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公开(公告)号：US20240236559A9
公开(公告)日：2024-07-11
申请号：US18277930
申请日：2021-02-24
CPC分类号： H04R1/403 , H04R3/12 , H04R5/023 , H04R2203/12 , H04R2499/13
摘要： 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. An acoustic system including: a directivity control device including at least one directivity control unit that generates a first processed acoustic signal from a first acoustic signal and generates a second processed acoustic signal from a second acoustic signal having an opposite phase to the first acoustic signal by executing predetermined signal processing; and a speaker system including at least one speaker unit pair including a positive speaker unit that emits a sound based on the first processed acoustic signal and a negative speaker unit that emits a sound based on the second processed acoustic signal, in which the signal processing executed by the directivity control unit is processing of causing a sound emitted from the positive speaker unit of the speaker unit pair and a sound emitted from the negative speaker unit of the speaker unit pair to be audible in an area to be made audible near the speaker unit pair and to be inaudible in an area to be made inaudible.
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公开(公告)号：US20240185828A1
公开(公告)日：2024-06-06
申请号：US18553150
申请日：2021-04-05
IPC分类号： G10K11/178
CPC分类号： G10K11/17881
摘要： 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.
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公开(公告)号：US20240129663A1
公开(公告)日：2024-04-18
申请号：US18277942
申请日：2021-02-24
IPC分类号： H04R1/32
CPC分类号： H04R1/323
摘要： 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.
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公开(公告)号：US20230377550A1
公开(公告)日：2023-11-23
申请号：US18031135
申请日：2020-10-28
IPC分类号： G10K11/178
CPC分类号： G10K11/17823 , G10K11/17881 , G10K2210/3044 , G10K11/17825 , G10K2210/3026 , G10K2210/3046 , G10K2210/3224 , G10K2210/128 , G10K2210/3027 , G10K2210/509
摘要： 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. The m-th silencing speaker unit is arranged so that a sound emitted from the m-th silencing speaker unit in the m-th silencing user direction is silenced at a place other than a place close to the head of the user who uses the seat due to coming around of a sound emitted from the m-th silencing speaker unit in a direction opposite to the m-th silencing user direction.
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公开(公告)号：US20220329940A1
公开(公告)日：2022-10-13
申请号：US17632852
申请日：2019-08-06
发明人： Masahiro FUKUI
IPC分类号： H04R3/02
摘要： 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.
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公开(公告)号：US20210229604A1
公开(公告)日：2021-07-29
申请号：US17263867
申请日：2019-07-10
摘要： An object is to provide a sound collection apparatus capable of collecting a sound with a higher SN rate than before through use of a reflected sound. The sound collection apparatus is installed in a vehicle. The vehicle includes a seat for a passenger to sit on, and a reflective structure that reflects a sound emitted by a passenger sitting in the seat. The sound collection apparatus includes a first microphone arranged at a position where a direct sound that is a sound emitted by the passenger is readily collected, and a second microphone arranged at a position where a reflected sound that is a sound emitted by the passenger and reflected by the reflective structure is readily collected.
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公开(公告)号：US20240129664A1
公开(公告)日：2024-04-18
申请号：US18277948
申请日：2021-02-24
CPC分类号： H04R1/403 , H04R5/023 , H04R2499/13
摘要： 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. An acoustic system including a speaker system that includes at least one speaker unit pair including a positive speaker unit that emits a sound based on an acoustic signal of a predetermined sound source and a negative speaker unit that emits a sound based on an acoustic signal having an opposite phase to the acoustic signal, in which the speaker unit pair is configured such that a surface of the positive speaker unit and a surface of the negative speaker unit located foremost when viewed from a front direction are one plane perpendicular to a ground plane, and an arrangement of the positive speaker unit and the negative speaker unit when viewed from the front direction is parallel to a direction perpendicular to the ground plane, and is configured such that sounds emitted from the positive speaker unit and the negative speaker unit in a rear direction go around in the front direction.
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公开(公告)号：US20230164483A1
公开(公告)日：2023-05-25
申请号：US17917210
申请日：2020-04-09
发明人： Kazunori KOBAYASHI , Masahiro FUKUI
CPC分类号： H04R1/403 , H04R5/02 , H04R2201/40
摘要： 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.
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公开(公告)号：US20230076338A1
公开(公告)日：2023-03-09
申请号：US17795851
申请日：2020-01-30
摘要： 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. An objective evaluation value acquisition unit 33 acquires a first evaluation value by treating a voice signal obtained by combining a voice signal resulting from a first voice signal being emitted from a sound source in a seat belonging to the far-end acoustic region 200, picked up by the microphone M2, and emitted from the speaker S1 with a voice signal arriving at a seat belonging to the near-end acoustic region 100 as a result of the first voice signal being transmitted through the space inside the vehicle as an evaluation target sound, and treating the first voice signal as a reference sound. An evaluation value reuse unit 37 acquires the first evaluation value as an evaluation value of communication between a seat belonging to the near-end acoustic region 100 and a seat belonging to the far-end acoustic region 200.
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公开(公告)号：US20230379628A1
公开(公告)日：2023-11-23
申请号：US18031331
申请日：2020-10-28
CPC分类号： H04R5/023 , H04R3/12 , H04R2499/13 , H04R2205/024
摘要： 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 closer to the ears not to be opposite in phase to each other.
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