JP5189307B2 - 能動型騒音制御装置 - Google Patents
能動型騒音制御装置 Download PDFInfo
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- JP5189307B2 JP5189307B2 JP2007094503A JP2007094503A JP5189307B2 JP 5189307 B2 JP5189307 B2 JP 5189307B2 JP 2007094503 A JP2007094503 A JP 2007094503A JP 2007094503 A JP2007094503 A JP 2007094503A JP 5189307 B2 JP5189307 B2 JP 5189307B2
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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
- G10K11/17825—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
- G10K11/1781—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
- G10K11/1785—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
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17855—Methods, e.g. algorithms; Devices for improving speed or power requirements
-
- 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
- G10K2210/128—Vehicles
- G10K2210/1282—Automobiles
Description
14…車室 16a、16b、16c…腹部分
18、30、32、34、40、42…マイクロフォン
19…タイヤ 20…ANC用電子制御装置
21…路面 22、44…スピーカ
24…前座席 26…ヘッドレスト
28…ルーフ 38…トランクルーム
43…リアトレイ 50…第1制御回路部
52…マイクロコンピュータ 54…遅延フィルタ
56、170…加算器 58…エコーキャンセル部
59…ADC 60…減算器
62…第1フィルタ 64…第2フィルタ
65…DAC 66、68…LPF
72…BPF 100…制御手段
150…第2制御回路部 152…周波数検出回路
154…基準信号生成手段 156…参照信号生成手段
158…適応フィルタ 160…フィルタ係数更新手段
162…エンジン 164…ECU
Claims (6)
- 車室内の騒音を相殺するための制御信号を生成する制御手段と、前記制御信号を前記騒音の相殺音として前記車室内に出力する音出力手段と、前記騒音と前記相殺音との相殺誤差音を相殺誤差信号として前記制御手段に出力する相殺誤差信号検出手段とを有する能動型騒音制御装置において、
前記車室内の騒音は、前記車室の共鳴特性から定まる所定の共鳴周波数を中心周波数とする非周期性のロードノイズと、車両のエンジン回転数に依存する周期性のエンジン騒音とであり、
前記制御手段は、
前記相殺誤差信号をアナログ信号からデジタル信号に変換するAD変換部と、
前記音出力手段と前記相殺誤差信号検出手段との間の伝達特性に対応する補正値に基づいて前記ロードノイズを相殺するための第1制御信号を補正してデジタル信号のエコーキャンセル信号を生成するエコーキャンセル部と、
前記デジタル信号に変換された前記相殺誤差信号から前記エコーキャンセル信号を減算して第1基準信号を生成する減算器と、
前記共鳴周波数の1/4周期に相当する時間だけ前記第1基準信号を遅延させて第2基準信号を生成する遅延フィルタと、
前記第1基準信号と前記第2基準信号とを合成して前記第1制御信号を生成する第1加算器と、
前記車両のエンジンから発生する振動騒音の周波数に基づく所定の制御周波数の第3基準信号を生成する基準信号生成手段と、
前記補正値に基づいて前記第3基準信号を補正し参照信号を生成する参照信号生成手段と、
前記第3基準信号に基づいて、前記エンジン騒音を相殺するための第2制御信号を生成する適応フィルタと、
前記第1基準信号と前記参照信号とに基づいて、前記第1基準信号が最小となるように前記適応フィルタのフィルタ係数を逐次更新するフィルタ係数更新手段と、
前記第1制御信号と前記第2制御信号とを加算して第3制御信号を生成する第2加算器と、
前記第3制御信号をデジタル信号からアナログ信号に変換して前記音出力手段に出力するDA変換部と、
を有し、
前記音出力手段は、前記第3制御信号を前記ロードノイズ及び前記エンジン騒音を相殺するための相殺音として前記車室内に出力する
ことを特徴とする能動型騒音制御装置。 - 請求項1記載の能動型騒音制御装置において、
前記制御手段は、前記第1基準信号を補正して第1補正信号を生成する第1フィルタと、前記第2基準信号を補正して第2補正信号を生成する第2フィルタとをさらに有し、
前記第1加算器は、前記第1補正信号と前記第2補正信号とを合成して前記第1制御信号を生成する
ことを特徴とする能動型騒音制御装置。 - 請求項1又は2記載の能動型騒音制御装置において、
前記適応フィルタは、適応ノッチフィルタである
ことを特徴とする能動型騒音制御装置。 - 請求項1〜3のいずれか1項に記載の能動型騒音制御装置において、
前記相殺誤差信号のうち、所定周波数以下の信号のみを通過させて前記AD変換部に出力するアンチエイリアシングフィルタをさらに有し、
前記所定周波数は、前記第3制御信号の制御周波数よりも高い周波数である
ことを特徴とする能動型騒音制御装置。 - 請求項1〜4のいずれか1項に記載の能動型騒音制御装置において、
前記DA変換部からの前記第3制御信号に含まれる高周波成分を除去し、該高周波成分が除去された前記第3制御信号を前記音出力手段に出力するリコンストラクションフィルタをさらに有し、
前記高周波成分は、前記第3制御信号の制御周波数よりも高い周波数の信号成分である
ことを特徴とする能動型騒音制御装置。 - 請求項1〜5のいずれか1項に記載の能動型騒音制御装置において、
前記相殺誤差信号のうち、前記第3制御信号の制御周波数を中心周波数とする所定の周波数帯域の信号のみを通過させて前記AD変換部に出力するバンドパスフィルタをさらに有する
ことを特徴とする能動型騒音制御装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2007094503A JP5189307B2 (ja) | 2007-03-30 | 2007-03-30 | 能動型騒音制御装置 |
US12/058,094 US8098837B2 (en) | 2007-03-30 | 2008-03-28 | Active noise control apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2007094503A JP5189307B2 (ja) | 2007-03-30 | 2007-03-30 | 能動型騒音制御装置 |
Publications (2)
Publication Number | Publication Date |
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JP2008247342A JP2008247342A (ja) | 2008-10-16 |
JP5189307B2 true JP5189307B2 (ja) | 2013-04-24 |
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JP2007094503A Expired - Fee Related JP5189307B2 (ja) | 2007-03-30 | 2007-03-30 | 能動型騒音制御装置 |
Country Status (2)
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US (1) | US8098837B2 (ja) |
JP (1) | JP5189307B2 (ja) |
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-
2007
- 2007-03-30 JP JP2007094503A patent/JP5189307B2/ja not_active Expired - Fee Related
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2008
- 2008-03-28 US US12/058,094 patent/US8098837B2/en not_active Expired - Fee Related
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US20080240457A1 (en) | 2008-10-02 |
US8098837B2 (en) | 2012-01-17 |
JP2008247342A (ja) | 2008-10-16 |
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