Patents Assigned to Kabushiki Kaisha Audio-Technica
  • Patent number: 10249287
    Abstract: A headphone includes a feedback microphone that receives a front air chamber sound including an external sound, the feedback microphone being provided on a front air chamber side, a driver unit that emits a noise-canceling sound into the front air chamber, the noise-canceling sound canceling at least a part of the sound included in the front air chamber sound received by the feedback microphone, a balanced microphone that receives the noise-canceling sound emitted from the driver unit, the balanced microphone being provided in a region on a side of the driver unit opposite the front air chamber, and a sound generating part that generates the noise-canceling sound by adding a signal based on the noise-canceling sound received by the balanced microphone to a signal based on the front air chamber sound received by the feedback microphone.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: April 2, 2019
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventors: Koji Otsuka, Yumi Shimazaki, Daisuke Yoneyama
  • Patent number: 10204615
    Abstract: A noise-cancelling headphone is provided that avoids an influence of the wind and prevents degradation in the sound quality of the reproduced sound output from a driver unit. The noise-cancelling headphone includes an ear piece including a housing unit having an interior and an exterior, a driver unit attached to the housing unit, and a microphone collecting external sounds at the exterior of the housing unit. The housing unit includes an accommodating portion accommodating the microphone and a sound collecting hole establishing the communication between the accommodating portion and the exterior of the housing unit. The accommodating portion is disposed in an upper portion of the housing unit of the noise-cancelling headphone when worn by the user. The sound collecting hole is open toward the upper side of the housing unit of the noise-cancelling headphone when worn by the user.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: February 12, 2019
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Koji Otsuka, Yumi Shimazaki, Kozo Ando
  • Patent number: 10149030
    Abstract: The present invention provides a microphone including: a microphone unit including a vibration plate that vibrates in response to sound; a unit board disposed rearward of the vibration plate; a first ground pattern disposed on the rear surface of the unit board; a unit casing accommodating the microphone unit and the unit board; a contact region of the unit casing, the contact region being in contact with the first ground pattern; a main board having a side face having a second ground pattern, the second ground pattern being in contact with the contact region; and an adhesive joining the side face of the main board to the microphone unit.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: December 4, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 10123130
    Abstract: A diaphragm is provided that has small mechanical anisotropy even when heat is applied to the diaphragm in the production process. The diaphragm includes a biaxially stretched film stretched in a first direction (the machine direction) and a second direction (the transverse direction), wherein the entire surface of the biaxially stretched film has a first pattern and a second pattern, the first pattern has ridges and grooves with a first pitch, the second pattern has ridges and grooves with a second pitch, the second pitch is smaller than the first pitch, the second pattern is formed along the first direction or the second direction, and the length of regions defined by the first pattern in the first direction differs from the length of the regions in the second direction.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: November 6, 2018
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 10080072
    Abstract: A microphone includes a tubular microphone case having conductivity, a circuit board on which a circuit is configured, the circuit being used for an operation of a microphone unit that converts an audio signal into an electrical signal, a light source that is accommodated in a position close to a first end of the microphone case and emits light, a light source mounting board on which the light source is placed, a holding member that has conductivity, holds the light source mounting board and the circuit board, and is fixed to the microphone case, and a light guide member including a protrusion. The holding member includes a light source mounting board accommodating portion that accommodates the light source mounting board, a circuit board accommodating portion that accommodates the circuit board, and a hole that can accept the protrusion.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: September 18, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroaki Furuya
  • Patent number: 10057677
    Abstract: An electroacoustic transducer includes a driver, a diaphragm 13 driven to vibrate by the driver and emitting sound, a baffle 22 holding the driver and the diaphragm 13, first openings 25 extending through the baffle 22, an acoustic resistor 23 disposed on the back side of the baffle 22, and second openings 26 extending from the front side to the back side of the acoustic resistor 23. The baffle 22 is provided on the back side of the diaphragm 13. The first openings 25 are provided in the baffle 22. The second openings 26 are each disposed above one of the first openings 25 in the acoustic resistor 23. The electroacoustic transducer exhibits an excellent frequency response even if a sufficient volume of a space is not provided on the back side of the diaphragm 13.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: August 21, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventors: Yoji Honda, Kenzo Tsuihiji, Koichiro Tanoue, Kenji Arai
  • Patent number: 10057671
    Abstract: To enable light to be easily visually recognized, the light indicating an operation state. A tubular microphone case, a light source that is accommodated in a position close to a first end of the microphone case and emits light in a direction of the first end, a light source mounting board on which the light source is placed, a light guide member including a protrusion and having an optically transmissive property, and a holding member that maintains a position of the light source and a position of the light guide member, and is fixed to the microphone case together with the light source mounting board are included, and the holding member includes a hole capable of accepting the protrusion.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: August 21, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroaki Furuya
  • Patent number: 10021471
    Abstract: To prevent penetration of water into a microphone unit side even if the rain falls on a cylindrical acoustic tube in a narrow directional microphone using the acoustic tube. The narrow directional microphone includes a cylindrical acoustic tube base portion, the acoustic tube base portion includes at least one slit-like opening extending along a longitudinal direction of the acoustic tube base portion, a plurality of short fibers are implanted in an outer peripheral surface of the acoustic tube base portion and base portion edge surfaces that form the opening, and the opening is covered with the short fibers.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: July 10, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 10015587
    Abstract: A dynamic microphone that enables taking a long propagation path of a sound wave on a back side of a diaphragm, and by which unidirectivity can be obtained even at a low frequency. The dynamic microphone includes: a dynamic microphone unit; and an air chamber provided on a back side of a diaphragm of the dynamic microphone unit, wherein the air chamber is folded back to make a propagation path of a sound wave on the back side of the diaphragm long, a plurality of acoustic resistors is arranged in the air chamber at intervals to each other in a direction of the propagation path of a sound wave, and acoustic resistance values of the plurality of acoustic resistors become higher as the propagation path of a sound wave goes away from the diaphragm.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: July 3, 2018
    Assignee: KABUSHIKI KAISHA AUDIO TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 10003884
    Abstract: A microphone apparatus includes a microphone including first and second bi-directional microphone units having respective directional axes arranged on two straight lines passing through one point and radially extending with an interval of 120 degrees in a circumferential direction, and an omnidirectional microphone unit arranged in sound collection regions of the first and second bi-directional microphone units, and a signal synthesis unit that synthesizes at least one of respective non-inverted signals and inverted signals of the first and second bi-directional microphone units and an output signal of the omnidirectional microphone unit to generate a plurality of output signals having directional axes in mutually different directions.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: June 19, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Satoshi Yoshino
  • Patent number: 9992578
    Abstract: In a unidirectional dynamic microphone unit, a cylindrical tube is provided to cover the microphone unit, a cylindrical wall of a first cylindrical portion that is included in the cylindrical tube and extends to at least the rearward is provided with a rear sound wave introducing portion weighted such that an acoustic resistance value is gradually made smaller toward the rearward side from positions of sound holes for taking in a sound wave transmitting around from the rearward side, preferably formed of a trumpet-shaped opening, and it is possible to enhance the sensibility to sound pressures without degradation of the frequency response and the directionality.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: June 5, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventors: Tatsuya Ikeda, Hiroshi Akino
  • Patent number: 9980027
    Abstract: A microphone includes a microphone unit configured to convert a sound wave into an electrical signal. A cylindrical housing accommodates the microphone unit, and includes a a first opening portion that transmits the sound wave to the microphone unit. A sheet member having an air-permeable property and a water-repellent property covers the first opening portion. A frame including a second opening portion having a shape corresponding to a shape of the first opening portion covers the sheet member at a position of the first opening portion. A wind screen having a drainage property covers an exterior of the housing.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: May 22, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Tatsuya Ikeda
  • Patent number: 9980039
    Abstract: To obtain a unidirectional microphone with high sound quality, which achieves unidirectivity while preventing deterioration in sound quality of a ribbon microphone. A unidirectional condenser microphone and bi-directional ribbon microphones are included, and the unidirectional condenser microphone and the bi-directional ribbon microphones are disposed such that a 0° direction of a sound collecting axis of the unidirectional condenser microphone accords with a 180° direction of sound collecting axes of the bi-directional ribbon microphones, and an output of the unidirectional condenser microphone is subtracted from an output of the 180° direction of the bi-directional ribbon microphones.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: May 22, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 9967678
    Abstract: A unidirectional condenser microphone unit is provided that have directionality unaffected by the external environment, and a method of manufacturing the unidirectional condenser microphone. The unidirectional condenser microphone unit having an interior and an exterior, the unidirectional condenser microphone includes a diaphragm, a fixed electrode facing the diaphragm, the fixed electrode constituting a capacitor with the diaphragm, an insulating base disposed in a back face side of the fixed electrode, the insulating base supporting the fixed electrode, an air chamber disposed in the back face side of the fixed electrode, and a gap disposed between the fixed electrode and the insulating base. The fixed electrode includes at least one sound hole in communication with the air chamber. The insulating base includes a communication hole establishing communication between the gap and the exterior of the microphone unit. The air chamber and the gap are in communication with each other.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: May 8, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 9959858
    Abstract: A noise-cancelling headphone is provided that avoids an influence of the wind and prevents degradation in the sound quality of the reproduced sound output from a driver unit. The noise-cancelling headphone includes an ear piece including a housing unit having an interior and an exterior, a driver unit attached to the housing unit, and a microphone collecting external sounds at the exterior of the housing unit. The housing unit includes an accommodating portion accommodating the microphone and a sound collecting hole establishing the communication between the accommodating portion and the exterior of the housing unit. The accommodating portion is disposed in an upper portion of the housing unit of the noise-cancelling headphone when worn by the user. The sound collecting hole is open toward the upper side of the housing unit of the noise-cancelling headphone when worn by the user.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: May 1, 2018
    Assignee: KABUSHIKI KAISHA AUDIO TECHNICA
    Inventors: Koji Otsuka, Yumi Shimazaki, Kozo Ando
  • Patent number: 9949019
    Abstract: A microphone includes a tubular first and second acoustic tubes configured with a gap between the second acoustic tube and an inner side of the wall surface of the first acoustic tube. A first opening portion is provided in a wall surface of the first acoustic tube. A second opening portion is provided in a wall surface of the second acoustic tube. A microphone unit is provided inside the second acoustic tube and is configured to acquire sound waves from outside the microphone. A sound wave introduction path formed by the first opening portion, the gap, and the second opening portion, is configured to transmit the sound wave from the outside to the microphone unit.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: April 17, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 9942666
    Abstract: A condenser microphone is provided that can ensure the fixation of an electroacoustic transducer inside a unit case and the grounding of the electroacoustic transducer, regardless of variations in manufacture of the unit case and a circuit board. A condenser microphone unit includes an electroacoustic transducer and a unit case accommodating the electroacoustic transducer. The unit case includes at least one protrusion that is disposed on the inner circumferential surface of the unit case. The electroacoustic transducer is fixed inside the unit case with the protrusion.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: April 10, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventors: Satoshi Yoshino, Hiroaki Furuya
  • Patent number: 9942653
    Abstract: A narrow-angle directional microphone includes: a microphone case; an acoustic tube fit in the microphone case with a gap between the acoustic tube and the microphone case; a microphone element arranged at one end side of the acoustic tube with a clearance that allows a front acoustic terminal and a rear acoustic terminal to communicate into each other between the microphone element and the microphone case; and an acoustic resistance body having elasticity positioned over between the one end side of the acoustic tube and the microphone element to block a passage between the front acoustic terminal and the rear acoustic terminal, whereby adjustments of a degree of compression of the acoustic resistance body are achieved by changes to an interval between the acoustic tube and the microphone element.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: April 10, 2018
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 9936288
    Abstract: Excellent narrow-angle directivity is obtained by causing a microphone case main body to function as an acoustic tube, reducing a weight of a microphone, and suppressing leakage of sound waves from an inside of the acoustic tube to an outside. An acoustic tube microphone case includes a microphone case main body made of a metal tube having a plurality of openings formed in a peripheral surface, and acoustic resistance materials formed in a rectangular sheet manner, cylindrically rounded such that both right and left ends are mutually in contact, and arranged along an inner peripheral surface of the microphone case main body. A plurality of the acoustic resistance materials is layered, and at least the innermost acoustic resistance material applies a force in a developing direction by an elastic force thereof, and presses the outside acoustic resistance materials against the inner peripheral surface of the microphone case main body.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: April 3, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: D822635
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 10, 2018
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Kozo Ando, Shohei Araki