Abstract:
The quality of sound genrated is improved and the appearance is also improved. A loudspeaker diaphragm (10) has at its slant portion a projection shown representatively by an edge (4) and a recess shown representatively by an edge (5). The projection is formed radially from the center and curved toward the edge in the circumferential direction. Therefore when the loudspeaker diaphragm (10) vibrates with a large amplitude and the center moves toward the bottom, a rotational force is exerted on the air tending to gather at the center and thereby the press against the center is mitigated. The loudspeaker diaphragm (10) has a three-dimensional structure similar to a screw propeller and is reinforced as a whole to suppress split vibration. The loudspeaker diaphragm (10) is produced by injection molding largely of polypropylene. A variety of colors can be easily given to it when produced. The color and its peculiar structure like a screw propeller impart strong impression.
Abstract:
A loudspeaker apparatus utilizing a ribbon diaphragm (12) which is capable of transforming an electrical signal into an audio acoustical signal. The diaphragm includes a first side (86) and a second opposite side (112). First and second magnets (36, 38) are also employed in the present invention and are mounted to the edges of the diaphragm (12) such that the diaphragm (12) lies in the magnetic field generated by the pair of magnets (36, 38). A first plurality of spaced magnetic plates (84) are stacked and extend continuously from the first magnet (36) to the second magnet (38) at the first side (86) of the diaphragm. The first plurality of plates form a throat-shaped cavity (90) of a pre-determined size. A second plurality of spaced magentic focusing plates (114) are stacked on the second side (112) of the diaphragm in the same manner. A plurality of sound damping shims (102), each interposes each of the first plurality of magnetic focusing plates on the sides of the throat-shaped cavity (90). An acoustic coupler or horn (128), each interposes may be easily attached to throat-shaped cavity (90) to enhance the lower acoustical response range.
Abstract:
Embodiments of an electromechanical transducer are presented. The electromechanical transducer includes a plurality of magnets and a substrate having a patterned conductive coil of at least one turn. The plurality of magnets are arranged such that a continuous magnetic flux path passes through each of the plurality of magnets. The substrate is located within an airgap between a given magnet of the plurality of magnets and an adjacent magnet of the plurality of magnets. The continuous magnetic flux path passes through at least a portion of the patterned conductive coil due to the location of the substrate within the airgap.
Abstract:
A silicon microphone (10) with a high-aspect-ratio corrugated diaphragm (200). The microphone (10) comprises a compliant diaphragm (200) on which at least one ring-shaped corrugation (210) is formed in the vicinity of the edge of the diaphragm (200) which is fixed to the substrate (100), wherein the depth of the corrugation (210) to the thickness of the diaphragm (200) is larger than 5:1, preferably 20:1, and the walls of the corrugation (210) are inclined to the surface of the diaphragm (200) at an angle in the range of 80º to 100º. The microphone (10) with a high-aspect-ratio corrugated diaphragm (200) can achieve a consistent and optimal sensitivity and reduce impact applied thereto in a drop test so that the performances, the reproducibility, the reliability and the yield can be improved.
Abstract:
An earphone comprises a membrane (10) mounted on a membrane carrier (12) and arranged between a top space (14) and a bottom space (16); a membrane actuator (18) implemented to deflect the membrane (10) in dependence on a control signal; a housing (20) where the membrane carrier (12), the membrane (10) and the membrane actuator (18) are arranged, wherein the housing comprises a sound exit (22), wherein the membrane carrier (12) comprises openings (26a, 26b, 26c), and wherein the membrane (10) comprises holes (28a, 28b, 28c), and wherein the openings (26a, 26b, 26c) and the holes (28a, 28b, 28c) connect the top space (14) and the bottom space (16) to each another, such that gas can move through the openings and holes between the top space and the bottom space.