JP4273926B2 - 消音装置及びそれを用いたプロジェクタ装置 - Google Patents
消音装置及びそれを用いたプロジェクタ装置 Download PDFInfo
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- JP4273926B2 JP4273926B2 JP2003368300A JP2003368300A JP4273926B2 JP 4273926 B2 JP4273926 B2 JP 4273926B2 JP 2003368300 A JP2003368300 A JP 2003368300A JP 2003368300 A JP2003368300 A JP 2003368300A JP 4273926 B2 JP4273926 B2 JP 4273926B2
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- fan
- rotational speed
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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
- G10K11/16—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
-
- 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
- G10K11/1787—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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
-
- 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
- G10K2210/112—Ducts
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Exhaust Silencers (AREA)
Description
回転数M=3000、羽根枚数K=7の時は、騒音基本周波数成分NZ=350Hzとし、その高次成分(NZ×2、×3、×4、…)の騒音量が突出する。この騒音成分が可聴帯域の聴感上好ましくない場合には、耳障りに感じてしまう。
Claims (2)
- 複数の羽根から成るファンと、該ファンからの風を導く風路とを有する消音装置であって、
風路での騒音を取り込む入音手段と、
風路に音圧振動を放出するスピーカと、
前記ファンの回転数を検出する回転数検出手段と、
該回転数と前記ファンの羽根枚数とに基づく、基本及び高次の周波数を演算する周波数演算手段と、
前記周波数演算手段により演算された基本及び高次の周波数毎に、時分割で前記入音手段にて取り込んだ騒音のレベルを選択抽出して消音状態を判定する判定手段と、
前記基本及び高次の周波数毎に時分割で該周波数の位相値と振幅値を制御する増幅・位相制御手段と、
騒音の周波数成分の変動に対応する位相補正量と、該消音装置の周波数特性に対応する増幅補正量を記憶したルックアップテーブルと、
前記基本及び高次の周波数毎に時分割で前記分析手段と前記周波数演算手段と前記増幅・位相制御手段と前記ルックアップテーブルとを用いて騒音が最小になるように前記スピーカの駆動信号を生成する信号生成手段とを有し、
前記基本及び高次の周波数毎に時分割で該ルックアップテーブルを参照して前記駆動信号を補正し、前記信号生成手段で生成した駆動信号を加算して前記スピーカを駆動するようにして、ファン騒音を低減することを特徴とする消音装置。 - 光源ランプと、該光源ランプからの光を光強度変調して光学像を形成する映像表示素子と、該光学像を投射光学系で拡大して投射して表示する投射手段を有するプロジェクタ装置であって、
複数の羽根から成り、前記光源ランプを冷却する冷却ファンと、
該冷却ファンからの冷却風を前記光源ランプまで導く風路と、
前記プロジェクタ装置内部の温度を検出する温度センサと、
前記冷却ファンの回転数を制御する回転数制御回路と、
前記風路での騒音を取り込む入音手段と、
前記風路に音圧振動を放出するスピーカと、
前記冷却ファンの回転数を検出する回転数検出手段と、
該回転数と前記ファンの羽根枚数とに基づく、基本及び高次の周波数を演算する周波数演算手段と、
前記周波数演算手段により演算された基本及び高次の周波数毎に、時分割で前記入音手段にて取り込んだ騒音のレベルを選択抽出して消音状態を判定する判定手段と、
前記基本及び高次の周波数毎に時分割で該周波数の位相値と振幅値を制御する増幅・位相制御手段と、
騒音の周波数成分の変動に対応する位相補正量と該消音装置の周波数特性に対応する増幅補正量を記憶したルックアップテーブルと、
前記基本及び高次の周波数毎に時分割で前記判定手段と前記周波数演算手段と前記増幅・位相制御手段と前記ルックアップテーブルとに基づいて騒音が最小になるように前記スピーカの駆動信号を生成する信号生成手段とを有し、
前記温度センサからの温度情報に基づいて前記ファンの回転数を変更制御すると共に、前記基本及び高次の周波数毎に時分割で該ルックアップテーブルを参照して前記駆動信号を補正し、前記信号生成手段で生成した駆動信号を加算して前記スピーカを駆動するようにして、ファン騒音を低減することを特徴とするプロジェクタ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003368300A JP4273926B2 (ja) | 2003-10-29 | 2003-10-29 | 消音装置及びそれを用いたプロジェクタ装置 |
US10/824,431 US20050094823A1 (en) | 2003-10-29 | 2004-04-15 | Active noise controller and projector using the same |
CNB2004100487625A CN100412689C (zh) | 2003-10-29 | 2004-06-15 | 消音装置及使用该装置的投影仪装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003368300A JP4273926B2 (ja) | 2003-10-29 | 2003-10-29 | 消音装置及びそれを用いたプロジェクタ装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005133588A JP2005133588A (ja) | 2005-05-26 |
JP4273926B2 true JP4273926B2 (ja) | 2009-06-03 |
Family
ID=34543775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2003368300A Expired - Fee Related JP4273926B2 (ja) | 2003-10-29 | 2003-10-29 | 消音装置及びそれを用いたプロジェクタ装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20050094823A1 (ja) |
JP (1) | JP4273926B2 (ja) |
CN (1) | CN100412689C (ja) |
Cited By (1)
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KR20220064263A (ko) * | 2020-11-11 | 2022-05-18 | (주)트루시스템 | 무선 기술을 이용한 악기 연주음 감소장치 |
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- 2003-10-29 JP JP2003368300A patent/JP4273926B2/ja not_active Expired - Fee Related
-
2004
- 2004-04-15 US US10/824,431 patent/US20050094823A1/en not_active Abandoned
- 2004-06-15 CN CNB2004100487625A patent/CN100412689C/zh not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20220064263A (ko) * | 2020-11-11 | 2022-05-18 | (주)트루시스템 | 무선 기술을 이용한 악기 연주음 감소장치 |
KR102513602B1 (ko) | 2020-11-11 | 2023-03-23 | (주)트루시스템 | 무선 기술을 이용한 악기 연주음 감소장치 |
Also Published As
Publication number | Publication date |
---|---|
CN1612036A (zh) | 2005-05-04 |
US20050094823A1 (en) | 2005-05-05 |
CN100412689C (zh) | 2008-08-20 |
JP2005133588A (ja) | 2005-05-26 |
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