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WO/2000/003560A2 |
The recess is produced in a material layer (S) by creating at least a first (S1) and a second structure (S2) in various steps. Said layers define each other laterally and extend to the bottom of the recess. The first structure (S1) and t...
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WO/1999/065277A1 |
A method of manufacturing a transducer of the type having a diaphragm (11) with a predetermined tension. After the transducer has been manufactured with its basic structure the diaphragm is adjusted to have a predetermined tension, which...
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WO/1999/065272A1 |
A method of producing a speaker diaphragm used in a variety of acoustic devices and a speaker diaphragm formed by this method and a speaker using this; specifically a method of producing a speaker diaphragm capable of preventing the defo...
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WO/1999/060820A1 |
The invention concerns the embodiment of drivers for panel loudspeakers. Panel loudspeakers working according to the principle of bending waves are already known in prior art. Said loudspeakers generally consist of an acoustic panel (11)...
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WO/1999/059172A1 |
Thin electret layer with a layer thickness of less than 200 $g(m)m made of polymers containing fluorine. The mean chain length of the polymer chain contained in the layer produced by evaporation, sputtering, ablation, blowing or dispersi...
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WO/1999/057712A1 |
A method of applying a matching layer to a transducer includes placing the transducer on a fixture and covering the transducer with a stencil so that an opening in the stencil allows access to a metal-coated, piezoelectric surface of the...
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WO/1999/035204A1 |
A synthetic chloroprene rubber adhesive composition which comprises a carboxylated synthetic chloroprene rubber as a major component and further contains a chlorinated polypropylene and/or a chlorinated polypropylene derivative. The comp...
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WO/1999/028626A1 |
The invention concerns a vacuum pump element with liquid discharge rate and pressure comprising means (21, 22) for forced circulation of the liquid by an electrodynamic transducer mobile in translation (40) consisting of a piston (41) en...
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WO/1999/026261A1 |
The invention is embodied in an electrical device which includes at least a layer of a ferroelectric polyvinylidine fluoride polymer that has been processed to exhibit an electrostrictive strain of 4 % or more when an electric field grad...
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WO/1999/022882A1 |
A high quality electric-mechanical-acoustic transducer used mainly in mobile phones which is not damaged and degraded in performance by drop and impact. The transducer comprises at least one suspension (14) that supports a movable sectio...
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WO1999008474A3 |
The present invention consists of an improved distortion reduction cap and center pole speaker assembly and an improved method of coupling the cap to a speaker center pole. The cap includes an axial flare which is stretched over and pres...
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WO/1999/008474A2 |
The present invention consists of an improved distortion reduction cap and center pole speaker assembly and an improved method of coupling the cap to a speaker center pole. The cap includes an axial flare which is stretched over and pres...
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WO/1998/058520A1 |
A tweeter has its voice coil former and diaphragm integrally formed as a single unit. The magnet, pole piece and plate are encapsulated as a complete magnetic circuit in an injection moulded casing. A robust, inexpensive and easy to manu...
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WO1998041055A3 |
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WO/1998/053640A1 |
Flat knitted tinsel wires (2h) are sewn on a base cloth (B) of a conductive suspension (1) with a sewing thread (3) and the ends (2ha, 2hb) of the flat knitted tinsel wires extend outward from the conductive suspension (1). In this suspe...
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WO/1998/041055A2 |
The invention relates to a loudspeaker with a cone (2) and beading (4) connected thereto (2). Said beading consists of a sprayable plastic layer which is soft in a solid state. An open negative mould (16) is used in the method to produce...
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WO/1998/037388A1 |
Multiple embodiments of a solid state condenser transducer, and methods of manufacture, are disclosed. The transducer (10) comprises a semi-conductor substrate forming a frame (11) and having an opening, a thin-film cantilever structure ...
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WO1998019140A3 |
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WO1998010252A3 |
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WO/1998/019140A2 |
A silicon substrate (1) comprising an integrated doped area (5), a spacing layer (7) with an etched out cavity (8) and a membrane (2) placed on top on the spacing layer. The doped area and the membrane are electronically connected to ele...
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WO/1998/010252A2 |
A capacitive electroacoustic transducer (10) which includes an electrically insulative substrate (19), a layer of conductive material disposed (16) on a portion of a top surface of the substrate forming a first electrode of the transduce...
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WO/1997/039464A1 |
A method of making an electret microphone comprising juxtaposing a microphone membrane unit (30) and a microphone back plate (32), at least one of which includes a micro-machined electret layer (6) formed on a support structure, thereby ...
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WO1997009842A3 |
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WO/1997/016049A1 |
A sound transducer made of polyvinylidene fluoride (PVDF) and a method for making and integrating same into a card designed to generate acoustic signals for transmission over a telephone line, are disclosed. The method mainly comprises f...
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WO/1997/009842A2 |
Acoustic device (81) including a member (2) extending transversely of its thickness and capable of sustaining bending waves at least over an intendedly consequentially acoustically active area of the transverse extent of said member, the...
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WO/1997/003537A1 |
An improved surround design (70) for a loudspeaker assembly is disclosed wherein the outside edge of the surround is attached to the outer edge of the loudspeaker's frame (52) via a permanent (adhesive) or removable element (80). When re...
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WO/1995/026616A1 |
A method of making a woven spider (40) comprising selecting a thread (60) of the cloth (70) from which the spider (40) is to be woven, wrapping the selected thread (60) with an electrical conductor (66) and weaving the wrapped (66) threa...
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WO/1995/011579A1 |
A method of assembling an annular magnet (16) and a pole piece (14) in a chamber (22) of a cyclindrical core (12) at a predetermined height is disclosed. The magnet assembly tool (50) has a firstportion (52) with a diameter of approximat...
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WO/1995/001079A1 |
A folded dielectric film element functioning as an energy converter, consisting of a dielectric film (1, 2) bent into folds (L) and provided with electrodes (K). The electrodes (K) are so arranged in the folds (L), different electrodes b...
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WO/1994/016826A1 |
An ultrasonic transducer array (10), and a method for manufacturing it, having a plurality of transducer elements (12) aligned along an array axis (A) in an imaging plane. Each transducer element (12) includes a piezoelectric layer (22) ...
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WO/1993/023966A1 |
A loudspeaker cone assembly having a generally conical speaker cone body (12) and an annular flexible suspension rim (14). The suspension rim (14) may include an annular integral gasket (20), and is formed from a plastic foam which may b...
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WO/1993/020667A1 |
A transducer for use in an active noise cancellation system is particularly adapted for use as a motor vehicle exhaust muffler (12) by physically designing the transducer (32) to optimize magnetic flux with increases in temperature throu...
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WO/1993/018627A1 |
An electret microphone assembly, such as for a hearing aid comprises an electret microphone having a diaphragm and a charged plate, a substrate spaced from the charged plate, and a wire loop having first and second ends and a mid-portion...
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WO/1993/014608A1 |
A method of making a loudspeaker cone and surround assembly comprises clamping at least the outer marginal edge of a cone in a mould having a cavity defining a surround and injecting an elastomeric material into the cavity through an ann...
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WO/1993/003586A1 |
A voice coil actuator (50) includes a magnetic flux conductive material core (52, 52'), having a backplate (53) and a magnet (54), and an electrical current conductive coil (56, 56'). The core (52, 52') has a first surface (58, 58', 58''...
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WO/1992/002108A1 |
The invention relates to a method for preparing films or membranes for acoustic applications, having improved vibratory properties, characterized in that a dispersion in a liquid of at least one macropolymer, particularly of at least one...
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WO/1991/006329A1 |
Anti-infection catheter arrangement comprising a catheter which has a rigid or flexible catheter tube with a connection piece at the distal end, characterized by a filling and suction device which can be attached to the connection piece ...
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WO/1990/012658A1 |
The acoustic sensor comprises a piezoelectric film (12) mounted on a support (14) and connected electrically to electrodes (16, 18) themselves connected by electric conductors (20, 22) to a measurement device. The assembly composed of th...
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WO/1988/006832A1 |
This invention provides a condenser microphone simply constructed without using a separately provided push-up cylinder that has hitherto been used for pressing the vibration diaphragm to give a predetermined tension thereto. In this micr...
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WO/1986/003928A1 |
The method of making the diaphragm (28) includes pressing on the front face of a film (11) at spaced apart areas to deform it progressively into a series of closely-spaced generally U-shaped projections (P). A manufacturing device presse...
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WO/1986/001968A1 |
An electret sheet (25) is clamped on an apertured support (20) around the aperture (21) so that a sheet portion stretches all across the aperture. A tension-producing ring (60) is advanced against the sheet portion normal to its stretch ...
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WO/1984/001683A1 |
Diaphragm stretching apparatus to be placed in electrostatic loudspeakers, consisting of a foundation plate (e) and a hinged metal frame (d) on which a stator panel (c) is attached. In flatable rubber tubes (f) connected to each other in...
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WO/1984/000662A1 |
A transducer embodying the present invention is assembled on a discrete electrically conductive frame (100) that has been formed to provide both leads (120-140) and a backplate (110). An integrated circuit chip (200) is bonded to one of ...
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JP6807420B2 |
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JP6808676B2 |
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JP6796488B2 |
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JP2020535710A |
We propose an acoustic transducer (1) having a housing (5), at least one separator (9a), and a functional group (2). The functional group (2) has a diaphragm container (7) and at least one transducer element (3) that operates electroacou...
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JP6793208B2 |
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JPWO2019088145A1 |
A resin composition for an acoustic matching layer, which contains a binder containing a resin and metal particles and has a monodispersity of 40 to 80% calculated by the following formula (1) of the metal particles. A method for manufac...
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JP6787327B2 |
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