JP5709760B2 - オーディオノイズキャンセリング - Google Patents
オーディオノイズキャンセリング Download PDFInfo
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- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- 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
- G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- 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
- G10K11/1781—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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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- 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
- G10K11/1785—Methods, e.g. algorithms; Devices
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- 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
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17861—Methods, e.g. algorithms; Devices using additional means for damping sound, e.g. using sound absorbing panels
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- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- 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
- G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G10L21/0232—Processing in the frequency domain
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3056—Variable gain
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- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- General Health & Medical Sciences (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
−通常の使用
−ヘッドホンをユーザの耳に強く押しつけた場合
−ヘッドホンをテーブルに置いた(不使用の)場合
−ヘッドホンとユーザの頭の間に少しリークがある場合。
Claims (14)
- ノイズキャンセリングシステムであって、
オーディオ環境におけるサウンドを表すキャプチャした信号を発生するマイクロホンと、
前記オーディオ環境においてサウンドキャンセリングオーディオ信号を放射するサウンドトランスデューサと、
前記マイクロホンから前記サウンドトランスデューサまでのフィードバック手段であって、前記キャプチャした信号を受け取り、前記サウンドトランスデューサ用駆動信号を生成し、非適応的キャンセリングフィルタと可変ゲインを含む、前記フィードバック手段と、
前記マイクロホンと前記フィードバック手段と前記サウンドトランスデューサとを含むフィードバックループのうち、前記非適応的キャンセリングフィルタと前記可変ゲインを含まない二次的経路の二次的経路ゲインを決定するゲイン決定手段と、
前記二次的経路ゲインに応じて前記可変ゲインのゲインを調節するゲイン設定手段とを有し、
前記ゲイン決定手段は、
前記フィードバックループにテスト信号を注入する手段と、
前記二次的経路の入力において、前記テスト信号に対応する第1の信号レベルを決定する手段と、
前記二次的経路の出力において、前記テスト信号に対応する第2の信号レベルを決定する手段と、
前記第1の信号レベルと前記第2の信号レベルに応じて前記二次的経路ゲインを決定する手段とを有する、
ノイズキャンセリングシステム。 - 前記二次的経路の前記出力は、前記可変ゲインの入力と、前記非適応的キャンセリングフィルタの入力の少なくとも一方に対応する、請求項1に記載のノイズキャンセリングシステム。
- 前記第1の信号レベルを決定する手段は、前記テスト信号の信号レベルに応じて、前記フィードバックループの信号を測定せずに、前記第1の信号レベルを決定するように構成されている、請求項1に記載のノイズキャンセリングシステム。
- 前記テスト信号は10Hzより小さい3dB帯域幅を有する狭帯域信号である、請求項1に記載のノイズキャンセリングシステム。
- 前記テスト信号は実質的にシヌソイドである、請求項1に記載のノイズキャンセリングシステム。
- 前記テスト信号は10Hzないし40Hzの区間内に中心周波数を有する、請求項1に記載のノイズキャンセリングシステム。
- 前記テスト信号はノイズ信号である、請求項1に記載のノイズキャンセリングシステム。
- 前記テスト信号がないとき、前記二次的経路の入力に対応する信号の第3の信号レベルを測定する手段と、
前記第3の信号レベルに応じて前記テスト信号の信号レベルを設定する手段とをさらに有する、請求項1に記載のノイズキャンセリングシステム。 - 前記非適応的キャンセリングフィルタによる前記テスト信号に対応する信号成分の減衰は少なくとも6dBである、請求項1に記載のノイズキャンセリングシステム。
- 前記テスト信号は前記サウンドトランスデューサに入力するユーザオーディオ信号である、請求項1に記載のノイズキャンセリングシステム。
- 前記ゲイン設定手段は、前記二次的経路ゲインと前記可変ゲインの前記ゲインの合成ゲインが所定値を有するように、前記可変ゲインの前記ゲインを設定するように構成されている、請求項1に記載のノイズキャンセリングシステム。
- 前記二次的経路は、前記サウンドトランスデューサから前記マイクロホンへの音響経路を有する、請求項1に記載のノイズキャンセリングシステム。
- 前記二次的経路はデジタルセクションを有し、前記二次的経路は、アナログ・デジタル・コンバータとデジタル・アナログ・コンバータのうち少なくとも一方を有する、請求項1に記載のノイズキャンセリングシステム。
- ノイズキャンセリングシステムの動作方法であって、
オーディオ環境におけるサウンドを表すキャプチャした信号を発生するマイクロホンと、
前記オーディオ環境においてサウンドキャンセリングオーディオ信号を放射するサウンドトランスデューサと、
前記マイクロホンから前記サウンドトランスデューサへのフィードバック手段であって、前記キャプチャした信号を受け取り、前記サウンドトランスデューサ用駆動信号を生成し、非適応的キャンセリングフィルタと可変ゲインを有する、前記フィードバック手段と、を有し、
前記方法は、
前記マイクロホンと前記フィードバック手段と前記サウンドトランスデューサとを含むフィードバックループのうち、前記非適応的キャンセリングフィルタと前記可変ゲインを含まない二次的経路の二次的経路ゲインを決定する段階と、
前記二次的経路ゲインに応じて前記可変ゲインのゲインを調節する段階とを有し、
前記二次的経路ゲインを決定する段階は、
前記フィードバックループにテスト信号を注入する段階と、
前記二次的経路の入力において前記テスト信号に対応する第1の信号レベルを決定する段階と、
前記二次的経路の出力において前記テスト信号に対応する第2の信号レベルを決定する段階と、
前記第1の信号レベルと前記第2の信号レベルに応じて前記二次的経路ゲインを決定する段階とを有する
方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08172126 | 2008-12-18 | ||
EP08172126.8 | 2008-12-18 | ||
PCT/IB2009/055686 WO2010070561A1 (en) | 2008-12-18 | 2009-12-11 | Active audio noise cancelling |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2012513035A JP2012513035A (ja) | 2012-06-07 |
JP5709760B2 true JP5709760B2 (ja) | 2015-04-30 |
Family
ID=42035923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011541678A Active JP5709760B2 (ja) | 2008-12-18 | 2009-12-11 | オーディオノイズキャンセリング |
Country Status (8)
Country | Link |
---|---|
US (1) | US8948410B2 (ja) |
EP (1) | EP2380163B1 (ja) |
JP (1) | JP5709760B2 (ja) |
KR (1) | KR101625361B1 (ja) |
CN (1) | CN102257560B (ja) |
RU (1) | RU2545384C2 (ja) |
TR (1) | TR201905080T4 (ja) |
WO (1) | WO2010070561A1 (ja) |
Families Citing this family (74)
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JP2012169828A (ja) * | 2011-02-14 | 2012-09-06 | Sony Corp | 音声信号出力装置、スピーカ装置、音声信号出力方法 |
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