Abstract: A waterproof microphone includes a transducer unit defining a sound receiving opening, a first waterproof layer fully covering the sound receiving opening, and a second waterproof layer spaced from the first waterproof layer for forming a closed decompression chamber.

Abstract: A micro-speaker includes a frame, a case supported by the frame, a sound generator located between the frame and the case. The case has a sound hole and a peripheral plate surrounding the sound hole. The peripheral plate includes an outer surface, an inner surface and an inclining surface extending from the inner surface toward the outer surface.

Abstract: A voice coil is disclosed. The voice coil includes a housing and a wire wrapped around the housing. The housing defines a connecting member and a combining member connected to the connecting member. The wire wraps around the combing member. The connecting member defines an outer surface, an inner surface opposed to the outer surface, and a top surface connecting the outer and inner surfaces. The housing further includes a through hole extending from the outer surface to the inner surface.

Abstract: A MEMS microphone includes a cover, a housing engaging with the cover for forming a cavity, at least one transducer accommodated in the cavity, and a conductive case covering the cover and the sidewall of the housing. The housing includes a cover and a sidewall extending from the base. The conductive case defines a first part covering the cover, a second part extending from the first part for covering the sidewall and a third part perpendicularly extending from the second part for covering a periphery part of the base, the third part forming an opening.

Abstract: A MEMS microphone includes a cover, a housing engaging with the cover for forming a cavity. The housing includes a base and a sidewall extending perpendicularly from the base. A conductive case is provided to cover the cover and the sidewall of the housing. The base defines a periphery portion outside of the cavity for forming a step, and the conductive case locates a bottom end thereof on the step.

Abstract: A magnetic circuit system includes a T-shaped yoke, a magnet, and a top plate. The top plate has a centre hole, an internal end around the centre hole thereof, and two projecting elements provided separately on upper surface and lower surface of the internal end, which improves non-linear distortion of a transducer using the magnetic circuit system.

Abstract: An electro-acoustic transducer is disclosed. The electro-acoustic transducer includes a case, a magnetic circuit and a vibrating device. The magnetic circuit includes a magnetic bowl coupled to the case, a magnet positioned in the magnetic bowl, a pole plate covering the magnet. A magnetic gap is formed by the magnet and the magnetic bowl. The vibrating device includes a diaphragm vibrating along a vibrating direction, and a voice coil connected to the diaphragm. The pole plate has a first top surface, a first bottom surface, and a first through hole extending from the first top surface to the first bottom surface. A projection of the first through hole along the vibrating direction overlaps at least a part of the magnetic gap.

Abstract: A condenser microphone is disclosed. The condenser microphone includes a substrate having a cavity, a backplate connected to the substrate, a diaphragm facing to the backplate, and an anchor supporting the diaphragm. A first gap is formed between the diaphragm and the backplate. A groove is arranged on the anchor and the diaphragm partially covers the groove. The diaphragm and the groove forms a second gap communicating with the first gap.

Abstract: A silicon based capacitive microphone includes a first printed circuit board, a second printed circuit board far away from the first printed circuit board, a transducer electrically mounted on the first printed circuit board, a controlling chip electrically mounted on the second printed circuit board, a connecting member located between the first and second printed circuit boards.

Abstract: A linear vibrator is disclosed. The linear vibrator includes a housing having a base and a cover, a number of elastic members connected to the housing, a vibrating unit suspended in the housing by the elastic members, and a coil positioned in the housing. The base has a bottom wall and a plurality of sidewalls extending vertically from the bottom wall. The vibrating unit has a magnet assembly and vibrates along a direction parallel to the bottom wall.

Abstract: A silicon condenser microphone includes a silicon substrate defining an opening, a diaphragm supported above the substrate, a backplate opposite to the diaphragm for forming a capacitor together with the diaphragm. The diaphragm includes a central vibrating portion and a plurality of arms extending from an edge of the vibrating portion. Each of the arms includes a first end connecting to the edge of the vibrating portion and a linking portion extending along a path having the same outline as that of the vibrating portion.

Abstract: A condenser microphone is disclosed. The condenser microphone includes a substrate having a cavity, a supporting member connected to the substrate, and a diaphragm isolated to the supporting member. The supporting member has a periphery portion and a plurality of stationary electrodes extending from the periphery portion to a center of the supporting member. The diaphragm has a vibrating member and a sustaining member connected to the vibrating member and the vibrating member defines a plurality of movable electrodes protruding from a periphery of the vibrating member. Each of the movable electrodes is located between two adjacent stationary electrodes and each of the stationary electrodes is located between two adjacent two movable electrodes.

Abstract: A silicon condenser microphone package includes a printed circuit board, a cover mounted on the printed circuit board, and a transducer unit and a controlling circuit both attached to the printed circuit board. An inner board is located in the cover. The sensitivity and frequency response of the silicon condenser microphone package is desirable.

Abstract: A vibrating motor includes a base having a bearing mounting section, a magnet mounted on the base, a shaft assembled with the bearing mounting section, a pair of brushes located on the base and a rotor rotably supported by the shaft. Each of the brushes has a first contacting portion and a second contacting portion. The rotor includes a commutator facing the brushes. The commutator defines a plurality of segments. A gap is defined between two adjacent segments and extends along radial direction of the commutator. A connecting line connecting the first and second contacting portions is not through the shaft.

Abstract: The present invention relates to a multifunctional device, which is particularly applicable to a twin magnet loop (called TML) transducer with both vibrating and sound functions. The present invention integrates an inner and an outer magnet loop of TML into one device, which can be used as a vibrator and a speaker. A disc-shaped pole core, a flange bowl-shaped magnetic transfer, an annular pole piece, a cylindrical magnet and an annular magnet constitute the inner and outer magnetic loops; wherein the disc-shaped pole core is placed on the cylindrical magnet and centered with the flange bowl-shaped magnetic transfer; the annular magnet and the annular pole piece are overlaid together under the ring of the flange bowl-shaped magnetic transfer; the entire of the TML assembly is connected with a housing base via a resilient plate.

Abstract: A novel electromagnetic acoustic device with twin magnetic loops is disclosed. The electro-acoustic device of the present invention comprises a magnetic transfer, a magnetic column (2), an annular magnet (4), an annular pole piece (5) and a pole piece (3). The magnetic transfer comprises a first, “cup-shaped”, round housing (11, 12) and its flange (13), which is the second annular. The first round housing (11, 12), the magnetic column (2), the pole piece (3) form the first magnetic loop. On the other side of the round housing, the housing flange, the annular magnet (4) and the annular pole piece (5) form the second magnetic loop.

Abstract: An electromagnetic audio transducer for SMD applications. The transducer comprises a lead frame with external terminals, which are formed into a predetermined shape. The transducer has a case with inside and outside surfaces, where the case is integrated with the lead frame to expose the external terminals at its outside surface. The transducer has solder bases formed by exposing the lead frame at the inside surface of the case. The drive section of the transducer has a coil arranged inside the case, with the coil having coil terminals, and the coil terminals are led to the solder bases for electrical connection at the inside surface of the case.