Patents Assigned to Kabushiki Kaisha Audio-Technica
  • Condenser microphone
    Patent number: 8848950
    Abstract: A condenser microphone includes a plurality of condenser microphone units, each unit including a diaphragm and a fixed electrode one of which has an electret layer thereon. The condenser microphone units include respective sensitivity controllers changing sensitivities of the units. The sensitivity controllers include respective variable resistors connected between a power source and a ground. Each of the variable resistors has a slidable terminal connected to one, opposed to the electret layer, of the diaphragm and the fixed electrode, of the corresponding condenser microphone unit.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 30, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Haruhito Shimura
  • Unidirective condenser microphone unit and condenser microphone
    Patent number: 8848962
    Abstract: A unidirective condenser microphone unit includes a diaphragm; a fixed electrode facing the diaphragm with a gap and defining a capacitor together with the diaphragm; an insulating spacer disposed adjacent to the rear surface of the fixed electrode and supporting the fixed electrode; an acoustic resistor disposed in an air chamber defined by the front surface of the insulating spacer and the fixed electrode; a unit case, a front acoustic terminal; and a rear acoustic terminal. The insulating spacer has a protrusion projecting toward the fixed electrode with a gap, and the protrusion is fixed to the surface of the fixed electrode with fixing material.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: September 30, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Condenser microphone
    Patent number: 8842856
    Abstract: A condenser microphone which prevents a directional axis from varying depending on a sound source frequency is provided. The condenser microphone includes a first reflector member 2 provided below the microphone unit 17 and covering an electronic circuit substrate 19 and a second reflector member 3 formed in the same shape as the first reflector member and provided above the microphone unit, the first reflector member and the second reflector member being disposed symmetrically with respect to the microphone unit.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: September 23, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Dynamic microphone unit and dynamic microphone
    Patent number: 8837756
    Abstract: A dynamic microphone unit includes: a diaphragm that vibrates in response to received sound waves; a voice coil that is fixed to the diaphragm and vibrates together with the diaphragm; a magnetic circuit that generates a magnetic field in a magnetic gap, the voice coil being disposed in the magnetic gap; a resonator that is disposed adjacent to the obverse of the diaphragm; and a noise canceling coil that is fixed to a surface of the resonator so as to face a position of fixing the voice coil, the surface facing the diaphragm. The noise canceling coil is connected in series with the voice coil and has a winding direction different from that of the voice coil.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: September 16, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Phantom power circuit
    Patent number: 8831247
    Abstract: A phantom power circuit has a detection circuit and a limiting circuit, the detection circuit detecting a pulse current generated in association with connection or disconnection of a condenser microphone, the limiting circuit limiting the output of the condenser microphone. The detection circuit detects a pulse current generated between input terminals of the condenser microphone. The limiting circuit reduces the output from the condenser microphone when the detection circuit detects the pulse current.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: September 9, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • CONDENSER STEREOMICROPHONE
    Publication number: 20140241530
    Abstract: A condenser stereomicrophone includes a mid condenser microphone unit that is connected to left and right side condenser microphone units such that the output from the mid condenser microphone unit is applied to the left and right side condenser microphone units. The left and right side condenser microphone units are connected to left and right-channel connector terminals, respectively; and the left and right-channel connector terminals are connected to the mid condenser microphone unit via corresponding power-supply resistors.
    Type: Application
    Filed: February 7, 2014
    Publication date: August 28, 2014
    Applicant: Kabushiki Kaisha Audio-Technica
    Inventors: Ryo Kanatus, Kai Ti Lin
  • Holding device of cylindrical body and microphone holder
    Patent number: 8814118
    Abstract: A microphone holder is provided that allows a microphone to be attached and detached by a one-touch operation and to be securely held. A first and a second magnet 77a and 72b are provided at positions where a holding frame 5 and a clamp arm 6 overlap with each other such that different poles are opposed to each other. The magnets are magnetically attached to each other to lock the movement.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: August 26, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Shioto Okita, Hiroshi Akino
  • Microphone and microphone apparatus
    Patent number: 8804983
    Abstract: A microphone includes a microphone unit having a diaphragm, a fixed electrode and a FET as an impedance converter; a plug outputting audio signals output from the microphone unit; and a jack into which audio signals inputted in the microphone unit are inputted. While the plug of the other microphone is inserted in the jack of the microphone, the audio signals output from the other microphone unit are added to the audio signals output from the microphone unit and are output.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Infrared transmitter
    Patent number: 8798482
    Abstract: An infrared transmitter is obtained that transmits a signal by changing a luminance of an infrared emitting LED, the infrared transmitter including: a transmission signal generating unit; a biasing voltage generating unit that generates a biasing voltage according to a magnitude of a transmission signal; a signal/voltage mixing unit that mixes the transmission signal and the biasing voltage; and a voltage-current conversion unit that converts a voltage into a current, in which the LED is driven by the current obtained by the conversion in the voltage-current conversion unit, so that power consumption efficiency can be improved.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: August 5, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Tatsuji Harima
  • Holding device of cylindrical body and microphone holder
    Patent number: 8783636
    Abstract: In a microphone holder, a microphone can be attached and detached by a one-touch operation and to be securely held. A microphone grip is pressed into between clamp arms in a state where front ends are opened. This causes the microphone grip to press rear ends of the clamp arms to swing the front ends in closing directions. Thus, the microphone can be attached and detached by a one-touch operation without causing collision noise and the like.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: July 22, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Shioto Okita
  • Boundary microphone
    Patent number: 8787592
    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.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: July 22, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Satoshi Yoshino
  • MICROPHONE
    Publication number: 20140198942
    Abstract: A back air room of a microphone unit can be enlarged and a model with a sound signal output switch can easily be diverted to a switchless model. A reed switch 16 is used as the sound signal output switch which turns on or off the sound signal from a microphone unit 1. This reed switch is disposed at an output connector 11 portion at an rear end of a microphone case 6. It is arranged that a magnet 22 is disposed at a connector cover 21 which surrounds an output connector and relative movement of the connector cover with respect to the output connector allows on/off operation. Thus, by removing the connector cover 21, it is possible to provide the microphone as a switchless model which always outputs the sound signal from the microphone unit 1.
    Type: Application
    Filed: January 2, 2014
    Publication date: July 17, 2014
    Applicant: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventors: Hiroaki FURUYA, Hiroshi AKINO
  • Battery case of headphone and headphone having the same
    Patent number: 8774445
    Abstract: A case for storing a battery which supplies drive power for a headphone includes a case body to which the battery is stored and which is capable of being inserted to an insertion hole formed at a headphone chassis and a lock pawl which is capable of being locked with a lock hole formed at the headphone chassis, while a positive terminal which is connected to a positive electrode of the battery stored in the case body and a negative terminal which is connected to a negative electrode of the battery stored in the case body are arranged, and then, a leading terminal which is connected to either the positive electrode or the negative electrode is arranged at the case body and the leading terminal is connected to either the positive terminal or the negative terminal.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: July 8, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Yoshiko Ohtani, Hiroyasu Suzuki
  • Microphone unit and highly directional microphone
    Patent number: 8774438
    Abstract: A microphone unit has a diaphragm vibrating in response to sound waves; a unit casing accommodating the diaphragm; and a connecting path connecting a front acoustic terminal and a rear acoustic terminal. The unit casing has a small-diameter internal periphery defining the front acoustic terminal; a large-diameter internal periphery accommodating built-in components including the diaphragm; and a shoulder provided between the small-diameter internal periphery and the large-diameter internal periphery and positioning the built-in components. The unit casing has a groove in an axial direction provided in the large-diameter internal periphery and a groove in a radial direction provided in the shoulder and being in communication with the groove in the axial direction. The groove in the axial direction and the groove in the radial direction configure the connecting path.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: July 8, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Noise canceling headphone and noise canceling earmuff
    Patent number: 8774421
    Abstract: A noise canceling headphone includes a microphone provided in a headphone housing, collecting external sound, a canceling signal generating circuit generating a canceling signal in response to a signal output from the microphone which cancels external sound passing through the housing without being attenuated by a sound insulating characteristic of the headphone, a compensating signal generating circuit generating a compensating signal that compensates for the external sound attenuated by the sound insulating characteristic of the headphone, an adding circuit that adds a musical signal input from the exterior to the compensating signal, and a speaker unit that outputs an output signal from the adding circuit and the canceling signal.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: July 8, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Tominori Kimura
  • Narrow directional stereo microphone
    Patent number: 8761405
    Abstract: A narrow directional stereo microphone includes a narrow directional mid unit disposed such that the directional axis thereof aligns to the major axis of a microphone body, and a unidirectional right unit and a unidirectional left unit disposed symmetrically with respect to the major axis such that directional axes of the right and left units are perpendicular to the major axis, wherein signals output from the mid unit are sent to one of a diaphragm and a fixed electrode of the right unit and to one of a diaphragm and a fixed electrode of the left unit, and right channel signals are output from the other of the diaphragm and the fixed electrode of the right unit, and left channel signals are output from the other of the diaphragm and the fixed electrode of the left unit.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: June 24, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Tatsuya Ikeda, Hiroshi Akino
  • Dynamic microphone unit and dynamic microphone
    Patent number: 8761427
    Abstract: A dynamic microphone unit includes: a diaphragm vibrating in response to received sound waves; a voice coil fixed to the diaphragm and vibrating in cooperation with the diaphragm; a magnetic circuit generating magnetism in a magnetic gap, the voice coil being disposed in the magnetic gap; a first air chamber defined adjacent to the reverse of the diaphragm; and a second air chamber defined behind the voice coil, the second air chamber being in communication with the first air chamber, an elastic thin-plate acoustic resistor being disposed in the second air chamber while having tensile force applied, at a position where the acoustic resistor limits the volume of the second air chamber and comes into contact with the voice coil within a maximum displacement of the voice coil.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: June 24, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Unidirectional dynamic microphone
    Patent number: 8744110
    Abstract: A unidirectional dynamic microphone includes a grip housing, a microphone unit supported at a first end of the grip housing, a plug assembly attached to a second end of the grip housing and connected to the microphone unit through a lead line, and an air room serving as a part of an acoustic circuit of the microphone unit in the grip housing. The grip housing has a fitting part for the plug assembly and an expanded portion. The plug assembly fitted in the fitting part is fixed within the grip housing by an elastic ring and a pressure ring fitted in the expanded portion. The elastic ring seals a space between the grip housing and the plug assembly.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: June 3, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Microphone
    Patent number: D707661
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: June 24, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Shioto Okita, Douglas J. Carpiaux, Jesse D Cotterman
  • Microphone holder
    Patent number: D707662
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: June 24, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Shioto Okita