A loudspeaker diaphragm includes a woven fabric which is a base member, a sealing layer, and a coating layer. The woven fabric includes a first face and a second face on the reverse side of the woven fabric from the first face. The woven fabric is made into the shape of a diaphragm. The sealing layer is disposed on the first face of the woven fabric, and seals the mesh openings surrounded by warp threads and weft threads of the woven fabric. The coating layer is formed of a first composite material which is a mixture of a plurality of first short nanofibers and a first resin. The coating layer permeates the woven fabric from the second face of the woven fabric to the sealing layer.

A moving-coil loudspeaker is provided, comprising a vibration system and a magnetic circuit system located below the vibration system; the vibration system including a diaphragm, a spider, and a voice coil, the diaphragm comprising a diaphragm body part and a diaphragm reinforcing part; and the magnetic circuit system including a center washer, a center magnet, and a magnetic yoke; wherein the diaphragm reinforcing part comprises a first conductive material layer, the spider comprises a second conductive material layer, and the diaphragm reinforcing part and the spider are bonded by a conductive adhesive which establishes electrically connection between the first and second conductive material layers; and wherein the first and second conductive material layers functioning as a movable plate, and the center washer, the center magnet, and the magnetic yoke functioning as a fixed plate constitute a capacitor structure for detecting a vibration displacement of the moving-coil loudspeaker.

The invention relates to a loudspeaker (10) comprising: a frame (12), a device (20) suitable for generating a magnetic field in a magnetic circuit (16) exhibiting an air gap (18), turns (24) of conductive materials suitable for moving in this air gap (18), a diaphragm (26) that is rigidly connected to the turns (24) of conductive materials and that is capable of moving in a direction of movement (Z) with respect to the frame (12), the diaphragm (26) having an inner face (26A) and an outer face (26B), the inner face (26A) of the diaphragm (26) being positioned facing the frame (12), and a grid (30) that is intended to stiffen the diaphragm (26), the shape of the grid (50) allowing the grid (30) to be glued to the outer face (26B) of the diaphragm (26).

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).

An acoustic transducer includes a first flexible structure having a top surface and a bottom surface. A transducer is attached to the top surface of the first flexible structure, wherein the transducer causes deformation of the first flexible structure when an input electrical signal is applied to the transducer. A second flexible structure has a convex top surface and a concave bottom surface. The convex top surface of the second flexible structure is in contact with the bottom surface of the first flexible structure. Deformation of the first flexible structure causes deformation of the second flexible structure.

A speaker diaphragm structure is installed inside a sound generator device which comprises a frame, a speaker diaphragm structure installed within the frame and a suspension edge whose inner perimeter is connected to the speaker diaphragm structure and whose outer perimeter is connected to the frame; herein the speaker diaphragm structure includes a diaphragm body and a composite material layer, in which the composite material layer is used for bonding onto the surface of the diaphragm body or attaching within the diaphragm body; moreover, the composite material layer is composed of one or more types of tetrapyrrole compounds as well as one or more types of metal ions; additionally, the composite material layer has a thickness smaller than the thickness of the diaphragm body, and is mainly applied to provide the performance effect of sound quality modifications.

A vibration plate manufacturing device includes: a defibration unit which defibrates a material including fibers and generates a defibrated material formed of fibers having a fibril area of 0.5% to 2.0%; a mixing unit which mixes a binding material for binding the fibers to each other, into the defibrated material; a second web formation unit which accumulates a mixture mixed by the mixing unit; and a molding unit and a heating unit which perform a molding process including pressing and heating on the second web to obtain a molded product.

A diaphragm structure is used for an audio signal output device. The diaphragm structure includes a film substrate, a polymer fiber structure and a thin film metallic glass. The film substrate includes a first surface and a second surface opposite to the first surface. The polymer fiber structure is combined with the first surface of the film substrate. The thin film metallic glass is formed on at least a part of the second surface of the film substrate.

The invention relates to a composite for an acoustic component having at least one carrier layer and an electrospun membrane which is arranged on the at least one carrier layer, wherein the electrospun membrane is formed of superimposed fibers while a pore structure is being designed. The pore structure of the composite is designed such that the composite has a water column of at least 1 m and an air permeability of 5 L/m.sup.2*s. Furthermore, the invention relates to a method for producing a composite for an acoustic component, in which a carrier layer is provided and on the carrier layer a membrane is designed according to the electrospinning method, wherein the membrane is produced of superimposed fibers with a defined pore structure.

The present disclosure provides a speaker, comprising a basin frame with a receiving space, a vibration system disposed at the basin frame, and a magnetic circuit system configured for driving the vibration system to vibrate and thus generate sound, wherein, the vibration system comprises a sound radiation plate, a flexible circuit board for elastically supporting the sound radiation plate and a voice coil disposed at a lower side of the flexible circuit board, the flexible circuit board comprises coating layers laminated apart and a copper layer sandwiched between two adjacent coating layers, the coating layers are poly ether ether ketone layers and/or a thermoplastic polyurethane elastomer layers. The speaker provided by the present disclosure has a vibration system with a smaller mass, a higher sensitivity and a reduced cost.