Abstract: A transducer comprising: at least one piezoelectric layer; a first patterned conductive layer that is patterned with a first opening; a second patterned conductive layer that is patterned with a second opening; wherein at least one piezoelectric layer is between the first and the second patterned conductive layers in a stack; and wherein a position of the first opening is staggered relative to a position of the second opening in the stack to mitigate an occurrence of crack propagation through the layers.

Abstract: A semiconductor package with design features, including an isolation structure for internal components and a flexible electrical connection, that minimizes errors due to environmental temperature, shock, and vibration effects. The semiconductor package may include a base having a first portion surrounded by a second portion. A connector assembly may be attached to the first portion. The connector assembly may extend through an opening in the base. A lid attached may be attached to, at least, the second portion. The attached lid may form a hermetically-sealed cavity defined by an upper surface of the first portion, the connector assembly, and an inner surface of the lid. An elastomer pad may be on the first portion and a sub-assembly may be on the elastomer pad. A flexible electrical connection may be formed between the connector assembly and the sub-assembly.

Abstract: The present application discloses a piezoelectric micro electrical mechanical system (MEMS) microphone chip and a piezoelectric MEMS microphone, and relates to the technical field of piezoelectric devices. The piezoelectric MEMS microphone chip includes at least one substrate frame and at least one plurality of sound receiving beams arranged on the substrate frame. Each of the sound receiving beams includes a connecting beam and a cantilever beam. The connecting beam and the cantilever beam are staggered on a circumference. One ends of the plurality of sound receiving beams that face a geometric center of the a circumference are fixedly connected to one another in a center defined by the substrate frame, and one end of the connecting beam that is away from the geometric center is fixedly connected to the substrate frame.

Abstract: Provided is an MEMS device, including: a substrate having back cavity passing thererthrough; a diaphragm connected to the substrate and covers the back cavity, the diaphragm includes first and second membranes, and accommodating space formed therebetween; a counter electrode; and support loop members arranged concentrically. Opposite ends of the support loop member are connected to the first and second membranes. The support loop members are arranged at intervals. Each support loop member has first sections concentrically arranged as a loop member at intervals. A first notch is formed between two adjacent first sections. In at least one support loop member, the first section has second sections concentrically arranged as a loop member at intervals. A second notch is formed between two adjacent second sections. By a larger first section, distance between adjacent first sections is larger, the technical problem that large number of slots required for counter electrode is solved.

Abstract: An electroacoustic transducer assembly includes an electrostatic diaphragm having a surface. The diaphragm includes a film of flexible insulating material and electrically conductive material within the film to achieve a uniform electrical resistivity over the surface.

Abstract: A speaker and like manufactured item manufacturing system, apparatus and method for aligning speaker components regardless of feature size to a common centering datum for placement. A speaker motor assembly may be aligned based on datum of a basket/washer subassembly, wherein remaining components are coupled, aligned and adhered according to the same datum, thus increasing concentricity, alignment, and orthogonality among components and installations. Speaker suspension components may likewise be coupled using the same datum. Specialized alignment mechanisms, such as a centering collet and a mechanical gripper, may be also be provided to align speaker components for placement and adhesion, and adhesives may be robotically controlled based on the aforementioned datum.

Abstract: Torque tool (200) configured for making up and breaking out joints (1a, 1b) in a riser (100), the tool (200) comprising: a tool body (3) and a tool head (4), the tool head (4) having a socket (4?) configured to receive a head (14) of a bolt (2) and apply a torque on the bolt (2), a torque sensor (20) operable to measure the torque applied on the bolt (2), and a pre-tension sensor (21) operable to measure a pre-tension in the longitudinal extension of the bolt (2) when the bolt (2) is received in the tool head (4). There is also provided a method for pre-tensioning bolted riser joints (1a, 1b) comprising a plurality of bolts (2), a method of managing a plurality of bolts (2) for riser joints (1a, 1b), a method of managing a plurality of bolts (2) for riser joints (1a, 1b), and a riser connector (101).

Abstract: A loudspeaker includes a loudspeaker body, a voice coil and a damper. The damper includes a main body, a wire and a first fixing sewing thread. The first fixing sewing thread includes a first sewing part including first to fourth wire winding portions and first to third yarn winding portions. The first and third wire winding portions extend from one side of the wire through upside of the wire to the other side of the wire while the second and fourth wire winding portions extend in the opposite direction The first to third yarn winding portions connect adjacent two wire winding portions and pass under one of the weft yarns, respectively.

Abstract: A MEMS microphone includes a substrate presenting a vibration area, a supporting area surrounding the vibration area and a peripheral area surrounding the supporting area, the substrate defining a cavity formed in the vibration area, a lower back plate being disposed over the substrate to cover the cavity and having a plurality of lower acoustic holes, a diaphragm being disposed over the lower back plate, the diaphragm being spaced apart from the lower back plate and configured to generate a displacement thereof in response to an applied acoustic pressure, an upper back plate being disposed over the diaphragm, the upper back plate being spaced apart from the diaphragm and having a plurality of upper acoustic holes, and an intermediate anchor being in contact with an upper surface of the lower back plate in the supporting area, the intermediate anchor being configured to support the diaphragm to space the diaphragm from the lower back plate, and to provide elasticity for the diaphragm.

Abstract: Certain aspects of the present disclosure provide an apparatus. The apparatus comprises a support structure comprising at least one microphone sensor, and a first material layer disposed adjacent to the support structure, wherein a first layer of air is formed between the first material layer and the support structure, the first layer of air being adjacent to the microphone sensor. In certain aspects, multiple material layers may be used, each of the material layers forming a layer of air. For instance, the apparatus may also include a second material layer disposed adjacent to the first material layer, wherein a second layer of air is formed between the first material layer and the second material layer.

Abstract: A high output and high reliability capacitive micromachined ultrasonic transducer (CMUT) is provided. The capacitive micromachined ultrasonic transducer has a concave portion on a surface of at least one insulating film. The surface faces an air gap.

Abstract: Acoustic resonator devices and filters are disclosed. An acoustic resonator device includes a substrate having a surface, wherein the surface comprises an etched cavity, and a single-crystal piezoelectric plate having parallel front and back surfaces, the back surface attached to the surface of the substrate except for a portion of the piezoelectric plate forming a diaphragm that spans the cavity. An interdigital transducer (IDT) is formed on the front surface of the single-crystal piezoelectric plate, wherein interleaved fingers of the IDT are aligned with the cavity such that the interleaved fingers are disposed on the diaphragm. The IDT is configured to excite a primary acoustic mode in the diaphragm in response to a radio frequency signal applied to the IDT. The substrate further includes an alignment pattern that is separate from resonator cavities to facilitate alignment of the piezoelectric plate and the interleaved fingers, the alignment pattern comprising a trench.

Abstract: A system, probe and method accurately measure the strain or extension of a fastener that occurs as a nut on the fastener is tightened and the fastener is put under load. The measurement technique is based on measurement of the time for an ultrasonic wave generated on one end of the fastener to travel a round trip through the fastener. As the fastener is tightened, the applied stress causes an associated increase in length. This length can be determined from a measurement of the increase in transit time. In various embodiments, the disclosed device and method uses laser ultrasonic testing (LUT), in which a pulsed laser generates the ultrasonic wave and a type of laser vibrometer detects the wave when it returns to the position of generation following a combination of longitudinal and shear wave reflections, which result in a higher magnitude and more easily and precisely measurable reflected signal peak than a signal peak associated with a signal directly reflected against the opposite end of the fastener.

Abstract: A bonded body includes a piezoelectric single crystal substrate; a supporting substrate composed of a polycrystalline ceramic material or a single crystal material; a bonding layer provided on the piezoelectric single crystal substrate and having a composition of Si(1-x)Ox (0.008?x?0.408); and an amorphous layer provided between the supporting substrate and bonding layer, the amorphous layer containing oxygen atoms and argon atoms. A concentration of the oxygen atoms at a central part of the amorphous layer is higher than a concentration of the oxygen atoms at a peripheral part of the amorphous layer.

Abstract: A sound vibration actuator includes: a casing having an internal space, a coil part coupled to the casing to receive power, a magnet part disposed in the casing, an elastic member whose one surface coupled to the magnet part, a substrate drawn from the internal space, and an external device-coupling part disposed on an outer peripheral surface of the casing to be coupled to an external device, wherein the casing has an underside casing part, a side periphery casing part, and a top casing part, the coil part is coupled to the top casing part, and the external device-coupling part includes a first coupling area coming into contact with a portion of the outer periphery of the side periphery casing part and second coupling areas extended from the first coupling area in a vertical direction to the first coupling area coupled to the external device.

Abstract: The invention provides a method for manufacturing a MEMS microphone, including the steps of: providing a base and preparing a first diaphragm on a first surface of the base; preparing a back plate on a surface of the first diaphragm opposite to the first surface; forming a first gap between the first diaphragm and the back plate; preparing a second diaphragm; forming a second gap between the second diaphragm and the back plate; preparing electrodes; forming a back cavity by etching the surface opposite to the first surface.

Abstract: An electroacoustic transducer includes an armature that is mounted for deflection between magnets where an elongated portion of the armature includes a protrusion on opposite sides thereof for limiting the deflection of the armature. The protrusions are arranged transversely with respect to the elongated portion of the armature. Among other advantages, deflection of the armature is limited to provide improved shock performance. In one example, the protrusions are located within a magnet zone of the electroacoustic transducer.

Abstract: A speaker and like manufactured item manufacturing system, apparatus and method for aligning speaker components regardless of feature size to a common centering datum for placement. A speaker motor assembly may be aligned based on datum of a basket/washer subassembly, wherein remaining components are coupled, aligned and adhered according to the same datum, thus increasing concentricity, alignment, and orthogonality among components and installations. Speaker suspension components may likewise be coupled using the same datum. Specialized alignment mechanisms, such as a centering collet and a mechanical gripper, may be also be provided to align speaker components for placement and adhesion, and adhesives may be robotically controlled based on the aforementioned datum.

Abstract: A kick pad includes a piezoelectric element (1) that converts a vibration generated by beating with a beater into an electric signal and outputs the electric signal, an impact-absorbing member (5) arranged between the piezoelectric element (1) and a surface (21a) to be beaten by the beater, and a sheet-like striking surface cover (21) that includes a front surface including the surface (21a) to be beaten, and that wraps the impact-absorbing member (5), together with the piezoelectric element (1), on a back surface side of the striking surface cover (21).

Abstract: A display device is disclosed. An object of the present disclosure is to match reproduction frequency bands of sounds output from a plurality of speakers. Another object of the present disclosure is to match magnitudes of sounds output from a plurality of speakers. According to at least one aspect of the present disclosure, the present disclosure can match reproduction frequency bands of sounds output from a plurality of speakers. According to at least one aspect of the present disclosure, the present disclosure can match magnitudes of sounds output from a plurality of speakers.

Abstract: A method for manufacturing an electrodynamic transducer from a membrane system module and a magnet system module is disclosed. The membrane system module comprises an annular first chassis unit made by injection-molding and a diaphragm fixed thereon. A coil is fixed on a coil seat of the diaphragm. The magnet system module comprises a pole piece, a magnet and a yoke that each have a central hole, and a second chassis unit that is made by injection-molding and that fills the central holes in the pole piece, the magnet and the yoke. It surrounds the yoke at least partially, so that the pole piece, the magnet and the yoke are held. In the transducer, the membrane system module and the magnet system module are plugged together, wherein an annular recess on the lower side of the first chassis unit is arranged on a circumferential shoulder of the second chassis unit. This defines a position of the coil relative to the pole piece, to the magnet and to the yoke of the magnet system module.

Abstract: A rotating electrical machine includes a rotor iron, a stator iron and conductor bars. An air gap separates the rotor iron from the stator iron. The stator iron has a slot and the conductor bars run in the slot. The conductor bars have a first profile in a first segment, the conductor bars have a second profile in a second segment and the first profile differs from the second profile. Also described is a method which is adapted for producing an electrical machine.

Abstract: This disclosure provides systems, methods, and apparatus associated with an electrostatically driven graphene speaker. In one aspect, a device includes a graphene membrane, a first frame on a first side of the graphene membrane, and a second frame on a second side of the graphene membrane. The first frame and the second frame both include substantially circular open regions that define a substantially circular portion of the graphene membrane. A first electrode is proximate the first side of the circular portion of the graphene membrane. A second electrode proximate the second side of the circular portion of the graphene membrane.

Abstract: A waterproof sound-transmitting membrane (10) includes a sound-transmitting region (13c) having a porous polytetrafluoroethylene (PTFE) membrane (11). The porous PTFE membrane (11) has a through-thickness air permeability of 2 cm3/cm2/s or more. Thus, it is possible to provide a waterproof sound-transmitting membrane that is suitable for reducing crackling noise while ensuring waterproofness required for at least daily use. The porous PTFE membrane (11) has a water entry pressure of 3 kPa or more, preferably 20 kPa or more and 50 kPa or less. The waterproof sound-transmitting membrane (10) may include an edge region (13p) having an adhesive layer (12).

Abstract: According to an embodiment, a microelectromechanical systems MEMS transducer includes a deflectable membrane attached to a support structure, an acoustic valve structure configured to cause the deflectable membrane to be acoustically transparent in a first mode and acoustically visible in a second mode, and an actuating mechanism coupled to the deflectable membrane. Other embodiments include corresponding systems and apparatus, each configured to perform various embodiment methods.

Abstract: A method of making a stretchable and flexible electronic device includes the steps of creating a computer aided design using a computer modeling software system of the electronic device; digitizing the computer aided design and importing the design into a computer memory of a sewing machine capable of performing embroidery; using the sewing machine and a conductive thread to embroider the design on to a fabric substrate to create the electronic device, whereby the electronic device comprises at least a portion of conductive threads; removing the fabric substrate from the electronic device using heat; coating the electronic device with a polymer.

Abstract: In a speaker damper, art sections are disposed on warp reference lines and warp reference lines. Straight sections are disposed so as to intersect intermediate reference lines at right angles. By adopting this configuration, wave parts can be adjusted so that they are less likely to expand/contract on the warp reference lines and the warp reference lines in comparison with related-art concentric circular wave parts. Further, the wave parts can be adjusted so that they are more likely to expand/contract on the intermediate reference lines. In this way, the speaker damper can perform uniform vibrating motions throughout the entire speaker damper with a simple configuration.

Abstract: Intravascular devices, systems, and methods are disclosed. In some embodiments, the intravascular devices include at least one pressure sensing component within a distal portion of the device. In that regard, one or more electrical, electronic, optical, and/or electro-optical pressure-sensing components is secured to an elongated substrate such that the pressure-sensing component is mounted perpendicular to a central longitudinal axis of the device. In some implementations, the elongated substrate has a cylindrical profile. Methods of making, assembling, and/or using such intravascular devices and associated systems are also provided.

Abstract: In accordance with an embodiment, a MEMS device includes a first membrane element, a second membrane element spaced apart from the first membrane element, a low pressure region between the first and second membrane elements, the low pressure region having a pressure less than an ambient pressure, and a counter electrode structure comprising a conductive layer, which is at least partially arranged in the low pressure region or extends in the low pressure region. The conductive layer includes a segmentation providing an electrical isolation between a first portion of the conductive layer and a second portion of the conductive layer.

Abstract: The application describes a MEMS transducer in which first and second conductive elements of a capacitor are both provided on the membrane. The membrane is shaped that the first and second conductive elements are displaced relative to each other when the flexible membrane deflects in response to a pressure differential across the membrane. For example the membrane may be corrugated.

Abstract: A MEMS sound transducer for at least one of generating and detecting sound waves in air in an audible wavelength spectrum includes a carrier substrate, a cavity defined in the carrier substrate, the cavity defining at least one opening, and a multilayered piezoelectric membrane structure spanning over the opening of the cavity and having an edge area connected with the carrier substrate so that with respect to the carrier substrate the membrane structure is capable of vibrating to at least one of generate and/or and detect sound energy, wherein the membrane structure has in cross-section at least in some areas a first piezo layer spaced from a second piezo layer. An interlayer is arranged in an area between the first and second piezo layers, the interlayer being made of at least one of silicon oxide, silicon nitride and polysilicon, the interlayer being configured so that sound energy can be reflected in the direction of at least one interface of the membrane structure adjacent to the air.

Abstract: A speaker is provided in the present disclosure. The speaker includes a shell, vibration system which received in the shell and a magnetic circuit system which disposed below the vibration system and used for driving the vibration system to vibrate for producing sound, the magnetic circuit system including a main magnet assembly and a fixing assembly, the main magnet assembly includes a first main magnet, a second main magnet homopolarly opposite to the first main magnet and spaced from the first main magnet, a magnetizer sandwiched between the first main magnet and the second main magnet, and positioning holes penetrating the first main magnet, the magnetizer and the second main magnet, the fixing assembly comprises fasteners penetrating through the positioning holes and a pressure plate matched with the fasteners to fix the main magnet assembly.

Abstract: The sound-transmitting structure (100) of the present invention includes a sound-transmitting membrane (1) that allows passage of sounds and prevents passage of foreign matters and a case (120) having a sound-transmitting opening (122). This sound-transmitting membrane (1) includes a supporting member (12) that is a nonwoven fabric containing an elastomer and a porous resin membrane (11) disposed on the supporting member (12) and containing polytetrafluoroethylene as a main component. The sound-transmitting membrane (1) covers the sound-transmitting opening (122) with the supporting member (12) welded to the case (120).

Abstract: Intravascular devices, systems, and methods are disclosed. In some embodiments, the intravascular devices include at least one pressure sensing component within a distal portion of the device. In that regard, one or more electrical, electronic, optical, and/or electro-optical pressure-sensing components is secured to an elongated substrate such that the pressure-sensing component is mounted perpendicular to a central longitudinal axis of the device. In some implementations, the elongated substrate has a cylindrical profile. Methods of making, assembling, and/or using such intravascular devices and associated systems are also provided.

Abstract: 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 as to cover the bottom electrode; a cavity which is formed on the first insulating film so as to overlap the bottom electrode when seen from above; a second insulating film which is formed so as to cover the cavity; and a top electrode which is formed on the second insulating film so as to overlap the cavity when seen from above. The electric connection part to the bottom electrode is positioned so as to not overlap the cavity when seen from above.

Abstract: The present invention provides a method for manufacturing a thermal bimorph diaphragm and a MEMS speaker with thermal bimorphs, wherein the method comprises the steps of: thermally oxidizing a substrate to obtain an insulating layer thereon and providing a metal layer on the insulating layer; providing a sacrificial layer on the metal layer; providing a first thermal bimorph layer on the sacrificial layer; providing a second thermal bimorph layer on the first thermal bimorph layer; providing a metal connecting layer at the positions on the metal layer where the sacrificial layer is not provided; forming corresponding back holes on the substrate and the insulating layer and releasing the sacrificial layer; forming the thermal bimorph diaphragm which is warped with the first thermal bimorph layer and the second thermal bimorph layer after the sacrificial layer is released.

Abstract: In accordance with an embodiment, a MEMS device includes a first membrane element, a second membrane element spaced apart from the first membrane element, a low pressure region between the first and second membrane elements, the low pressure region having a pressure less than an ambient pressure, and a counter electrode structure comprising a conductive layer, which is at least partially arranged in the low pressure region or extends in the low pressure region. The conductive layer includes a segmentation providing an electrical isolation between a first portion of the conductive layer and a second portion of the conductive layer.

Abstract: In an X-ray diffraction diagram of a cordierite sintered body of the present invention, the ratio of the total of the maximum peak intensities of components other than cordierite components to the peak top intensity of the (110) plane of cordierite is 0.0025 or less. Since having a significantly small amount of different phases other than the cordierite components, this cordierite sintered body has a high surface flatness when the surface thereof is mirror-polished.

Abstract: A method for manufacturing a microphone chip, includes steps of: providing a first underlay, and depositing insulating oxide layers at both sides; depositing the component layers on the insulating oxide layers respectively; depositing the tetraethyl orthosilicate oxide layers on the component layers; etching the tetraethyl orthosilicate oxide layers; patterning various deposition layers in the first underlay; providing the second underlay; depositing the oxide layers on the substrate; etching and patterning oxide layer; releasing the back plate; combining the first underlay and the second underlay by welding the tetraethyl orthosilicate oxide layer on the first underlay and the oxide layer on the second underlay under ambient temperature; etching the second underlay to form the back cavity; etching the first underlay to release the diaphragm and obtaining the microphone chip.

Abstract: A MEMS device includes a backplate electrode and a membrane disposed spaced apart from the backplate electrode. The membrane includes a displaceable portion and a fixed portion. The backplate electrode and the membrane are arranged such that an overlapping area of the fixed portion of the membrane with the backplate electrode is less than maximum overlapping.

Abstract: The present invention is directed to an apparatus for more efficient exergy and power usage in data centers. Denominated FRAME (standing for “Forced Recuperation, Aggregation & Movement of Exergy”), the apparatus is a power production and exergy management system (exergy being energy available to do useful work, as opposed to energy, which can be changed to a form, usually heat, rendering it unavailable). The apparatus integrates generally isothermal operation with phase-change and single-phase liquid cooling having variable operating temperatures and pressures, aided by a dynamically reconfigurable “thermal bus” comprising multi-fluid thermal fluid transport channels, virtual plumbing, and associated support devices. The apparatus minimizes exergy use through efficient operation and by recuperating and aggregating useful exergy that may then be dynamically repurposed to meet energy or power needs that would otherwise have to be met via external means.

Abstract: According to certain described aspects, multiple acoustic sensing elements are employed in a variety of beneficial ways to provide improved physiological monitoring, among other advantages. In various embodiments, sensing elements can be advantageously employed in a single sensor package, in multiple sensor packages, and at a variety of other strategic locations in the monitoring environment. According to other aspects, to compensate for skin elasticity and attachment variability, an acoustic sensor support is provided that includes one or more pressure equalization pathways. The pathways can provide an air-flow channel from the cavity defined by the sensing elements and frame to the ambient air pressure.

Abstract: An acoustic sensor apparatus mounted to a medium is disclosed. The acoustic sensor apparatus includes: a sensor unit processing an input acoustic signal; and a housing including a body unit having an accommodation groove in which the sensor unit is accommodated, a cap unit formed to close an opening of the accommodation groove, and a coupling unit formed to mechanically couple the body unit or the cap unit to a medium.

Abstract: In various embodiments, a method for manufacturing microphone structures is provided.

Abstract: Disclosed is a sliding arm for use with a docking station having a connector block with a plurality of plugs, the arm includes a block-side portion and a follower portion. The block-side portion can have a first end connected to the connector block. The follower portion can be connected to a second end of the block-side portion with a linear clutch. The linear clutch can include a bolt, a spring, and two sliding members. The bolt can pass through the block-side portion and the follower portion. A force on an end of the arm can cause the clutch to slip allowing the follower portion to move independently of the block-side portion. A sensor can detect a slippage of the linear clutch.

Abstract: An oscillation device (electro-acoustic transducer (100)) includes an oscillation element (110) that has a vibrating member (120) and a piezoelectric element (111) that is attached to one surface of the vibrating member (120). The oscillation device includes a sheet-shaped waterproof member (140) that is constituted by a waterproof material. The oscillation device includes a frame-shaped supporting member (130) that holds an outer peripheral portion of the vibrating member (120) and an outer peripheral portion of the waterproof member (140) so that the waterproof member (140) and the oscillation element (110) face each other. The oscillation device includes a connection member (150) that partially connects mutual opposed surfaces of the oscillation element (110) and the waterproof member (140).

Abstract: Method for producing a microelectronic device formed from a stack of supports (W) each provided with one or more electronic components (C) and comprising a conductive structure (170, 470) formed from a first blind conductive via (171b, 472) and a second blind conductive via (171a, 473) with a greater height, the first via and the second via being connected together.

Abstract: Embodiments related to pressure sensitive structures are described and depicted.

Abstract: An acoustic device includes a resilient surround having a proportionately unequal distribution of half roll and inverted half roll segments. Half roll segments may be sized and located to provide additional clearance for internal components. Regions of transitional concavity may be sized and located to provide increased stiffness in one or more dimensions. Transitions between inversions of concavity may be smooth and free of localized inflexions.

Abstract: An apparatus has a packaged microphone with a base and a lid that at least in part form an interior chamber containing a microphone die. The base has a bottom surface with an electrical interface and a base aperture. The apparatus also has a device housing having an internal surface, and a filter extending between the internal surface of the device housing, through an underlying substrate, and the bottom surface of the base.