JP2008271067A - ノイズ低減装置および音響再生装置 - Google Patents
ノイズ低減装置および音響再生装置 Download PDFInfo
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Abstract
【解決手段】スピーカユニットが、その振動板の前後から出る音が加算可能なように、バッフル板に取り付けられることなく、保持手段により保持されるスピーカ1と、このスピーカ1の振動板の前後から出る音が加算されて相殺される領域に設けられたマイクロホン2とを備える。マイクロホン2で収音して得た音声信号を位相反転したノイズ低減音声信号を、スピーカ1に供給する。
【選択図】図1
Description
スピーカユニットが、その振動板の前後から出る音が加算可能なように、バッフル板に取り付けられることなく、保持手段により保持されるスピーカと、
前記スピーカの前記振動板の前後から出る音が加算されて相殺される領域に設けられたマイクロホンと、
前記マイクロホンで収音して得た音声信号を位相反転したノイズ低減音声信号を、前記スピーカに供給する手段と、
を備えることを特徴とする。
P=−ADMαN+FN+ADS ・・・(式1)
となる。
F≒ADMα ・・・(式2)
であるとすると、つまり、(式2)を満足するようにフィルタ回路13の伝達関数−αが設計されていれば、前述の(式1)は、
P≒ADS ・・・(式3)
となる。
上述の第1の実施形態の説明においては、この発明によるノイズ低減装置の原理的な構成例を示した。この第2の実施形態は、この発明によるノイズ低減装置を、自動車の車内におけるノイズ低減を図る目的に適用した場合である。
この第3の実施形態は、上述の実施形態のノイズ低減装置を備えると共に、5.1チャンネルのマルチサラウンド音声を再生することができるように構成した音響再生装置の実施形態である。この第3の実施形態は、第2の実施形態と同様に、自動車に搭載する音響再生装置に適用した場合である。
次に、図10に、以上説明したこの第3の実施形態における音響再生装置におけるスピーカ配置と再生音場例を説明する。
図13は、この第3の実施の形態の音声信号出力装置部40の構成例を示すブロック図である。この第3の実施の形態における音声信号出力装置部40は、マイクロコンピュータからなる制御部100と、音声信号処理部200とを備える。
音声信号受信分配部50Aおよび50Bは、上述したような、音響再生用の信号を生成するほか、ノイズ低減用かつ低域用スピーカ5Aおよび5Bに供給するノイズ低減音声信号をも生成して、当該スピーカ5Aおよび5Bに供給するようにする。
なお、第3の実施形態におけるノイズ低減用および低域用のスピーカおよび2個の中高域用のスピーカの配置位置は、上述した実施形態における配置位置に限定されるものではない。
Claims (8)
- スピーカユニットが、その振動板の前後から出る音が加算可能なように、バッフル板に取り付けられることなく、保持手段により保持されるスピーカと、
前記スピーカの前記振動板の前後から出る音が加算されて相殺される領域に設けられたマイクロホンと、
前記マイクロホンで収音して得た音声信号を位相反転したノイズ低減音声信号を、前記スピーカに供給する手段と、
を備えるノイズ低減装置。 - 請求項1に記載のノイズ低減装置において、
前記スピーカに供給するノイズ低減音声信号は、前記マイクロホンで収音した音声信号の低域成分のみとするためのローパスフィルタを備える
ことを特徴とするノイズ低減装置。 - 請求項1に記載のノイズ低減装置において、
前記スピーカには、前記ノイズ低減音声信号に加えて、所定の音声信号がさらに供給される
ことを特徴とするノイズ低減装置。 - 請求項3に記載のノイズ低減装置において、
前記スピーカは、リスナの耳の近傍に配置されるように、前記保持手段により保持される
ことを特徴とするノイズ低減装置。 - スピーカユニットが、その振動板の前後から出る音が加算可能なように、バッフル板に取り付けられることなく、保持手段により保持される左右チャンネル用の第1および第2のスピーカと、
前記第1および第2のスピーカのそれぞれにおいて、前記振動板の前後から出る音が加算されて相殺される領域に設けられた第1および第2のマイクロホンと、
前記第1および第2のマイクロホンで収音して得た音声信号を位相反転したノイズ低減音声信号を、それぞれ前記第1および第2のスピーカに供給する手段と、
前記第1および第2のスピーカに、それぞれ所定の音声信号を供給する音声信号供給手段と、
を備える音響再生装置。 - 請求項5に記載の音響再生装置において、
前記音声信号供給手段から前記第1および第2のスピーカに供給される前記所定の音声信号は、リスナが他のスピーカ装置から音声が放音されたように聴取するように、頭部伝達関数を用いた仮想音源処理が施されたものである
ことを特徴とする音響再生装置。 - スピーカユニットが、その振動板の前後から出る音が加算可能なように、バッフル板に取り付けられることなく、保持手段により保持されて、リスナの近傍に配置される第1のスピーカと、
前記第1のスピーカの前記振動板の前後から出る音が加算されて相殺される領域に設けられたマイクロホンと、
前記マイクロホンで収音して得た音声信号を位相反転したノイズ低減音声信号の低域成分を、前記第1のスピーカに供給する手段と、
前記リスナの近傍において、前記第1のスピーカの左右に、第2の保持手段により保持されて配置される第2および第3のスピーカと、
入力音声信号から低域成分と、左および右チャンネル用の中高域成分とを分離して得る分離手段と、
前記分離手段で分離された低域成分を、前記ノイズ低減音声信号の低域成分に加えて前記第1のスピーカに供給する手段と、
前記分離手段で分離された前記左および右チャンネル用の中高域成分を前記第2および第3のスピーカに供給する手段と、
を備える音響再生装置。 - 請求項7に記載の音響再生装置において、
前記第2および第3のスピーカに供給される音声信号は、リスナが他のスピーカ装置から音声が放音されたように聴取するように、頭部伝達関数を用いた仮想音源処理が施されたものである
ことを特徴とする音響再生装置。
Priority Applications (6)
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JP2007110005A JP4722878B2 (ja) | 2007-04-19 | 2007-04-19 | ノイズ低減装置および音響再生装置 |
US12/080,902 US8509452B2 (en) | 2007-04-19 | 2008-04-07 | Noise reduction apparatus and audio reproduction apparatus |
DE102008019660.6A DE102008019660B4 (de) | 2007-04-19 | 2008-04-18 | Audiowiedergabevorrichtung |
KR1020080035980A KR20080094601A (ko) | 2007-04-19 | 2008-04-18 | 노이즈 저감 장치 및 음향 재생 장치 |
CN2008100950051A CN101304621B (zh) | 2007-04-19 | 2008-04-21 | 噪声减小装置和音频再生装置 |
US13/875,526 US9330653B2 (en) | 2007-04-19 | 2013-05-02 | Noise reduction apparatus and audio reproduction apparatus |
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JP2007110005A JP4722878B2 (ja) | 2007-04-19 | 2007-04-19 | ノイズ低減装置および音響再生装置 |
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JP2008271067A true JP2008271067A (ja) | 2008-11-06 |
JP2008271067A5 JP2008271067A5 (ja) | 2009-02-05 |
JP4722878B2 JP4722878B2 (ja) | 2011-07-13 |
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US (2) | US8509452B2 (ja) |
JP (1) | JP4722878B2 (ja) |
KR (1) | KR20080094601A (ja) |
CN (1) | CN101304621B (ja) |
DE (1) | DE102008019660B4 (ja) |
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JPWO2021010397A1 (ja) * | 2019-07-17 | 2021-01-21 | ||
US20220375470A1 (en) * | 2019-11-07 | 2022-11-24 | Ask Industries Gmbh | Apparatus for outputting an audio signal in a vehicle cabin |
CN112890430A (zh) * | 2019-12-04 | 2021-06-04 | 惠州市杰德创新科技有限公司 | 降噪麻将桌 |
WO2021199115A1 (ja) * | 2020-03-30 | 2021-10-07 | 日本電信電話株式会社 | 音響システム |
JP7384272B2 (ja) | 2020-03-30 | 2023-11-21 | 日本電信電話株式会社 | 音響システム |
CN112224142A (zh) * | 2020-09-03 | 2021-01-15 | 中国汽车技术研究中心有限公司 | 车载独立声学空间系统及车辆 |
WO2022091254A1 (ja) * | 2020-10-28 | 2022-05-05 | 日本電信電話株式会社 | 音響システム |
WO2022215109A1 (ja) * | 2021-04-05 | 2022-10-13 | 日本電信電話株式会社 | キャンセル装置 |
JP7148751B1 (ja) | 2021-12-31 | 2022-10-05 | エーエーシー マイクロテック(チャンヂョウ)カンパニー リミテッド | 車内独立音領域制御方法、システム及び関連装置 |
JP2023099420A (ja) * | 2021-12-31 | 2023-07-13 | エーエーシー マイクロテック(チャンヂョウ)カンパニー リミテッド | 車内独立音領域制御方法、システム及び関連装置 |
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JP4722878B2 (ja) | 2011-07-13 |
KR20080094601A (ko) | 2008-10-23 |
US20080260174A1 (en) | 2008-10-23 |
US20130243225A1 (en) | 2013-09-19 |
CN101304621A (zh) | 2008-11-12 |
DE102008019660A1 (de) | 2008-10-23 |
CN101304621B (zh) | 2012-01-04 |
US8509452B2 (en) | 2013-08-13 |
US9330653B2 (en) | 2016-05-03 |
DE102008019660B4 (de) | 2019-10-24 |
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