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US20120008816 ELECTROACOUSTIC VIBRATING TRANSDUCER  
An electroacoustic vibrating transducer is disclosed. The electroacoustic vibrating transducer includes a frame defines a hollow space, a yoke positioned in the hollow space, and a elastic member...
US20080317276 HIGH EFFICIENT MINIATURE ELECTRO-ACOUSTIC TRANSDUCER WITH REDUCED DIMENSIONS  
The present invention relates to a miniature electro-acoustic transducer including a magnetic circuit, a diaphragm and a voice coil operatively connected to the diaphragm. The magnetic circuit...
US20070297639 Multiple magnet loudspeaker  
A multiple magnet dual-gap loudspeaker may generate increased magnetic flux to drive voice coils generating sound from the loudspeaker. The dual-gap dual-voice-coil loudspeaker allows enhanced...
US20070160256 Coaxial two-way drive unit for horn speakers  
A two-way drive unit for horn-loading speakers, comprising a fist voice coil drive unit associated with a second voice coil drive unit. The first unit is a frustum of a cone shape, whereas the...
US20090116681 VOICE COIL ASSEMBLY, LOUDSPEAKER USING THE SAME, AND METHOD FOR PRODUCING THE SAME  
A voice coil assembly capable of realizing a flat thin loudspeaker having a high efficiency, reduced divided vibrations, a flat frequency response, and reduced operation defects. The voice coil...
US20070183620 Selectable impedance, constant efficiency electromagnetic transducer  
An electromagnetic transducer such as an audio speaker, having three or more voice coils disposed in one or more magnetic air gaps. The voice coils can be combined in any permutation of...
US20110170736 SPEAKER WITH DUAL MAGNETIC CIRCUITS  
A speaker includes a case, a dome, a diaphragm, a first voice coil, a second voice coil, a first pole plate, a second pole plate, a first magnet, a second magnet and a yoke. The case is supported...
US20050031151 Speaker with adjustable voice coil impedance  
A loudspeaker includes a diaphragm, a magnetic core, and a plurality of coils in a flux communicating relationship with the magnetic core. The plurality of coils are connected to a switching...
US20070127766 Multi-channel speaker utilizing dual-voice coils  
A speaker that utilizes a dual voice coil speaker element to generate sound corresponding to more than one sound channel is disclosed. The speaker may be paired with a substantially identical...
US20080025551 VARIABLE IMPEDANCE VOICE COIL LOUDSPEAKER  
A variable-impedance electro acoustic transducer having multiple voice coils is disclosed. In one implementation, the loudspeaker includes a coil former around which three coils are wound, and a...
US20120257783 SINGLE MAGNET COAXIAL LOUDSPEAKER  
A coaxial loudspeaker for reproducing an electrical sound signal is provided. The loudspeaker has a magnetic driver assembly with a first annular slot and an opposed, coaxial second annular slot,...
US20090028374 SPEAKER AND SPEAKER APPARATUS  
A speaker capable of properly adjusting a spring characteristic with which a voice coil is driven and capable of being driven in large amplitude. When a position control coil wound around a bobbin...
US20060188120 Multiple active coil speaker  
A voice tube assembly for a loudspeaker comprising a basket, a cone, and a spider includes a first magnet. The first magnet is configured for attachment onto the basket and has a principle axis. A...
US20070230737 Extended multiple gap motors for electromagnetic transducers  
An electromagnetic transducer includes an electromagnetic dual-coil or multi-coil driver having at least one spacer member placed between at least two permanent magnets. The inclusion of at least...
US20120148086 COMPOSITE SPEAKER  
A composite speaker is disclosed that can more easily be made thin and small, and is configured so that the assembly process of the speaker is easy. A first space that opens to the rear is formed...
US20050078848 Power amplifier and method for split voice coil transducer or speaker  
The present invention relates to a method and power amplifier for providing an audio current comprising a first audio current and a second audio current to a split voice coil speaker having a first...
US20120321123 COMPACT COAXIAL CROSSOVER-FREE LOUDSPEAKER  
A loudspeaker assembly that converts electrical signal into sound waves in the full spectral range of an audio voltage. The loudspeaker assembly includes: a plurality of drivers; and a hollow...
US20070098189 Speaker drive system for headsets and method  
A speaker driver circuit for use in association with a source of audio signals and a single coil driven speaker, for communicating said signals to the speaker and for reducing unwanted noise in the...
US20060153419 Device having at least one loudspeaker and at least one coil  
In a device having at least one loudspeaker (21) and one coil (15), the influence of a magnetic field being generated by the loudspeaker (21) on a magnetic field being generated by the coil (15) is...
US20130108100 SPEAKER HAVING MULTIPLE COILS  
A speaker enclosure has an enclosure having an open front section. A partition is formed in the enclosure. A cone is coupled to the partition, wherein an outer perimeter of the cone is unattached...
US20110293133 SPEAKER  
A speaker includes a yoke defining a receiving cavity therein, a first magnet received in the receiving cavity of the yoke, a second magnet received in the receiving cavity of the yoke and opposite...
US20140056466 LOUDSPEAKER DRIVER WITH DUAL ELECTROMAGNET ASSEMBLIES  
Loudspeaker drivers are provided. According to one embodiment, a loudspeaker driver comprises a diaphragm, a connection tube, first and second voice coils, and first and second magnet assemblies....
US20070217647 Electro-Acoustic Converter, Module Using Same, Electronic Device, and Apparatus  
Disclosed is a speaker comprising a frame connected with a magnetic circuit having a magnetic gap, a voice coil disposed adjacent to but not in contact with an upper side of the magnetic circuit,...
US20050069165 Speaker assembly having vibrating element and magnetic loops  
A speaker assembly having a vibrating element and magnetic loops includes a frame, wherein the frame is provided with a vibrating element. The vibrating element has at least two sound coils, with...
US20060034481 Systems, methods, and devices for processing audio signals  
Certain exemplary embodiments provide a method comprising a plurality of activities, comprising: via a CPE gateway: initiating a communications connection between an audio device coupled to the CPE...
US20130051604 SPEAKER  
A speaker includes: a plurality of voice coil bobbins, each of which includes a voice coil; a diaphragm, which provided with the plurality of voice coil bobbins; and a wiring material fixed to the...
US20070041606 Apparatus and method for noise cancellation in communication headset using dual-coil speaker  
A communication headset is disclosed that includes a speaker assembly. The speaker assembly includes at least a first speaker coil and a second speaker coil. One speaker coil is for receiving a...
US20130301866 Acoustic Device  
The invention relates to an acoustic device and a method of making the same. The acoustic device comprises a diaphragm having an area and having an operating frequency range comprising a part in...
Matches 1 - 28 out of 28