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| Number | Title | Issue Date |
| 7946378 | Membrane for an electroacoustic transducer A membrane for an electroacoustic transducer is disclosed having a first area, a second area, which is arranged for translatory movement in relation to said first area, and a third area, which connects said first area and said second area, wherein local, planar spri... | 05/24/2011 |
| 7866439 | Membrane for an electroacoustic transducer A membrane (2′) for an electroacoustic transducer (1) is disclosed having a first area (A1), a second area (A2), which is arranged for translatory movement in relation to said first area (A1), and a third area (A3), which ... | 01/11/2011 |
| 7644801 | Membrane with a high resistance against buckling and/or crinkling A membrane (2) for an electroacoustic transducer (1) is disclosed, wherein a thickness (d) of said membrane (2) and an average Young's modulus (Eavg) of said membrane (2) are chosen in such a way that the critical load (Fbc), which causes... | 01/12/2010 |
| 7319772 | Speaker device for improving mid/high-range frequencies A speaker device for improving mid/high-range frequencies includes a magnetic base, a frame annularly mounted to the magnetic base, a cone mounted to an inner side of the frame, a voice coil mounted to the cone and suspended in a gap of the magnetic base, and a dead... | 01/15/2008 |
| 7306073 | Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves A membrane (20) has a membrane axis (5) and a middle area (50), a central cup-shaped depression (52) being provided around said membrane axis (5), which depression (52) preferably has a connecting channel (53), wherei... | 12/11/2007 |
| 7272237 | Audio speaker having a removable voice coil An audio speaker having a removable voice coil, which may be a part of a voice coil assembly. The voice coil may be user-removable to facilitate replacement of a damaged voice coil or reconfiguration of a speaker system. Properly positioning the voice coil assembly ... | 09/18/2007 |
| 7233680 | Speaker device To realizes a speaker device with a simple construction capable of keeping stable statement, regardless of vehicle types. A speaker device for applying electromagnetic force to a voice coil based on a supplied audio signal and generating a sound wave based on the au... | 06/19/2007 |
| 7225895 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 06/05/2007 |
| 7185735 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 03/06/2007 |
| 7174990 | Tangential stress reduction system in a loudspeaker suspension The invention is a suspension element having an outer edge and an inner edge. The suspension element, such as a spider or surround, varies in shape along at least a portion of the suspension element to help relieve both the radial and tangential stress placed on the... | 02/13/2007 |
| 7110565 | Electroacoustic transducer with a diaphragm, and method for fixing a diaphragm in such transducer An electroacoustic transducer employing a polymer connection for maximizing volume displacement. The transducer includes a diaphragm in a case and means for converting. The diaphragm includes a central portion. The means for converting converts between an electric s... | 09/19/2006 |
| 7045768 | Displacement/quantity of light converter A displacement/quantity of light converter in which sensitivity to a micro displacement due to sound of a diaphragm, or the like, can be enhanced easily. In the displacement/quantity of light converter where a light emitting part (2) and a light receiving par... | 05/16/2006 |
| 6889796 | Loudspeaker suspension An annular surround for a loudspeaker cone wherein a radial cross-section of the surround varies around the circumferential extent of the surround, so as to accommodate peripheral expansion or contraction of the surround by bending. Thus a trough shaped cross-sectio... | 05/10/2005 |
| 6863153 | Loudspeaker diaphragm A speaker diaphragm 10 is provided having an improved quality of radiation sounds and a good outer appearance. The speaker diaphragm has in its slanted area projections typically represented by a peak line 4 and recesses typically represented by a bott... | 03/08/2005 |
| 6863152 | Low profile audio speaker A symmetrically loaded, shallow suspension speaker with stiff diaphragm having a minimum dimension that is greater than the diameter of the magnet that drives the diaphragm thus allowing the suspension of the diaphragm to extend nearly to the bottom of the speaker b... | 03/08/2005 |
| 6851513 | Tangential stress reduction system in a loudspeaker suspension The invention is a suspension element having an outer edge and an inner edge. The suspension element, such as a spider or surround, varies in shape along at least a portion of the suspension element to help relieve both the radial and tangential stress placed on the... | 02/08/2005 |
| 6814181 | Electrically conductive damper device for speaker There is provided an electrically conductive damper device for a speaker in which local bending is reduced and break-downs of material of the damper and metallic wires incorporated in the damper are prevented, by additionally providing one or more sheets of damper f... | 11/09/2004 |
| 6810126 | Planar magnetic transducer A panel transducer includes a diaphragm with areas of multiple electrical conductors, two rows of magnetic bars, two metal plates and a clamping frame. The diaphragm is clamped in the clamping frame and is positioned between the two rows of magnetic bars. Each row o... | 10/26/2004 |
| 6745867 | Loudspeaker drive unit A mid-frequency loudspeaker drive unit includes a substantially conical diaphragm having a forward periphery and a surround connected to and extending from the forward periphery of the diaphragm to form a substantially smooth transition from the diaphragm to the sur... | 06/08/2004 |
| 6732832 | Speaker damper A speaker damper comprises a damper casing and a metallic whisker, wherein the damper casing is substantially a woven pad formed as a circular wafer with corrugated sections, while the metallic whisker is substantially a conductive wire intermittently penetrated and... | 05/11/2004 |
| 6723913 | Fan cooling of active speakers The disclosed device is directed towards an active audio speaker system having at least one audio speaker and an amplifier electrically coupled thereto. The active audio speaker system includes a cabinet having an enclosure defining an interior of the cabinet and an... | 04/20/2004 |
| 6675931 | Low profile audio speaker A symmetrically loaded, shallow suspension speaker with stiff diaphragm having a minimum dimension that is greater than the diameter of the magnet that drives the diaphragm thus allowing the suspension of the diaphragm to extend nearly to the bottom of th... | 01/13/2004 |
| 6672423 | Speaker and method of assembling the speaker In a speaker including a voice coil which is wound on a voice coil bobbin and is inserted into a magnetic circuit gap of a magnetic circuit, and a cone which is coupled to the voice coil bobbin for vibration, the cone (16) is constructed of two divided co... | 01/06/2004 |
| 6626263 | Passive speaker system A passive radiator and method is disclosed which improves frequency response linearity and greatly reduces the possibility that wobble of a passive radiator which will occur without the displacement limitations of a spider containing speaker structure. Tw... | 09/30/2003 |
| 6591938 | Speaker diaphragm The speaker diaphragm of the present invention includes a nonwoven fabric impregnated with at least a thermosetting resin composition, molded, and cured. The nonwoven fabric is formed of a fiber material containing protein fibers. The thermosetting resin ... | 07/15/2003 |
| 6578661 | Speaker apparatus A speaker apparatus which can remove undesirable vibrations and can produce sounds of excellent quality of acoustic signals having high audio frequencies is presented by increasing a strength of a flat joint portion and by properly setting a mass ratio be... | 06/17/2003 |
| 6513623 | Speaker A frame (14) supporting a diaphragm (12) by its outer periphery is constructed by a connecting ring (30) and a base (28) which comprises a bottomed cylinder portion (28A) and a mounting portion (28B) which extends radially outward from the bottomed cylind... | 02/04/2003 |
| 6460651 | Passive speaker system A passive radiator and method is disclosed which improves frequency response linearity and greatly reduces the possibility that wobble of a passive radiator which will occur without the displacement limitations of a spider containing speaker structure. Tw... | 10/08/2002 |
| 6059069 | Loudspeaker waveguide design A loudspeaker horn has straight wall section and a curved wall section. The straight wall section has diverging walls defining a coverage angle and the curved wall portion is connected to the straight wall portion at a point tangent thereto, and has a pro... | 05/09/2000 |
| 6044925 | Passive speaker A passive radiator and method is disclosed which improves frequency response linearity and greatly reduces the possibility that wobble of a passive radiator which will occur without the displacement limitations of a spider containing speaker structure. Tw... | 04/04/2000 |
| 5721786 | Loudspeakers An improved loudspeaker comprises an oscillator fitted to an enclosure and able to oscillate to create sound waves. The oscillator, which includes a diaphragm, may be driven in response to an electromagnetic force or passively in response to pressures in ... | 02/24/1998 |
| 5701359 | Flat-panel speaker A composite loudspeaker diaphragm is disclosed having first and second substantially flat carbon fiber skins, and a honeycomb core sandwiched between the first and second carbon skins. In a preferred form, each carbon fiber skin comprises a sheet formed o... | 12/23/1997 |
| 5689093 | Cone of a speaker The cone of a speaker which has fibers perpendicularly fastened thereto by an electrostatic fiber implanting apparatus to eliminate the reflection of transverse waves between the diaphragm and the peripheral flange of the cone.... | 11/18/1997 |
| 5425002 | Acoustic pressure pulse generator An apparatus for generating acoustic pressure pulses in an acoustic medium has a membrane that can be driven which adjoins the acoustic medium and which is driven in an impact-producing manner. The membrane is mechanically pre-stressed so that it returns ... | 06/13/1995 |
| 5339286 | Composite electroacoustic transducer The composite electroacoustic transducer for reproducing medium and high frequencies comprises a transducer assigned to reproducing midrange frequencies provided with a dome-shaped membrane which extends in an annular shape. A transducer assigned to repro... | 08/16/1994 |
| 5304746 | Reduction of standing waves and intermodulation distortion in electro-acoustic transducer A pattern of blocks or other features is formed on the diaphragm of an electro-acoustic transducer. The features in the pattern extend along and adjacent to an edge of the diaphragm. The features in a pattern are preferably arranged along two parallel lin... | 04/19/1994 |
| 5251188 | Elongated-pattern sonic transducer A sonic transducer (10) includes an elongated diaphragm (12) secured to a base (14) by a clamping member (16). The shapes of the surfaces (26, 30) by which the base (14) and clamping element (16) engage the diaphragm (12) are different at the end regions ... | 10/05/1993 |
| 5123053 | Loudspeaker suspension A transducer comprises a diaphragm including a perimeter, a motor for causing the diaphragm to vibrate in response to an electrical signal corresponding to program material to convert the electrical signal to motion of the diaphragm and thus to an audio r... | 06/16/1992 |
| 5033093 | Compact microphone and method of manufacture A microphone has a diaphragm having a dome central portion being formed of laminate of a thin layer of synthetic resinous material and a thin wire mesh contacting the central portion. As surrounding attachment portion is provided so that the diaphragm is ... | 07/16/1991 |
| 4975318 | Improved acoustic carbon diaphragm An improved acoustic diaphragm may be produced by a process which includes the steps of impregnating non-woven fabric or woven fabric of carbon fiber having a high degree of elasticity with a thermosetting resin, thermally molding it into a diaphragm shap... | 12/04/1990 |
