Patents by Inventor Masahiro Fukui

Masahiro Fukui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250087200
    Abstract: A technology is provided that reduces noise heard when a user sits in a seat of an aircraft, without using earphones or headphones. A sound system includes: a control system that generates a control signal for canceling noise in a place close to a head of a user using a seat of an aircraft, from a signal of the noise (noise signal); and a noise-cancellation speaker system including speaker units that emit sound based on the control signal (first noise-cancellation speaker unit, . . .
    Type: Application
    Filed: November 22, 2024
    Publication date: March 13, 2025
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI
  • Patent number: 12250517
    Abstract: A sound system, for a user using a seat of an aircraft, an automobile, or the like, that reproduces sound inaudible to users around, without using earphones or headphones, is provided. A sound system for a user using a seat of an aircraft includes: a reproduction apparatus including an n-th reproduction unit (n=1, . . . , N) that outputs a (2n?1)-th sound signal that is a sound signal obtained based on a subject to be reproduced, and a 2n-th sound signal that is a sound signal with opposite phase to phase of the (2n?1)-th sound signal, N being an integer equal to or larger than one; and a speaker system including an n-th speaker unit pair (n=1, . . . , N) including a speaker unit that emits sound based on the (2n?1)-th sound signal (hereinafter, referred to as the positive speaker unit) and a speaker unit that emits sound based on the 2n-th sound signal (hereinafter, referred to as the negative speaker unit), the speaker system being installed at a place close to a head of the user using the seat.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: March 11, 2025
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro Fukui, Kazunori Kobayashi
  • Publication number: 20250079092
    Abstract: A solid electrolytic capacitor includes a capacitor element and an exterior body that seals the capacitor element. The capacitor element includes an anode body, a dielectric layer that is formed on the surface of the anode body, a cathode part that covers at least a portion of the dielectric layer, an anode lead with one end portion electrically connected to the anode body, and a cathode lead with one end portion electrically connected to the cathode part. The other end portion of the anode lead and the other end portion of the cathode lead are drawn out from the exterior body. The cathode part includes a solid electrolyte layer that covers at least a portion of the dielectric layer. When the solid electrolytic capacitor is subjected to a processing corresponding to mounting reflow, the amount of gas generated is 1600 ?L or less.
    Type: Application
    Filed: October 24, 2022
    Publication date: March 6, 2025
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masahiro Sato, Hitoshi Fukui
  • Patent number: 12221349
    Abstract: Provided are exfoliated graphite that rarely folds, rarely curls, and rarely causes corrosion of an electrode when used as the electrode material, and a method for manufacturing the exfoliated graphite. Exfoliated graphite being graphene or a laminate of graphene sheets, the exfoliated graphite having a ratio 2 D/G of 0.5 or more and 5.0 or less, the ratio 2 D/G being a peak area ratio of a 2 D band to a G band in a Raman. spectrum measured. using Raman spectroscopy, and a halogen content of 1,000 ppm or less.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: February 11, 2025
    Assignees: SEKISUI CHEMICAL CO., LTD., OITA UNIVERSITY
    Inventors: Hiroji Fukui, Akira Nakasuga, Masahiro Toyoda
  • Patent number: 12190856
    Abstract: A technology is provided that reduces noise heard when a user sits in a seat of an aircraft, without using earphones or headphones. A sound system includes: a control system that generates a control signal for canceling noise in a place close to a head of a user using a seat of an aircraft, from a signal of the noise (noise signal); and a noise-cancellation speaker system including speaker units that emit sound based on the control signal (first noise-cancellation speaker unit, . . .
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: January 7, 2025
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro Fukui, Kazunori Kobayashi
  • Patent number: 12108209
    Abstract: The speaker array includes a first speaker 1, a second speaker 2, and a local sound emission structure 3. The first transmission portion 311 and the second transmission portion 312 are arranged in such a manner that the distance between the center position of the first transmission portion 311 and the center position of the second transmission portion 312 is smaller than the distance between the center position of the first speaker 1 and the center position of the second speaker 2, in order to generate sound sources that are arranged at an interval narrower than the interval between the first speaker 1 and the second speaker 2.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: October 1, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kazunori Kobayashi, Masahiro Fukui
  • Patent number: 12087321
    Abstract: The number of conversational tests needed for the evaluation of acoustic quality of the ICC system is reduced. An evaluation value conversion device 3 evaluates the quality of communication between a near-end acoustic region 100 and a far-end acoustic region 200 inside a vehicle for which a plurality of acoustic regions are predetermined. A voice signal picked up by a microphone M2 disposed in the far-end acoustic region 200 is emitted from a speaker S1 disposed in the near-end acoustic region 100.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: September 10, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Sachiko Kurihara, Noboru Harada, Masahiro Fukui, Akira Nakagawa
  • Publication number: 20240236559
    Abstract: Provided is an acoustic system for a user who uses a seat of an aircraft, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones.
    Type: Application
    Filed: February 24, 2021
    Publication date: July 11, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO, Ryotaro SATO
  • Patent number: 12015902
    Abstract: Provided is an echo cancellation apparatus capable of calculating an acoustic coupling amount with high accuracy regardless of the magnitude of the near-end speaker component and without using a double talk detector. The echo cancellation apparatus cancels an echo included in a sound pickup signal picked up by a microphone placed at a near-end and includes an acoustic coupling amount calculation unit that updates and calculates an acoustic coupling amount estimated value of a component of a reproduction signal, which is a signal picked up by a microphone placed at a far-end included in the sound pickup signal, such that an update amount is decreased the greater a magnitude of a component other than an echo component is in the sound pickup signal; a gain calculation unit that calculates a gain coefficient on the basis of the acoustic coupling amount estimated value; and an integration unit that integrates the gain coefficient with the sound pickup signal and generates an echo cancellation signal.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: June 18, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventor: Masahiro Fukui
  • Publication number: 20240185828
    Abstract: A cancellation device according to one aspect of the invention is a cancellation device that cancels noise coming to a region in a vicinity of a loudspeaker, the cancellation device including at least two loudspeakers 1 and one reference microphone 3, in which the cancellation device is configured such that an acoustic signal emitted in a sound emission direction of a same loudspeaker and an acoustic signal emitted in an opposite direction collide with each other, the at least two loudspeakers 1 and the reference microphone 3 are arranged on a same plane, the at least two loudspeakers 1 emit cancellation sound that cancels the noise in synchrony, and the plane is a plane including a boundary between a sound emission direction of the two loudspeakers 1 and a direction opposite to a sound emission direction.
    Type: Application
    Filed: April 5, 2021
    Publication date: June 6, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryotaro SATO, Noriyoshi KAMADO, Kazunori KOBAYASHI, Masahiro FUKUI
  • Patent number: 12002445
    Abstract: Provided is a technology for generating an elimination filter coefficient for suppressing degradation of noise elimination performance.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: June 4, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kazunori Kobayashi, Masahiro Fukui
  • Publication number: 20240137694
    Abstract: Provided is an acoustic system for a user who uses a seat of an aircraft, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones.
    Type: Application
    Filed: February 24, 2021
    Publication date: April 25, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO, Ryotaro SATO
  • Publication number: 20240129664
    Abstract: Provided is an acoustic system for a user who uses a seat of an aircraft, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones.
    Type: Application
    Filed: February 24, 2021
    Publication date: April 18, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO, Ryotaro SATO
  • Publication number: 20240129663
    Abstract: There is provided an acoustic system for a user who uses a seat of an airplane, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones. An acoustic system including a speaker system including one speaker unit that emits a sound based on an acoustic signal of a predetermined sound source, in which a sound emitted from the speaker unit is hearable in a region to be audible near the speaker unit, and by a sound emitted from the speaker unit in a back surface direction coming around to a front surface direction, the sound emitted from the speaker unit in the front surface direction and the sound emitted from the speaker unit in the back surface direction cancel each other in a region in the front surface direction far from the speaker unit.
    Type: Application
    Filed: February 24, 2021
    Publication date: April 18, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO, Ryotaro SATO
  • Publication number: 20240007787
    Abstract: A sound that cannot be heard by surrounding users is reproduced. A reproduction device (110) includes an n-th reproduction unit that outputs a 2n?1th acoustic signal (n=1, . . . , N) that is an acoustic signal obtained on the basis of a reproduction target and a 2n-th acoustic signal that is an acoustic signal having a phase opposite to that of the 2n?1th acoustic signal. A speaker system (120) includes a set of an n-th speaker unit pair (122) including a positive speaker unit (1221) that emits a 2n?1th acoustic signal-based sound and a negative speaker unit (1222) that emits a 2n-th acoustic signal-based sound, the n-th speaker unit pair being installed at a position close to a user's head.
    Type: Application
    Filed: November 6, 2020
    Publication date: January 4, 2024
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO
  • Publication number: 20230379627
    Abstract: Two speaker units are arranged on the right side from the center of a seat; two speaker units are arranged on the left side from the center of the seat; one of the two speaker units arranged on the right side is arranged at a position closer to the right ear of the user seated on the seat as compared with the other one of the two speaker units arranged on the right side; one of the two speaker units arranged on the left side is arranged at a position closer to the left ear of the user seated on the seat as compared with the other one of the two speaker units arranged on the left side; acoustic signals of a reproduction target are emitted from the two speaker units arranged on the right side to be opposite in phase to each other; the acoustic signals of the reproduction target are emitted from the two speaker units arranged on the left side to be opposite in phase to each other; and the acoustic signals are emitted from the two speaker units arranged at positions closer to the ears not to be opposite in phase
    Type: Application
    Filed: October 28, 2020
    Publication date: November 23, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO
  • Publication number: 20230377550
    Abstract: A sound system includes: a control system that generates a control signal for erasing noise from a signal of the noise in a place close to a head of a user who uses a seat; a silencing speaker system that is installed at the place close to the head of the user who uses the seat and includes M speaker units each emitting a sound based on the control signal; and an emission suppression unit including at least a sound absorbing material that easily absorbs only a sound having a frequency greater than or equal to a predetermined value and configured to make it difficult for the sound having the frequency greater than or equal to the predetermined value emitted from the silencing speaker units to be emitted to a place other than an ear of the user.
    Type: Application
    Filed: October 28, 2020
    Publication date: November 23, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO
  • Publication number: 20230379628
    Abstract: Two speaker units are arranged on the right side from the center of a seat; two speaker units are arranged on the left side from the center of the seat; one of the two speaker units arranged on the right side is arranged at a position closer to the right ear of a user seated on the seat as compared with the other one of the two speaker units arranged on the right side; one of the two speaker units arranged on the left side is arranged at a position closer to the left ear of the user seated on the seat as compared with the other one of the two speaker units arranged on the left side; acoustic signals obtained on the basis of a reproduction target are emitted from the two speaker units arranged on the right side to be opposite in phase to each other; the acoustic signals obtained on the basis of the reproduction target are emitted from the two speaker units arranged on the left side to be opposite in phase to each other; and the acoustic signals are emitted from two speaker units arranged on the positions close
    Type: Application
    Filed: October 28, 2020
    Publication date: November 23, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO
  • Publication number: 20230370770
    Abstract: A sound that cannot be heard by surrounding users is reproduced. A reproduction device (110) includes an n-th reproduction unit that outputs a 2n?1th acoustic signal (n=1, . . . , N) that is an acoustic signal obtained on the basis of a reproduction target and a 2n-th acoustic signal that is an acoustic signal having a phase opposite to that of the 2n?1th acoustic signal. A speaker system (120) includes at least two or more sets of an n-th speaker unit pair (122) including a positive speaker unit (1221) that emits a 2n-1th acoustic signal-based sound and a negative speaker unit (1222) that emits a 2n-th acoustic signal-based sound, the n-th speaker unit pair being installed at a position close to a user's head.
    Type: Application
    Filed: November 6, 2020
    Publication date: November 16, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masahiro FUKUI, Kazunori KOBAYASHI, Noriyoshi KAMADO
  • Publication number: 20230274724
    Abstract: Provided is a technology for generating an elimination filter coefficient for suppressing degradation of noise elimination performance.
    Type: Application
    Filed: April 16, 2020
    Publication date: August 31, 2023
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kazunori KOBAYASHI, Masahiro FUKUI