270results about "Metallic diaphragms" patented technology

A diaphragm for acoustic converter includes a base and a damping layer formed on one surface or both surfaces of the base. The damping layer includes a particle having a heat dissipating function, and has detachability with respect to the base.

A disposable-type hearing aid uses a relatively large single diaphragm or a large single diaphragm subdivided into a plurality of smaller active diaphragm areas obtained using a grate-like back support plate with ridges which contact and divide the diaphragm into the several smaller active diaphragm areas. The diaphragm and a backplate are enclosed in a metal housing and are disposed proximal and parallel to a shell-like hearing aid enclosure having sound inlets. The metal housing is closed at an end opposite the sound inlets by a printed circuit board (PCB) forming an acoustical seal for a back volume of the microphone. The PCB also carries substantially all the electronic components for the hearing aid thereon. The PCB has a ground plane in contact with the housing whereby the PCB also acts as an EMI shield. An electrical connection is formed in various ways between the back support plate and the PCB during assembly of the metal housing and components with the PCB. Mass production of disposable hearing aids with large diaphragms and relatively low noise levels is thus possible using this invention.

A diaphragm for a speaker includes two portions. The first portion is made of metallic material for producing a high frequency tone. The second portion is made of a non-metallic material for producing a low frequency tone. The first portion is joined at a first peripheral edge to a voice coil while a second peripheral edge is joined at a first peripheral edge of the second portion to form the diaphragm.

The present invention provides diamond tools, and a method for the formation thereof, using CVD techniques. In one aspect, a mold is provided which has an interface surface configured to inversely match a configuration intended for the working surface of a diamond layer in a tool. After the mold is provided, various CVD techniques may be used to deposit diamond layers upon the diamond interface surface of the mold. Following diamond deposition upon the diamond interface surface, the mold may be removed by various means, such as chemical etching, or the mold may be left intact for certain applications, such as SAW filters. Thus, the working surface of the diamond receives a shape which inversely corresponds to the configuration of the mold's diamond interface surface. The diamond layer may then be incorporated into a tool, if such incorporation has not yet taken place.

The invention discloses a moving coil type loudspeaker, which comprises a vibrating system and a magnetic circuit system positioned below the vibrating system, wherein the vibrating system comprises a vibrating film, a centering support chip and a sound coil which are combined together from top to bottom, the vibrating film comprises a vibrating film body part with a folded ring, and a vibrating film reinforcement part combined at the center position below the vibrating film body part; the vibrating film reinforcement part consists of a first conductive material layer, the centering support chip consists of a second conductive material layer, and the vibrating film reinforcement part and the centering support chip are adhered by a conductive binder and are conducted; the magnetic circuit system comprises a central washer, a central magnet and a magnetic conductive yoke which are combined together from top to bottom; the first conductive material layer and the second conductive material layer are used as movable polar plate, and the central washer, the central magnet and the magnetic conductive yoke are used as fixed polar plate, to form a capacitance structure for detecting the vibration displacement of the moving coil type loudspeaker. The vibrating displacement of the moving coil type loudspeaker can be detected by utilizing the capacitance structure provided by the invention.

The claim invention is directed at a MEMS microphone die fabricated using CMOS-based technologies. In particular, the claims are directed at various aspects of a MEMS microphone die having anisotropic springs, a backplate, a diaphragm, mechanical stops, and a support structure, all of which are fabricated as stacked metallic layers separated by vias using CMOS fabrication technologies.

A speaker device that comprises a cabinet and a speaker unit. The speaker unit is attached to an opening portion formed in a front surface of the cabinet. The speaker unit has a back surface frame, a front surface frame, a first magnetic circuit, a second magnetic circuit, an edge, a damper, a diaphragm, a voice coil bobbin, and a voice coil. A non-magnet member which is a portion of the diaphragm, the first magnetic circuit, and the second magnetic circuit play a role as a negative stiffness mechanism to suppress an influence of an acoustic stiffness, thereby achieving a small-size speaker device capable of reproducing low-frequency sound.

A method for forming diamond tools using CVD techniques. In one aspect, a mold is provided which has an interface surface configured to inversely match a configuration intended for the working surface of a diamond layer in a tool. An adynamic diamond mass or layer is then deposited upon the diamond interface surface of the mold, and a support layer is joined to the growth surface of the adynamic diamond layer. At least a portion of the mold is then removed to expose the working surface of the diamond which has received a shape which inversely corresponds to the configuration of the mold's diamond interface surface.