JP7439915B2 - 振動キャンセル方法、装置及びプログラム - Google Patents
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- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
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- G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
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- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17817—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the error signals, i.e. secondary path
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- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
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- G10K11/17823—Reference signals, e.g. ambient acoustic environment
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- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17825—Error signals
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- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
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- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
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- G10K2210/3012—Algorithms
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- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
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- G10K2210/3026—Feedback
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- G10K2210/3027—Feedforward
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- G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
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- G10K2210/3044—Phase shift, e.g. complex envelope processing
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- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
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Description
図1は、第一実施形態の振動キャンセル装置の例の構成図である。第一実施形態の振動キャンセル装置は、振動センサ2、誤差振動センサ3、振動キャンセル部4、推定2次経路フィルタ部5、適応アルゴリズム部7、キャンセルフィルタ部8を例えば備えている。
適応アルゴリズム部7は、例えば、誤差信号e(t)の2乗平均誤差が最小となるようにフィルタ係数を求める。求まったフィルタ係数h(t)は、キャンセルフィルタ部8に出力される。
第二実施形態の振動キャンセル装置は、図3に例示するように、誤差振動センサ3としてマイクロホンを用いる構成である。第二実施形態の他の部分は、第一実施形態と同様である。
第三実施形態の振動キャンセル装置は、図4に例示するように、第一実施形態の振動キャンセル装置において、振動センサ2及び誤差信号センサ3を同一のセンサとしたものである。言い換えれば、第三実施形態においては、振動センサ2及び誤差信号センサ3は同一のセンサで共用される。これにより、振動ピックアップセンサの数を1つ減らすことができる。
第四実施形態の振動キャンセル装置は、図5に例示するように、第三実施形態の振動キャンセル装置において、誤差振動センサ3としてマイクロホンを用いる構成である。第四実施形態の他の部分は、第三実施形態と同様である。
第五実施形態の振動キャンセル装置は、第二実施形態又は第四実施形態の振動キャンセル装置に背景技術の騒音キャンセリングを組み合わせた構成である。第五実施形態の他の部分は、第二実施形態又は第四実施形態と同様である。
第六実施形態の振動キャンセル装置は、第一実施形態から第五実施形態において、振動センサ2、誤差振動センサ3及び参照マイクロホン102のそれぞれを複数のセンサ又は複数のマイクロホンとしたものである。
以上、本発明の実施の形態について説明したが、具体的な構成は、これらの実施の形態に限られるものではなく、本発明の趣旨を逸脱しない範囲で適宜設計の変更等があっても、本発明に含まれることはいうまでもない。
上述した各装置の各部の処理をコンピュータにより実現してもよく、この場合は各装置が有すべき機能の処理内容はプログラムによって記述される。そして、このプログラムを図7に示すコンピュータの記憶部1020に読み込ませ、演算処理部1010、入力部1030、出力部1040などに動作させることにより、上記各装置における各種の処理機能がコンピュータ上で実現される。
Claims (5)
- 座席に着席したユーザに伝達される、前記座席の外部から前記座席に到来する振動をキャンセルする振動キャンセル方法であって、
振動キャンセル部が、前記座席における、前記座席の外部の振動源に近い位置に配置された振動センサにより得られた参照信号と、前記座席における、ユーザが着席したときに頭部が置かれる位置に近い位置に配置された誤差振動センサにより得られる誤差信号と、に基づき得られたキャンセル信号を、前記ユーザが着席したときに頭部が置かれる位置に近い位置から出力することで、前記振動をキャンセルする振動キャンセルステップを含み、
前記誤差振動センサは、マイクロホンであり、
音キャンセル部が、前記座席における、ユーザが着席したときに頭部が置かれる位置に近い位置に配置された参照マイクロホンにより得られた参照信号と、前記誤差信号と、に基づき得られたキャンセル信号を、前記ユーザが着席したときに頭部が置かれる位置に近い位置から出力することで、ユーザが着席したときに頭部が置かれる位置に近い位置の音をキャンセルする音キャンセルステップを更に含む、
振動キャンセル方法。 - 請求項1の振動キャンセル方法であって、
前記振動センサ及び前記誤差振動センサのそれぞれは、複数のセンサである、
振動キャンセル方法。 - 請求項1の振動キャンセル方法であって、
前記振動センサは、前記座席の足又は背中部分に配置されており、
前記誤差振動センサは、前記座席のヘッドレストの近くに配置される、
振動キャンセル方法。 - 座席に着席したユーザに伝達される、前記座席の外部から前記座席に到来する振動をキャンセルする振動キャンセル装置であって、
前記座席における、前記座席の外部の振動源に近い位置に配置された振動センサにより得られた参照信号と、前記座席における、ユーザが着席したときに頭部が置かれる位置に近い位置に配置された誤差振動センサにより得られる誤差信号と、に基づき得られたキャンセル信号を、前記ユーザが着席したときに頭部が置かれる位置に近い位置から出力することで、前記振動をキャンセルする振動キャンセル部を含み、
前記誤差振動センサは、マイクロホンであり、
前記座席における、ユーザが着席したときに頭部が置かれる位置に近い位置に配置された参照マイクロホンにより得られた参照信号と、前記誤差信号と、に基づき得られたキャンセル信号を、前記ユーザが着席したときに頭部が置かれる位置に近い位置から出力することで、ユーザが着席したときに頭部が置かれる位置に近い位置の音をキャンセルする音キャンセル部を更に含む、
振動キャンセル装置。 - 請求項1から3の何れかの振動キャンセル方法の各処理をコンピュータに実行させるためのプログラム。
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JP3122101B2 (ja) * | 1989-08-11 | 2001-01-09 | 株式会社ブリヂストン | 振動制御装置 |
JPH05281982A (ja) * | 1992-03-31 | 1993-10-29 | Mazda Motor Corp | 振動低減装置 |
JP3355706B2 (ja) * | 1993-07-20 | 2002-12-09 | 日産自動車株式会社 | 適応制御装置 |
JP3433492B2 (ja) * | 1993-12-24 | 2003-08-04 | マツダ株式会社 | 車両のシ−ト制御装置 |
FR2732807B1 (fr) * | 1995-04-04 | 1997-05-16 | Technofirst | Procede et dispositif personnels d'attenuation acoustique active, siege equipe du dispositif correspondant, et espace a attenuation acoustique active obtenu |
JPH09281975A (ja) * | 1996-04-09 | 1997-10-31 | Mitsubishi Motors Corp | 振動騒音制御装置 |
US10347236B1 (en) * | 2018-02-28 | 2019-07-09 | Harman International Industries, Incorporated | Method and apparatus for continuously optimized road noise cancellation |
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