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| Number | Title | Issue Date |
| 8406451 | Capacitive electroacoustic transducer and microphone There is provided a capacitive electro-acoustic transducer comprising an active diaphragm (20) and a first and a second diaphragm carrier (60). The active diaphragm (20) is accommodated between the first and second diaphragm carriers (60)... | 03/26/2013 |
| 8280097 | Microelectromechanical system diaphragm and fabricating method thereof A microelectromechanical system diaphragm is provided. The microelectromechanical system diaphragm includes a substrate, a first conductive layer, a second conductive layer, a first dielectric layer, and a second dielectric layer. The first conductive layer is dispo... | 10/02/2012 |
| 8131002 | Electric-acoustic transducer and electronic device An electro-acoustic transducer includes a diaphragm, a casing which is formed with an opening for directly or indirectly supporting the diaphragm, a first magnetic pole section provided on a side of the opening with respect to the diaphragm and having a magnetic pol... | 03/06/2012 |
| 8085969 | Full range planar magnetic microphone and arrays thereof Contemplated planar magnetic microphones have a magnet and diaphragm arrangement such that substantially homogenous vertical and high horizontal magnetic flux density is realized in the inter-magnet space. Most preferably, the diaphragm is disposed in the inter-magn... | 12/27/2011 |
| 8031901 | Planar speaker driver A planar magnetic driver includes covering plates that are maintained under tension to form a buckled or curved surface, thereby providing for a larger magnetic gap, and allowing for a larger excursion of the diaphragm and extended lower frequency response. Another ... | 10/04/2011 |
| 7940952 | Electro-acoustic transducer An electro-acoustic transducer includes a generally V-shaped diaphragm comprising a folded sheet of film material. The diaphragm also comprises two upper ends, a lower end, an inner surface, and an outer surface. A frame supports the diaphragm in at least the two up... | 05/10/2011 |
| 7940953 | Magnetic membrane suspension An electro-acoustic transducer has a membrane comprises a folded or curved sheet of film material. A frame supports the membrane in at least an upper end thereof. A resilient suspension connects the upper ends of the membrane to the frame. A driver system is attache... | 05/10/2011 |
| 7929725 | Acoustic apparatus and telephone conversation apparatus An acoustic apparatus has permanent magnets 2 and 3, which have north poles and south poles magnetized alternately in a stripe-like fashion, at the front and back of a diaphragm 1, respectively; and has a conductor circuit 4 wired on the ... | 04/19/2011 |
| 7873178 | Electro-dynamic planar loudspeaker A planar loudspeaker includes a shell pot, a magnet, a diaphragm, and a face plate. The magnet may be positioned in a cavity in the shell pot. The diaphragm may be coupled with the shell pot to cover an entrance to the cavity. The shell pot may include a conductive ... | 01/18/2011 |
| 7430297 | Moving ribbon microphone A ribbon microphone includes a diaphragm made of an aluminum foil. To provide a corrosion resistance and a favorable electrical connection in the junction between the aluminum foil and backplates for a long time, a gold deposited film is formed on opposite surfaces ... | 09/30/2008 |
| 7245049 | Vibrator and method for manufacturing the same A vibrator of the present invention comprises a coreless coil (2), a driver (4) including a magnet (4a) inserted in the coreless coil (2), a yoke (4b) for pinching the coreless coil (2) and facing the magnet ( | 07/17/2007 |
| 7236608 | Conductors for electro-dynamic loudspeakers Electro-dynamic loudspeakers typically include a diaphragm that is secured to a frame and has a conductor applied to at least one surface of the diaphragm. The conductor is connected to a power amplifier for providing electric current through the linear traces of th... | 06/26/2007 |
| 7203332 | Magnet arrangement for loudspeaker An electro-dynamic loudspeaker includes a frame, a plurality of magnets and a diaphragm. The frame includes a molded plastic body. The magnets may be molded into the frame in a determined configuration. The frame is mechanically coupled to the diaphragm such that th... | 04/10/2007 |
| 7177439 | Methods and apparatus for dissipating heat in a voice coil The present invention is directed to methods and apparatus for dissipating heat in a voice coil of a loudspeaker, where at least one of: a bobbin having a substantially cylindrical shaped wall member is operable to support the voice coil, and the wall member include... | 02/13/2007 |
| 7174024 | Flat acoustic conversion device A flat acoustic conversion device includes two magnets disposed so that their magnetic poles face upward arid are adjacent to or in contact with one another, and the magnetic pole faces of different polarities arc disposed alternately; a vibrating member disposed on... | 02/06/2007 |
| 7146019 | Planar ribbon electro-acoustic transducer with high SPL capability and adjustable dipole/monopole low frequency radiation A planar electro-acoustic transducer has an adjustable back cap option that provides a dipole/monopole radiation that has different roll-off characteristics. The planar electro-acoustic transducer includes a diaphragm and a plurality of front and rear magnetic bars.... | 12/05/2006 |
| 7146017 | Electrical connectors for electro-dynamic loudspeakers An electro-dynamic loudspeaker is typically provided with a diaphragm mounted to a frame in tension. The diaphragm is provided with a plurality of electrical traces that are disposed within a magnetic field of a plurality of magnets that are mounted to the frame. El... | 12/05/2006 |
| 7142688 | Single-ended planar-magnetic speaker A planar-magnetic electro-acoustic transducer including a support structure and a magnetic structure carried by the support structure, the magnetic structure comprising a multiplicity of high-energy magnets configured so as to have shared loop field maxima and local... | 11/28/2006 |
| 7136501 | Acoustically enhanced electro-dynamic loudspeakers An electro-dynamic loudspeaker is provided with dampening arrangements that contribute to improved acoustical properties for the electro-dynamic planar loudspeaker. The dampening arrangements include providing a frame having a curved sidewall surface for reducing st... | 11/14/2006 |
| 7106880 | Universal ribbon element-module for two or more membrane-widths with optimized flow and drive A loudspeaker module in the form of a ribbon element, where the module can be equipped with a membrane, 50 millimeters in width or narrower, and with any length from 50 millimeters to 2500 millimeters. The magnet system is equipped with so called booster-magnets in ... | 09/12/2006 |
| 7088837 | High efficiency planar magnetic transducer with angled magnet structure An acoustical speaker and planar magnetic transducer therefore wherein the transducer is provided with at least array of spaced magnets which are oriented having their pole faces at an angle with respect to a plane defining a surface of a sound producing diaphragm o... | 08/08/2006 |
| 7068807 | Speaker device To realize a speaker device capable of significantly improving sound quality with a simple construction. The speaker device applies electromagnetic force to a voice coil based on a supplied audio signal, and generates a sound wave according to the audio signal by vi... | 06/27/2006 |
| 7035425 | Frequency response enhancements for electro-dynamic loudspeakers In an electro-dynamic loudspeaker, vent holes are optimized to provide improved the magnetic flux characteristics while maintaining sufficient ventilation. In addition, ported and unported enclosures may be utilized with the electro-dynamic loudspeakers to enhance l... | 04/25/2006 |
| 7020301 | Loudspeaker A loudspeaker comprising at least one magnet 27, a yoke 24 fixed to a bottom surface of the magnet, a flat plate 26 fixed on an upper surface of the magnet, a magnetic circuit 29 having a magnetic gap 28 formed between the plate an... | 03/28/2006 |
| 6963654 | Diaphragm, flat-type acoustic transducer, and flat-type diaphragm A first conductor and a second conductor are provided at a diaphragm. The first and second conductors intersect magnetic force lines between north poles and south poles of permanent magnets M which are adjacent to one another. When electricity passes through the con... | 11/08/2005 |
| 6956953 | Electroacoustic transducer with field replaceable diaphragm carrying two interlaced coils, without manipulating any wires The present invention is directed to a diaphragmatic (planar) electroacoustic transducer that forms a complete sound radiating transducer and provides high efficiency and linearity. The diaphragm is easily exchangeable and rectangular in shape, and may be made of ve... | 10/18/2005 |
| 6934402 | Planar-magnetic speakers with secondary magnetic structure A planar magnetic transducer having enhanced magnetic structures which increases performance over a single-ended device but mitigates some of the drawbacks of double ended devices, including a supporting structure, a diaphragm incorporating a coil conductor at least... | 08/23/2005 |
| 6904158 | Speaker apparatus In an electromagnetic induction type speaker apparatus, individual constants are set in such a manner that the following formula is satisfied N×(R1×R2)1/2/{2 Π×L1×(1−k2) | 06/07/2005 |
| 6868166 | Chord-like vibration loudspeaker This invention is a loudspeaker that consists of some vibratory membranes and magnets. Every vibratory membrane is a part of a soft conductive tape and is put in a magnetic field. When the membranes conduct audio current, they vibrate air directly with their surface... | 03/15/2005 |
| 6845166 | Plane driving type electroacoustic transducer A plane driving type electroacoustic transducer having a film of diaphragm with a conduction pattern formed thereon and a magnetic circuit, wherein a vibration damping layer is provided on the diaphragm. ... | 01/18/2005 |
| 6834113 | Loudspeaker system A loudspeaker system, which has the ability to create a homogeneous sound over large distances, comprising at least one line-source of acoustical radiation, each comprising three or more essentially identical speaker-units arranged adjacent to each other at a center... | 12/21/2004 |
| 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 |
| 6560348 | Contact connections The invention proposes a contact connection for sound reproduction devices according to the flexural wave principle. Since the drive systems 21 of such installations require high current intensities and such current intensities could only be properly tran... | 05/06/2003 |
| 6535612 | Electroacoustic transducer with diaphragm securing structure and method An electroacoustic transducer which has at least one stator member with an operating surface and a suspended emitter diaphragm spaced from the operating surface of the stator member to enable the diaphragm to oscillate in response to an applied signal vol... | 03/18/2003 |
| 6434252 | Ribbon microphone A ribbon microphone having magnets positioned adjacent north and south pole pieces. The magnets are of uniform thickness along their lengths, and do not taper. The pole pieces are substantially the same width as the magnets. An offset ribbon is disposed i... | 08/13/2002 |
| 6205228 | Horn loaded pleated ribbon high frequency acoustic transducer with substantially uniform coupling An electro-dynamic acoustic transducer has a pleated diaphragm in which an accordion-like alternating movement of the adjacent pleats is perpendicular to the radiation (acoustic) axis of the transducer. Front and rear pole plates cooperate to provide a ma... | 03/20/2001 |
| 6185310 | Planar magnetic acoustical transducer stamped pole structures A planar magnetic acoustical transducer including a diaphragm with electrical circuit carrying conductors having a width substantially equal to a combined width of a plurality of magnetic fields created by equally spaced opposing rows of permanent magnets... | 02/06/2001 |
| 6111970 | Suspension for high power pleated ribbon transducer An electro-dynamic acoustic transducers has a pleated diaphragm in which an accordion-like alternating movement of the adjacent pleats is perpendicular to the radiation (acoustic) axis of the transducer. Formed metal combs having teeth in the spaces betwe... | 08/29/2000 |
| 6108433 | Method and apparatus for a magnetically induced speaker diaphragm An ultrasonic emitter device having broad frequency range capacity with relatively large diaphragm displacement compared to typical electrostatic diaphragm movement. The device includes a core member able to establish a variable magnetic field adjacent th... | 08/22/2000 |
| 5912863 | Electro-acoustic transducer An elongated, electrically conductive diaphragm is placed in a strongly magnetic field to produce a linear and an elongated sound source giving a high sound energy. At least two elongated diaphragms are positioned between intermediate and enclosing protec... | 06/15/1999 |
