JP5342063B2 - アクティブノイズリダクション適応フィルタリング - Google Patents
アクティブノイズリダクション適応フィルタリング Download PDFInfo
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- JP5342063B2 JP5342063B2 JP2012500803A JP2012500803A JP5342063B2 JP 5342063 B2 JP5342063 B2 JP 5342063B2 JP 2012500803 A JP2012500803 A JP 2012500803A JP 2012500803 A JP2012500803 A JP 2012500803A JP 5342063 B2 JP5342063 B2 JP 5342063B2
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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
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
-
- 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
- G10K11/17821—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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- 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
- G10K11/1783—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
- G10K11/17833—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions by using a self-diagnostic function or a malfunction prevention function, e.g. detecting abnormal output levels
-
- 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
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
-
- 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
- G10K11/1787—General system configurations
- G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
-
- 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
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1282—Automobiles
-
- 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
- G10K2210/50—Miscellaneous
- G10K2210/503—Diagnostics; Stability; Alarms; Failsafe
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Noise Elimination (AREA)
Description
14 コンバイナ部
16 適応フィルタ部
18 漏れ調整部
19 ノイズリダクション基準信号生成部
20 係数算出部
22 フィルタ部
22’ 車室フィルタ部
23,23’ フィルタ部
24 入力変換部
24’ 追加の入力変換部
24” マイクロフォン部
25,25’ フィルタ部
26 電力増幅部
28 出力変換部
28’ 音響駆動部
30 増幅部
37 制御部
38 通信経路
40 信号線
102 ノイズ信号調整部
Claims (12)
- 車両室内の音響ノイズを低減するためのフィード−フォワード型アクティブノイズリダクションシステムを備えた装置であって、
前記フィード−フォワード型アクティブノイズリダクションシステムは、
それぞれの場の音響ノイズを、第1周波数範囲を有した複数の誤り信号に変換する入力変換部と、
第1周波数範囲の制限部分を含む第2周波数範囲にかかる前記各誤り信号の振幅を求める決定回路と、
前記第2周波数範囲の前記各誤り信号の振幅を、第1しきい値と比較する比較回路と、
前記第2周波数範囲の前記誤り信号の振幅が前記第1しきい値を超える前記誤り信号のいずれかを修正する修正回路と
を具備することを特徴とする装置。 - 前記第1周波数範囲にかかる前記誤り信号それぞれの振幅を求める決定回路と、
前記第1周波数範囲の前記誤り信号それぞれの振幅を、第2しきい値と比較する比較回路と、
前記第2周波数範囲の前記誤り信号の振幅が前記第1しきい値を超えるか、又は、前記第1周波数範囲の前記誤り信号の振幅が前記第2しきい値を超える前記誤り信号のいずれかを修正する修正回路と
をさらに具備することを特徴とする請求項1に記載の装置。 - 前記誤り信号を修正する修正回路が、
前記誤り信号に適用されるゲインを修正するゲイン修正回路を具備することを特徴とする請求項1又は2に記載の装置。 - 前記誤り信号それぞれをフィルタリングして、複数の低域通過フィルタリング済誤り信号を提供する低域通過フィルタ部と、
前記低域通過フィルタリング済誤り信号を、前記第2周波数範囲の前記誤り信号を比較する比較回路に提供する提供回路と
をさらに具備することを特徴とする請求項1ないし3のいずれか1項に記載の装置。 - 前記誤り信号それぞれをフィルタリングして、複数の帯域通過フィルタリング済誤り信号を提供する帯域通過フィルタ部と、
前記帯域通過フィルタリング済誤り信号を、前記第2周波数範囲の前記誤り信号を比較する比較回路に提供する提供回路と
をさらに具備することを特徴とする請求項1ないし4のいずれか1項に記載の装置。 - 前記第1しきい値が、前記第2しきい値とは異なる値をとることを特徴とする請求項2ないし5のいずれか1項に記載の装置。
- 車両室内の音響ノイズを低減するためのフィード−フォワード型アクティブノイズリダクションシステムの動作方法であって、
前記車両室内の音響ノイズを、第1周波数範囲を有した複数の誤り信号に変換する段階と、
第1周波数範囲の制限部分を含む第2周波数範囲にかかる前記誤り信号それぞれの振幅を求める段階と、
前記第2周波数範囲の前記誤り信号それぞれの振幅を、第1しきい値と比較する段階と、
前記第2周波数範囲の前記誤り信号のいずれかの振幅が前記第1しきい値を超える場合、前記誤り信号を修正する段階と
を有することを特徴とする方法。 - 前記第1周波数範囲にかかる前記誤り信号それぞれの振幅を求める段階と、
前記第1周波数範囲の前記誤り信号それぞれの振幅を、第2しきい値と比較する段階と、
前記第2周波数範囲の前記誤り信号のいずれかの振幅が前記第1しきい値を超える場合、又は、前記第1周波数範囲の前記誤り信号のいずれかの振幅が前記第2しきい値を超える場合、前記誤り信号を修正する段階と
をさらに有することを特徴とする請求項7に記載の方法。 - 前記誤り信号を修正する段階が、前記誤り信号に適用されるゲインを修正する段階を含むことを特徴とする請求項7又は8に記載の方法。
- 前記第2周波数範囲の前記誤り信号を比較する段階の前に、前記誤り信号それぞれに低域通過フィルタリングを行う段階をさらに有することを特徴とする請求項7ないし9のいずれか1項に記載の方法。
- 前記第2周波数範囲の前記誤り信号を比較する段階の前に、前記誤り信号それぞれに帯域通過フィルタリングを行う段階をさらに有することを特徴とする請求項7ないし10のいずれか1項に記載の方法。
- 前記第1しきい値が、前記第2しきい値とは異なる値をとることを特徴とする請求項8ないし11のいずれか1項に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/408,441 | 2009-03-20 | ||
US12/408,441 US8335318B2 (en) | 2009-03-20 | 2009-03-20 | Active noise reduction adaptive filtering |
PCT/US2010/023529 WO2010107528A2 (en) | 2009-03-20 | 2010-02-09 | Active noise reduction adaptive filtering |
Publications (2)
Publication Number | Publication Date |
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JP2012521020A JP2012521020A (ja) | 2012-09-10 |
JP5342063B2 true JP5342063B2 (ja) | 2013-11-13 |
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Application Number | Title | Priority Date | Filing Date |
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JP2012500803A Active JP5342063B2 (ja) | 2009-03-20 | 2010-02-09 | アクティブノイズリダクション適応フィルタリング |
Country Status (6)
Country | Link |
---|---|
US (1) | US8335318B2 (ja) |
EP (1) | EP2409297B1 (ja) |
JP (1) | JP5342063B2 (ja) |
CN (1) | CN102356426B (ja) |
HK (1) | HK1167203A1 (ja) |
WO (1) | WO2010107528A2 (ja) |
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2009
- 2009-03-20 US US12/408,441 patent/US8335318B2/en active Active
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2010
- 2010-02-09 CN CN201080012470.XA patent/CN102356426B/zh active Active
- 2010-02-09 JP JP2012500803A patent/JP5342063B2/ja active Active
- 2010-02-09 WO PCT/US2010/023529 patent/WO2010107528A2/en active Application Filing
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CN102356426B (zh) | 2014-12-03 |
WO2010107528A2 (en) | 2010-09-23 |
EP2409297B1 (en) | 2019-01-23 |
WO2010107528A3 (en) | 2011-04-07 |
HK1167203A1 (en) | 2012-11-23 |
US8335318B2 (en) | 2012-12-18 |
US20100239105A1 (en) | 2010-09-23 |
JP2012521020A (ja) | 2012-09-10 |
CN102356426A (zh) | 2012-02-15 |
EP2409297A2 (en) | 2012-01-25 |
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