Abstract: A recording apparatus includes a recording head, a medium support portion which supports, at a support surface, a recording medium in a recording region by the recording head, and a base portion to which the medium support portion is attached in a state of being movable in a direction toward the support surface while being biased in a direction intersecting the support surface.

Abstract: A first diaphragm FD and a second diaphragm RD are respectively arranged across a fixed electrode BP at both sides to constitute the variable directivity condenser microphone. A microphone body 1 includes a vacuum tube Q1 for impedance converting an audio signal obtained at the fixed electrode, and a connector 2 provided with a hot side connector terminal and a cold side connector terminal through which the audio signal that is impedance converted by the vacuum tube is outputted in parallel. A means for supplying a polarization voltage applied to the second diaphragm RD from an external power supply circuit 3 is arranged such that the hot side connector terminal and the cold side connector terminal are used as a forward conductor and a ground connector terminal for the microphone body arranged at the connector is used as a return conductor.

Abstract: A membrane pressure-sensitive switch includes a circuit board provided with an electrode pattern detecting electrical conductivity, a membrane having a conductive surface, and a spacer interposed between the membrane and the circuit board. The electrode pattern is surrounded by a ground pattern on the front surface of the circuit board. The ground pattern on the front surface is connected to another ground pattern on the rear surface of the circuit board. The spacer is composed of a conductive material. The conductive surface of the membrane, the ground pattern on the front surface of the circuit board, and the spacer are electrically conducted. The electrode pattern is disposed between the conductive surface of the membrane and the other ground pattern on the rear surface of the circuit board.

Abstract: A first diaphragm FD and a second diaphragm RD are respectively arranged across a fixed electrode BP at both sides to constitute the variable directivity condenser microphone. A microphone body 1 includes a vacuum tube Q1 for impedance converting an audio signal obtained at the fixed electrode, and a connector 2 provided with a hot side connector terminal and a cold side connector terminal through which the audio signal that is impedance converted by the vacuum tube is outputted in parallel. A means for supplying a polarization voltage applied to the second diaphragm RD from an external power supply circuit 3 is arranged such that the hot side connector terminal and the cold side connector terminal are used as a forward conductor and a ground connector terminal for the microphone body arranged at the connector is used as a return conductor.

Abstract: A capacitor microphone includes: a capacitor microphone unit; a microphone casing that incorporates the microphone unit and is provided with an opening communicating with a rear acoustic terminal of the microphone unit; and a shield plate that covers the opening in the microphone casing from inside of the microphone casing. The shield plate has a projection extending towards axial direction of the microphone casing at least on microphone unit side in the axial direction of the microphone casing. The projection is folded to be pressed firmly against the outer surface of a casing of the capacitor microphone unit. The shield plate is rolled into a cylindrical shape and is in contact with the inner surface of the microphone casing with pressure.

Abstract: Diaphragms of a plurality of capacitor microphone units are arranged in the same plane and the capacitor microphone units are connected in series to make an output from an impedance converter connected to one capacitor microphone unit drives a ground side of another capacitor microphone unit connected to the impedance converter.

Abstract: A stereo capacitor microphone unit includes: two unidirectional microphone units integrally formed with respective fixed electrodes of the unidirectional microphone units facing each other; and an insulating spacer that is interposed between the fixed electrodes and provided with a gap formed at a portion of an outer periphery towards radial direction. The gap communicates fixed electrode rear spaces of the respective unidirectional microphone units with an external space to serve as a common rear acoustic terminal for the unidirectional microphone units.

Abstract: Provided is an integrated gooseneck condenser microphone including a microphone unit and an output module which are connected to each other. The gooseneck condenser microphone can improve the connection strength of a microphone housing and prevent the generation of noise due to disturbance electromagnetic waves. The gooseneck condenser microphone includes a connection member 20b which is provided at the rear end of a shielded housing 20a and into which the leading end of a supporting pipe 30 is inserted and an electrical insulating member 6 that is interposed between the connection member and the supporting pipe and electrically insulates the connection member from the supporting pipe. A groove portion 5 is formed in the inner circumferential surface of the connection member along the circumferential direction, and the leading ends of the supporting pipe and the electrical insulating member inserted into the connection member are fitted to the groove portion while the diameters thereof are expanded.

Abstract: A condenser microphone includes a support pipe made of a metallic material; a microphone body supported on a front end side of the support pipe, and including a microphone unit and an output module part having a sound signal output circuit and a shield housing; a proximal housing having an output connector therein and attached to a rear end side of the support pipe; a connecting member arranged between the support pipe and the shield housing; and a metal cover arranged in the connecting member and having a peripheral portion contacting with the shield housing. One end of a shield cover of a microphone cable and a ground part of the sound signal output circuit are connected electrically to the metal cover so that a complete shield in which a contact portion between the metal cover and the shield housing is a base point of grounding is formed.

Abstract: A dynamic microphone includes a vibration pickup that detects vibration of a dynamic microphone unit, and outputs a signal for cancelling vibration noise; and a microphone case that supports the microphone unit and the vibration pickup, wherein the vibration pickup includes a laminated ceramic piezoelectric element that detects vibration of a microphone unit case and outputs a signal corresponding to the detected vibration, the laminated ceramic piezoelectric element has a capacitance that defines a resonance circuit in conjunction with an inductance of an inductor, the resonance circuit producing a response signal to acceleration corresponding to that of the vibration noise, and the resonance circuit is connected such that the response signal is output in an opposite direction to the vibration noise signal.

Abstract: A base having a flat shape; a support provided on a bottom surface of the base; a microphone unit incorporated in the base and converts sound into an electric signal; and a pressure sensitive switch with which an output signal from the microphone unit is turned on and off are included. At least one such pressure sensitive switch is provided to be pressed between the base and the support.

Abstract: Provided is an integrated gooseneck condenser microphone including a microphone unit and an output module which are connected to each other. The gooseneck condenser microphone can improve the connection strength of a microphone housing and prevent the generation of noise due to disturbance electromagnetic waves. The gooseneck condenser microphone includes a connection member 20b which is provided at the rear end of a shielded housing 20a and into which the leading end of a supporting pipe 30 is inserted and an electrical insulating member 6 that is interposed between the connection member and the supporting pipe and electrically insulates the connection member from the supporting pipe. A groove portion 5 is formed in the inner circumferential surface of the connection member along the circumferential direction, and the leading ends of the supporting pipe and the electrical insulating member inserted into the connection member are fitted to the groove portion while the diameters thereof are expanded.

Abstract: Electro-acoustic converters each include a diaphragm, and a fixed electrode apart from the diaphragm for a certain distance and facing the diaphragm. The electro-acoustic converters are anteroposteriorly disposed on the same axis in a single casing, and are electrically connected in series. The front and rear converters each include impedance converters, and are serially connected with each other together with the impedance converters.

Abstract: There is provided a condenser microphone unit in which the shield of a shielding member that covers a front acoustic terminal from the inside of a unit case is assured to prevent noise caused by electromagnetic waves radiated especially from a cellular phone from being generated. In a condenser microphone unit including a metallic cylindrical unit case 10 having a front acoustic terminal 11 on one end side; an electrostatic acousto-electric converter 20 housed in the unit case 10; and a shielding member 30 disposed between the acousto-electric converter 20 and the front acoustic terminal 11 to cover the front acoustic terminal 11 from the inside of the unit case 10, as the shielding member 30, there is used a shielding plate 32 consisting of a metallic porous plate integrally having a plurality of locking pieces 33, which dig into the inner wall surface of the unit case 10 on account of elastic deformation, in the peripheral edge part thereof.

Abstract: There is provided a unidirectional condenser microphone unit in which the shield performance of a rear acoustic terminal is assured by simple assembling work without an increase in cost.

Abstract: A dynamic microphone includes a vibration pickup that detects vibration of a dynamic microphone unit, and outputs a signal for cancelling vibration noise; and a microphone case that supports the microphone unit and the vibration pickup, wherein the vibration pickup includes a laminated ceramic piezoelectric element that detects vibration of a microphone unit case and outputs a signal corresponding to the detected vibration, the laminated ceramic piezoelectric element has a capacitance that defines a resonance circuit in conjunction with an inductance of an inductor, the resonance circuit producing a response signal to acceleration corresponding to that of the vibration noise, and the resonance circuit is connected such that the response signal is output in an opposite direction to the vibration noise signal.

Abstract: In a boundary microphone, a high-frequency current caused by extraneous electromagnetic waves is prevented from flowing into a microphone case via a microphone cord that is drawn into the microphone case. A portion in which the microphone cord 31 consisting of a two-core shield covered wire is drawn into the microphone case 1 is made a shielding wire exposed part 310 formed by removing a skin 31d, and the shielding wire exposed part 310 is connected electrically to a base part 10 via an electrical connecting means 40 (preferably, a conductive cloth 41, and further preferably, the conductive cloth 41 that is formed into a washer shape having an insertion hole for the shielding wire exposed part 310 and is arranged so as to close a cord insertion hole 12), whereby the high-frequency current caused by extraneous electromagnetic waves is surely prevented from flowing into the microphone case 1.

Abstract: A membrane pressure-sensitive switch includes a circuit board provided with an electrode pattern detecting electrical conductivity, a membrane having a conductive surface, and a spacer interposed between the membrane and the circuit board. The electrode pattern is surrounded by a ground pattern on the front surface of the circuit board. The ground pattern on the front surface is connected to another ground pattern on the rear surface of the circuit board. The spacer is composed of a conductive material. The conductive surface of the membrane, the ground pattern on the front surface of the circuit board, and the spacer are electrically conducted. The electrode pattern is disposed between the conductive surface of the membrane and the other ground pattern on the rear surface of the circuit board.

Abstract: A boundary microphone, comprising: a base made of a metal; a cover made of a metal having a plurality of holes for introducing sound waves; and internal components including a microphone unit that is disposed in an internal space enclosed by the base and the cover; a first metallic part disposed on one side of the upper and lower sides of the internal components; and a second metallic part, which is disposed on other side of the upper and lower sides of the internal components and which encloses the internal components along with the first metallic part from all directions, are provided, wherein the base, the cover, the first metallic part, and the second metallic part are alternately overlapped at their peripheral portions, and wherein at least one of the first metallic part and the second metallic part is made of a metallic mesh.

Abstract: In an integral type condenser microphone having a flexible pipe, noise is prevented from being generated even if a cellular phone that radiates strong electromagnetic waves is used at close range.