JP5063528B2 - ノイズキャンセルシステム - Google Patents
ノイズキャンセルシステム Download PDFInfo
- Publication number
- JP5063528B2 JP5063528B2 JP2008213174A JP2008213174A JP5063528B2 JP 5063528 B2 JP5063528 B2 JP 5063528B2 JP 2008213174 A JP2008213174 A JP 2008213174A JP 2008213174 A JP2008213174 A JP 2008213174A JP 5063528 B2 JP5063528 B2 JP 5063528B2
- Authority
- JP
- Japan
- Prior art keywords
- noise
- signal
- phase
- circuit
- filter circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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
- G10K11/1781—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
- G10K11/1787—General system configurations
- G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure 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
- 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
-
- 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
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
- G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
-
- 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
Description
11 フィルター回路
12 反転増幅回路
13 加算回路
14 増幅回路
15 減算回路
20 マイクアンプ
30 アンプ
40 ヘッドホンアンプ
50 スピーカユニット
60 マイクユニット
100 ノイズキャンセルユニット
Claims (6)
- 電気音響変換器を介して周囲の騒音を集音し騒音信号を出力するマイクユニット、前記騒音を消去するキャンセル信号を生成して出力するキャンセル信号生成手段、音楽などのオーディオ信号と上記キャンセル信号とを出力するスピーカユニットと、を備えるノイズキャンセルシステムであって、
上記キャンセル信号生成手段が、
上記騒音信号に含まれる所定の周波数領域の信号を出力するフィルター回路、
上記フィルター回路の出力を反転して増幅する増幅度が0より大きく1より小さい反転増幅回路、
上記騒音信号に上記反転増幅回路の出力を加算して出力する加算回路と、を有するノイズキャンセルシステム。 - 電気音響変換器を介して周囲の騒音を集音し騒音信号を出力するマイクユニット、前記騒音を消去するキャンセル信号を生成して出力するキャンセル信号生成手段、音楽などのオーディオ信号と上記キャンセル信号とを出力するスピーカユニットと、を備えるノイズキャンセルシステムであって、
上記キャンセル信号生成手段が、
上記騒音信号に含まれる所定の周波数領域の信号を出力するフィルター回路、
上記フィルター回路の出力を増幅する増幅度が0より大きく1より小さい正転増幅回路、
上記騒音信号から上記正転増幅回路の出力を減算して出力する減算回路と、を有するノイズキャンセルシステム。 - 上記フィルター回路が、ローパスフィルターであることを特徴とする請求項1、2に記載のノイズキャンセルシステム。
- 上記フィルター回路が、ハイパスフィルターであることを特徴とする請求項1、2に記載のノイズキャンセルシステム。
- 上記フィルター回路が、バンドパスフィルターであることを特徴とする請求項1、2に記載のノイズキャンセルシステム。
- 上記フィルター回路が、ノッチフィルターであることを特徴とする請求項1、2に記載のノイズキャンセルシステム。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008213174A JP5063528B2 (ja) | 2008-08-21 | 2008-08-21 | ノイズキャンセルシステム |
US12/510,679 US20100046769A1 (en) | 2008-08-21 | 2009-07-28 | Noise-canceling system |
EP09166646A EP2157568A2 (en) | 2008-08-21 | 2009-07-28 | Noise-canceling system |
CN200910164832.6A CN101656901B (zh) | 2008-08-21 | 2009-08-07 | 消噪系统 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008213174A JP5063528B2 (ja) | 2008-08-21 | 2008-08-21 | ノイズキャンセルシステム |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010050739A JP2010050739A (ja) | 2010-03-04 |
JP5063528B2 true JP5063528B2 (ja) | 2012-10-31 |
Family
ID=41396361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008213174A Expired - Fee Related JP5063528B2 (ja) | 2008-08-21 | 2008-08-21 | ノイズキャンセルシステム |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100046769A1 (ja) |
EP (1) | EP2157568A2 (ja) |
JP (1) | JP5063528B2 (ja) |
CN (1) | CN101656901B (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090175463A1 (en) * | 2008-01-08 | 2009-07-09 | Fortune Grand Technology Inc. | Noise-canceling sound playing structure |
US20110158420A1 (en) * | 2009-12-24 | 2011-06-30 | Nxp B.V. | Stand-alone ear bud for active noise reduction |
CN102314933A (zh) * | 2010-07-08 | 2012-01-11 | 宏碁股份有限公司 | 多媒体播放设备及产生多媒体播放设备的输出信号的方法 |
JP5707824B2 (ja) * | 2010-09-29 | 2015-04-30 | ソニー株式会社 | 制御装置、および制御方法 |
JP5728215B2 (ja) * | 2010-12-13 | 2015-06-03 | キヤノン株式会社 | 音声処理装置及び方法並びに撮像装置 |
JP5713771B2 (ja) * | 2011-04-11 | 2015-05-07 | 株式会社オーディオテクニカ | 防音送話器 |
CN102932713B (zh) * | 2011-08-10 | 2015-05-20 | 瑞昱半导体股份有限公司 | 信号处理装置 |
US9082389B2 (en) * | 2012-03-30 | 2015-07-14 | Apple Inc. | Pre-shaping series filter for active noise cancellation adaptive filter |
CN103269465B (zh) | 2013-05-22 | 2016-09-07 | 歌尔股份有限公司 | 一种强噪声环境下的耳机通讯方法和一种耳机 |
CN103856861A (zh) * | 2014-03-11 | 2014-06-11 | 深圳市中兴移动通信有限公司 | 主动降噪系统、降噪耳机和移动终端 |
CN105992095A (zh) * | 2015-02-11 | 2016-10-05 | 成都瑟曼伽科技有限公司 | 一种用于乐器音腔的弱音消音设备 |
US9666175B2 (en) * | 2015-07-01 | 2017-05-30 | zPillow, Inc. | Noise cancelation system and techniques |
CN106026966B (zh) * | 2016-05-12 | 2018-09-25 | 中国人民解放军国防科学技术大学 | 一种用于gmi磁传感器的陷波滤波方法及电路 |
CN105872908A (zh) * | 2016-05-23 | 2016-08-17 | 北京长安汽车工程技术研究有限责任公司 | 一种制动系统降噪方法及装置 |
CN106491140A (zh) * | 2016-11-23 | 2017-03-15 | 会听声学科技(北京)有限公司 | 一种听力测试系统及方法 |
CN108156546B (zh) * | 2016-12-05 | 2019-11-15 | 骅讯电子企业股份有限公司 | 主动降噪校正系统与扬声装置 |
CN208190866U (zh) * | 2017-03-03 | 2018-12-04 | 许乐轩 | 一种可穿戴式立体声设备 |
CN108954438B (zh) * | 2018-03-08 | 2020-06-09 | 佛山市云米电器科技有限公司 | 具有三维空间声场降噪装置的油烟机及降噪方法 |
CN111395877B (zh) * | 2020-03-31 | 2022-02-22 | 歌尔科技有限公司 | 锁具及锁具控制方法、控制装置和可读存储介质 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4239939A (en) * | 1979-03-09 | 1980-12-16 | Rca Corporation | Stereophonic sound synthesizer |
US7103188B1 (en) * | 1993-06-23 | 2006-09-05 | Owen Jones | Variable gain active noise cancelling system with improved residual noise sensing |
EP1380186B1 (en) * | 2001-02-14 | 2015-08-26 | Gentex Corporation | Vehicle accessory microphone |
GB0106269D0 (en) * | 2001-03-14 | 2001-05-02 | Auntiegravity Ltd | Improvements in noise cancellation |
KR100788678B1 (ko) * | 2006-01-14 | 2007-12-26 | 삼성전자주식회사 | 이어폰 기기의 소음 저감 장치 및 방법 |
JP4458269B2 (ja) * | 2005-05-18 | 2010-04-28 | 株式会社オーディオテクニカ | ノイズキャンセルヘッドフォン |
JP2008005269A (ja) * | 2006-06-23 | 2008-01-10 | Audio Technica Corp | ノイズキャンセルヘッドフォン |
JP5194434B2 (ja) * | 2006-11-07 | 2013-05-08 | ソニー株式会社 | ノイズキャンセリングシステムおよびノイズキャンセル方法 |
JP5564743B2 (ja) * | 2006-11-13 | 2014-08-06 | ソニー株式会社 | ノイズキャンセル用のフィルタ回路、ノイズ低減信号生成方法、およびノイズキャンセリングシステム |
-
2008
- 2008-08-21 JP JP2008213174A patent/JP5063528B2/ja not_active Expired - Fee Related
-
2009
- 2009-07-28 EP EP09166646A patent/EP2157568A2/en not_active Withdrawn
- 2009-07-28 US US12/510,679 patent/US20100046769A1/en not_active Abandoned
- 2009-08-07 CN CN200910164832.6A patent/CN101656901B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN101656901B (zh) | 2014-04-09 |
US20100046769A1 (en) | 2010-02-25 |
JP2010050739A (ja) | 2010-03-04 |
CN101656901A (zh) | 2010-02-24 |
EP2157568A2 (en) | 2010-02-24 |
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