Abstract: Microphones including a housing defining a cavity, a plurality of conductors positioned within the cavity, at least one dielectric bar positioned within the cavity, and a transducer diaphragm. The conductors are structured to move in response to pressure changes while the housing remains fixed. A first conductor generates first electrical signals responsive to the pressure changes resulting from changes in an atmospheric pressure. A second conductor generates second electrical signals responsive to the pressure changes resulting from acoustic activity. The dielectric bar is fixed with respect to the cavity and remains fixed under the pressure changes. The dielectric bar is adjacent to at least one of the conductors. In response to an applied pressure that is an atmospheric pressure and/or an acoustic pressure, the transducer diaphragm exerts a force on the housing and displaces at least a portion of conductors with respect to the dielectric bar.

Abstract: A MEMS microphone includes a substrate having a cavity defining a vibration area and a peripheral area surrounding the vibration area, a back plate disposed over the substrate and having a plurality of acoustic holes, a diaphragm disposed between the substrate and the back plate to cover the cavity, the diaphragm defining an air gap together with the back plate, and the diaphragm sensing an acoustic pressure to generate a displacement, a plurality of anchors arranged along a circumference of the diaphragm, and spaced apart from each other to define a plurality of slits configured to serve as first vent channels for communicating the air gap with the cavity, and at least one vent hole penetrating through the diaphragm, and serving as a second vent channel for communicating the air gap with the cavity.

Abstract: An acoustic apparatus includes a back plate, a diaphragm, and at least one pillar. The diaphragm and the back plate are disposed in spaced relation to each other. At least one pillar is configured to at least temporarily connect the back plate and the diaphragm across the distance. The diaphragm stiffness is increased as compared to a diaphragm stiffness in absence of the pillar. The at least one pillar provides a clamped boundary condition when the diaphragm is electrically biased and the clamped boundary is provided at locations where the diaphragm is supported by the at least one pillar.

Abstract: A MEMS microphone includes a substrate having a cavity, a back plate being disposed over the substrate and having a plurality of acoustic holes, a diaphragm disposed between the substrate and the back plate, the diaphragm being spaced apart from the substrate and the back plate, covering the cavity to form an air gap between the back plate, and being configured to generate a displacement in response to an acoustic pressure and a plurality of anchors extending from an end portion of the diaphragm to be integrally formed with the diaphragm, the anchors being arranged along a circumference of the diaphragm to be spaced apart from each other, and having lower surfaces making contact with an upper surface of the substrate to support the diaphragm. Thus, the MEMS microphone may have improved rigidity and flexibility.

Abstract: A MEMS microphone includes a substrate having a cylindrical cavity, a back plate disposed over the substrate and having a plurality of acoustic holes defined therethrough, a diaphragm disposed between the substrate and the back plate, the diaphragm spaced apart from the substrate and the back plate, covering the cavity to form an air gap between the back plate, and being configured to generate a displacement with responding to an acoustic pressure and an anchor extending from an end portion of the diaphragm and extending along a circumference of the diaphragm, and the anchor including a lower surface in contact with an upper surface of the substrate to support the diaphragm, and a connecting portion, which is connected to the diaphragm, presenting a stepped cross section. Thus, the MEMS microphone may have improved flexibility and improved total harmonic distortion.

Abstract: A microelectromechanical system includes a housing with an access opening and a sound transducer with a membrane and a backplate, wherein the sound transducer is coupled to the access opening. The microelectromechanical system includes a filter arranged between the access opening and the sound transducer and includes a filter material and a pretension element, the pretension element being mechanically connected to the filter material, and wherein the pretension element produces stress in the filter material in order to provide a bending deformation of the filter in a direction away from the backplate.

Abstract: An electronic apparatus includes a housing provided with an opening, a Micro Electro Mechanical System (MEMS) microphone disposed at a position directly under the opening and configured to collect sound through the opening, a light blocking member disposed at a position corresponding to a sound collection unit of the MEMS microphone between the opening and the MEMS microphone to prevent light from entering the MEMS microphone through the opening, and a waterproof member disposed in contact with the light blocking member and configured to close the opening to prevent water from entering the housing through the opening.

Abstract: The invention includes a basic approach to simulate the workings of a ribbon microphone based on measurements at an array of more robust small pressure microphones. Embodiments of the invention take an array of microphone elements, either very small microphones that are placed on either side of a printed circuit board or some other device to understand the sound pressure differences from front to back and use those sound pressure differences to emulate the motion of a ribbon if a ribbon were co-located with the array of microphones. The microphone array detects differential pressure, either by a set of elements that that have figure of eight polar patterns, or by having separate elements front and back.

Abstract: A multi-diaphragm planar magnetic electro-acoustic transducer is provided, having a plurality of diaphragms arranged in one or more diaphragm modules. Each diaphragm comprises a substrate and at least one electrically conductive circuit on at least one surface of the substrate. Each diaphragm module comprises at least one diaphragm, each held taut by a frame. Each diaphragm module is disposed to one side or the other of at least one planar magnetic array, the diaphragm module being parallel to and aligned with the planar magnetic array to form the multi-diaphragm planar magnetic transducer. The planar magnets many have a vertical arrangement, a sideways arrangement, a staggered arrangement, and may comprise stators and/or a low reluctance backing plate or channel piece. The planar magnet arrays can be linear or circular.

Abstract: The present disclosure provides a vibration diaphragm. The vibration diaphragm includes a vibration part; a suspension extending from and surrounding the vibration part; and a pattern module part formed on the vibration part. The pattern module part includes a first protrusion, and a second protrusion bounded by the first protrusion. The first protrusion has a pair of first sides parallel to a long axis of the vibration diaphragm and a pair of second sides parallel to a short axis for connecting ends of the first sides. One of the second sides connects with the ends of the first sides via two arcs. By virtue of the configuration of the pattern module part, the solution described by the present embodiment increases the surface area of the vibration part, and widens the bandwidth of the vibration diaphragm, and further improves the acoustic performance of the diaphragm.

Abstract: A capacitor type tactile sensor and a method of manufacturing the capacitor type tactile sensor are provided. To elaborate, the device includes a first electrode, an active layer formed on a top surface of the first electrode, and a second electrode formed on a top surface of the active layer. The active layer is made of ionic elastomer, and a concentration of effective ions within the active layer is adjusted by an external pressure.

Abstract: A stereo microphone includes an omnidirectional microphone unit, a bidirectional side-channel microphone unit arranged to be perpendicular to a direction of a sound collecting axis outside the omnidirectional microphone unit, a right-channel microphone unit arranged to form a predetermined angle with respect to the side-channel microphone unit on a plane including the sound collecting axis outside the omnidirectional microphone unit, and a left-channel microphone unit arranged to form a predetermined angle with respect to the side-channel microphone unit and the right-channel microphone unit on the plane including the sound collecting axis outside the omnidirectional microphone unit.

Abstract: A tunable ribbon microphone having magnets positioned within a small gap in between pieces of opposite poles. A conductive ribbon placed in an air gap between the magnets by an adjustable ribbon holder structure. The adjustable ribbon holder structure includes two ribbon holders and a ribbon tension control. The ribbon holder can be fixed from one side by sliding on one side or sliding on both sides. The ribbon tension control adjusts the tension of the elastic ribbon. By turning the ribbon tension control, turning motion translate to linear motion and change the distance between the ribbon holders and alter the tension of the ribbon. Changing the ribbon tension also possible by different ribbon tension control mechanism by rolled or folded the ribbon in one side or both side of the microphone. The tunable ribbon microphone may have more than one ribbon, adjustable ribbon holder structure and ribbon tension control.

Abstract: A method comprises mounting a grounding clip to a planar flexible printed circuit transmission line; clamping the grounding clip to an inner wall of a chassis of an electronic device; and operating a laser beam to weld the grounding clip to the chassis to route the flexible printed circuit transmission line along the inner wall. Welding the grounding clip to the chassis causes the grounding clip to remain in contact with the planar flexible printed circuit transmission line to ground the planar flexible printed circuit transmission line to the chassis.

Abstract: A sound transducer includes a substrate with a cavity with extending from a first surface of the substrate, a body at least partially covering the cavity and being connected to the substrate by at least one resilient hinge, a first set of comb fingers mounted to the substrate, and a second set of comb fingers mounted to the body. The first set of comb fingers and the second set of comb fingers are interdigitated and configured to create an electrostatic force driving the body in a direction perpendicular to the first surface of the substrate. The body and the at least one resilient hinge are configured for a resonant or a near-resonant excitation by the electrostatic force.

Abstract: A ribbon microphone includes a ribbon microphone unit; an acoustic box for mounting a rear acoustic terminal of the ribbon microphone unit; a detective microphone mounted in the acoustic box, the detective microphone detecting sound waves identical to sound waves guided to the rear acoustic terminal of the ribbon microphone unit; a speaker comprising a diaphragm, the speaker being assembled in the acoustic box and varying the pressure in the acoustic box in response to the driven diaphragm; and a drive unit for driving the speaker so as to cancel a variation in pressure in the acoustic box in response to signals detected by the detective microphone, the variation being caused by sound waves guided to the rear acoustic terminal. This configuration extracts an omnidirectional component without an acoustic tube to achieve a small high-sensitivity unidirectional ribbon microphone and a unidirectional converter for the ribbon microphone.

Abstract: A condenser microphone includes a condenser microphone unit having a diaphragm and a fixed electrode disposed opposite to the diaphragm; a field effect transistor serving as an impedance converter; and a transistor to generate operational power for the field effect transistor; wherein the field effect transistor comprises a gate, a source and a drain, the gate is connected to the fixed electrode or the diaphragm, the diaphragm disposed opposite to the fixed electrode connected to the gate or the fixed electrode facing the diaphragm connected to the gate is grounded; the source is connected to a base of the transistor; the drain is connected to an emitter of the transistor; and a resistor establishing a base potential of the transistor is disposed between the base of the transistor and a ground.

Abstract: Disclosed herein is a microphone including: a membrane; a fixed electrode part positioned at the outside of the membrane; and an elastic support part connecting the membrane and the fixed electrode part to each other so as to enable displacement of the membrane, wherein one surface of the membrane and one surface of the fixed electrode part facing each other are formed with conductive parts, respectively.

Abstract: A multi-layer armature for a moving armature receiver. The armature includes a first armature layer and a displacement region. The first armature layer includes a first surface and a second armature layer having a second surface positioned adjacent to the first surface. The displacement region provides relative displacement between the armature layers.

Abstract: A receiver, the receiver includes a coil, a top assembly, a bottom assembly, and a flat planar armature. The flat planar armature includes an outer ring-like portion that forms a first opening. The flat planar armature further includes a central portion that extends from the outer ring-like portion into the opening. An end of the central portion is free to move in the presence of magnetic flux. The flat planar armature has a first end portion and a second end portion. The first end portion couples to the top assembly and the bottom assembly. The top assembly and the bottom assembly form a second opening that exposes the second end portion.

Abstract: An acoustic apparatus includes a first acoustic element, a second acoustic element, and a registration portion. The first acoustic element and the second acoustic element are elements such as a coil, a reed, or a yoke. The registration portion is configured to register the first acoustic element with respect to the second acoustic element such that an exact and relative alignment and positioning between the first acoustic element and second acoustic element is provided and ensured.

Abstract: A ribbon microphone circuit includes a ribbon microphone unit; a step-up transformer; buffer amplifier circuits connected to a secondary winding of the step-up transformer; an external power supply circuit as a power source for driving the buffer amplifier circuits; and a switch circuit including photo-relays having lights that are turned on while the external power source is being supplied and having contacts operating depending on states of the respective lights, wherein signals output from the ribbon microphone unit are sent through the buffer amplifier circuits while the external power source is being supplied, and sent without passing through the buffer amplifier circuits while the external power source is being not supplied.

Abstract: A novel ribbon microphone incorporates rounded-edge magnet motor assembly, a backwave chamber, and a phantom-powered JFET circuit. In one embodiment of the invention, one or more novel rounded-edge magnets may be placed close to a ribbon of the ribbon microphone, wherein the one or more novel rounded-edge magnets reduce or minimize reflected sound wave interferences with the vibration of the ribbon during an operation of the ribbon microphone. Furthermore, in one embodiment of the invention, a novel backwave chamber operatively connected to a backside of the ribbon can minimize acoustic pressure, anomalies in frequency responses, and undesirable phase cancellation and doubling effects. Moreover, in one embodiment of the invention, a novel phantom-powered JFET preamplifier gain circuit can minimize undesirable sound distortions and reduce the cost of producing a conventional preamplifier gain circuit.

Abstract: A ribbon microphone includes a ribbon microphone unit; an acoustic box for mounting a rear acoustic terminal of the ribbon microphone unit; a detective microphone mounted in the acoustic box, the detective microphone detecting sound waves identical to sound waves guided to the rear acoustic terminal of the ribbon microphone unit; a speaker comprising a diaphragm, the speaker being assembled in the acoustic box and varying the pressure in the acoustic box in response to the driven diaphragm; and a drive unit for driving the speaker so as to cancel a variation in pressure in the acoustic box in response to signals detected by the detective microphone, the variation being caused by sound waves guided to the rear acoustic terminal. This configuration extracts an omnidirectional component without an acoustic tube to achieve a small high-sensitivity unidirectional ribbon microphone and a unidirectional converter for the ribbon microphone.

Abstract: The present invention relates to a voice film having a multi-layered structure for a flat panel speaker, including a PCB configured to have permanent magnets disposed on the left and right sides thereof, to have a voice coil patterned therein and disposed between the permanent magnets on the left and right sides so that the voice coil is vibrated up and down, and to have a PCB structure of a stack structure and coil patterns formed on surfaces of the highest PCB, one or more intermediate layer PCBs, and the lowest PCB in the form of a consecutive spiral track, wherein the start points of coil patterns of adjacent PCBs formed in layers, from among the coil patterns, are shorted through a via hole and are bonded to the respective end points of the coil patterns of the adjacent PCBs at the end points of the coil patterns.

Abstract: An acoustic apparatus includes a first acoustic element, a second acoustic element, and a registration portion. The first acoustic element and the second acoustic element are elements such as a coil, a reed, or a yoke. The registration portion is configured to register the first acoustic element with respect to the second acoustic element such that an exact and relative alignment and positioning between the first acoustic element and second acoustic element is provided and ensured.

Abstract: A micromachined microphone or speaker embedded within, or positioned on top of, a substrate suitable for carrying microelectronic chips and components. The acoustic element converts sound energy into electrical energy which is then amplified by electronic components positioned on the surface of the substrate. Alternatively, the acoustic element may be driven by electronics to produce sound. The substrate can be used in standard microelectronic packaging applications.

Abstract: A ribbon transducer comprising a ribbon made of conductive material, two rigid supports where the ends of the ribbon are fixed, and a tensioning and damping system provided at least at one end of the conductive ribbon to tension the ribbon and damp its movements. The tensioning and damping system comprises a leaf spring comprising a first end section to which said ribbon is fixed and a second end section fixed to said rigid support, in such a way to exert a tensile force in the tensioning direction of the ribbon.

Abstract: Actuator apparatus comprising at least one moving elements, each comprising comb drive apparatus including at least first and second comb elements at least one of which is free to be in motion in a medium, and a controller controlling the motion responsive to an input signal representing a desired sound.

Abstract: A battery compartment for a condenser microphone includes a battery space configured to hold a battery; a battery outlet open to a portion of a peripheral wall of the battery space and allowing removal of the battery in the battery space; a lid covering the battery outlet; and a ribbon having one end portion fixed to an internal wall of the battery space and the other end portion disposed to be pulled out from the battery outlet and wrapping around an external periphery of the battery. The ribbon is conductive and the fixed end portion is grounded.

Abstract: To provide electromagnetic damping without a special output connector for protecting a diaphragm of metallic ribbon foil of a ribbon microphone against shocks. A ribbon microphone operable with a phantom power supply comprises: an acoustic-electric converter 1 including a pair of permanent magnets and a diaphragm of metallic ribbon foil; and a step-up transformer 110 coupled with the diaphragm on a primary winding 111 side and having, on a secondary winding 112 side, an output connector 120 removably connected to a phantom power supply, the step-up transformer 110 increasing a voltage generated by the diaphragm to a predetermined voltage, the voltage then being output to the phantom power supply side through the output connector 120, wherein a switch 141 is connected across the secondary winding 112, the switch 141 being normally closed and being opened by a power supplied from the phantom power supply.

Abstract: A ribbon microphone unit includes a pair of magnets generating a magnetic field, a ribbon diaphragm disposed in the magnetic field generated by the magnets, and a circuit substrate provided with signal paths that conduct electrical signals generated by vibration of the ribbon diaphragm to output terminals. The signal paths are symmetrical about the longitudinal central axis of the ribbon diaphragm.

Abstract: An acoustic sensor includes a semiconductor substrate with a back chamber, a conductive diaphragm arranged on an upper side of the semiconductor substrate, an insulating fixed film fixed on an upper surface of the semiconductor substrate covering the conductive diaphragm with a gap, a conductive fixed electrode film arranged on the insulating fixed film facing the diaphragm, an extraction wiring extracted from the conductive fixed electrode film, and an electrode pad to which the extraction wiring is connected. The acoustic sensor converts an acoustic vibration to change electrostatic capacitance between the conductive diaphragm and the conductive fixed electrode film. A plurality of acoustic perforations are opened in a back plate including the insulating fixed film and the conductive fixed electrode film. An opening rate of the plurality of acoustic perforations is smaller in the extraction wiring and a region in the vicinity thereof than in other regions.

Abstract: An acoustic apparatus includes a first acoustic element, a second acoustic element, and a registration portion. The first acoustic element and the second acoustic element are elements such as a coil, a reed, or a yoke. The registration portion is configured to register the first acoustic element with respect to the second acoustic element such that an exact and relative alignment and positioning between the first acoustic element and second acoustic element is provided and ensured.

Abstract: A microphone unit (1) is provided with: a case (11), in which a diagram (contained in a MEMS chip (12)) that vibrates due to sound pressure, an internal space (111) that houses the diagram, and an opening (112) that links the internal space (111) to the outside and serves as a tone hole, are disposed; and a film (14) that is formed by a material that is not permeable to air, and that is joined to the base (11) in such a manner as to cover the opening (112). An internal pressure regulation section (141) is disposed in the film (14).

Abstract: A ribbon microphone includes two magnets spaced in parallel and generating a magnetic field therebetween, two ribbon diaphragms arranged in parallel at a predetermined distance in the magnetic field, and a step-up transformer raising the voltages of electric signals generated in response to vibrations of the ribbon diaphragms in the magnetic field and outputs the raised electric signals. The step-up transformer includes two primary windings and two secondary windings corresponding to the two ribbon diaphragms, one of the two ribbon diaphragms and one of the two primary windings of the step-up transformer are connected in parallel whereas the others are connected in parallel, and the two secondary windings of the step-up transformer are connected in series so as to have opposite polarities. The ribbon microphone exhibits enhanced shielding effect without shielding a step-up transformer and does not generate noise caused by electromagnetic induction.

Abstract: An electromagnetic converter includes a magnetic circuit having permanent magnets, a lower frame for fixing magnetic pole faces of these permanent magnets thereto, an upper frame having an opening formed therein on a side of the other magnetic pole faces of the permanent magnets and plates fixed to the other magnetic pole faces, and a diaphragm having a voice coil pattern arranged on side portions thereof in a direction of the length thereof and on a top portion thereof in a direction of the width thereof. Protruding portions join between these side portions. The periphery of the top portion is joined to the periphery of the opening of the upper frame via an upper gasket. A flange at the edges of the four side portions is joined to an inner surface of the upper frame, i.e., an inner portion of the magnetic circuit via a lower gasket.

Abstract: There is provided a capacitive electro-acoustic transducer comprising an active diaphragm (20) and a first and a second diaphragm carrier (60). The active diaphragm (20) is accommodated between the first and second diaphragm carriers (60). The first and second diaphragm carriers (60) each have a respective flat electrode (30). The diaphragm carrier and the electrode are connected together in such a way that the diaphragm carrier projects beyond the electrode by a predetermined amount.

Abstract: A method of manufacturing a capacitive transducer by applying a first etching mask on a layer. Applying a second etching mask to define the movable set of fingers, the fixed set of fingers, a body, and springs, and the body is connected to the movable set of fingers and the springs while the movable set of fingers are interdigitated with the fixed set of fingers. Etching the layer and the first etching mask using the second etching mask and removing the second etching mask. Etching the layer such that one of the movable set of fingers and the fixed set of fingers is shorter than the other of the movable set of fingers and the fixed set of fingers. Releasing the body, the springs, and the movable set of fingers using etching, such that, upon applying a force to the body, the body moves parallel to the substrate.

Abstract: A silicon based capacitive microphone includes a first printed circuit board, a second printed circuit board far away from the first printed circuit board, a transducer electrically mounted on the first printed circuit board, a controlling chip electrically mounted on the second printed circuit board, a connecting member located between the first and second printed circuit boards.

Abstract: Provided is an acoustic sensor capable of improving an S/N ratio of a sensor without preventing reduction in size of the sensor. A back chamber 45 is vertically opened in a silicon substrate 42. A thin film-like diaphragm 43 to serve as a movable electrode plate is formed on the top surface of the substrate 42 so as to cover the back chamber 45. The back plate 48 is fixed to the top surface of the substrate 42 so as to cover the diaphragm 43, and a fixed electrode plate 49 is provided on the under surface of the back plate 48. Further, the diaphragm 43 is divided into a plurality of areas by the slit 47, and the respective plurally divided diaphragms 43a, 43b and the fixed electrode plate 49 constitute a plurality of parallelly connected capacitors (acoustic sensing sections 60a, 60b).

Abstract: There is provided: first to fourth magnetic pole yokes 13-16 magnetized by the magnets 11, 12 having both poles on these opposite faces to establish a magnetic pole; and a vibrating membrane 17 disposed between the magnets 11, 12 and electromagnetically coupled to the yokes 13-16 by energizing a meandering coil pattern 17b thereon to vibrate in a predetermined direction. The yokes 13-16 include: abutting sections 13a-16a to be magnetized with abutting against the magnets 11, 12, and magnetic pole sections 13b-16b establishing the magnetic pole in a band shape. The sections 13b-16b each are disposed on the upper and lower sides of the vibrating membrane 17, and disposed with a gap (sound emitting hole 19) such that the magnetic poles different in magnetic polarity are positioned alternately in the lateral direction of the membrane 17 to form magnetic pole faces on the upper and lower sides thereof.

Abstract: A ribbon microphone unit includes a permanent magnet that forms a magnetic field and a ribbon diaphragm that is disposed in the magnetic field and vibrates upon receiving a sound wave. An elastic layer made of synthetic resin is formed at least at a portion of the ribbon diaphragm, the portion vibrating upon receiving the sound wave. Preferably, the ribbon diaphragm is formed into triangular waves with the portion vibrating upon receiving sound waves being alternately folded along lines in a width direction across the entire length. The elastic layer may be formed on one or both surfaces of the ribbon diaphragm and may be provided only at both side ends of the ribbon diaphragm.

Abstract: To obtain a ribbon microphone unit, which makes the tension of a diaphragm adjustable by configuring a ribbon diaphragm assembly that is detachable to a magnetic-circuit assembly including a magnet, and which further allows a user side to carry out the maintenance by replacing the ribbon diaphragm assembly; a ribbon microphone unit comprises: a magnetic-circuit assembly including a magnet; and a ribbon diaphragm, wherein the ribbon diaphragm, together with a substrate having a circuit pattern formed on both ends thereof, a metal fitting for crimping an end portion of the ribbon diaphragm to the circuit pattern, and a screw for crimping the metal fitting toward the substrate, constitute a diaphragm assembly, and wherein the diaphragm assembly is secured to the magnetic-circuit assembly.

Abstract: A ribbon microphone unit includes: an electrode lead portion for conducting an electric signal which a ribbon diaphragm generates cooperating with a magnet; a tightening member for securing the ribbon diaphragm; and a screw for crimping the tightening member, wherein the tightening member is crimped via the ribbon diaphragm and the electrode lead portion by the screw, and wherein the ribbon diaphragm includes a portion sandwiched by the tightening member, and the portion is formed in an irregular shape in the thickness direction.

Abstract: A ribbon transducer comprising a ribbon made of conductive material, two rigid supports where the ends of the ribbon are fixed, and a tensioning and damping system provided at least at one end of the conductive ribbon to tension the ribbon and damp its movements. The tensioning and damping system comprises a leaf spring comprising a first end section to which said ribbon is fixed and a second end section fixed to said rigid support, in such a way to exert a tensile force in the tensioning direction of the ribbon.

Abstract: The present invention provides an electret condenser microphone including a diaphragm, a frame adapted to affix the diaphragm to, and a backplate positionable inside the frame and opposite the diaphragm with a space reserved therebetween.

Abstract: To provide electromagnetic damping without a special output connector for protecting a diaphragm of metallic ribbon foil of a ribbon microphone against shocks. A ribbon microphone operable with a phantom power supply comprises: an acoustic-electric converter 1 including a pair of permanent magnets and a diaphragm of metallic ribbon foil; and a step-up transformer 110 coupled with the diaphragm on a primary winding 111 side and having, on a secondary winding 112 side, an output connector 120 removably connected to a phantom power supply, the step-up transformer 110 increasing a voltage generated by the diaphragm to a predetermined voltage, the voltage then being output to the phantom power supply side through the output connector 120, wherein a switch 141 is connected across the secondary winding 112, the switch 141 being normally closed and being opened by a power supplied from the phantom power supply.

Abstract: A microphone unit includes a substrate. The substrate includes a first face formed with a first recess, a second face opposite to the first face, and a through hole communicating the second face to a bottom part of the first recess. A diaphragm unit includes a diaphragm, and at least a part of which is disposed in the first recess so that the diaphragm opposes the through hole.

Abstract: A geometrically shaped acoustic polymer ribbon with shape memory, high conductivity, high toughness. A method of manufacturing the ribbon comprises: forming a sized, elongated, coated or coatable polymeric substrate film between a pair of opposed, geometrically shaped dies, pinching the dies about the polymeric substrate film to form an assembly, heating the dies and the pinched die and polymeric film assembly to a temperature of at about 300 degrees F. for a period of about 15 minutes to set the elongated film into a predetermined geometric pattern, cooling the assembly, removing the film from the dies; and if not already coated, coating the geometrically formed, set, elongated film with a conductive coating.