JP7413327B2 - 音発生装置及び翼騒音低減装置 - Google Patents
音発生装置及び翼騒音低減装置 Download PDFInfo
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Classifications
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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
- G10K11/17821—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
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- 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
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
-
- 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
- G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
- G10K11/04—Acoustic filters ; Acoustic resonators
-
- 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
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
-
- 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
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- 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
-
- 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
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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
- G10K2210/10—Applications
- G10K2210/121—Rotating machines, e.g. engines, turbines, motors; Periodic or quasi-periodic signals in general
-
- 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
- G10K2210/3026—Feedback
-
- 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
- G10K2210/3027—Feedforward
-
- 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
- G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
-
- 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
- G10K2210/3044—Phase shift, e.g. complex envelope processing
Description
次に、中空管102の設計方法について説明する。
例えば、半径Raはファン200の半径を1.1倍したものとする。なお、半径Raはファン200の半径に近いほど好ましい。(D1+D2)に制約はないが、例えば、(D1+D2)は半径Raの5%から20%とする(0.05<(D1+D2)/Ra<0.2)。
例えば、ステップAで決定したLa及びステップBで決定したRa、(D1+D2)を上記式(3)、(4)に代入することにより巻き付け角度θ0を決定する。
例えば、ステップAで決定したLa、ステップBで決定したRa、(D1+D2)、及びステップCで決定した巻き付け角度θ0を上記式(2)に代入することによりNaを求め、求めたNaを四捨五入することにより巻き付け数Naを決定する。
例えば、ステップBで決定した(D1+D2)を分配することにより直径D1、D2を決定する。なお、円環部材110の内部に音波供給源が配置されることから、直径D1は小型スピーカが設置できる程度のサイズとする。
次に、中空管102の開口104の設計方法について説明する。
次に、音波供給源106の配置について説明する。
図1に示す例では、音発生装置100は1つの中空管102を備える。音発生装置100は2つの中空管102を備えていてもよい。
図1に示す例では、開口104はファン200の方向に向けて(中空管102-1の内周側に)設けられている。開口104は別の方向に向けて設けられていてもよい。
ロブモードを分離して集音する方法について説明する。
次に、実施形態に係る音発生装置を翼騒音低減に適用する例について説明する。
fi=BxΩ/2π
ここで、Bは翼枚数であり、Ωは翼回転速度[rad/s]であり、xはロブモードの次数である。
実施形態に係る翼騒音低減装置は、音発生装置とともにパッシブ吸音器を使用してもよい。
中空管102はらせん中空管に限定されない。図30は、中心(ファン200)から見た音発生装置100の一部を概略的に示している。図30に示すように、中空管102は折り返しで蛇行する中空管であってもよい。折り返し部分で音波の反射が生じるため、カーブの曲率はできる限り小さくする。
Claims (10)
- 全体形状が円環状であり、円周方向にらせん状に延在し、複数の開口を有する第1のらせん中空管と、
前記第1のらせん中空管に接続され、前記第1のらせん中空管に音波を供給する3個以上の音波供給源と、
を備える音発生装置。 - 前記第1のらせん中空管を支持する円環状又は楕円状の支持部材をさらに備え、
前記第1のらせん中空管は前記支持部材にらせん状に巻回されている、
請求項1に記載の音発生装置。 - 前記3個以上の音波供給源は前記支持部材の内部に設けられている、
請求項2に記載の音発生装置。 - 前記第1のらせん中空管を覆うカバーをさらに備える請求項1乃至3のいずれか1項に記載の音発生装置。
- 前記開口はヘルムホルツ共鳴を生じさせる寸法を有する、
請求項1乃至4のいずれか1項に記載の音発生装置。 - 前記3個以上の音波供給源は2M+1個以上の音波供給源を含み、Mは騒音低減対象であるロブモードの次数を表す、
請求項1乃至5のいずれか1項に記載の音発生装置。 - 前記3個以上の音波供給源は3M個の音波供給源であり、前記3M個の音波供給源は3M/2個のスピーカにより実施される、
請求項6に記載の音発生装置。 - 前記第1のらせん中空管は、騒音低減対象となる周波数に依存する管路長を有する、
請求項1乃至7のいずれか1項に記載の音発生装置。 - 全体形状が円環状であり、前記円周方向にらせん状に延在し、複数の開口を有する第2のらせん中空管をさらに備え、
前記第1のらせん中空管及び前記第2のらせん中空管は二重らせん構造を有する、
請求項1乃至8のいずれか1項に記載の音発生装置。 - 請求項1乃至9のいずれか1項に記載の音発生装置と、
音を電気信号に変換する変換器と、
前記変換器の出力に基づいて前記音波供給源を駆動する制御回路と、
を備える翼騒音低減装置。
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JP2021145266A JP7413327B2 (ja) | 2021-09-07 | 2021-09-07 | 音発生装置及び翼騒音低減装置 |
US17/651,085 US11798525B2 (en) | 2021-09-07 | 2022-02-15 | Sound emitting apparatus and blade noise reduction apparatus |
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Citations (2)
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JP2015179118A (ja) | 2014-03-18 | 2015-10-08 | 株式会社東芝 | スピーカシステム |
WO2017169886A1 (ja) | 2016-03-31 | 2017-10-05 | ソニー株式会社 | 音響管および音響再生装置 |
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JP3876011B2 (ja) | 1995-08-11 | 2007-01-31 | オリエンタルモーター株式会社 | ファン装置 |
JPH10169599A (ja) | 1996-12-11 | 1998-06-23 | Oriental Motor Co Ltd | ファン装置 |
JP4195751B2 (ja) | 1999-03-25 | 2008-12-10 | オリエンタルモーター株式会社 | 消音装置 |
JP2001054181A (ja) | 1999-08-09 | 2001-02-23 | Kansai Tlo Kk | 膜発音器及び残響調節装置 |
US7584820B2 (en) * | 2004-03-19 | 2009-09-08 | Bose Corporation | Acoustic radiating |
JP4295238B2 (ja) | 2005-04-01 | 2009-07-15 | 日本碍子株式会社 | 圧電音響発生装置 |
JP5215797B2 (ja) | 2008-09-26 | 2013-06-19 | パナソニック株式会社 | スピーカー機能付き建築用パネル |
JP2011244030A (ja) | 2010-05-14 | 2011-12-01 | Nippon Telegr & Teleph Corp <Ntt> | 音響再生装置 |
JP6593741B2 (ja) | 2014-04-30 | 2019-10-23 | パナソニックIpマネジメント株式会社 | スピーカシステム |
WO2017068575A1 (en) * | 2015-10-21 | 2017-04-27 | Micronoise Ltd | Noise reductions device |
JPWO2017090311A1 (ja) | 2015-11-25 | 2018-09-06 | ソニー株式会社 | 集音装置 |
JP6761277B2 (ja) | 2016-05-13 | 2020-09-23 | 株式会社東芝 | スピーカシステム |
JP6928791B2 (ja) | 2016-06-30 | 2021-09-01 | パナソニックIpマネジメント株式会社 | 振動ドライバ |
JP6503135B1 (ja) | 2018-12-19 | 2019-04-17 | 英男 大島 | 弦楽器励振装置および弦楽器励振システム |
US11721314B2 (en) * | 2020-07-14 | 2023-08-08 | Acoustic Metamaterials LLC | Methods and systems for modifying acoustics of a loudspeaker back enclosure using active noise control |
JP3231067U (ja) | 2020-12-28 | 2021-03-11 | 顯 原岡 | 多機能チューブホン |
JP7467377B2 (ja) | 2021-03-17 | 2024-04-15 | 株式会社東芝 | 音発生装置及び翼騒音低減装置 |
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JP2015179118A (ja) | 2014-03-18 | 2015-10-08 | 株式会社東芝 | スピーカシステム |
WO2017169886A1 (ja) | 2016-03-31 | 2017-10-05 | ソニー株式会社 | 音響管および音響再生装置 |
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