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Patent Searching and Data


Matches 551 - 600 out of 6,518

Document Document Title
WO/2000/007409A1
A method of making an acoustic device in the form of a loudspeaker drive unit having a resonant panel-form member adapted to provide an acoustic output when excited with bending wave energy, comprising forming a resilient suspension for ...  
WO/2000/005001A1
An ultrasonic transducer and method of making the same is disclosed comprising applying a sacrificial material to a substrate (20), applying a polymer coating (24) over at least part of the sacrificial layer and the substrate (20), and r...  
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...  
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...  
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...  
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)...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
WO1998041055A3  
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...  
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...  
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 ...  
WO1998019140A3  
WO1998010252A3  
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...  
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...  
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 ...  
WO1997009842A3  
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...  
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...  
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...  
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...  
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...  
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...  
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) ...  
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...  
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...  
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...  
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...  
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''...  
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...  
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 ...  
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...  
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...  
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...  
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 ...  
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...  
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 ...  
JP2018153313A
【課題】簡易な製造プロセスで、より高精度 に超音波信号を検出可能な超音波振動子を提 供すること。【解決手段】超音波の送受信を 行う圧電素子11と、前記圧電素子11...  
JPWO2018061302A1
良好な振動特性を有する圧電発音部品を提供 する。金属板と、金属板上に形成された圧電 体とを有し、圧電体に電圧が印加されること により、屈曲振動する振動板と、底壁及...  
JP2018152740A
【課題】弾性率と内部損失の物性バランスの 良好なスピーカ用振動板を提供することを目 的とする。【解決手段】このスピーカ用振動 板は、振動板形状に成型された基材層(...  
JP2018152817A
【課題】音質および耐熱性に優れた振動板の 生産効率の向上を図る。【解決手段】振動板 用シート1は、離型シート10と、未硬化液 状シリコーン組成物から成る第1層20...  
JP2018149015A
【課題】スティッキングの発生をより低減で きる高アスペクト比構造物の製造方法、超音 波プローブの製造方法および高アスペクト比 構造物ならびにX線撮像装置を提供する...  

Matches 551 - 600 out of 6,518