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| Number | Title | Issue Date |
| 8144917 | Dynamic type unit with multiple magnetic field system The present invention relates to a dynamic type unit with a multiple magnetic field system, and more particularly, to a dynamic type unit including a magnet, a diaphragm and a moving coil such as a microphone or a speaker, wherein an auxiliary magnet is mounted arou... | 03/27/2012 |
| 8064631 | Electroacoustic transducer The invention provides an electroacoustic transducer capable of efficiently carrying out conversion from electric signals to sound or from sound to electric signals at low distortion, which requires no special shape nor processing as a magnet, requires no minute set... | 11/22/2011 |
| 7961902 | Speaker apparatus and manufacturing method thereof A speaker apparatus comprises: a drive cone transferring a drive power of a voice coil to the diaphragm; a diaphragm disposed in a driving direction; and a diaphragm disposed in a driving direction. The drive cone is fixed to a diaphragm support of a frame. An outer... | 06/14/2011 |
| 7724915 | Speaker device 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 c... | 05/25/2010 |
| 7706563 | Concentric radial ring motor A voice-coil transducer includes two radially concentric magnets, a voice-coil located in the gap between the inner and outer magnets, and a diaphragm coupled to the voice-coil. An audio loudspeaker includes the voice-coil transducer with two radially concentric mag... | 04/27/2010 |
| 7532737 | Loudspeakers, systems, and components thereof Improved loudspeakers, systems and components are adapted to interconnect with many forms of communication media. In one embodiment, a speaker is mountable within a receptacle. The speaker includes a magnetic driver and a diaphragm mounted to a frame. The frame incl... | 05/12/2009 |
| 7412065 | Acoustic transducer with folded diaphragm One embodiment of a low-profile transducer includes a at least one fin perpendicularly mounted on a planar diaphragm, with a voice coil mounted onto the fin. The voice coil may reside in a strong uniform magnetic field. The locations at which the diaphragm is connec... | 08/12/2008 |
| 7412066 | Microphone A sound recording and/or sound reproducing part loosely anchored/connected to a second part wherein the sound recording and/or sound reproducing part is levitated on a magnetic field. The sound recording and/or sound reproducing part and the second part in combinati... | 08/12/2008 |
| 7388964 | Loudspeaker, and module and electronic apparatus using the loudspeaker A loudspeaker is provided that satisfies requirements for both a small size and a high sound pressure. In addition, the heat capacity of the magnetic circuit and the heat dissipation of the voice coil are improved in this loudspeaker. Using at least two pieces of ba... | 06/17/2008 |
| 7379554 | Drive unit for electro-acoustic converter with dual magnetic circuits sharing permanent magnet An electro-acoustic drive unit including at least a first and a second drive unit, each provided with a pole gap for exciting respective voice coil assemblies, at least one permanent magnet means is arranged to be a part of the magnetic circuit of both the first and... | 05/27/2008 |
| 7376240 | Coil for an electroacoustic transducer An electroacoustic transducer comprising a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap therebetween, the magnetic circuit comprising a magnet inducing a magnetic field in the gap, the magnet having a surface ... | 05/20/2008 |
| 7317810 | Magnetic circuit and speaker A speaker and a magnetic circuit for a speaker, in which the high quality sound is obtained, are provided using a structure which is thin, light-weight and symmetrical in the vibration direction. In three sheets of layered magnets, the first magnet of the first laye... | 01/08/2008 |
| 7302077 | Electromagnetic driver for a planar diaphragm loudspeaker The invention relates to an electromagnetic driver comprising a soft magnetic core in the form of an E with three legs and a back, an alternating field driver, magnetically coupled to the soft magnetic core, for generating an alternating magnetic field in the soft m... | 11/27/2007 |
| 7263199 | Microphone assembly An electromagnetic transducer is described including a magnet assembly (50) and a conductive drive coil (52). The magnet assembly provides an emanating magnetic field within which the drive coil is located. The drive coil is a flat ring coil having a w... | 08/28/2007 |
| 7251342 | Single end planar magnetic speaker A single end planar magnetic speaker system having at least one thin film, flexible diaphragm (72, 90) having a front side and a rear side for converting an input electrical signal into a corresponding acoustic output, the at least one diaphragm including a p... | 07/31/2007 |
| 7242787 | Electromagnetic driving unit for a loudspeaker assembly An electromagnetic driving unit includes a magnet part and a coil part that is translatable along a translation axis with respect to the magnet part. A diaphragm extends from the coil part in a substantially radial direction with respect to the translation axis of t... | 07/10/2007 |
| 7239712 | Inductor-based MEMS microphone An inductor-based integrated MEMS microphone and a method of making the microphone is provided. The microphone structure includes a vibrating inductor that is suspended over another stationary inductor such that the magnetic field induced from one inductor induces a... | 07/03/2007 |
| 7236607 | Loudspeaker with a first and a second diaphragm body A loudspeaker includes a frame, a diaphragm and an electric driving arrangement for moving the diaphragm along an axis with respect to the frame. The diaphragm includes an outer conical first diaphragm body and an inner conical second diaphragm body invertedly orien... | 06/26/2007 |
| 7227970 | Shorting ring fixture for electromagnetic transducer An electromagnetic transducer such as an audio speaker, having a motor structure in which a shorting ring that sinks eddy currents also serves as a permanent fixture to provide coaxial alignment of two or more components within the transducer. These components could... | 06/05/2007 |
| 7215064 | Piezoelectric switch for tunable electronic components A piezoelectric switch for tunable electronic components comprises piezoelectric layers, metal electrodes alternated with the layers and contact pads. Cross voltages are applied to the electrodes, in order to obtain an S-shaped deformation of the switch and allow co... | 05/08/2007 |
| 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 |
| 7197155 | Magnet assembly for loudspeakers A magnet assembly having inner and outer yokes of magnetic flux conductive material which together define an annular air gap and a radially oriented magnet sandwiched between the inner and outer yokes such that a first face of a first magnetic polarity contacts the ... | 03/27/2007 |
| 7161791 | Variable capacitance membrane actuator for wide band tuning of microstrip resonators and filters A device for varying the capacitance of an electronic circuit is disclosed. The device comprises a flexible membrane located above the electronic circuit, a metal layer connected to the flexible membrane, and bias circuitry located above the membrane. Variation of t... | 01/09/2007 |
| 7158651 | Electromagnetic driver for a planar diaphragm loudspeaker The invention relates to an electromagnetic driver comprising a soft magnetic core in the form of an E with three legs and a back, an alternating field driver, magnetically coupled to the soft magnetic core, for generating an alternating magnetic field in the soft m... | 01/02/2007 |
| 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 |
| 7142687 | Electroacoustic converter An electroacoustic transducer 20, such as a speaker, a headphone, an earphone, a microphone, an acoustic wave sensor, etc., includes magnet plates 21 and 22, the entirety of which are formed like a disk or a ring; and an acoustic diaphragm 23... | 11/28/2006 |
| 7120271 | Internal magnetic circuit and loudspeaker system incorporating the same An internal magnetic circuit is formed by a plate forming a pole piece, a vertically magnetized magnet attached to a bottom face of the plate, and a yoke attached to a bottom face of the magnet. A magnetic gap is formed between the plate and the yoke. The yoke inclu... | 10/10/2006 |
| 7106878 | Speaker and mobile terminal device A speaker includes a first magnet; a second magnet provided so as to surround the first magnet; a yoke for connecting the first magnet and the second magnet; a first voice coil; a second voice coil; a first diaphragm connected to the first voice coil; a second diaph... | 09/12/2006 |
| 7099489 | Twin magnetic loop multifunctional vibrator-speaker transducer 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 devi... | 08/29/2006 |
| 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 |
| 7065225 | Electromagnetic transducer having a low reluctance return path An electromagnetic transducer, such as an audio speaker, includes a return path member which is a pole piece for external magnet geometries or a cup for internal magnet geometries. The magnetic flux return path for the primary drive magnet is through a first portion... | 06/20/2006 |
| 7062063 | Electroacoustic transducer An electroacoustic transducer includes a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap therebetween. The magnetic circuit includes a magnet inducing a magnetic field in the gap, the magnet having a surface cons... | 06/13/2006 |
| 7057314 | Electromagnetic motor system capable of removing heat away from its magnetic gap An electromagnetic drive motor assembly (EDMA) has at least one bridge that extends along a radial direction to conduct heat away from the magnetic gap and towards the outer surface of the EDMA. The EDMA includes a conductive ring between a first plate and a second ... | 06/06/2006 |
| 7054460 | Micromachined magnetically balanced membrane actuator The present invention relates to an miniature actuator especially suitable for hearing aid applications. The actuator according to the present invention operates according to the change in reluctance principle. In particular, the actuator according to the present in... | 05/30/2006 |
| 7050602 | Low capacitance receiver coil The disclosure relates to electroacoustic receivers of the type which incorporate a reed armature. Thus, a receiver comprises a coil, magnets, pole pieces and a reed armature which passes through a central tunnel defined by the coil. A central portion of the reed li... | 05/23/2006 |
| 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 |
| 7012345 | Electromagnetic motor with flux stabilization ring, saturation tips, and radiator The present invention provides an electromagnetic drive motor assembly (EDMA) that has an inner flux return assembly formed from an upper pole piece and a lower pole piece oppositely disposed relative to each other along the center of the EDMA. An annularly position... | 03/14/2006 |
| 7006653 | Compact high performance speaker A speaker has an annular magnet structure. First and second annular magnets are arranged concentrically with each other and connected by a shunt at one end and a pole-defining structure at the other end to concentrate magnetic flux in a cylindrical voice coil gap. T... | 02/28/2006 |
| 7006654 | Push-pull electromagnetic transducer with increased Xmax An electromagnetic transducer such as an audio speaker, having an improved geometry in the positioning of its voice coils relative to its magnetic air gaps, facilitating a greater linear travel. The transducer has a push-pull geometry with at least two voice coils. ... | 02/28/2006 |
