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Electrical Audio Signal Processing Systems And Devices > Electro-acoustic Audio Transducer > Electromagnetic (e.g., Dyynamic)

Electromagnetic (e.g., Dyynamic)

Electromagnetic (e.g., Dyynamic) patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

10/30/14 - 20140321690 - Double coil speaker
An audio system that comprises an electro-acoustic transducer connected to a first driver circuit and a second driver circuit, which electro-acoustic transducer comprises a first coil stacked on a second coil mechanically linked to a membrane, with the coils oscillatingly suspended in the magnetic field of a permanent magnet focused...

02/06/14 - 20140037126 - Electrically conductive membrane pump/transducer and methods to make and use same
An improved electrically conductive membrane pump/transducer, such as a graphene membrane transducer....

07/25/13 - 20130188822 - Magnet-less loudspeaker
The instant disclosure relates to a loudspeaker, which includes a ferrite core, a voice coil, and a movable membrane. The voice coil is wound around the core and cooperatively defining an exciting device. The movable membrane is disposed in close proximity to the exciting device with a gap formed thereinbetween....

06/27/13 - 20130163806 - Driver assembly for loudspeakers
In one embodiment, a loudspeaker system is provided comprising a motor assembly for driving a diaphragm assembly, where the motor assembly includes a pole piece configured to receive an inductance sleeve. The motor assembly also comprises a permanent magnet, a first shorting ring, and a second shorting ring, with the...

06/27/13 - 20130163807 - Electro-acoustic transducer and method of manufacturing the same
An electro-acoustic transducer includes an insulative flexible substrate, a base, and a magnetic field generator. The base includes a cavity and a magnetic portion disposed below the cavity. The insulative flexible substrate is configured to cover the cavity. The magnetic field generator can be disposed on the insulative flexible substrate...

06/20/13 - 20130156253 - Electrodynamic speaker structure having mems technology
Said electrodynamic speaker structure having MEMS technology, comprising a stator-forming means (2), diaphragm-forming means (3), and resiliently shape-changing means (4) for connecting all of said means, is characterized in that the stator-forming means (2), diaphragm-forming means (3), and connecting means (4) are made of a single part by machining a...

06/13/13 - 20130148840 - Speaker
A speaker includes a base having a groove, a tube received in the groove, a magnet disposed in the tube, a first ring-shaped body and a washer mounted, from top to bottom, on an outer side of the tube sequentially, and a second ring-shaped body connected to an edge of...

03/14/13 - 20130064413 - Acoustic loudspeaker
Acoustic loudspeaker comprising: a movable membrane; a source of constant magnetic field, a coil mechanically secured to said membrane and interacting with the magnetic field so as to displace the membrane, when it is traversed by an alternating current, characterized in that the membrane carries the coil at its periphery,...

01/17/13 - 20130016871 - Low profile greeting card speaker
A low profile miniature speaker configured for use in greeting cards such as sound generating greeting cards and other novelties. The thickness of the speaker is minimized while maintaining the sound quality and increasing strength. The speaker magnet is counter-sunk into the housing of the speaker, thereby decreasing overall thickness....

11/22/12 - 20120294473 - Low cost programmable sound recording and playback device and method for communicating with, and recharging of, the device
A low cost sound recording and playback device and a low cost method for wirelessly communicating with, and recharging of, the device. The device utilizes commonly available electronic components generally included in electronic sound producing devices thereby allowing for lowest cost of manufacture. The device includes a low cost low-power...

11/01/12 - 20120275638 - Sandwich-type woofer with two sound wave propagation directions and a magnetic-looped device thereof
A sandwich-type woofer with two sound wave propagation directions includes a first magnetic-conducting plate unit, a second magnetic-conducting plate unit, a magnet unit, a coil frame, a first vibrating unit, a second vibrating unit, a first coil and a second coil. The magnet unit is sandwiched between the first and...

10/25/12 - 20120269378 - Loudspeaker magnet assembly
A loudspeaker magnet assembly for a loudspeaker transducer having a voice coil is provided that has a low profile construction. The loudspeaker magnet assembly may include: a first magnet assembly; top plate position below the first magnet assembly; second magnet assembly positioned below the top plate; and bottom plate positioned...

10/18/12 - 20120263336 - Loudspeaker magnet having a channel
A transducer magnet for a low profile loudspeaker transducer is provided having a voice coil, surround suspension, diaphragm, and top plate. The transducer magnet may include a first magnet assembly, including an annular outer magnet having an outer perimeter, an outer diameter and an inner diameter. The inner diameter defines...

07/12/12 - 20120177244 - Speaker
A speaker includes a holder forming a hollow space, a magnetic system received in the hollow space, a suspension assembled with the holder and defining a supporting portion, a pair of fixing portions far away from the supporting portion and fixed on the holder, and a plurality of arm portions...

06/21/12 - 20120155694 - Multi-layer armature for moving armature receiver
A multi-layer armature for a moving armature receiver. The armature includes a first armature layer and a displacement region. The first armature layer includes a first surface and a second armature layer having a second surface positioned adjacent to the first surface. The displacement region provides relative displacement between the...

06/21/12 - 20120155695 - Speaker device for a portable terminal
A speaker device for a portable terminal includes: an electromagnetic wave noise shield member mounted on a circuit board; a speaker unit mounted on the electromagnetic wave noise shield member, the speaker unit producing sound; and a resonance space formed by the electromagnetic wave noise shield member and the circuit...

04/19/12 - 20120093353 - Micro speaker
A speaker comprises a permanent magnet (2) and a coil (8) positioned around the permanent magnet (2) and attached to a membrane (10), wherein the membrane comprises an elastomer of thickness less than 0.3 mm and with a Young's modulus below 100 MPa....

03/15/12 - 20120063631 - Method for manufacturing spiral coil, the spiral coil, and electro-magnetic acoustic transducer including the same
A method for manufacturing a spiral coil, the method including: forming a solenoid having a diameter larger than a length by spirally winding an insulated electric wire; forming a spiral coil having folded corners by folding four corners in a circumference direction with respect to the solenoid; fixing the folded...

01/19/12 - 20120014555 - Electromagnetically-countered speaker systems and methods
Electromagnetically-countered speaker systems for generating acoustic sounds according to dynamic signals supplied thereto while minimizing irradiation of harmful electromagnetic waves therefrom which do not include speaker magnets but include driver members for generating the sounds while emitting such harmful waves and counter members for generating magnetic forces for providing such...

12/22/11 - 20110311089 - Acoustic conversion device and acoustic conversion device assembly method
An acoustic conversion device includes: a driving unit including a pair of magnets disposed so as to face each other, a yoke to which the pair of magnets are attached, a coil to which driving current is supplied, a vibrating portion which vibrates when driving current is supplied to the...

10/20/11 - 20110255731 - Transducer for stapedius monitoring
An electro-magnetic transducer assembly includes a first component. The first component includes at least one magnet, and optionally a first attachment mechanism for attaching the first component to a vibrating structure. A coil assembly includes a second attachment mechanism for removably attaching the coil assembly to the first component. The...

10/20/11 - 20110255732 - Multifunctional micro speaker
A multifunctional micro speaker including a frame; a diaphragm having an outer circumferential portion fixed to the frame; a voice coil fixed to a lower surface of the diaphragm; a first suspension having an outer circumferential portion fixed to the frame and having a predetermined elasticity; a yoke fixed to...

08/25/11 - 20110206230 - Inertial vibration exciter
An inertial vibration exciter having a magnet assembly defining an annular gap, a coil assembly disposed in the annular gap, suspension means mounting the coil assembly for reciprocating movement in the gap, means coupling the coil assembly to a member to be vibrated, and a hermetically sealed housing in which...

08/11/11 - 20110194723 - Magnetic diaphragm and manufacturing method thereof
An exemplary magnetic diaphragm is applied to an electro-acoustic transducer. The magnetic diaphragm has a base formed with a magnetic layer thereon by a film deposition method. The base with the magnetic layer thus has magnetism to interference with a magnetic circuit of the electro-acoustic transducer. A manufacture method of...

06/16/11 - 20110142277 - Accoustic device
An acoustic device intended to operate pistonically and in bending comprising a panel-form acoustic radiator, a magnetic drive system including a voice coil on a tubular bobbin, the bobbin being directly coupled to the radiator to drive the radiator directly; and a coupling device connected to the bobbin, and to...

03/03/11 - 20110051985 - Piezoelectric micro speaker having piston diaphragm and method of manufacturing the same
Provided are a piezoelectric micro speaker having a piston diaphragm and a method of manufacturing the piezoelectric micro speaker. The piezoelectric micro speaker includes: a substrate having a cavity formed therein; a vibrating membrane that is disposed on the substrate and covers at least a center part of the cavity;...

02/10/11 - 20110033077 - Magnet system and method of manufacturing the same
A method of manufacturing a magnet system (101, 201) for an electro-acoustic transducer (100, 200) comprising a magnet element (105, 205) and at least one pole plate (106, 107, 206, 207), is described, wherein the method comprises providing the magnet element (105, 205) having a first coating layer comprising a...

12/09/10 - 20100310110 - Diaphragm and micro-electroacoustic device incorporating the same
A diaphragm includes a central portion in a center of the diaphragm and an external portion surrounding the central portion. The central portion includes a central section in a center of the central portion, a peripheral section at an outer periphery of the central portion and a connecting section between...

11/04/10 - 20100278370 - Motor structure of loudspeaker
A motor structure of loudspeaker comprises a magnet, a top plate, a bottom plate, and a pole piece. The magnet has two opposite sides. The top plate rests on one of the two sides of the magnet and jointly forms a central bore with the magnet. The bottom plate supports...

08/05/10 - 20100195861 - Audio speaker illumination system
An audio system with an illumination mechanism is disclosed. One embodiment includes a device which can be mounted in the center of an audio speaker and used to create an optical effect....

07/01/10 - 20100166247 - Flexible luminescent electro-acoustic transducer and electronic device using the same
An electro-acoustic transducer according to the present invention is provided. The electro-acoustic transducer includes a conductive plate with a plurality of openings, an electret diaphragm and a fluorescent layer. The electret diaphragm is positioned on the conductive plate and has a film body and an electrode layer. The film body...

06/24/10 - 20100158304 - Diaphragm for an electroacoustic transducer, and electroacoustic transducer
A diaphragm (6) for an electroacoustic transducer is preferably designed to be essentially rectangular and has a diaphragm inner region (20) for sound conversion and a diaphragm outer region (21) for attaching the diaphragm (6) and a diaphragm intermediate region (22) which lies between the diaphragm inner region (20) and...

05/20/10 - 20100124352 - Micro magnetic device with magnetic spring
A micro magnetic device having a body defining at least part of an enclosed chamber, the body comprising a first sidewall and a second sidewall. A pole comprising a soft magnetic material is within the chamber and an electrically conductive coil is positioned around the pole. A diaphragm is connected...

05/06/10 - 20100111351 - Sound generator
A sound generator, particularly a loudspeaker, configured to emit sound, comprising a rigid element (2) enclosing a plurality of air compartments (3), wherein the rigid element (2) has a back side (B) comprising apertures (4), and a front side (F) that is closed, wherein the generator is provided with at...

04/01/10 - 20100080409 - Dual-mode loudspeaker
An apparatus uses a transducer to produce vibration in the ultrasonic frequency range and in the audible frequency range. A membrane or cantilever structure is coupled to the transducer to produce acoustic waves. When the vibration is in the audible frequency range, the membrane structure works like a conventional loudspeaker....

02/25/10 - 20100046787 - Audio device for improved sound reproduction
The present invention relates to an audio device comprising a first audio path comprising a loudspeaker for reproducing an audio signal, and a second audio path comprising in series: a band-pass filter (22) for passing frequency components of the audio signal lying between a first frequency and a second frequency,...

02/11/10 - 20100034418 - High performance micro speaker
A micro speaker having a first core assembly and a second core assembly, with a diaphragm between the first and second core assemblies. Each of the core assemblies includes a housing with a pole and a cover plate, and a permanent magnet within the housing. At least one of the...

01/28/10 - 20100021000 - Sound producing system
A sound producing system includes an electro-acoustic transducer having an electromagnetic motor for moving a diaphragm of the transducer back and forth to create acoustic waves. The diaphragm has a surface that includes one or more of a surface of a dust cap of the diaphragm, a surface of a...

01/07/10 - 20100002900 - Apparatus and methods for generating pressure waves
Actuator apparatus for generating a physical effect, at least one attribute of which corresponds to at least one characteristic of a digital input signal sampled periodically in accordance with a clock, the apparatus comprising at least one array of moving elements each constrained to travel alternately back and forth along...

07/02/09 - 20090169047 - Speaker
A speaker includes a sound source, a rod-like member whose base end is in contact with the sound source, and a pair of flexible wing members whose ends are attached to the tip of the rod shape member, and whose other ends are free....

06/25/09 - 20090161904 - Speakerphone using adaptive phase rotation
An improved speakerphone for a cellular telephone, portable telephone handset, or the like. In one embodiment, a receiver provides an audio signal, and a first phase-shifter phase-shifts the audio signal by a first phase-shift amount. A second phase-shifter phase-shifts the audio signal by a second phase-shift amount and drives a...

06/11/09 - 20090147984 - Electroacoustic transducer
An electroacoustic transducer comprises an electric sound conversion section that vibrates a mechanical device based on an electric signal so as to emit a sound wave; and an electromagnetic wave radiation section that generates and emits an electromagnetic wave from the electrical signal....

06/04/09 - 20090141925 - Electro-dynamic transducer with a slim form factor
In one embodiment of the present invention, an electro-dynamic transducer is disclosed including a diaphragm, a first suspension suspending the diaphragm, a coil former attached to the diaphragm, the coil former having a first, inner portion, and a second, outer portion, arranged coaxially in relation to each other, a coil...

03/05/09 - 20090060250 - Loudspeaker with replaceable motor assembly
A loudspeaker is provided in which precise alignment is obtained between the frame and motor assembly before they are connected to one another so that a voice coil coupled to the frame may be properly radially and vertically positioned with respect to a magnetic gap in the motor assembly while...