Abstract: A low distortion flat diaphragm provided with a diaphragm. A periphery of the diaphragm is defined as a fixing region and a middle portion thereof is defined as a vibrating region. The diaphragm is provided with an electric transduction coil located in the vibrating region, and a coil terminal and coil locating and wiring located in the fixing region. The diaphragm is further provided with a mass balancing line that makes a mass center of the vibrating region be matched with a mechanical center. The diaphragm is further provided with two brim compliant balancing lines. The brim compliant balancing lines and fan-out lines are symmetrically arranged in an X shape relative to a center axis of the diaphragm. The utility model eliminates cutting oscillation and sound distortion generated by unbalanced distribution of mass of the diaphragm effectively in a locating and wiring way of improving the electric transduction coil.

Abstract: An alternate venting path can be employed in a sensor device for pressure equalization. A sensor component of the device can comprise a diaphragm component and/or backplate component disposed over an acoustic port of the device. The diaphragm component can be formed with no holes to prevent liquid or particles from entering a back cavity of the device, or gap between the diaphragm component and backplate component. A venting port can be formed in the device to create an alternate venting path to the back cavity for pressure equalization for the diaphragm component. A venting component, comprising a filter, membrane, and/or hydrophobic coating, can be associated with the venting port to inhibit liquid and particles from entering the back cavity via the venting port, without degrading performance of the device. The venting component can be designed to achieve a desired low frequency corner of the sensor frequency response.

Abstract: An electrodynamic acoustic transducer is disclosed, which comprises at least one coil with a coil wire being wound around a loop axis and a magnet system being designed to generate a magnetic field transverse to a longitudinal extension of the coil wire and transverse to the loop axis. Furthermore, the electrodynamic acoustic transducer comprises a membrane, which is fixed to the at least one coil and to the magnet system or to a frame/housing of the electrodynamic acoustic transducer. In addition, the electrodynamic acoustic transducer comprises a suspension system, which is fixed to the at least one coil and to the magnet system or to said frame/housing. In detail, the suspension system is fixed to the at least one coil in a region of a side wall of the at least one coil, which is oriented parallel to the loop axis.

Abstract: Known planar dynamic sound transducers include a flat, multipole magnet arrangement having parallel magnet bars which are arranged with intermediate spaces and which have a uniform magnetization in the direction of one of the short dimensions. The magnet bars are parallel to the conductors of a coil that are applied to a diaphragm and on their side towards the diaphragm include precisely one kind of magnetic poles. The current planar dynamic sound transducer includes a magnet plate with elongate air gaps extending transversely relative to the conductor. The magnet plate is one-sided multipole magnetized so that on the side towards the diaphragm and the conductor it includes at least one North pole and one South pole respectively at both sides along each air gap. The width of the air gaps in the magnet plate can be freely selected because it does not depend on the width of the conductor tracks.

Abstract: A vibration motor is provided in the present disclosure. The vibration motor includes a housing with a receiving space; a vibration module, received in the housing; elastic parts, used for suspending the vibration module in the housing; first voice coils, fixed on the housing and used for driving the vibration module to vibrate in the horizontal direction; and a second voice coil, fixed on the housing and used for driving the vibration module to vibrate in the vertical direction.

Abstract: An electrodynamic sound transducer has a diaphragm, a dome and a surround and a voice coil. The sound transducer further has a first magnet ring and a second magnet ring as part of the magnet system, the first magnet ring and second magnet ring being arranged on opposite sides of the diaphragm. The voice coil is coupled with the diaphragm and is arranged approximately on or outside of the circumference of the first magnet ring and second magnet ring.

Abstract: An acoustic transducer comprising: a flexible membrane; and a tension actuator, wherein the tension actuator is configured to be electrically controllable and define to the acoustic properties of the transducer dependent on the tension of the membrane.

Abstract: A vibrating element includes a diaphragm and a voice coil. The diaphragm has a first surface and a second surface opposite to each other, in which the first surface includes a first conductive region and a second conductive region separated from the first conductive region. The voice coil is disposed at the first surface of the diaphragm, in which two ends of the voice coil are respectively electrically connected to the first conductive region and the second conductive region, and the two ends of the voice coil are located within a region circled by the voice coil on the first surface.

Abstract: An electromagnetic device includes a housing, a planar coil disposed inside the housing, and a magnetic diaphragm disposed inside the housing, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated from the magnetic diaphragm, and wherein the magnetic diaphragm is moveable in the presence of an exterior pressure.

Abstract: The invention provides an electronic device and an electro-acoustic transducer thereof. The electronic device includes a main body and an electro-acoustic transducer carried by the main body. The electro-acoustic transducer includes a first electret diaphragm, a second electret diaphragm and a plate. The first electret diaphragm generates vibrations according to a first electrical signal and the second electret diaphragm generates vibrations according to a second electrical signal. The plate includes a plurality of holes formed thereon and is disposed between the first electret diaphragm and the second electret diaphragm. Additionally, the electronic device further includes a decorative layer formed on the first or the second electret diaphragm.

Abstract: An electrical-acoustic transducer includes a housing, a magnetic circuit device, a voice coil and a diaphragm. The magnetic circuit device is disposed in the housing and generates a magnetic circuit. The voice coil is disposed on the path of the magnetic circuit, and configured for generating magnetism upon receiving an electrical power. The diaphragm is made of metal, fixedly combined with the voice coil and having a scraggy cross section. When the voice coil of the electrical-acoustic transducer generates the magnetism according to the electrical power and interacts with the magnetic circuit, the diaphragm vibrates so as to generate sound.

Abstract: A small and highly efficient loudspeaker, capable of handling high power, yet capable of being manufactured at reasonable cost, uses energy absorbing surfaces on a rear side of its diaphragm and as part of an enclosure that is integrated with its frame.

Abstract: On one surface of a piece of wooden sheet, a cloth or paper is adhered to make an adhered sheet. An approximately V-shaped notch is provided on the adhered sheet, the adhered sheet is wetted to be softened, and a lubricant which acts to keep water is impregnated thereinto. Edge portions of the notch are overlapped, and the adhered sheet is tentatively molded in an approximately horn shape by a first hot press molding. The adhered sheet is then dried, impregnated with thermosetting resin, and half-dried. The adhered sheet is subject to a second hot press molding. A moisture-proof agent is applied on the adhered sheet, a center hole for a voice coil and periphery are removed to make a speaker diaphragm having a predetermined dimension and shape.

Abstract: This invention provides a method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and where the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) that is at least about 1 mil. thick. The invention further provides for a loudspeaker diaphragm, where the diaphragm is a composite material formed of at least two layers of ceramic material having a metal substrate therebetween and where the thickness of the metal substrate is no more than 86% of the thickness of the composite material.

Abstract: 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 very thin polyamide film with a plurality of aluminum conductors formed on one side of the diaphragm. The plurality of conductors form two identical and symmetrical coils such that conductors of each coil are interlaced. The two sections of the coils are disposed in dense air-gaps of the magnet system, which comprises a plurality of high (BHmax) Neodymium magnets. The binary interlaced coils can be utilized in a number of modes, for the purpose of accomplishing a variety of operating modes.

Abstract: An electro-acoustic transducer (1) is proposed for a component operating with surface waves, in particular for a surface wave filter, in which, to suppress interfering excitation ensuing in the gap region, a variation of the gaps (4) is implemented with regard to at least one feature selected from transversal arrangement, size and shape. Due to the slight dimension change (&Dgr;D) in comparison to the finger length, the desired primary excitation in the transducer remains approximately unchanged, however the interfering excitation is displaced or divided, and therewith made ineffectual.

Abstract: The invention provides a speaker, in which a coil wire withstands a large amplitude motion caused by vibration of a voice coil bobbin and a diaphragm, and in which a bias of weight of the voice coil bobbin and the diaphragm caused by a constitution of the coil wire is reduced to a minimum, therewith a speaker is provided with reliability and a superior sound quality. The coil wire, winding around the voice coil bobbin (80), is composed of a core thread having a bending strength and a heat-resistance and is wound by a conductive material. An end of the coil wire is directly connected to an external input terminal (90) attached to a frame (50).

Abstract: A diaphragm includes a vibratory membrane and at least one nickel titanium memory metal member having a shape that can be mechanically adjusted with a heating signal. The mechanical adjustment of the at least one nickel titanium memory metal member tunes the frequency response of the vibratory membrane in the diaphragm. The at least one nickel titanium memory metal member can be a sheet providing a vibratory membrane, or sheet sections or wire made of nickel titanium memory metal bonded to a vibratory membrane.

Abstract: This invention provides a method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and where the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) that is at least about 1 mil. thick. The invention further provides for a loudspeaker diaphragm, where the diaphragm is a composite material formed of at least two layers of ceramic material having a metal substrate therebetween and where the thickness of the metal substrate is no more than 86% of the thickness of the composite material.

Abstract: A method of manufacturing speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate and wherein the core is formed by stamping a sheet of standard gauge aluminum to form a speaker core and then deep anodizing the core to obtain a ceramic layer of alumina on each surface (Al2O3) which is at least about 1 mil. thick.

Abstract: Planar magnetic acoustic transducer diaphragms are formed from an electrical non-conducting membrane and metallic layer laminate by selectively removing portions of the metallic layer to create at least one electrical conductor circuit pattern and at least one passive metallic area both of which are of a predetermined size and configuration to balance modal behavior of the diaphragms when in use.

Abstract: A diaphragm for a speaker comprises a metal cone 2 and a paper auxiliary cone 4 bonded integrally to the center portion of the metal cone 2.

Abstract: A speaker diaphragm for a loudspeaker that has a composite material formed of two layers of ceramic material separated by a light metal substrate with the percentage ratio of the thickness of the ceramic layers to the light metal substrate being in the range of from about 10% to 45% for each ceramic layer and a corresponding 80% to 10% for the lightweight metal substrate.

Abstract: An electro-acoustic transducer comprises a metal single-piece blade diaphragm having a very good heat conductivity and mechanical characteristics, the metal blade of which is resiliently suspended and supports the acoustical current wire fixed at the center of mass thereof to the active metal surface of the transducer, so that the acoustical current wire communicates to the blade the heat which is produced because of the acoustical current and added to that generated in the blade because of the deformation of the resilient suspension.

Abstract: A double cone-type loudspeaker which comprises a subcone made of highly heat-conductive material, attached to the front of the main cone and to a voice coil bobbin made of highly heat-conductive material. Heat generated in the coil portion of the voice coil travels directly to the bobbin portion and subcone, and is released to the front of the speaker. Consequently, a double cone-type loudspeaker with high maximum input power and high heat radiating capability is achieved.