JP5336690B2 - 2次元エネルギー密度センサを使用するエネルギー密度制御システム - Google Patents
2次元エネルギー密度センサを使用するエネルギー密度制御システム Download PDFInfo
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- JP5336690B2 JP5336690B2 JP2005231156A JP2005231156A JP5336690B2 JP 5336690 B2 JP5336690 B2 JP 5336690B2 JP 2005231156 A JP2005231156 A JP 2005231156A JP 2005231156 A JP2005231156 A JP 2005231156A JP 5336690 B2 JP5336690 B2 JP 5336690B2
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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
- G10K11/17857—Geometric disposition, e.g. placement of microphones
-
- 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
-
- 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
-
- 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
- G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive 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
- G10K11/1787—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
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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)
Description
wi(n+1)=wi(n)−μρcvx(n)rvx(n−i)−μρcvy(n)rvy(n−i)−μp(n)rp(n−i)
110 プラント
125 処理ブロック
135 有限インパルス応答フィルタ
310 筐体
340a、340b、340c 音響アクチュエータ
330 2次元センサ
380 加算器
Claims (10)
- 筐体の閉音場内の雑音を低減する方法であって、
少なくとも1つの基準信号を受信するステップと、
2つ以下の実質的に直角に配置された音響センサの対から圧力信号を受信するステップであって、前記音響センサの対の1つはx方向にあり、前記音響センサの対のもう1つはy方向にあり、前記音響センサは、前記筐体の内面に垂直な方向における雑音粒子速度がゼロと成るように、前記筐体の前記内面に実質的に平行でおよび近接している平面に配置されているステップと、
前記x方向の音響センサの前記対からの前記圧力信号からx方向速度信号を生成するステップと、
前記y方向の音響センサの前記対からの前記圧力信号からy方向速度信号を生成するステップと、
前記筐体の前記閉音場内の前記音響センサの位置における音響エネルギー密度を最小化するように、出力信号を生成するために、前記x方向速度信号、前記y方向速度信号および前記基準信号を使用するステップと、
前記出力信号を音響アクチュエータに送信するステップと
を備えることを特徴とする方法。 - 1つまたは複数の前記受信した圧力信号から平均圧力信号を生成するステップをさらに含むことを特徴とする請求項1に記載の方法。
- 前記基準信号に制御フィルタ係数を適用して前記出力信号を生成するステップをさらに含むことを特徴とする請求項1に記載の方法。
- フィルタード−X信号を生成するために、前記基準信号にシステム識別フィルタを適用するステップをさらに備えたことを特徴とする請求項1に記載の方法。
- 前記制御フィルタ係数は、前記x方向速度信号、前記y方向速度信号および前記少なくとも1つの基準信号から生成されたフィルタード−X信号から更新されることを特徴とする請求項3に記載の方法。
- 筐体の閉音場内の雑音を低減するシステムであって、
音響アクチュエータと、
2つ以下の実質的に直角に配置された音響センサの対を含むセンサ装置であって、前記音響センサの対の1つはx方向にあり、前記音響センサの対のもう1つはy方向にあり、前記音響センサは、前記筐体の内面に垂直な方向における粒子速度の速度成分がセロと成るように、前記筐体の前記内面に実質的に平行でおよび近接している平面に配置されるセンサ装置と、
前記音響アクチュエータおよび前記センサ装置と通信するコントローラであって、
基準信号を受信し、
前記音響センサからの圧力信号を受信し、
前記x方向の音響センサの前記対からの前記圧力信号からx方向速度信号を生成し、
前記y方向の音響センサの前記対からの前記圧力信号からy方向速度信号を生成し、
前記筐体の前記閉音場内の前記センサ装置の位置における音響エネルギー密度を最小化するように、出力信号を生成するために前記x方向速度信号、前記y方向速度信号および前記基準信号を使用し、
前記出力信号を前記音響アクチュエータに送信するように動作可能なコントローラと
を備えたことを特徴とするシステム。 - 前記コントローラは、1つまたは複数の前記受信した圧力信号から平均圧力信号を生成するようさらに動作可能であることを特徴とする請求項6に記載のシステム。
- 前記コントローラは、前記出力信号を生成するために前記基準信号に制御フィルタ係数を適用するようさらに動作可能であることを特徴とする請求項6に記載のシステム。
- 前記コントローラは、前記基準信号にシステム識別フィルタを適用してフィルタード−X信号を生成するようさらに動作可能であることを特徴とする請求項6に記載のシステム。
- 前記制御フィルタ係数は、前記x方向速度信号、前記y方向速度信号および前記基準信号から生成されたフィルタード−X信号から更新されることを特徴とする請求項8に記載のシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/913,312 US7327849B2 (en) | 2004-08-09 | 2004-08-09 | Energy density control system using a two-dimensional energy density sensor |
US10/913,312 | 2004-08-09 |
Publications (3)
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JP2006065324A JP2006065324A (ja) | 2006-03-09 |
JP2006065324A5 JP2006065324A5 (ja) | 2008-09-25 |
JP5336690B2 true JP5336690B2 (ja) | 2013-11-06 |
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JP2005231156A Active JP5336690B2 (ja) | 2004-08-09 | 2005-08-09 | 2次元エネルギー密度センサを使用するエネルギー密度制御システム |
Country Status (4)
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US (1) | US7327849B2 (ja) |
JP (1) | JP5336690B2 (ja) |
DE (1) | DE102005037034B4 (ja) |
GB (1) | GB2417156B (ja) |
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US8270625B2 (en) * | 2006-12-06 | 2012-09-18 | Brigham Young University | Secondary path modeling for active noise control |
JP5156934B2 (ja) * | 2008-03-07 | 2013-03-06 | 学校法人日本大学 | 音響測定装置 |
JP5093702B2 (ja) * | 2008-06-20 | 2012-12-12 | 学校法人日本大学 | 音響エネルギ計測装置並びにこれを用いた音響性能評価装置及び音響情報計測装置 |
US8638956B2 (en) * | 2009-08-06 | 2014-01-28 | Ken K. Deng | Acoustic velocity microphone using a buoyant object |
WO2012000092A1 (en) * | 2010-06-28 | 2012-01-05 | Lionstone Capital Corporation | Seamless end-to-end data obfuscation and encryption |
US10603633B2 (en) * | 2012-02-24 | 2020-03-31 | Corning Incorporated | Honeycomb structure comprising a cement skin composition with crystalline inorganic fibrous material |
EP2826264A1 (en) * | 2012-03-14 | 2015-01-21 | Bang & Olufsen A/S | A method of applying a combined or hybrid sound -field control strategy |
JP6689241B2 (ja) | 2017-09-15 | 2020-04-28 | 株式会社東芝 | 騒音低減装置、飛行体、発電装置、騒音低減方法及び騒音低減プログラム |
GB201804129D0 (en) * | 2017-12-15 | 2018-05-02 | Cirrus Logic Int Semiconductor Ltd | Proximity sensing |
WO2019127403A1 (en) * | 2017-12-29 | 2019-07-04 | Intel IP Corporation | Methods of frequency domain intra-orthogonal frequency-division multiplexing (ofdm) symbol multi rx-beam measurement and dynamic rx beam sweeping |
CN108847250B (zh) * | 2018-07-11 | 2020-10-02 | 会听声学科技(北京)有限公司 | 一种定向降噪方法、系统及耳机 |
CN112071298A (zh) * | 2020-09-08 | 2020-12-11 | 珠海格力电器股份有限公司 | 油烟机降噪控制方法、系统及油烟机 |
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- 2005-07-27 GB GB0515390A patent/GB2417156B/en active Active
- 2005-08-05 DE DE102005037034.9A patent/DE102005037034B4/de active Active
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DE102005037034B4 (de) | 2018-10-04 |
GB2417156B (en) | 2008-01-16 |
US20060029233A1 (en) | 2006-02-09 |
GB2417156A (en) | 2006-02-15 |
GB0515390D0 (en) | 2005-08-31 |
US7327849B2 (en) | 2008-02-05 |
DE102005037034A1 (de) | 2006-03-23 |
JP2006065324A (ja) | 2006-03-09 |
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