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公开(公告)号：US11805367B2
公开(公告)日：2023-10-31
申请号：US17734319
申请日：2022-05-02
Applicant: Alps Alpine Co., LTD
Inventor： Hiroki Toita , Ryosuke Tachi , Ryo Ito
CPC classification number: H04R9/027 , G01R33/072 , H04R1/2803 , H04R3/002 , H04R9/025 , H04R9/046 , H04R9/06 , H04R29/001 , H04R2400/11
Abstract: A vibrating unit includes a diaphragm and a bobbin, and a voice coil is secured to the bobbin. A detecting unit includes a moving magnet and a magnetic sensor. An annular magnet support is secured to a front edge of the bobbin, and the moving magnet is positioned and secured to the magnet support. The magnetic sensor is secured to a drive supporting unit. The moving magnet is secured to the bobbin, with the magnet support therebetween. This facilitates mounting and positioning of the moving magnet.
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公开(公告)号：US11622195B2
公开(公告)日：2023-04-04
申请号：US17363228
申请日：2021-06-30
Inventor： Ryosuke Tachi , Yoshinobu Kajikawa
Abstract: Adaptive operations of a first noise control system and a second noise control system may include a speaker that outputs noise cancellation sound, a microphone that detects an error signal, an auxiliary filter that generates, from a noise signal, a correction signal that corrects the error signal so that a difference in a position between the microphone and a noise cancellation position is compensated, and an adaptive filter that performs an adaptive operation using the corrected error signal to generate the noise cancellation sound from the noise signal are alternately performed. A transfer function learned in a state in which the second noise control system is stopped is set in the auxiliary filter of the first noise control system, and a transfer function learned in a state in which the adaptive operation of the first noise control system is stopped is set in the auxiliary filter of the second noise control system.
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公开(公告)号：US11956604B2
公开(公告)日：2024-04-09
申请号：US17858248
申请日：2022-07-06
Applicant: ALPS ALPINE CO., LTD.
Inventor： Ryosuke Tachi , Hiroyuki Taguchi
CPC classification number: H04R3/002 , H04R1/025 , H04R1/406 , H04R3/04 , H04R2201/401 , H04R2410/01 , H04R2499/13
Abstract: A right seat processing unit includes, assuming that a voice of a user in a right front seat is a right front seat voice, a filter HR that converts the right front seat voice being output from a left front seat microphone disposed on a headrest of a left front seat into the right front seat voice collected by a right seat virtual microphone that is a virtual microphone located on a left side of a headrest of the right front seat, a delay unit Z-TR that delays and outputs an output from a right front seat microphone located on a right side of the headrest of the right front seat, a filter WRA that extracts the right front seat voice being output from the filter HR, a filter WRB that extracts the right front seat voice being output from the delay unit Z-TR, and a right adder that adds outputs of the filter WRA and the filter WRB and outputs an added output as a right front seat speech voice signal.
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公开(公告)号：US11756523B2
公开(公告)日：2023-09-12
申请号：US17689327
申请日：2022-03-08
Applicant: Alps Alpine Co., LTD
Inventor： Ryosuke Tachi
IPC: H04B1/00 , G10K11/178 , G10L21/0208 , G10L25/84 , H04R1/40 , H04R3/00 , G10K11/16
CPC classification number: G10K11/17817 , G10K11/17854 , G10K11/17857 , G10L21/0208 , G10L25/84 , H04R1/406 , H04R3/005 , G10L2021/02082 , H04R2499/13
Abstract: In some implementations, an output of a first channel of an echo cancellation variable filter having an output of a first microphone output from a second speaker as an input is added to an output of a second microphone. An echo cancellation coefficient updating unit updates the filter coefficient of the first channel so that the error that is the output of a second adder is minimized. Using the output of the second channel that uses the output of a sound source device output from the first speaker as an input and shares the filter coefficient with the first channel as a reference signal, and the output of the second microphone as an error, the noise cancellation coefficient updating unit updates the filter coefficient of the noise cancellation variable filter that generates a noise-canceling sound to be output from the output of the sound source device to the second speaker.
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公开(公告)号：US11462203B2
公开(公告)日：2022-10-04
申请号：US17363306
申请日：2021-06-30
Inventor： Ryosuke Tachi , Yoshinobu Kajikawa
IPC: G10K11/178
Abstract: A transfer function of a first variable filter is updated to output, from an output of a first seat microphone, a cancel sound that minimizes a level of a signal obtained by subtracting an output of an auxiliary filter that generates a correction signal for correcting a difference between positions of the first seat microphone and the first seat. In the ICC mode in which the uttered voice of the user in the first seat is output from a second seat speaker, a selector sets an uttered voice Dp output from the second seat speaker as an input to the first variable filter, and in the non-ICC mode, the selector sets an output sound of a second seat audio source output from the second seat speaker as an input to the first variable filter. The uttered voice Dp is generated by removing a component of the cancel sound from the output of the first seat microphone.
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Patent Agency Ranking
公开(公告)号：US20240098443A1
公开(公告)日：2024-03-21
申请号：US17949063
申请日：2022-09-20
Applicant: ALPS ALPINE CO., LTD.
Inventor： Ryosuke Tachi , Taiji Karasawa , Francesto Villamizar
IPC: H04S7/00
CPC classification number: H04S7/303
Abstract: A surround sound entertainment system configured to determine a microphone position relative to a first loudspeaker, the system comprising: first loudspeaker interface configured to send first acoustic signals to first loudspeaker; second loudspeaker interface configured to send second acoustic signals to second loudspeaker; microphone interface configured to receive microphone data from microphone; acoustic processor configured to generate acoustic signal output to each of first and second loudspeakers; and non-transitory memory comprising instructions executable by the acoustic processor, instructions when executed by acoustic processor, cause system to: receive microphone data via microphone interface; determine, using microphone data, time delay between reproduction of first acoustic signals on first loudspeaker and reception of corresponding sound by microphone; determine, using time delay, position of microphone relative to first loudspeaker; and determine, based on position of microphone relative to first loudspeaker, first filter parameter for modifying first acoustic signals or second acoustic signals.
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公开(公告)号：US20230018804A1
公开(公告)日：2023-01-19
申请号：US17858248
申请日：2022-07-06
Applicant: ALPS ALPINE CO., LTD.
Inventor： Ryosuke Tachi , Hiroyuki Taguchi
Abstract: A right seat processing unit includes, assuming that a voice of a user in a right front seat is a right front seat voice, a filter HR that converts the right front seat voice being output from a left front seat microphone disposed on a headrest of a left front seat into the right front seat voice collected by a right seat virtual microphone that is a virtual microphone located on a left side of a headrest of the right front seat, a delay unit Z-TR that delays and outputs an output from a right front seat microphone located on a right side of the headrest of the right front seat, a filter VVRA that extracts the right front seat voice being output from the filter HR, a filter WRB that extracts the right front seat voice being output from the delay unit Z-TR, and a right adder that adds outputs of the filter WRA and the filter WRB and outputs an added output as a right front seat speech voice signal.
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公开(公告)号：US20230012785A1
公开(公告)日：2023-01-19
申请号：US17860861
申请日：2022-07-08
Applicant: Alps Alpine Co., LTD
Inventor： Yuji Saito , Hiroki Toita , Hiroyuki Taguchi , Ryosuke Tachi , Tatsuya Mashiko
IPC: H04R3/00
Abstract: In a speaker distortion correction device, an input signal passes through a nonlinear-portion correction filter and is input into a linear inverse filter. An output signal from the linear inverse filter is output into a speaker through an amplifier. For the nonlinear-portion correction filter, transfer characteristics (filter coefficients) are set that eliminate distortion due to nonlinear characteristics of the speaker. With a difference, as an error, between vibration of the speaker without distortion relative to an input signal and vibration of a vibration system of the speaker measured by a vibration measurement unit, an adaptive-algorithm execution unit performs an adaptive operation that adaptively updates filter coefficients of the linear inverse filter. When the amplitude of vibration of the vibration system of the speaker measured by the vibration measurement unit deviates from a range that normal relative to an input voltage input into the speaker, a control unit stops the adaptive operation of the adaptive-algorithm execution unit.
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公开(公告)号：US11463808B2
公开(公告)日：2022-10-04
申请号：US17391753
申请日：2021-08-02
Inventor： Ryosuke Tachi , Yoshinobu Kajikawa
Abstract: A first seat noise control device corrects sound collected by a microphone to sound at a listening position of a user seated on a first seat, generates a cancel sound that cancels, at the first seat, the sound of a second seat audio source output from a second seat speaker by using an adaptive filter, and outputs the cancel sound from a first seat speaker. A second seat noise control device corrects the sound collected by the microphone to sound at the listening position of the user seated on the second seat, generates a cancel sound that cancels, at the second seat, the sound of a first seat audio source output from the first seat speaker using an adaptive filter, and outputs the cancel sound from the second seat speaker.
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公开(公告)号：US11462202B2
公开(公告)日：2022-10-04
申请号：US17362287
申请日：2021-06-29
Inventor： Ryosuke Tachi , Yoshinobu Kajikawa
IPC: G10K11/178
Abstract: In a first system signal processing unit, an adaptive filter generates a noise cancel sound, a first system selector selects an output of a first system auxiliary filter corresponding to a noise cancel position matching a detected position of a right ear of a user from a plurality of first system auxiliary filters corresponding to different noise cancel positions, and a first system subtractor subtracts the selected output from an output of a first microphone and outputs the subtracted result as an error signal to a first system adaptive filter and a second system adaptive filter of a second system signal processing unit. The noise cancel positions are arranged at predetermined intervals in a space where the user can move the right ear due to turning and side bending of the head within a predetermined range in the up-down and front-back directions.
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