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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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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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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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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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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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JP2024047457A |
The present invention provides a glass diaphragm, a glass diaphragm with a vibrator, and a method for manufacturing a glass diaphragm that allows electronic components to be attached with a simple structure. [Solution] A glass diaphragm ...
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JP2024045798A |
An object of the present invention is to suppress a decrease in measurement accuracy, compared to the conventional method, even when thermal history is added during measurement. [Solution] For an ultrasonic sensor 102 in which a piezoele...
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JP7456943B2 |
A fingerprint identification module and a manufacturing method therefor, and an electronic apparatus. The fingerprint identification module comprises a substrate, a piezoelectric material layer, an auxiliary structure and a plurality of ...
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JP2024507847A |
Disclosed herein is an ultrasound transducer that is selectively insulated, thereby allowing the transducer to be exposed to a conductive fluid without creating a short between the electrodes of the transducer. Such transducers include a...
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JP7432298B2 |
To provide a transducer that can be manufactured without using a volatile adhesive and an organic solvent.A transducer 1 includes: a first electrode sheet 21 provided with a plurality of first through-holes 21a; a dielectric layer 23 of ...
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JP2024022237A |
[Problem] To provide a film for an acoustic member that has shapeability during molding and followability to a mold, does not cause delamination, and can be peeled from the mold release film without tearing when the mold release film is ...
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JP7418582B2 |
A method for producing a diaphragm for an ultrasonic sensor. In the method, a diaphragm body made of metal material is first provided. Next, an external surface region of the diaphragm body is degreased. The external surface region of th...
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JP7414254B2 |
An acoustic diaphragm 1 according to the present invention includes a center dome member, and a sub dome member. The center dome member includes a center dome 2 and an annular first plane part 2a that is disposed along the outer peripher...
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JP2024003792A |
An object of the present invention is to provide a resin composition for an acoustic member that has high damping properties when formed into a film or a cured product. A resin composition for an acoustic member includes a polyorganosilo...
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JP7411570B2 |
A process for producing a piezoelectric sensor includes the following steps: a step of providing a housing made of stainless steel; a step of producing a solution of a compound comprising a metal or metalloid element; a step of depositin...
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JP7408155B2 |
The present disclosure provides methods to integrate piezoelectric micromachined ultrasonic transducer (pMUT) arrays with an application-specific integrated circuit (ASIC) using thermocompression or eutectic/solder bonding. In an aspect,...
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JP7405074B2 |
To provide a molded product which is excellent in impact resistance, flexibility and bending resistance without impairing the characteristics (heat resistance, mechanical properties, etc.) of a polyaryletherketone, and has little appeara...
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JP2023181572A |
To provide: a laminated piezoelectric element in which a plurality of laminated piezoelectric elements are bundled and the peripheral surface of the plurality of the vertical piezoelectric elements is hardened with a mold resin and from ...
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JP7400086B2 |
Disclosed herein is a transparent ultrasonic sensor including a matching unit configured to perform optical impedance matching and formed of a transparent material, a piezoelectric layer positioned behind the matching unit and formed of ...
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JP5851238B6 |
Disclosed is an ultrasonic transducer that is provided with: a bottom electrode; an electric connection part which is connected to the bottom electrode from the bottom of the bottom electrode; a first insulating film which is formed so a...
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JP7395946B2 |
An ultrasonic probe includes: a piezoelectric element; and a backing material including a matrix resin and thermally conductive particles, arranged on one direction side with respect to the piezoelectric element, wherein a ratio of therm...
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JP2023172952A |
To provide a method for manufacturing a Capacitive Micro-machined Ultrasound Transducer (CMUT).A method for manufacturing a CMUT comprises steps of: forming a first silicon oxide layer 103 and a silicon nitride layer on a surface of a fi...
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JP7385652B2 |
A method of forming an ultrasound transducer device includes bonding a membrane to a substrate so as to form a sealed cavity between the membrane and the substrate. An exposed surface located within the sealed cavity includes a getter ma...
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