Abstract: The invention relates to an acoustic loudspeaker which includes a magnetic field source. A mobile apparatus includes a diaphragm and a first winding capable of allowing passage of an electrical current representing the sound signal to be generated and of interacting with the magnetic field. The acoustic loudspeaker includes a second winding, both terminals of which are connected by a resistive component. Both terminals of the second winding are electrically isolated from the terminals of the first winding.

Abstract: In accordance with the invention, the disclosure presents a flat panel displaying and sounding system integrating a flat panel display with a flat panel sounding unit array. Generally, the flat panel displaying and sounding system comprises a panel surface for both displaying picture and emanating audible sound, a flat panel display means for said displaying picture and a flat panel sounding unit array means for said emanating audible sound. The flat panel system may be made by attaching a flat panel displaying layer with a flat panel sounding unit array. Furthermore, the flat panel system may be made by disposing a flat panel displaying layer inside layers of a flat panel sounding unit array. Furthermore, layer level integration may be used to implement function needed for displaying and function necessary for sounding on one integrated layer.

Abstract: Disclosed is a micro-speaker. A micro-speaker includes a frame, a magnetic circuit unit accommodating in the frame, a vibrating unit, an assistant coil attached to the frame and disposed below the diaphragm. The vibrating unit includes a diaphragm and a voice coil driving the diaphragm. The assistant coil includes an upper surface facing the diaphragm and an inclined surface connecting the upper surface and disposed closer to the voice coil than the upper surface.

Abstract: A speaker includes a base defining a pair of receiving cavities separated from each other in a longitudinal direction and an engaging portion disposed between the pair of receiving cavities, a pair of magnetic circuit systems received into the pair of the receiving cavities, a diaphragm attached on the base, a pair of voice coil members connecting with the diaphragm, and a suspension mounted on the base. The suspension defines a pair of separating portions separated from each other in a lateral direction. Each separating portion defines a fixing portion engaging with the engaging portion of the base, a pair of connecting portions extending from two ends of the fixing portion and towards the diaphragm, and a pair of supporting portions connecting with the connecting portion for engaging with the pair of voice coil members, respectively.

Abstract: An apparatus and a method for detecting vibration are disclosed. The apparatus comprises a housing, a magnetic structure forming a magnetic field in the housing, and a coil structure in the magnetic field, concentric of the magnetic structure. In response to external vibration, the coil structure and the magnetic structure are movable with respect to each other. The coil structure comprises at least two sets of coils overlapped in space, of which a first coil set is for detecting vibration and a second coil set is for applying control in accordance with a control signal.

Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.

Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion. The acoustic transducer may be a hybrid acoustic transducer.

Abstract: Single magnet coaxial loudspeaker having two air gaps on both sides of its faces, front gap of larger diameter for low frequency voice-coil and the opposite gap accommodating compression driver voice-coil. Front voice-coil drives low frequency membrane and rear voice-coil drives high frequency diaphragm, radiating sound waves through a phasing plug to the horn input through an opening into the magnetic structure, whereas the membrane acts as horn flair. Common region geometry around bottom pole of the magnetic structure controls flux line proportions between the two gaps. The five embodiments use series or parallel, inner or outer magnetomotive flux division. These are suitable for much simpler, more reliable and better balanced coaxial loudspeakers for professional and high-end markets.

Abstract: 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 and corresponds to the cavity. The magnetic field generator can produce a magnetic field and a reverse magnetic field to cause the magnetic field generator and the magnetic portion of the base to attract and repel each other, thereby vibrating the insulative flexible substrate.

Abstract: 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 from the enclosure forming a gap between the outer perimeter of the cone and the enclosure. A coil assembly is coupled to the cone. A magnet unit is coupled to the cone.

Abstract: In one embodiment, a co-axial speaker system for generating quality hi-fidelity sound with reduced distortion of wave propagation using a generally flat diaphragm and generally flat suspension.

Abstract: A system and method are provided for creating a loudspeaker system with low failure rate of sound production. The system uses a loudspeaker with more than one voice coil, a circuit to detect breakage of a voice coil and a switching circuit to steer the system input signal to a remaining good voice coil.

Abstract: A method is provided for making a synthetic jet ejector.

Abstract: 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 switch in communication with two of the coils such that when the switch is in a first position the loudspeaker has a first net impedance value, and when the switch is in a second position the loudspeaker has a second net impedance value. The impedance can be optimized to provide a driver with unique characteristics in each mode, including, but not limited to ideal amplifier drive impedances, similar or differing driver efficiencies, and varying bass performance in each mode.

Abstract: A speaker capable of suppressing deterioration of acoustic efficiency while allowing miniaturization of the speaker includes a first unit and a second unit each of which outputs sound. The first unit includes a diaphragm which vibrates back and forth to radiate sound; and plural suspensions which support, at different positions, an outer periphery of the diaphragm. At least one of air passages for channeling sound from the second unit to the outside is provided between the plural suspensions.

Abstract: The present invention relates to a flat-type speaker, and more specifically, to a flat-type speaker in which a plurality of magnetic circuits are horizontally connected in serial or in parallel such that one speaker is formed.

Abstract: This invention relates to acoustic transducers with stationary and moving coils, and methods for operating the acoustic transducers. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces sound. The time varying signal applied to the moving coil corresponds to at least a processed version of an input audio signal and is updated based on, at least, a version of the time varying signal applied to the stationary coil. Some embodiments include updating the processed version of the input audio signal in response to a magnetic flux value corresponding to the time-varying signal applied to the stationary coil. Some embodiments include updating the time-varying signal applied to the moving coil in response to a feedback signal.

Abstract: A method for fabricating a speaker is disclosed. The speaker is equipped with a case having a through cavity, an inner surface forming the cavity and an outer surface, a magnetic bowl coupled to the case, a magnet positioned in the magnetic bowl, a pole plate covering the magnet, a magnetic gap formed by the magnet and the magnetic bowl, a diaphragm supported by the case and vibrating along a vibrating direction, a voice coil connected to the diaphragm, and a hearing aid coil formed on the case. The method includes the steps of: providing a case made of thermoplastic doped with organometallic additive; activating the organometallic additive in the case by a laser beam for forming initial pattern of the hearing aid coil in the inner surface of the case; and bathing the case in copper solution for providing the initial pattern with copper plating layer.

Abstract: 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, each establishing a permanent magnetic field therein from a single magnet. Independently driven first and second voice coils are positioned within the respective one of the first and second annular slots, each being connected to a transducer element.

Abstract: A speaker unit is realized which directly drives a vibration plate having a low density, light weight, yet sufficient rigidity with a digital audio signal, and can thereby transmit vibration of a voice coil thereof to a carbonaceous acoustic vibration plate without loss. The present invention provides a digital speaker unit including a speaker body (14) comprising a carbonaceous acoustic vibration plate (25), a delta-sigma modulator (11) and a thermometer code conversion section (12) that convert a multi-value bit digital audio signal supplied from a digital sound source (10) to a digital signal with required bits, a plurality of voice coils (24) that cause to vibrate a plurality of the carbonaceous acoustic vibration plates (25) provided in accordance with the number of digital signal bits and a driver circuit (13) that individually drives each voice coil (24) based on the digital signal.

Abstract: 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. The connection tube has a first end section, a second end section, and a middle section. The first voice coil is connected to and surrounds at least a portion of the first end section. The second voice coil is connected to and surrounds at least a portion of the second end section. The first magnet assembly is configured to suspend the first voice coil in a first magnetic field and the second magnet assembly is configured to suspend the second voice coil in a second magnetic field. The connection tube intersects the diaphragm and the middle section of the connection tube is connected to the diaphragm.

Abstract: A speaker apparatus that even when being relatively thin and compact, realizes reduction of generation of abnormal noise by contact between a lead wire and another member, reduction of breakage of lead wire and reduction of deterioration of sound quality. The speaker apparatus is one comprising magnetic circuit (2) provided with a magnetic gap in which voice coil (33) is fitted with play; vibrator (3) directly or indirectly fixed to the voice coil (33); frame (5) supporting the vibrator (3), provided thereinside with the magnetic circuit (2); and terminal part (6) to which lead wire (4) from the voice coil (33) is connected, wherein lead path (7) for passage of the lead wire (4) coming from the voice coil (33) is disposed between the voice coil (33) fitted with play in the magnetic gap (G) and the terminal part (6) provided in the frame (5).

Abstract: A multi-magnet speaker is disclosed. The multi-magnet speaker includes a frame defining a hollow space, a magnetic system defining a yoke and a plurality of magnetic gaps positioned in the hollow space, a diaphragm mounted on the frame and a plurality of coils attached to the bottom of the diaphragm. The diaphragm includes a plurality of vibrating membranes each defining a dome part and an arcuate portion radially extending from the periphery of the dome part. Each of the coils is received in the corresponding magnetic gap to drive the corresponding vibrating membrane to vibrate.

Abstract: 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 volume permanent magnet that accommodates the voice coils. Each driver includes a cylindrically shaped voice coil affixed to a matching diaphragm. Each voice coil is configured coaxially in a cylindrical assembly, which is in electrical communication with an incoming audio voltage. Each driver is adapted to reciprocally move along the main longitudinal axis of each voice coil when stimulated by said incoming audio voltage.

Abstract: A loudspeaker magnetic motor utilizes a voice coil with two or more wire coils that are connected in parallel and that are layered on top of one another. The motor utilizes, as a magnetic field source, a permanent magnet and, more particularly, a permanent magnet that includes a rare earth metal such as a neodymium boron iron magnet.

Abstract: 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 which the diaphragm moves in whole body mode and a part which includes at least the first bending mode. The acoustic device also comprises a moving coil transducer adapted to move the diaphragm in translation and having a voice coil coupled to the diaphragm and a magnet system and adapted to exchange energy with the diaphragm. The acoustic device also comprises at least one mechanical impedance means coupled to or integral with the diaphragm. The positioning and mass of the transducer voice coil and of the at least one mechanical impedance means is such that the net modal transverse velocity over the area of the diaphragm tends to zero. The transducer comprises a moving coil assembly having a coil former on which are mounted a plurality of voice coils in an axially-spaced array.

Abstract: 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 to the first magnet, a first coil surrounding the first magnet, a second coil surrounding the second magnet, and a diaphragm drove to vibrate by both of the first coil and the second coil. A shape of the first coil is approximately a horse's hoof and defines a first linear side, a flexuous side and a pair of first arc sides coupled with two ends of the first linear side and two ends of the flexuous side.

Abstract: A loudspeaker magnetic motor utilizes a voice coil with two or more wire coils that are connected in parallel and that are layered on top of one another. The motor utilizes, as a magnetic field source, a permanent magnet and, more particularly, a permanent magnet that includes a rare earth metal such as a neodymium boron iron magnet.

Abstract: The present invention relates to magnetic field interface clothes performing contactless magnetic field communication with a mobile terminal, the magnetic field interface clothes includes: a receiving part in which a mobile terminal is received and a coil part performing contactless magnetic field communication with a coil part of the mobile terminal at a position facing a coil part of the mobile terminal is formed, wherein the coil part formed in the receiving part includes a first coil and a second coil, the first coil and the second coil are received in the receiving part to have different winding directions.

Abstract: An electroacoustical apparatus and method is described that alters the output properties of an audio device to improve the sound properties for both hearing impaired and normal hearing listeners. The device includes a coil element of specific design and may incorporate digital signal processing techniques to modify audio signal output. The electrical device and method of processing provides for the beneficial alteration of sound waves to an audio signal, and further modification of the audio signal to provide for improved loudness and clarity characteristics. The improved characteristics provide for greater intelligibility of the audio signal to persons with hearing impairments and to persons with normal hearing.

Abstract: Described is a vented speaker driver assembly utilizing a speaker driver having a pole piece that defines therein a vent that is not covered by a dust cap. The frame of the speaker driver is configured to be mounted to a structure's surface such that the pole piece of the driver is located within the structure's interior space. The vented speaker driver is configured to be utilized in a back-to-back vented driver assembly wherein the sound of more than one speaker driver is achieved in a footprint of only one driver and with minimized generation of physical vibrations from the assembly.

Abstract: 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 from the enclosure forming a gap between the outer perimeter of the cone and the enclosure. A coil assembly is coupled to the cone. A magnet unit is coupled to the cone.

Abstract: An electromagnetic vibration device includes a vibrating plate, a suspending frame, upper and lower basin frames, a voice coil, and a magnetic loop system. Multiple voice coil fixing slots are uniformly distributed on the circumference of the vibrating plate corresponding to the inserting pieces of the voice coil, and the inserting pieces are passed through the voice coil fixing slots of the vibrating plate and fixed to the vibrating plate. One end of the lead of the voice coil is embedded in a groove on back of the vibrating plate and connected to the terminal of the lower basin frame.

Abstract: 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 diaphragm, wherein each of the plurality of the voice coil bobbins is disposed next to an next voice coil bobbin, wherein the wiring material is fixed to a portion of the diaphragm between the next voice coil bobbin, wherein a one-side conductive line of voice coil bobbins is extended in a direction toward the next voice coil bobbin and is connected to the wiring material that is disposed between the voice coil bobbins, wherein the other-side conductive line is extended in another direction different from the direction of the one-side conductive line, and wherein the each of the plurality of voice coils is connected in series.

Abstract: An acoustic transducer including a sound producing cone that is activated by a voice coil cylinder having a pair of spaced electrical windings that are retained in spaced relationship from a surround ferromagnetic ring that is carried by a heat sink and wherein a magnetic subassembly is mounted within the voice coil cylinder. The voice coil cylinder is supported by a pair of spaced suspension members or spiders and by the sound producing cone.

Abstract: 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 on the frame to form a receiving room therebetween. The yoke includes a bottom portion and a side portion perpendicularly extending upward from the center of the bottom portion. A first magnetic gap is formed between the inner wall of the side portion and the outer wall of the magnet for receiving the first voice coil, and a second magnetic gap is formed between the outer wall of the side portion and the inner wall of the second magnet for receiving the second voice coil.

Abstract: 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 mounted on the frame. The elastic member includes a circular plane lamina and a plurality of elastic arms extending outwardly from the circumference of the circular plane lamina. The yoke includes a bottom wall and a sidewall extending vertically from the bottom wall, and the sidewall defines a plurality of gaps corresponding to the elastic arms. Each of the elastic arms is intermittently received in the gaps during the vibration of the elastic member.

Abstract: An improved speaker voice coil structure, the structure including: a bobbin; a first voice coil, wound around the bobbin and having a first terminal and a second terminal; a second voice coil, wound around the first voice coil and having a third terminal and a fourth terminal; and a third voice coil, wound around the second voice coil and having a fifth terminal and a sixth terminal. The improved voice coil structure thereby provides multiple optional connection terminals—from different layers with different values of impedance—for an input signal.

Abstract: A vibration device according to an embodiment of the present invention includes upper and lower cases combined with each other to form a case, a magnetic force generating unit provided on at least one surface of the upper and lower cases, a vibrating unit including at least one magnet disposed to be opposite to the magnetic force generating unit, and a weight, and at least one elastic unit configured to support the vibrating unit elastically, the elastic unit having a first portion directly contacting the upper case and a second portion contacting the vibrating unit. Further, the first portion is arranged on a first circumference and the second portion is arranged on a second circumference, and wherein a diameter of the first circumference is larger than a diameter of the second circumference.

Abstract: A speaker assembly, a method for manufacturing a speaker assembly and a wireless device are provided. Such a speaker assembly may include a diaphragm for generating sound, a transducer for causing the diaphragm to generate sound and an integrated inductive element that is electrically connected to the transducer. The diaphragm, transducer and integrated inductive element are contained within the speaker assembly.

Abstract: 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 volume permanent magnet that accommodates the voice coils. Each driver includes a cylindrically shaped voice coil affixed to a matching diaphragm. Each voice coil is configured coaxially in a cylindrical assembly, which is in electrical communication with an incoming audio voltage. Each driver is adapted to reciprocally move along the main longitudinal axis of each voice coil when stimulated by said incoming audio voltage.

Abstract: A dual-coil, dual magnetic gap electromagnetic transducer is provided where each voice coil is wired to include separate leads so that each individual voice coil may be driven by a separate amplifier or by a separate bridged amplifier. Signal processing may further be utilized to increase the output of the loudspeaker, to achieve extreme excursion without extreme distortion and to provide for alternative voice coil designs to address common problems with dual-coil, dual magnetic gap transducers, including, but not limited to, heat generation.

Abstract: An electrostatic speaker is constituted of a vibrator, conductive cloths, and elastic members, which are laminated together and woven together using strings. Since all the constituent elements are restrained in positioning by strings, the overall structure thereof is not substantially changed even when the electrostatic speaker is deformed in shape by bending or curving, wherein it is possible to secure the prescribed positional relationship between the constituent elements, which are not deviated in positioning. It is possible to introduce a sheet composed of a thermoplastic resin, which holds the vibrator and elastic members therein. The conductive cloths can be replaced with film electrodes, each of which is formed such that a conductive polymer layer is formed on a base film composed of a thermoplastic resin.

Abstract: A speaker device includes a pair of diaphragms disposed opposite each other, a frame configured to vibratably support an outer periphery of the diaphragms in a vibration direction, and a plurality of driving parts configured to support a rear surface of each of the diaphragms and vibrate the diaphragms in response to an audio signal. The plurality of the driving parts include a pair of magnetic circuits in which a magnetic gap is formed in a direction different from the vibration direction of the diaphragms, a pair of voice coils vibratably arranged in the magnetic gap in one axis direction, vibrating so as to move toward or away from each other in response to the audio signal, and a rigid vibration direction converter part direction-converting the vibration of the voice coils and transmitting the vibration to the diaphragms.

Abstract: 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, each establishing a permanent magnetic field therein from a single magnet. Independently driven first and second voice coils are positioned within the respective one of the first and second annular slots, each being connected to a transducer element.

Abstract: A variety of loudspeaker arrangements may have any of multiple adjacent magnetic circuits, single magnetic circuits, an improved loudspeaker voice coil assembly, multiple voice coil windings (124-127, 315-317), and commutated current. The radial direction of flux may alternate at adjacent poles and may have a controller that commands the current through each of the windings. The position of the moving components may be measured or inferred by the controller (213). An encoding track (318a) applied to the surface of the assembly may allow the assembly to function as part of a position transducer to permit appropriate action based on position. Calculated or sensed actual position may be used to determine the relative current in each of the windings and the controller may have compensation such as a motion control algorithm, thermal monitoring, and management of the driver.

Abstract: 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 includes first and second air gap portions adapted to receive first and second voice coil segments, respectively. The magnetic flux acting on the first voice coil segment is provided by inner magnetic means and first outer magnetic means in combination and the magnetic flux acting on the second voice coil segment is essentially provided by the inner magnetic means only.

Abstract: 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 one spacer member increases the axial dimension of the magnetic assembly of the driver so that the magnetic gaps in a dual-coil or multi-coil driver are moved farther apart than would occur with a corresponding electromagnetic driver using a permanent magnet instead of two permanent magnets separated by a spacer member.

Abstract: There is provided a speaker allowing an air in a space between a diaphragm and a frame not to leak outside, and allowing connecting wires electrically connected to the voice coil to be guided out to an outside. A speaker I includes: a frame 4; a magnetic circuit unit 2; a vibrating unit 3; and a wiring structure unit 5. A hole 28 is formed on the frame 4. The magnetic circuit unit 2 is attached to the frame 4. The vibrating unit 3 is received in the frame 4, and includes diaphragms 14, 15 vibrated by the magnetic circuit unit 2. An air in a space surrounded by the diaphragms 14, 15 and the frame 4 is sealed. The wiring structure unit 5 includes a tube member 38, into which lead wires 37 are inserted. The tube member 38 is pressed into a hole 28, and guides the lead wires 37 to an outside of the space.

Abstract: An electrostatic speaker is constituted of a vibrator, conductive cloths, and elastic members, which are laminated together and woven together using strings. Since all the constituent elements are restrained in positioning by strings, the overall structure thereof is not substantially changed even when the electrostatic speaker is deformed in shape by bending or curving, wherein it is possible to secure the prescribed positional relationship between the constituent elements, which are not deviated in positioning. It is possible to introduce a sheet composed of a thermoplastic resin, which holds the vibrator and elastic members therein. The conductive cloths can be replaced with film electrodes, each of which is formed such that a conductive polymer layer is formed on a base film composed of a thermoplastic resin.