JP3952571B2

JP3952571B2 - Speaker device

Info

Publication number: JP3952571B2
Application number: JP1109698A
Authority: JP
Inventors: 哲司小浦; 毅彦田名部; 周平小西
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1998-01-23
Filing date: 1998-01-23
Publication date: 2007-08-01
Anticipated expiration: 2018-01-23
Also published as: JPH11215586A

Description

【０００１】
【発明の属する技術分野】
本発明は音楽再生用をはじめとする全てのスピーカ装置にかかわり、特に１次元の指向性を制御したアレイ型のスピーカ装置にかかわるものである。
【０００２】
【従来の技術】
従来の技術を図４のアレイ型スピーカ装置により説明する。なお、図中の４１ａ〜４１ｈはスピーカ、４２は入力手段、４３は増幅手段、４４ａ〜４４ｈは調整手段である。
【０００３】
１次元方向の指向性を制御するアレイ型のスピーカ装置は、入力手段４２より入力された信号が増幅手段４３で増幅される。１次元アレイ型のスピーカ装置はスピーカの配列方向に指向性が狭くなるため、スピーカ４１ａ〜４１ｈの配列方向の指向性を狭く制御する場合には、スピーカ４１ａ〜４１ｈの数を多くすればよい。
【０００４】
また、スピーカ装置の大きさの制約等で多くできない場合には、例えば抵抗器で構成される減衰器である調整手段４４ａ〜４４ｈによってスピーカ４１ａ〜４１ｈの中央に配置されたスピーカほど再生レベルを大きくするよう調整される。また、スピーカ４１ａ〜４１ｈの配列方向の指向性を狭く制御するにはスピーカ４１ａ〜４１ｈの数を多くして配列方向の長さを十分にとる必要がある。よって、１次元アレイ型のスピーカ装置の指向性を水平方向に制御するにはスピーカ４１ａ〜４１ｈを水平方向に配列した方向に設置することになる。
【０００５】
【発明が解決しようとする課題】
以上の従来の技術では、水平方向に指向性を狭く制御した１次元アレイ型のスピーカ装置をステレオ化すると、スピーカ装置の水平方向の距離が大きくなってしまうという実使用上の問題があった。
【０００６】
【課題を解決するための手段】
上記課題を解決するために本発明のスピーカ装置は、水平方向に配列した複数のスピーカにそれぞれにＬチャンネル信号とＲチャンネル信号の比率を変化させて合成した合成信号を入力し、配列したスピーカ全体の中央より左側に位置した１つのスピーカのＬチャンネル成分の出力を最大とし、このスピーカから距離をおいて配置したスピーカほどＬチャンネル成分の出力を小さくし、配列したスピーカ全体の中央より右側に位置した１つのスピーカのＲチャンネルの出力を最大とし、このスピーカから距離をおいて配置したスピーカほどＲチャンネル成分の出力を小さくしたものであり、Ｌチャンネル信号とＲチャンネル信号に重みを付けた合成信号をスピーカから再生することで、Ｌチャンネル信号成分の再生音圧分布とＲチャンネル信号成分の再生音圧分布のそれぞれの最大音圧位置が水平方向に距離を置いて分布することになるため、水平方向に指向性を狭く制御した１次元アレイ型のスピーカ装置でありながら、従来のスピーカ装置の１台分の水平方向の大きさでステレオ化できるものとするとともに、更に、Ｌチャンネル信号とＲチャンネル信号を低域と高域で帯域分割し、低域成分のみＬチャンネル信号とＲチャンネル信号を等しい割合かつ等しい大きさで合成した合成信号をスピーカへ入力する構成としたものであり、指向性に影響を与えることの少ない低域は重みづけをしないようにしてスピーカに対する機械的負担を軽減するようにしたものである。
【０００７】
【発明の実施の形態】
本発明の請求項１に記載の発明は、複数のスピーカを水平方向に配列し、これらスピーカにはそれぞれにＬチャンネル信号とＲチャンネル信号を任意の割合で合成した合成信号を入力し、前記複数の配列されたスピーカ全体の中央より左側に位置した１つのスピーカのＬチャンネル成分の出力を最大とし、このスピーカから距離をおいて配置したスピーカほどＬチャンネル成分の出力を小さくし、前記複数の配列されたスピーカ全体の中央より右側に位置した他の１つのスピーカのＲチャンネル成分の出力を最大とし、この他の１つのスピーカから距離をおいて配置したスピーカほどＲチャンネル成分の出力を小さくしたものであり、Ｌチャンネル信号成分の再生音圧分布とＲチャンネル信号成分の再生音圧分布のそれぞれの最大音圧位置が水平方向に距離を置いて分布することになるため、水平方向に指向性を狭く制御した１次元アレイ型のスピーカ装置でありながら、従来のスピーカ装置の１台分の水平方向の大きさでステレオ化できるものとするとともにＬチャンネル信号とＲチャンネル信号を低域と高域で帯域分割し、低域成分のみＬチャンネル信号とＲチャンネル信号を等しい割合かつ等しい大きさで合成した合成信号をスピーカへ入力する構成としたものであり、指向性に影響を与えることの少ない低域は重みづけをしないようにしてスピーカに対する機械的負担を軽減するようにしたものである。
【００１１】
まず、本発明に至る改善例について図１（ａ）から図２により説明する。
（改善例１）
図１(ａ)は改善例のスピーカ装置の一形態の斜視図であり、図１（ｂ）は同回路ブロック図である。
【００１２】
同図によると、１１ａ〜１１ｈはスピーカ、１２ａ，１２ｂはそれぞれＬチャンネル、Ｒチャンネルの入力手段、１３ａ〜１３ｈは加算手段、１４ａ〜１４ｈは増幅手段である。
【００１３】
以下、回路構成も含め動作について説明すると、スピーカ１１ａ〜１１ｈは水平方向に配列されており、ＬチャンネルおよびＲチャンネルの入力信号がそれぞれ入力手段１２ａおよび１２ｂへ入力され、Ｌチャンネル信号とＲチャンネル信号は加算手段１３ａ〜１３ｈでそれぞれ任意の割合で合成された合成信号として増幅手段１４ａ〜１４ｈでそれぞれ増幅され、それぞれのスピーカ１１ａ〜１１ｈで再生される。
【００１４】
いま、配列されたスピーカ１１ａ〜１１ｈの中央より左側に位置するスピーカ１１ｃのＬチャンネル信号成分の出力が最大となるようにＬチャンネル信号が加算手段１３ｃで重みを付加し、増幅手段１４ｃで増幅する。スピーカ１１ｃの左側に配置されたスピーカ１１ｂ，１１ａの順にＬチャンネル信号成分の出力が小さくなるようにＬチャンネル信号がそれぞれ加算手段１３ｂ，１３ａで重みを付加し、増幅手段１４ｂ，１４ａで増幅する。
【００１５】
スピーカ１１ｃの右側に配置されたスピーカ１１ｄ，１１ｅ，１１ｆ，１１ｇ，１１ｈの順にＬチャンネル信号成分の出力が小さくなるようにＬチャンネル信号がそれぞれ加算手段１３ｄ，１３ｅ，１３ｆ，１３ｇ，１３ｈで重みを付加し、増幅手段１４ｄ，１４ｅ，１４ｆ，１４ｇ，１４ｈで増幅する。すなわち、Ｌチャンネル成分の出力レベルはスピーカ１１ｃで最大となり、スピーカ１１ｃから距離を置いて配置されたスピーカほどＬチャンネル信号成分の出力が小さくなるため、Ｌチャンネル信号成分の水平方向の指向性を狭く制御できる。
【００１６】
一方、配列されたスピーカ１１ａ〜１１ｈの中央より右側に位置するスピーカ１１ｆのＲチャンネル信号成分の出力が最大となるようにＲチャンネル信号が加算手段１３ｆで重みを付加し、増幅手段１４ｆで増幅する。スピーカ１１ｆの右側に配置されたスピーカ１１ｇ，１１ｈの順にＲチャンネル信号成分の出力が小さくなるようにＲチャンネル信号がそれぞれ加算手段１３ｇ，１３ｈで重みを付加し、増幅手段１４ｇ，１４ｈで増幅する。
【００１７】
また、スピーカ１１ｆの左側に配置されたスピーカ１１ｅ，１１ｄ，１１ｃ，１１ｂ，１１ａの順にＲチャンネル信号成分の出力が小さくなるようにＲチャンネル信号がそれぞれ加算手段１３ｅ，１３ｄ，１３ｃ，１３ｂ，１３ａで重みを付加し、増幅手段１４ｅ，１４ｄ，１４ｃ，１４ｂ，１４ａで増幅する。すなわち、Ｒチャンネル成分の出力レベルはスピーカ１１ｆで最大となり、スピーカ１１ｆから距離を置いて配置されたスピーカほどＲチャンネル信号成分の出力が小さくなるため、Ｒチャンネル信号成分の水平方向の指向性を狭く制御できる。
【００１８】
したがって、このようにＬチャンネル信号とＲチャンネル信号に重みを付けた合成信号をスピーカ１１ａ〜１１ｈから再生することで、Ｌチャンネル信号成分の再生音圧分布とＲチャンネル信号成分の再生音圧分布のそれぞれの最大音圧位置が水平方向に距離を置いて分布することになるため、水平方向に指向性を狭く制御した１次元アレイ型のスピーカ装置でありながら、従来のスピーカ装置の１台分の水平方向の大きさでステレオ化が可能となる。
【００１９】
なお、上記形態ではスピーカの数を８個とし、スピーカ１１ｃのＬチャンネル信号成分の出力を最大、スピーカ１１ｆのＲチャンネル信号成分の出力を最大とした重みを付けて説明したが、スピーカの数はこれに限るものでなくてもよく、Ｌチャンネル信号成分およびＲチャンネル信号成分の出力が最大となる重みを付けたスピーカも、全スピーカ１１ａ〜１１ｈの中央部より左側に位置したスピーカであればどのスピーカがＬチャンネル信号成分の出力を最大とした重み付けをしてもよく、全スピーカ１１ａ〜１１ｈの中央部より右側に位置したスピーカであればどのスピーカがＲチャンネル成分の出力を最大とした重み付けがされてもよいことは言うまでもないことである。
【００２０】
また、Ｌチャンネル信号成分およびＲチャンネル信号成分の最大の重み付けを施したスピーカはそれぞれ１台としたが、例えばスピーカ１１ｂ，１１ｃがＬチャンネル信号成分の出力を最大、スピーカ１１ｆ，１１ｇがＲチャンネル信号成分の出力を最大とする複数であってもよい。
【００２１】
さらに、回路部は上述した重み付けを実現する一例を示したまでで、もちろん他の重み付けのための手段で行ってもよい。
【００２２】
（改善例２）
図２は他の改善例のスピーカ装置のブロック図を示すものであり、同図によると、２１ａ〜２１ｈはスピーカ、２２ａ，２２ｂはそれぞれＬチャンネル、Ｒチャンネルの入力手段、２３ａ〜２３ｄは加算手段、２４ａ〜２４ｆは増幅手段、２５ａ〜２５ｄは調整手段であり、改善例１と大きく異なるのは調整手段２５ａ〜２５ｄが挿入され、スピーカ２１ａ，２１ｂがＬチャンネル信号のみを、スピーカ２１ｇ，２１ｈがＲチャンネル信号のみを再生する構成とした点である。
【００２３】
以下に動作を詳細な構成とともに説明すると、８個のスピーカ２１ａ〜２１ｈが水平方向に配列され、ＬチャンネルおよびＲチャンネルの入力信号がそれぞれ入力手段２２ａおよび２２ｂへ入力され、Ｌチャンネル信号とＲチャンネル信号は加算手段２３ａ〜２３ｄでそれぞれ任意の割合で合成されて合成信号となり、加算手段２３ａ〜２３ｄからのそれぞれの合成信号が増幅手段２４ｂ〜２４ｅでそれぞれ増幅され、それぞれのスピーカ２１ｃ〜２１ｆで再生される。
【００２４】
また、ＬチャンネルおよびＲチャンネル信号はそれぞれ直接増幅手段２４ａ，２４ｆに入力され、増幅手段２４ａの出力は調整手段２５ａ，２５ｂを経由してそれぞれスピーカ２１ａ，２１ｂで再生され、増幅手段２４ｆの出力は調整手段２５ｃ，２５ｄを経由してそれぞれスピーカ２１ｇ，２１ｈで再生される。
【００２５】
改善例１と同様に配列したスピーカ２１ａ〜２１ｈの中央より左側に位置するスピーカ２１ｃのＬチャンネル信号成分の出力が最大となるようにＬチャンネル信号が加算手段２３ａで重みを付加し、増幅手段２４ｂで増幅する。スピーカ２１ｃの左側に配置されたスピーカ２１ｂ，２１ａはＬチャンネル信号のみが増幅手段２４ａで増幅された後、この順にＬチャンネル信号の出力が小さくなるようにそれぞれ調整手段２５ｂ，２５ａで重みを付加される。
【００２６】
スピーカ２１ｃの右側に配置されたスピーカ２１ｄ，２１ｅ，２１ｆの順にＬチャンネル信号成分の出力が小さくなるようにＬチャンネル信号がそれぞれ加算手段２３ｂ，２３ｃ，２３ｄで重みを付加し、増幅手段２４ｃ，２４ｄ，２４ｅで増幅する。すなわち、Ｌチャンネル成分の出力レベルはスピーカ２１ｃで最大となり、スピーカ２１ｃから距離を置いて配置されたスピーカほどＬチャンネル信号成分の出力が小さくなるため、Ｌチャンネル信号成分の水平方向の指向性を狭く制御できる。
【００２７】
一方、これも改善例１と同様であるが配列されたスピーカ２１ａ〜２１ｈの中央より右側に位置するスピーカ２１ｆのＲチャンネル信号成分の出力が最大となるようにＲチャンネル信号が加算手段２３ｄで重みを付加し、増幅手段２４ｅで増幅する。スピーカ２１ｆの右側に配置されたスピーカ２１ｇ，２１ｈはＲチャンネルの信号のみが増幅手段２４ｆで増幅された後、この順にＲチャンネル信号の出力が小さくなるようにそれぞれ調整手段２５ｃ，２５ｄで重みを付加する。スピーカ２１ｆの左側に配置されたスピーカ２１ｅ，２１ｄ，２１ｃの順にＲチャンネル信号成分の出力が小さくなるようにＲチャンネル信号がそれぞれ加算手段２３ｃ，２３ｂ，２３ａで重みを付加し、増幅手段２４ｄ，２４ｃ，２４ｂで増幅する。すなわち、Ｒチャンネル成分の出力レベルはスピーカ２１ｆで最大となり、スピーカ２１ｆから距離を置いて配置されたスピーカほどＲチャンネル信号成分の出力が小さくなるため、Ｒチャンネル信号成分の水平方向の指向性を狭く制御できる。
【００２８】
したがって、このようにＬチャンネル信号とＲチャンネル信号に重みを付けた合成信号をスピーカ２１ｃ〜２１ｆから再生し、Ｌチャンネル信号のみを重みを付けてスピーカ２１ａ，２１ｂから、Ｒチャンネル信号のみを重みを付けてスピーカ２１ｇ，２１ｈから再生することで、水平方向に指向性を狭く制御した１次元アレイ型のスピーカ装置でありながら、従来のスピーカ装置のステレオ化時と比較してその水平方向の大きさを小さくできるだけでなく、改善例１と比較して高価な増幅手段２４ａ〜２４ｆの数を低減した構成が可能となる。
【００２９】
なお、本改善例においてもスピーカの数は８個に限るものでなく、Ｌチャンネル信号成分およびＲチャンネル信号成分の出力が最大となるスピーカも、全スピーカの中央部より左側に位置したスピーカであればどのスピーカがＬチャンネル成分の出力を最大としてもよく、全スピーカの中央部より右側に位置したスピーカであればどのスピーカがＲチャンネル成分の出力を最大としてもよく、また、Ｌチャンネル信号のみ、Ｒチャンネル信号のみを再生するスピーカはそれぞれ２台でなくても１台以上であればよいことは言うまでもないことである。
【００３０】
（実施の形態１）
図３は本発明の一実施の形態のブロック図であり、同図によると、３１ａ〜３１ｈはスピーカ、３２ａ，３２ｂはそれぞれＬチャンネル、Ｒチャンネルの入力手段、３３ａ，３３ｂはハイパスフィルタ、３４はＬチャンネル信号とＲチャンネル信号を同じ割合で加算する加算手段、３５はローパスフィルタ、３６ａ〜３６ｈは加算手段、３７ａ〜３７ｈは増幅手段であり、改善例１と大きく異なるのはハイパスフィルタ３３ａ，３３ｂ、ローパスフィルタ３５が挿入され、低域と高域に帯域分割されたＬチャンネルおよびＲチャンネル信号のうち、高域成分については実施の形態１と全く同様の処理がなされるが、低域についてはモノラル化されて全てのスピーカ３１ａ〜３１ｈへ重み付けされることなく、同じ大きさの信号が入力されることである。
【００３１】
以下、構成について動作とともに説明する。上述の改善例と同様スピーカ３１ａ〜３１ｈが水平方向に配列されており、ＬチャンネルおよびＲチャンネルの入力信号がそれぞれ入力手段３２ａおよび３２ｂへ入力され、Ｌチャンネル信号とＲチャンネル信号はそれぞれハイパスフィルタ３３ａ，３３ｂへ、また、加算手段３４へ入力されてＬチャンネルとＲチャンネルが同じ割合で加算されてモノラル信号となりローパスフィルタ３５へ入力される。
【００３２】
ハイパスフィルタ３３ａ，３３ｂを通過した信号は改善例１と全く同様の経路を辿り、その動作も実施の形態と同じであるため説明を省略し説明する。ローパスフィルタ３５を通過したモノラル信号は、加算手段３６ａ〜３６ｈでハイパスフィルタ３３ａ，３３ｂを通過したＬチャンネル信号とＲチャンネル信号が任意の割合で合成された合成信号と加算されるが、ここでモノラル信号は合成信号のような重みが付加されることなく、どの加算手段３６ａ〜３６ｈにおいても均等な大きさで出力され、増幅手段３７ａ〜３７ｈで同じ大きさに増幅され、全てのスピーカ３１ａ〜３１ｈより同じ大きさの出力で再生されることとなる。
【００３３】
一般に、スピーカは低域を再生するほど振幅が大きくなるためスピーカに加わる機械的負担が増大する。振幅量を低減するにはスピーカの振動板面積を大きくすればよいが、あまり大きくできない場合にはスピーカを多数個使って総和としてスピーカの振動板面積を稼ぎ、スピーカ１個あたりの振幅量を低減する。また、スピーカの再生音は波長が短くなる高域では指向性が鋭くなり、逆に波長が長くなる低域ほど無指向性となってしまう性質がある。
【００３４】
本発明のような１次元アレイ型のスピーカ装置において低域までスピーカの配列方向の指向性を狭く制御するには、多くのスピーカを配列して配列方向の長さを大きくとらなければならないため、指向性は高域のみ制御し、低域では制御しないことがより現実的となるが、本実施形態のように低域においては全スピーカ３１ａ〜３１ｈをモノラル信号で同じ大きさで再生すれば上述の各改善例のように重みを付加した場合に比べ、同じ音量を再生するならば、全スピーカ３１ａ〜３１ｈの振幅量が同じとなってその最大値が低減するためスピーカ３１ａ〜３１ｈに加わる機械的負担も軽減される。また、無指向性化する低域をモノラル再生してもステレオ時との音場の差が小さいため、ステレオ感全体に及ぼす影響は少ない。
【００３５】
したがって、本実施の形態は低域のみをモノラル化して全スピーカ３１ａ〜３１ｈから均一に再生することにより、高域の指向性を得ながら、低域の再生能力を拡大するものである。
【００３６】
また、本実施の形態においてもスピーカの数は８個に限るものでなくてもよい。
【００３７】
なお、上述のスピーカ装置では全て１次元方向にただ１列スピーカを配置したスピーカ装置として説明したが、２列等複数列スピーカを配置しても良いものである。
【００３８】
【発明の効果】
以上のように本発明のスピーカ装置は、水平方向の指向性を狭く制御した１次元アレイ型のスピーカ装置において、Ｌチャンネル信号とＲチャンネル信号の比率を変化させた合成信号を再生することによって、ステレオ化時にスピーカ装置の水平方向の大きさを小さく抑えることができるとともに、高域の指向性を得ながら、低域の再生能力を拡大するものである。
【図面の簡単な説明】
【図１】（ａ）本発明に至る改善例のスピーカ装置の外観斜視図
（ｂ）同要部である回路のブロック図
【図２】同他の改善例の要部であるブロック図
【図３】本発明の一実施の形態の要部であるブロック図
【図４】従来のスピーカ装置の要部であるブロック図
【符号の説明】
１１ａ〜１１ｈスピーカ
１２ａ，１２ｂ入力手段
１３ａ〜１３ｈ加算手段
１４ａ〜１４ｈ増幅手段
２１ａ〜２１ｈスピーカ
２２ａ，２２ｂ入力手段
２３ａ〜２３ｄ加算手段
２４ａ〜２４ｆ増幅手段
２５ａ〜２５ｄ調整手段
３１ａ〜３１ｈスピーカ
３２ａ，３２ｂ入力手段
３３ａ，３３ｂハイパスフィルタ
３４加算手段
３５ローパスフィルタ
３６ａ〜３６ｈ加算手段
３７ａ〜３７ｈ増幅手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to all speaker devices including those for music reproduction, and particularly to an array type speaker device in which one-dimensional directivity is controlled.
[0002]
[Prior art]
The prior art will be described with reference to the array type speaker device of FIG. In the figure, 41a to 41h are speakers, 42 is input means, 43 is amplification means, and 44a to 44h are adjustment means.
[0003]
In the array type speaker device that controls the directivity in the one-dimensional direction, the signal input from the input means 42 is amplified by the amplification means 43. Since the directivity of the one-dimensional array type speaker device becomes narrower in the speaker arrangement direction, the number of speakers 41a to 41h may be increased when the directivity of the speakers 41a to 41h in the arrangement direction is controlled to be narrow.
[0004]
Further, when the speaker device size cannot be increased due to restrictions on the size of the speaker device, for example, the speaker disposed at the center of the speakers 41a to 41h by the adjusting means 44a to 44h, which are attenuators composed of resistors, increases the playback level. To be adjusted. Further, in order to narrowly control the directivity in the arrangement direction of the speakers 41a to 41h, it is necessary to increase the number of the speakers 41a to 41h and take a sufficient length in the arrangement direction. Therefore, in order to control the directivity of the one-dimensional array type speaker device in the horizontal direction, the speakers 41a to 41h are installed in the direction in which they are arranged in the horizontal direction.
[0005]
[Problems to be solved by the invention]
In the conventional techniques described above, when a one-dimensional array type speaker device whose directivity is controlled to be narrow in the horizontal direction is made stereo, the distance in the horizontal direction of the speaker device becomes large.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, a speaker device of the present invention inputs a composite signal synthesized by changing the ratio of an L channel signal and an R channel signal to each of a plurality of speakers arranged in a horizontal direction, and arranges the entire speaker. The maximum output of the L channel component of one speaker located on the left side of the center of the speaker is maximized, and the output of the L channel component is reduced as the speaker is arranged at a distance from this speaker. The output of the R channel of one speaker is maximized and the output of the R channel component is reduced as the speaker is arranged at a distance from the speaker, and the combined signal weights the L channel signal and the R channel signal. Is reproduced from the speaker, the reproduction sound pressure distribution of the L channel signal component and the R channel signal are reproduced. Since each maximum sound pressure position of the reproduction sound pressure distribution of the components is distributed with a distance in the horizontal direction, the conventional directivity is controlled narrowly in the horizontal direction. In addition to being able to be stereo-ized with the size of one speaker device in the horizontal direction , the L channel signal and the R channel signal are further divided into a low band and a high band, and only the low band component is converted into an L channel signal and an R channel. It is configured to input the synthesized signal, which is a composite of channel signals with the same ratio and equal magnitude, to the speaker, and the low frequency that does not affect the directivity is not weighted and the mechanical burden on the speaker Is intended to reduce.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, a plurality of speakers are arranged in a horizontal direction, and a composite signal obtained by synthesizing an L channel signal and an R channel signal at an arbitrary ratio is input to each speaker. The maximum output of the L channel component of one speaker located on the left side from the center of the entire array of speakers is maximized, and the output of the L channel component is reduced as the speaker is arranged at a distance from the speaker, and the plurality of arrays The maximum output of the R channel component of another speaker located on the right side of the center of the entire speaker is maximized, and the output of the R channel component is reduced as the speaker is arranged at a distance from the other speaker. The maximum sound pressure positions of the reproduction sound pressure distribution of the L channel signal component and the reproduction sound pressure distribution of the R channel signal component are Since it is distributed at a distance in the horizontal direction, it is a one-dimensional array type speaker device in which the directivity is controlled narrowly in the horizontal direction, but in the horizontal size of one conventional speaker device, it is stereo. The L-channel signal and the R-channel signal are divided into low and high frequencies, and the synthesized signal obtained by synthesizing the L-channel signal and the R-channel signal with the same ratio and the same size only to the low-frequency component is supplied to the speaker. In this configuration, the low frequency band that does not affect the directivity is not weighted so as to reduce the mechanical burden on the speaker.
[0011]
First, improvement examples leading to the present invention will be described with reference to FIGS.
(Improvement example 1)
1 (a) is a perspective view of Ichikatachi states of the speaker apparatus of an improvement example, FIG. 1 (b) is the same circuit block diagram.
[0012]
According to the figure, 11a to 11h are speakers, 12a and 12b are L channel and R channel input means, 13a to 13h are addition means, and 14a to 14h are amplification means.
[0013]
Hereinafter, the operation including the circuit configuration will be described. Speakers 11a to 11h are arranged in the horizontal direction, and L channel and R channel input signals are input to input means 12a and 12b, respectively. Are respectively amplified by the amplifying means 14a to 14h as synthesized signals synthesized at arbitrary ratios by the adding means 13a to 13h, and reproduced by the respective speakers 11a to 11h.
[0014]
The L channel signal is weighted by the adding means 13c and amplified by the amplifying means 14c so that the output of the L channel signal component of the speaker 11c located on the left side of the center of the arranged speakers 11a to 11h is maximized. . The L channel signals are weighted by the adding means 13b and 13a, and amplified by the amplifying means 14b and 14a so that the outputs of the L channel signal components become smaller in the order of the speakers 11b and 11a arranged on the left side of the speaker 11c.
[0015]
The L channel signals are weighted by the adding means 13d, 13e, 13f, 13g, and 13h so that the outputs of the L channel signal components decrease in the order of the speakers 11d, 11e, 11f, 11g, and 11h arranged on the right side of the speaker 11c. In addition, amplification is performed by the amplification means 14d, 14e, 14f, 14g, and 14h. That is, the output level of the L channel component is maximum at the speaker 11c, and the output of the L channel signal component is smaller as the speaker is arranged at a distance from the speaker 11c, and thus the horizontal directivity of the L channel signal component is narrowed. Can be controlled.
[0016]
On the other hand, the R channel signal is weighted by the adding unit 13f and amplified by the amplifying unit 14f so that the output of the R channel signal component of the speaker 11f located on the right side of the center of the arranged speakers 11a to 11h is maximized. . The R channel signals are weighted by the adding means 13g and 13h so that the output of the R channel signal components decreases in the order of the speakers 11g and 11h arranged on the right side of the speaker 11f, and are amplified by the amplifying means 14g and 14h.
[0017]
Also, the R channel signals are added by the adding means 13e, 13d, 13c, 13b, and 13a so that the output of the R channel signal components decreases in the order of the speakers 11e, 11d, 11c, 11b, and 11a arranged on the left side of the speaker 11f. A weight is added and amplified by the amplifying means 14e, 14d, 14c, 14b and 14a. That is, the output level of the R channel component is maximum at the speaker 11f, and the output of the R channel signal component becomes smaller as the speaker is arranged at a distance from the speaker 11f, so that the horizontal directivity of the R channel signal component is narrowed. Can be controlled.
[0018]
Therefore, by reproducing the combined signal weighted to the L channel signal and the R channel signal from the speakers 11a to 11h in this way, the reproduction sound pressure distribution of the L channel signal component and the reproduction sound pressure distribution of the R channel signal component are reproduced. Since each maximum sound pressure position is distributed at a distance in the horizontal direction, it is a one-dimensional array type speaker device in which the directivity is controlled narrowly in the horizontal direction, but it is equivalent to one conventional speaker device. Stereoization is possible with the horizontal size.
[0019]
In the above SL shape state and eight the number of loudspeakers, the maximum output of the L-channel signal components of the loudspeaker 11c, is described with the weight of the maximum output of the R-channel signal components of the loudspeaker 11f, the speaker The number is not limited to this, and the speaker weighted to maximize the output of the L channel signal component and the R channel signal component may be a speaker located on the left side from the central part of all the speakers 11a to 11h. Any speaker may be weighted so that the output of the L channel signal component is maximized, and if the speaker is located on the right side of the central portion of all the speakers 11a to 11h, which speaker maximizes the output of the R channel component. It goes without saying that weighting may be applied.
[0020]
Further, although the maximum weighting of the L channel signal component and the R channel signal component is set to one, for example, the speakers 11b and 11c have the maximum output of the L channel signal component, and the speakers 11f and 11g have the R channel signal. A plurality of components that maximize the output of the component may be used.
[0021]
Further, the circuit unit has shown an example for realizing the above-described weighting, and may be performed by other means for weighting.
[0022]
( Improvement example 2)
FIG. 2 shows a block diagram of a speaker device of another improved example . According to FIG. 2, 21a to 21h are speakers, 22a and 22b are L channel and R channel input means, and 23a to 23d are addition means. , 24a through 24f are amplifying means, 25 a to 25 d are adjustment means, the largely different from the improvement example 1 is inserted adjustment means 25 a to 25 d, a speaker 21a, 21b are only L-channel signal, a speaker 21g, is 21h The configuration is such that only the R channel signal is reproduced.
[0023]
The operation will be described below together with the detailed configuration. Eight speakers 21a to 21h are arranged in the horizontal direction, and L channel and R channel input signals are input to the input means 22a and 22b, respectively. The signals are combined at arbitrary ratios by the adding means 23a to 23d to become combined signals, and the combined signals from the adding means 23a to 23d are amplified by the amplifying means 24b to 24e, respectively, and reproduced by the speakers 21c to 21f. Is done.
[0024]
The L channel and R channel signals are directly input to the amplifying means 24a and 24f, respectively, and the output of the amplifying means 24a is reproduced by the speakers 21a and 21b via the adjusting means 25a and 25b, respectively. The output of the amplifying means 24f is Reproduction is performed on the speakers 21g and 21h via the adjusting means 25c and 25d, respectively.
[0025]
The L channel signal is weighted by the adding means 23a so that the output of the L channel signal component of the speaker 21c located on the left side of the center of the speakers 21a to 21h arranged in the same manner as in the improvement example 1 is added, and the amplifying means 24b. Amplify with. The speakers 21b and 21a arranged on the left side of the speaker 21c are weighted by adjusting means 25b and 25a so that only the L channel signal is amplified by the amplifying means 24a and the output of the L channel signal is reduced in this order. The
[0026]
The L channel signals are weighted by the adding means 23b, 23c and 23d so that the output of the L channel signal components decreases in the order of the speakers 21d, 21e and 21f arranged on the right side of the speaker 21c, and the amplifying means 24c and 24d are added. , 24e. That is, the output level of the L channel component is maximum at the speaker 21c, and the output of the L channel signal component is smaller as the speaker is arranged at a distance from the speaker 21c. Therefore, the directivity in the horizontal direction of the L channel signal component is narrowed. Can be controlled.
[0027]
On the other hand, this is the same as the improvement example 1, but the R channel signal is weighted by the adding means 23d so that the output of the R channel signal component of the speaker 21f located on the right side of the center of the arranged speakers 21a to 21h is maximized. And is amplified by the amplification means 24e. The speakers 21g and 21h arranged on the right side of the speaker 21f are weighted by adjusting means 25c and 25d, respectively, so that only the R channel signal is amplified by the amplifying means 24f and the output of the R channel signal decreases in this order. To do. The R channel signals are weighted by the adding means 23c, 23b, and 23a so that the output of the R channel signal components decreases in the order of the speakers 21e, 21d, and 21c arranged on the left side of the speaker 21f, and the amplifying means 24d and 24c are added. , 24b. That is, the output level of the R channel component is maximum at the speaker 21f, and the output of the R channel signal component becomes smaller as the speaker is arranged at a distance from the speaker 21f, so that the horizontal directivity of the R channel signal component is narrowed. Can be controlled.
[0028]
Therefore, the combined signal weighted to the L channel signal and the R channel signal is reproduced from the speakers 21c to 21f, and only the L channel signal is weighted and only the R channel signal is weighted from the speakers 21a and 21b. In addition, although it is a one-dimensional array type speaker device in which the directivity is controlled narrowly in the horizontal direction by reproducing from the speakers 21g and 21h, the size in the horizontal direction is larger than that of the conventional speaker device in stereo. As a result, a configuration in which the number of expensive amplifying means 24a to 24f is reduced as compared with the improvement example 1 is possible.
[0029]
In this improved example , the number of speakers is not limited to eight, and the speaker having the maximum output of the L channel signal component and the R channel signal component may be a speaker located on the left side from the central portion of all the speakers. Any speaker may maximize the output of the L channel component, and any speaker may be configured to maximize the output of the R channel component as long as the speaker is located on the right side of the central portion of all the speakers. Needless to say, the number of speakers that reproduce only the R channel signal is not limited to two, but may be one or more.
[0030]
(Embodiment 1 )
FIG. 3 is a block diagram of an embodiment of the present invention, in which 31a to 31h are speakers, 32a and 32b are L channel and R channel input means, 33a and 33b are high-pass filters, and 34 is An addition means for adding the L channel signal and the R channel signal at the same ratio, 35 is a low pass filter, 36a to 36h are addition means, and 37a to 37h are amplification means, and the high pass filters 33a and 33b are largely different from the improvement example 1. Of the L channel and R channel signals into which the low pass filter 35 is inserted and divided into the low frequency band and the high frequency band, the high frequency components are processed in exactly the same way as in the first embodiment. Signals of the same magnitude can be input without being weighted to all the speakers 31a to 31h. It is.
[0031]
Hereinafter, the configuration will be described together with the operation. Similarly to the above-described improvement example , the speakers 31a to 31h are arranged in the horizontal direction, L channel and R channel input signals are respectively input to the input means 32a and 32b, and the L channel signal and the R channel signal are respectively high pass filters 33a. , 33b and the addition means 34, the L channel and the R channel are added at the same rate to form a monaural signal and input to the low pass filter 35.
[0032]
The signals that have passed through the high-pass filters 33a and 33b follow exactly the same route as in the improvement example 1, and the operation thereof is also the same as that in the embodiment, so that the description is omitted. The monaural signal that has passed through the low-pass filter 35 is added to the synthesized signal in which the L channel signal and the R channel signal that have passed through the high-pass filters 33a and 33b are combined at an arbitrary ratio by the adding means 36a to 36h. The signal is output with the same magnitude in any of the adding means 36a to 36h without being added with a weight like a synthesized signal, amplified to the same magnitude in the amplifying means 37a to 37h, and all the speakers 31a to 31h. It will be played back with the output of the same size.
[0033]
In general, the loudspeaker increases in amplitude as the low frequency band is reproduced, so that a mechanical load applied to the loudspeaker increases. To reduce the amount of amplitude, the diaphragm area of the speaker can be increased. If it cannot be increased, use a large number of speakers to increase the diaphragm area of the speaker as a sum and reduce the amount of amplitude per speaker. To do. In addition, the reproduced sound of the speaker has a property that the directivity becomes sharp at a high frequency where the wavelength is short, and becomes non-directional at a low frequency where the wavelength is long.
[0034]
In the one-dimensional array type speaker device as in the present invention, in order to narrowly control the directivity in the speaker arrangement direction to a low frequency range, it is necessary to arrange many speakers and increase the length in the arrangement direction. It is more realistic to control the directivity only in the high frequency range and not in the low frequency range. However, if all the speakers 31a to 31h are reproduced with the same size as monaural signals in the low frequency range as in the present embodiment, the above-mentioned is possible. Compared to the case where weights are added as in each of the improvement examples , if the same volume is reproduced, the amplitude amount of all the speakers 31a to 31h becomes the same, and the maximum value is reduced, so that the machines added to the speakers 31a to 31h. Burden is reduced. In addition, even if monaural reproduction of a low-frequency region that is becoming omnidirectional is small, the difference in the sound field from the time of stereo is small, and therefore the influence on the overall stereo feeling is small.
[0035]
Therefore, in the present embodiment, only the low frequency is monaural and reproduced uniformly from all the speakers 31a to 31h, thereby expanding the low frequency reproduction capability while obtaining high frequency directivity.
[0036]
Also in this embodiment, the number of speakers is not limited to eight.
[0037]
Although described as above speaker device the speaker apparatus arranged only one row speaker all in a one-dimensional direction, it is permissible to place multiple rows speaker, two rows.
[0038]
【The invention's effect】
As described above, the speaker device of the present invention reproduces a composite signal in which the ratio of the L channel signal and the R channel signal is changed in the one-dimensional array type speaker device in which the directivity in the horizontal direction is narrowly controlled. The size of the speaker device in the horizontal direction can be kept small when stereo is used , and the reproduction capability in the low frequency range is expanded while obtaining the high frequency directivity.
[Brief description of the drawings]
FIG. 1A is an external perspective view of a speaker device of an improved example leading to the present invention. FIG. 1B is a block diagram of a circuit which is the main part. FIG. 2 is a block diagram which is a main part of the other improved example . 3 is a block diagram of a main part of an embodiment of the present invention FIG. 4 is a main part of a conventional speaker device block diagram eXPLANATION oF REFERENCE nUMERALS
11a to 11h Speakers 12a and 12b Input means 13a to 13h Addition means 14a to 14h Amplification means 21a to 21h Speakers 22a and 22b Input means 23a to 23d Addition means 24a to 24f Amplification means 25a to 25d Adjustment means 31a to 31h Speakers 32a and 32b Input means 33a, 33b High pass filter 34 Addition means 35 Low pass filter 36a-36h Addition means 37a-37h Amplification means

Claims

A plurality of speakers are arranged in a horizontal direction, and a combined signal obtained by synthesizing an L channel signal and an R channel signal at an arbitrary ratio is input to each of the speakers, and is positioned on the left side from the center of the plurality of arranged speakers. The output of the L channel component of one speaker is maximized, and the output of the L channel component is made smaller as the speaker is arranged at a distance from this speaker. A speaker device in which the output of the R channel component of one speaker is maximized, and the output of the R channel component is reduced as the speaker is arranged at a distance from the other speaker , and the L channel signal and the R channel signal Is divided into low and high frequency bands, and the L channel signal and R channel signal are equal proportions only for the low frequency components. Configuration and the speaker device for inputting a synthesized signal synthesized in equal magnitude to the speaker.