragm extends to the inner side wall of the supporting element, or on the position of the upper side and / or the lower side wall. The vibrating diaphragm with the structure has excellent consistency, and high product stability; the shaping technology of the vibrating diaphragm is simplified, and the manufacturing process of the product is simplified.

The present invention relates to a suspension member for a diaphragm and to an electro-acoustic transducer applying such suspension member. The suspension member comprises an inner portion being adapted to be attached to a piston, an outer portion being adapted to be coupled to a substantially stationary portion of an associated electro-acoustic transducer, and a flexible member connecting the inner and outer portions. The flexible member comprises at least one electrically conducting element adapted to transport electrical signals across the suspension member.

A loudspeaker diaphragm having a small overall height dimension, in which a dome portion has a sufficient rigidity and which is capable of realizing a stable loudspeaker operation, wherein the loudspeaker diaphragm can realize a desirable sound reproduction without noise, or the like, with a frequency response that is flat over a wide range. In the loudspeaker diaphragm of the present invention, the dome portion includes a concave dome portion formed at a center thereof, a convex dome portion along an outer periphery of the concave dome portion, a plurality of depressed ribs each extending in a radial direction across a boundary between the concave dome portion and the convex dome portion, a voice coil attachment portion along an outer periphery of the convex dome portion, and a plurality of protruding ribs extending in the radial direction across a boundary between the convex dome portion and the voice coil attachment portion, wherein each protruding rib is spaced apart in a circumferential direction from two adjacent depressed ribs.

Provided is an acoustic generator which has a high sound pressure at ultrahigh frequencies and which can suppress occurrence of large peak dips. An acoustic generator includes a film, a frame member disposed on an outer peripheral edge of the film, a piezoelectric element disposed on the film and inside the frame member, and a resin layer filled inside the frame member so as to cover the piezoelectric element.

A MEMS device includes a vent hole structure and a MEMS structure disposed on a same side of a substrate. The vent hole structure adjoins the MEMS structure with an etch stop structure therebetween. The MEMS structure includes a chamber, the vent hole structure includes a metal layer having at least a hole thereon as a vent hole to connect the chamber of the MEMS structure through the etch stop structure. Accordingly, the MEMS device has a lateral vent hole. Furthermore, as the vent hole structure and the MEMS structure are disposed on the same side of the substrate, the manufacturing process is convenient and timesaving.

A component that is rigid and three-dimensional and has a relatively low mass. The component has a foil body formed of a metal or metal alloy matrix that is embedded with ultra-hard particles or grit, such as diamond and / or cBN. It can be used in applications where a combination of high rigidity and low mass is required, such as in audio applications, for example.

The invention discloses a MEMS microphone, which comprises a substrate, a first vibrating diaphragm and a second vibrating diaphragm. A sealing cavity is formed between the first vibrating diaphragm and the second vibrating diaphragm. A back electrode unit is arranged in the sealing cavity and forms a capacitor structure together with the first vibrating diaphragm and the second vibrating diaphragm. A plurality of through holes penetrating through the two sides of the back electrode unit are formed in the back electrode unit. A gas with the viscosity coefficient thereof smaller than that of air is filled in the sealing cavity. According to the MEMS microphone, the gas with the viscous coefficient thereof smaller than that of air is filled in the sealing cavity, so that the sound resistanceof the two vibrating diaphragms when the vibrating diaphragms are moving relative to the back electrode can be greatly reduced. The noise of the microphone is reduced. Meanwhile, the gas with the lowviscosity coefficient is used for filling, so that the pressure in the sealing cavity can be consistent with the pressure of the external environment. The problem of diaphragm deflection caused by differential pressure is avoided, and the performance of the microphone is guaranteed.

An edge (29) for supporting a diaphragm assembly (100) with respect to a frame (26) is bonded to the frame (26) along the outer periphery thereof and joined to a diaphragm (27) in a position more peripherally inward than a voice coil (28) along the inner periphery thereof. The edge (29) partly overlaps diaphragm (27). This structure allows downsizing of the speaker, without reducing the sizes of a permanent magnet (21) and the edge (29).

A forward focused bipolar loudspeaker system includes a front-facing driver array and a rear facing driver array with substantially identical front-facing and rear-facing midrange or mid-bass drivers voiced and driven so that the measured SPL curves of each of the arrays, when measured individually, are tonally balanced. The front array and rear array have substantially identical on-axis and off axis frequency response and the rear array's output power (SPL) is reduced by, preferably, about 6 dB with respect to the output power produced by the front-facing array, while retaining a flat tonal balance for both the front and rear speakers, to produce a sound power ratio of about 2:1 as measured by comparing the front and back SPL levels of the speakers. This bipolar speaker system and method for voicing was discovered to provide greater clarity and improved localization while retaining the spacious envelopment of the bipolar sound field.

A diaphragm for a speaker (1) is formed of a composite (15) containing a resin (16) and a bamboo fiber (17) included therein. This constitution can provide a diaphragm (1) which can simultaneously realize advantages of the bamboo fiber (17) such as a high sound quality and a high level of freedom in setting of property values of the diaphragm (1) and advantages of the resin diaphragm (1) such as improved moisture resistance reliability or strength, excellent appearance, and improved productivity and dimensional stability.

An earphone device having a concentrating tube includes an annular magnet, a first yoke, a second yoke, a concentrating tube, a speaker assembly, and a passive diaphragm. The first and second yokes are respectively connected to first and second magnetic pole faces of the annular magnet. The concentrating tube is received in a central through hole of the annular magnet. The concentrating tube includes first and second open ends. The speaker assembly includes a voice coil and an active diaphragm. The passive and active diaphragms are at two opposite ends of the concentrating tube. The active and passive diaphragms are respectively close to the first and second open ends. A gas flow generated by the active diaphragm is gathered by the concentrating tube and pushes the passive diaphragm. A gas flow generated by the passive diaphragm returns through the concentrating tube to push the active diaphragm and transmits acoustic waves.

A resin composite film comprising a cellulose microfiber sheet and a resin, the resin composite film satisfying the following: (1) in a modulus mapping obtained by an examination of a cross-section with an AFM along the thickness direction, the fibers constituting the cellulose microfiber sheet have an average fiber diameter and a maximum fiber diameter, both calculated through image analysis, of0.01-2.0 [mu]m and 15 [mu]m or smaller, respectively; and (2) at least one surface of the resin composite film has an overcoat resin layer having an average thickness, determined from the modulus mapping, of 0.3-100 [mu]m.

The invention discloses a device for improving outgoing loudspeaker responses, particularly relating to a device for improving medium-high frequency responses of outgoing loudspeakers of terminals, such as mobile telephones and the like. The device for improving outgoing loudspeaker responses comprises a minitype loudspeaker, a back cavity and a front cavity, wherein the minitype loudspeaker is used for converting an input electric signal into a corresponding acoustic signal; the back cavity is fixed to the back side of the loudspeaker diaphragm; the front cavity is fixed to the front side ofthe loudspeaker diaphragm; the front cavity is divided by a first partition board into a first subcavity and a second subcavity; the first partition board and the second partition board are provided with holes; and the device is coupled with the outside region through the hole in the second partition board. The resonance of the two subcavities of the front cavity can be controlled by changing thegeometric dimensions of the front cavity, thereby effectively enhancing the responses of the frequency range corresponding to the medium-high frequency.

The invention provides a capacitance microphone chip which comprises a substrate with a through hole, a diaphragm support layer arranged at the upper part of the substrate and corresponding to the substrate, a diaphragm covered at the upper part of the diaphragm support layer, a back electrode support layer arranged at the upper part of the diaphragm and a back electrode arranged at the upper part of the back electrode support layer, wherein a circular vein membrane which is concentric with the diaphragm is arranged in the edge region of the diaphragm. In the capacitance microphone chip provided by the invention, the vein membrane and reinforcing rib structure of the invention can be used for effectively enhancing the vibration amplitude of the diaphragm, thereby enhancing the change of the capacitance in the chip to further improve the sensitivity of a capacitance microphone on the premise that the volume of the chip is not changed; the part, provided with a diaphragm reinforcing rib, in the vein membrane on the diaphragm is basically maintained to perform translational motion and the capacitance change rate of the microphone is improved; the problem that the local deformation of the diaphragm is overlarge is avoided; and the sensitivity and reliability of the capacitance microphone chip are improved.

An improved electrostatic membrane pump / transducer having an array of electrostatic membrane pump transducers that utilize a venturi channel. The electrically conductive membrane of the electrostatic membrane pump transducers can be a polymer membrane coated with a conductive coating. The electrostatic membrane pump transducers can be optionally controlled such that one set is out of phase with another set.

The invention relates to a dual-sound basin thin speaker which comprises a basin frame with a basin-shaped cavity, a magnetic circuit structure arranged in the basin frame, and a main sound basin arranged at the periphery of the magnetic circuit structure, wherein the magnetic circuit structure is closely combined on the inner surface at the bottom of the basin frame; the edge of the main sound basin is supported on the edge of the basin frame, and a central hole wall of the main sound basin is closely combined with an outer wall of a sound coil of the magnetic circuit structure; a wiring board is arranged on the basin frame, and a lead wire of the sound ring of the magnetic circuit structure is connected with the wiring board; a locating support and an auxiliary sound basin are further arranged at the periphery of the magnetic circuit structure; and the bottom of the locating support is closely combined on the inner surface at the bottom of the basin frame, the auxiliary sound basin is positioned below the main sound basin, the edge of the auxiliary sound basin is supported on the top of the locating support, and a central hole wall of the auxiliary sound basin is closely combined with the outer wall of the sound coil of the magnetic circuit structure. The dual-sound basin thin speaker has artful, compact and rational structure, and can ensure compliance of a vibrating system, improve low-frequency response characteristics, rapidly discharge thermal energy and guarantee acoustic performance and reliability of the speaker while optimizing thickness.

An acoustic paper diaphragm excellent in moisture resistance and acoustic characteristics and not impairing the biodegradability is provided. An acoustic paper diaphragm is formed of paper in which polylactide resin emulsion that is a biodegradable polymeric material is internally added as a sizing agent.

The invention relates to a planar loudspeaker composite vibrating diaphragm and an earphone loudspeaker with the same. A first sub-coil formed by wiring first conductors regularly is arranged on a first surface of the vibrating diaphragm, a second sub-coil formed by wiring second conductors regularly is arranged on a second surface of the vibrating diaphragm, the first sub-coil and the second sub-coil are connected serially, at least parts of projections of the first sub-coil and the second sub-coil on the plane of the vibrating diaphragm are overlapped, and directions of current of the overlapped parts of the first sub-coil and the second sub-coil are the same. The headset loudspeaker comprises the vibrating diaphragm and permanent magnets oppositely arranged at the positions of the coils on the vibrating diaphragm. The planar loudspeaker composite vibrating diaphragm has the advantages that the planar loudspeaker composite vibrating diaphragm of the composite structure is formed by serially connecting a plurality of coils, one coil is made of gold or platinum with good malleability, the other coil is made of other conventional metal materials, quality of the whole coils is controlled by controlling lengths and areas of the two coils, sound characteristics of the loudspeaker are controlled, and low-frequency response, high-frequency response and transient are more balanced.

The invention provides a method for manufacturing diaphragm for loudspeaker and diaphragm for speaker. The object of the invention is to manufacture diaphragm for loudspeaker with plural structure by paper-making without coating binder, to prevent stripping among vibrating board layers, and to manufacture the expected vibrating board for loudspeaker by stacking the materials with different characteristics with paper-making. The method comprises: injecting the suspension containing forming material of the vibrating board layer by a means of liquid layer spaced without the forming material of the vibrating board into the common paper-making pool in order; operating the paper-making to the suspension in order to stack plural vibrating board layer. Compared to the present method of binding by binder, the invention can manufacture plural layer diaphragm for loudspeaker by paper-making without coating binder after presetting paper-making to respective vibrating board layer.

A silicon nitride film (103) and a silicon nitride film (106) are formed to cover a charged silicon oxide film (105) serving as an electret.

In a diaphragm for a loud-speaker of the present invention, an increase in tensile strength is averagely attained as a whole, and the over all diaphragm is uniformly colored without showing any lattice pattern. The diaphragm includes a woven fabric comprising yarns made from a blend of a plurality of fibers wherein at least one of the plurality of fibers is PBO (poly(p-phenylene benzobisoxazole)) fiber.