JP2009045955A - 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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- JP2009045955A JP2009045955A JP2007210921A JP2007210921A JP2009045955A JP 2009045955 A JP2009045955 A JP 2009045955A JP 2007210921 A JP2007210921 A JP 2007210921A JP 2007210921 A JP2007210921 A JP 2007210921A JP 2009045955 A JP2009045955 A JP 2009045955A
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- 230000005236 sound signal Effects 0.000 claims abstract description 38
- 230000003044 adaptive effect Effects 0.000 claims abstract description 32
- 238000000605 extraction Methods 0.000 claims description 23
- 238000012937 correction Methods 0.000 claims description 11
- 239000000284 extract Substances 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002945 steepest descent method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
【解決手段】適応ノッチフィルタ113により、オーディオ信号Saから、ロードノイズの制御周波数fdを中心周波数として成分を抽出し抽出信号Sadを生成し、遅延器202により抽出信号Sadの位相を遅延した遅延抽出信号Sadφを出力し、減算器115により誤差信号e1(ロードノイズと相殺音の合成音+楽音)から遅延抽出信号Sadφ(楽音)を減算して補正誤差信号e2(合成音のみ)を生成する。車室内空間104でオーディオ信号Saに基づく楽音をそのまま聴くことができる。
【選択図】図1
Description
112…能動型騒音制御器
113…適応ノッチフィルタ
118…能動型騒音制御ユニット(ANCユニット)
120…オーディオユニット
202…遅延器
Claims (1)
- ロードノイズと、オーディオ信号に基づく音出力器からの楽音と、制御信号に基づく前記音出力器からの前記ロードノイズの相殺音と、の混合音を検出し誤差信号として出力する音検出器と、
前記オーディオ信号から、前記ロードノイズの制御周波数を中心周波数として成分を抽出し、抽出信号を生成する適応ノッチフィルタと、
前記抽出信号の位相を遅延した遅延抽出信号を出力する遅延器と、
前記誤差信号から前記遅延抽出信号を減算して補正誤差信号を生成する減算器と、
前記補正誤差信号と前記ロードノイズに関する基準信号とに基づいて前記制御信号を生成する能動型騒音制御器と、
を備えることを特徴とする能動型騒音制御装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2007210921A JP4977551B2 (ja) | 2007-08-13 | 2007-08-13 | 能動型騒音制御装置 |
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JP2007210921A JP4977551B2 (ja) | 2007-08-13 | 2007-08-13 | 能動型騒音制御装置 |
Publications (2)
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JP2009045955A true JP2009045955A (ja) | 2009-03-05 |
JP4977551B2 JP4977551B2 (ja) | 2012-07-18 |
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JP2007210921A Expired - Fee Related JP4977551B2 (ja) | 2007-08-13 | 2007-08-13 | 能動型騒音制御装置 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011175113A (ja) * | 2010-02-24 | 2011-09-08 | Kyocera Corp | 電子機器 |
EP2551846A1 (en) * | 2011-07-26 | 2013-01-30 | AKG Acoustics GmbH | Noise reducing sound reproduction |
EP2782093A2 (en) | 2013-03-21 | 2014-09-24 | Honda Motor Co., Ltd. | Vehicular active vibrational noise control apparatus |
US9491537B2 (en) | 2011-07-26 | 2016-11-08 | Harman Becker Automotive Systems Gmbh | Noise reducing sound reproduction system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005004013A (ja) * | 2003-06-12 | 2005-01-06 | Pioneer Electronic Corp | ノイズ低減装置 |
-
2007
- 2007-08-13 JP JP2007210921A patent/JP4977551B2/ja not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005004013A (ja) * | 2003-06-12 | 2005-01-06 | Pioneer Electronic Corp | ノイズ低減装置 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011175113A (ja) * | 2010-02-24 | 2011-09-08 | Kyocera Corp | 電子機器 |
EP2551846A1 (en) * | 2011-07-26 | 2013-01-30 | AKG Acoustics GmbH | Noise reducing sound reproduction |
US9491537B2 (en) | 2011-07-26 | 2016-11-08 | Harman Becker Automotive Systems Gmbh | Noise reducing sound reproduction system |
US9613612B2 (en) | 2011-07-26 | 2017-04-04 | Akg Acoustics Gmbh | Noise reducing sound reproduction system |
EP2782093A2 (en) | 2013-03-21 | 2014-09-24 | Honda Motor Co., Ltd. | Vehicular active vibrational noise control apparatus |
US9294837B2 (en) | 2013-03-21 | 2016-03-22 | Honda Motor Co., Ltd. | Vehicular active vibrational noise control apparatus |
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Publication number | Publication date |
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JP4977551B2 (ja) | 2012-07-18 |
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