JPS63194500A - Stereoscopic reproducing device - Google Patents

Stereoscopic reproducing device

Info

Publication number
JPS63194500A
JPS63194500A JP62026766A JP2676687A JPS63194500A JP S63194500 A JPS63194500 A JP S63194500A JP 62026766 A JP62026766 A JP 62026766A JP 2676687 A JP2676687 A JP 2676687A JP S63194500 A JPS63194500 A JP S63194500A
Authority
JP
Japan
Prior art keywords
woofer
frequency
pass filter
pressure level
changing means
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.)
Pending
Application number
JP62026766A
Other languages
Japanese (ja)
Inventor
Shigeki Kato
茂樹 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Ten Ltd
Original Assignee
Denso Ten Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP62026766A priority Critical patent/JPS63194500A/en
Publication of JPS63194500A publication Critical patent/JPS63194500A/en
Pending legal-status Critical Current

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  • Television Receiver Circuits (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To reproduce a rich and low temperature area with a simple circuit by including a means enlarging the gain of an amplifying circuit as the interrupting frequency of a low pass filter is lowered while constantly maintaining an output sound pressure level in the cross over frequency of the output sound pressure level of the speakers of right and left channels and the output sound pressure level of a woofer. CONSTITUTION:An acoustic signal from the acoustic signal sources 4, 6 of both right and left channels is added in an adder 8 and applied to the amplifying circuit 9. A gain changing means 10 is disposed in connection with this amplifying circuit 9. The acoustic signal amplified in the amplifying circuit 9 is filtered in the low pass filter 11, amplified in an amplifying circuit 12 and made the acoustic by the woofer 3. In relation to the low pass filter 11, an interrupting frequency changing means 13 is disposed. The gain changing means 10 and the interrupting frequency changing means 13 are interlockingly constituted, and accordingly, the gain of the amplifying circuit 9 is changed, thereby the interrupting frequency of the low pass filter 11 is changed.

Description

【発明の詳細な説明】 技術分野 本発明は、ステレオ再生v装置に関し、さらに詳しくは
、低音域、中音域、高tf域など周波数W域をい(つか
に分割して、それぞれIv瓜のスピーカで再生を行うよ
うにしたマルチウェイスピーカシステムなどにおいて好
適に実施される音響再生装置に関する。
DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a stereo reproduction device. The present invention relates to a sound reproduction device suitably implemented in a multi-way speaker system, etc., which performs reproduction.

背景技術 従来から、可聴周波数帯域を忠実に再生できるように、
たとえば低1′f域、中音域、高音域と言う31合に、
各再生周波数帯域ごとに専用のスピーカを設けた、いわ
ゆるマルチウェイスピーカシステムが用いられている。
Background technology Traditionally, in order to faithfully reproduce the audible frequency band,
For example, in the 31st range of low 1'f range, middle range, and high range,
A so-called multi-way speaker system is used in which a dedicated speaker is provided for each reproduction frequency band.

典型的な先)テ技術では、たとえば中高音域再生用スピ
ーカと低盲域再生泪のウーハとによってシステムを構成
した場合、低音域再生用スピーカに与えるイボ号を増強
することによって、ウーハの再生周波数帯域を見掛は上
低域側に拡大′することカイできるが、これによって両
スピーカの出力音圧レベルのクロ六オーバ周波数付近で
は、ウーハの出力音圧レベルの平坦度が損なわれること
になり、これを補正するために、イコライブ等の特別な
回路が必要であった。
In a typical technology, for example, if a system is configured with a speaker for medium and high frequency reproduction and a woofer for low blind reproduction, the reproduction of the woofer is enhanced by increasing the signal given to the speaker for reproduction of low frequency range. Although the frequency band can apparently be expanded to the upper and lower frequencies, this will impair the flatness of the output sound pressure level of the woofer in the vicinity of the 6-over frequency of the output sound pressure level of both speakers. In order to correct this, a special circuit such as an equalizer was required.

本発明の目的は、イコライザ等の特別な回路を用いるこ
となく、盟かな仙音域を再生することができるようにし
たステレオ再生5&置を提供することである。
It is an object of the present invention to provide a stereo reproduction device that can reproduce a typical sound range without using a special circuit such as an equalizer.

問題点を解決するための手段 本発−明は、聴取位置の左右に配置J!−れる2つのス
ピーカと、 前記両スピーカ間に配置されるウーハと、左右各チャネ
ルの音aイπ号源と、 左右両チャネルの音響信号を加算する加fr、器と、1
宵記加算器の出力を増幅してウーハに与える増幅回路と
、 増幅回路に直列に接続されるローパスフィルタと、 左右両チャネルのスピーカの出力音圧レベルと、ウーハ
の出力fl圧レベルとのクロスオーバー周波数における
出力音圧レベルを一定に保ちつつ、ローパスフィルタの
遮断)71波敗を低(するにつれて、曲記増幅回路の利
得を大きく変化する手段とを含むごとを特徴とするステ
レオ再生装置である。
Means for Solving the Problems - The present invention provides J! - a woofer placed between the two speakers, an audio a and pi source for each of the left and right channels, and an adder for adding the audio signals of both the left and right channels;
An amplifier circuit that amplifies the output of the Yoiki adder and supplies it to the woofer, a low-pass filter connected in series to the amplifier circuit, and a cross between the output sound pressure level of the left and right channel speakers and the output fl pressure level of the woofer. 71. A stereo reproduction device characterized by comprising means for greatly changing the gain of a music amplification circuit as the output sound pressure level at an over frequency is kept constant, and as the output sound pressure level at an over frequency is kept constant, the gain of a music amplification circuit is reduced as the cutoff of a low-pass filter is reduced. be.

作  用 本発明に従えば、聴取位置の左右にスピーカを配置し、
左右各チャネルの音響信号源からの音響信号の再生を好
う。またこれらのスピーカの間には、低音域再生用のウ
ーハが配置される。このウーハには、左右両チャネルの
信号が加算器によって加算され、増幅回路とローパスフ
ィルタとによって増幅、r波されて、ウーハに与えられ
る。このとき左右両チャネルのスピーカの出力音圧レベ
ルと、ウーハの出力音圧レベルとのクロス、オーバ周波
数における出力音圧レベルを一定に保ちつつ、ローパス
フィルタの遮断周波数を低くするにつれて、増幅1il
i回路の利得は大さく変化される。したがってクロスオ
ーバ周波数付近におけるウーハの出力音圧レベルの平坦
度を損なうことな(、ウーハの低盲域側の再生周波数帯
域を拡大することがで。
Effect According to the present invention, speakers are placed on the left and right sides of the listening position,
It prefers to reproduce the audio signals from the audio signal sources of the left and right channels. Furthermore, a woofer for reproducing low frequencies is placed between these speakers. Signals from both left and right channels are added to this woofer by an adder, amplified by an amplifier circuit and a low-pass filter, converted into r-waves, and applied to the woofer. At this time, while keeping the cross between the output sound pressure level of the speakers of both left and right channels and the output sound pressure level of the woofer, and the output sound pressure level at the over frequency constant, as the cutoff frequency of the low-pass filter is lowered, the amplification is increased by 1il.
The gain of the i-circuit is varied greatly. Therefore, the reproduction frequency band on the low blind area side of the woofer can be expanded without impairing the flatness of the woofer's output sound pressure level near the crossover frequency.

きる。Wear.

実施例 第1図は、本発明の一実施例の電気的購成を示すブロッ
ク図である。この実施例は、聴取位置の左側に配置され
る左チャネル用人ビーカ1と、右側に配置される右チヤ
ネル用スピーカ2と、両スピーカ1.2の間に配置され
るウー/)3とを有する3Dシステムで構成される。左
チャネルの音響信号源4からの音響信号は、増幅回路5
で増幅されて、スピーカ1によって音響化される。右チ
ャネルの音響信号源6からの′ts響信号は、増幅回路
7で増幅されて、スピーカ2に上って音響化される。
Embodiment FIG. 1 is a block diagram showing electrical purchasing in an embodiment of the present invention. This embodiment has a left channel beaker 1 placed on the left side of the listening position, a right channel speaker 2 placed on the right side, and a woo/) 3 placed between both speakers 1.2. It is composed of a 3D system. The acoustic signal from the left channel acoustic signal source 4 is transmitted to the amplifier circuit 5.
The signal is amplified by the speaker 1 and turned into sound by the speaker 1. The 'ts acoustic signal from the right channel acoustic signal source 6 is amplified by the amplifier circuit 7 and sent to the speaker 2 to be turned into sound.

左右両チャネルの音P8a号源4,6からの音響信号は
また、加算器8で加算され、増幅器IJPI9に与えら
れる。この増幅回路9に関連して、利得変化手段10が
設けられている。増幅回路9で増幅された盲管イゴ号は
、ローパスフィルタ11でr波され、増幅回路12で増
幅されてウーハ3によって音響化される。ウーハ3によ
って再生される低音域の宣言は指向性が低いため、聴取
者に音源の方向感を与えず、したがって左右両チャネル
の音響か1つのウーハ3によって再生されても、ステレ
オ感が損なわれることはない。
The sound signals from the sound P8a sources 4 and 6 of both the left and right channels are also summed in an adder 8 and fed to an amplifier IJPI9. A gain changing means 10 is provided in connection with this amplifier circuit 9. The blind tube IGO signal amplified by the amplifier circuit 9 is converted into an R wave by the low-pass filter 11, amplified by the amplifier circuit 12, and converted into sound by the woofer 3. Since the low frequency declaration reproduced by the woofer 3 has low directivity, it does not give the listener a sense of direction of the sound source, and therefore the stereo feeling is impaired even if the sound of both left and right channels is reproduced by one woofer 3. Never.

ローパスフィルタ11に関連して、遮断周波数変化手段
13が設けられる。利得変化小5210と、遮1tlt
周波数変化手段13とは、連動して構成されてすjす、
したがって増幅回路9の利得を変化させることによって
、ローパスフィルタ11の遮断周波数が変化される。
In association with the low-pass filter 11, cut-off frequency changing means 13 is provided. Small gain change 5210 and block 1tlt
The frequency changing means 13 is configured in conjunction with the frequency changing means 13.
Therefore, by changing the gain of the amplifier circuit 9, the cutoff frequency of the low-pass filter 11 is changed.

第2図は第1図に示されたウーハ3に関連する部分の具
体的構成を示すブロック図であり、前述の第1図に対応
する部分には、同一の参照符を付す、左右各チャネルの
音響信号源4,6からの盲管信号は、加算器8にダえら
れ、それぞれコンデンサ21.22と、抵抗23.24
とを介して、演算増幅器25の反転入力端子に共通に入
力される。
FIG. 2 is a block diagram showing the specific configuration of the parts related to the woofer 3 shown in FIG. 1, and the parts corresponding to those in FIG. The blind tube signals from the acoustic signal sources 4 and 6 are added to an adder 8, which is connected to a capacitor 21, 22 and a resistor 23, 24, respectively.
It is commonly input to the inverting input terminal of the operational amplifier 25 via the .

演算増幅器25の非反頓入力端子には、Vcc/2が供
給される。演算増幅器25の反転入力端子と、出力端子
との間には、抵抗27が介在される。
A non-inverting input terminal of the operational amplifier 25 is supplied with Vcc/2. A resistor 27 is interposed between the inverting input terminal and the output terminal of the operational amplifier 25.

演算増幅器25がらの出力は、増幅回路9に導かれ・抵
抗31を介して演算増幅器32の反転入力端子に与えら
れる。演算増幅器32の非反転入力端子には、Vcc/
2が供給される。演算増幅器32の反転入力端子と出力
端子との間には、抵抗34と利得変化手段10とが介在
される。利得変化手段10は、3つの抵抗35.36.
37と切換スイッチ38とで構成され、切換スイッチ3
8を切換えることによって、演算増幅器32の反転入力
端子と出力端子とは、抵抗35.3 G、37を選択的
に介して接続され、演算増幅器32の利得が変化される
The output of the operational amplifier 25 is led to the amplifier circuit 9 and applied to the inverting input terminal of the operational amplifier 32 via the resistor 31. The non-inverting input terminal of the operational amplifier 32 has Vcc/
2 is supplied. A resistor 34 and a gain changing means 10 are interposed between the inverting input terminal and the output terminal of the operational amplifier 32. The gain changing means 10 includes three resistors 35, 36 .
37 and a changeover switch 38, the changeover switch 3
8, the inverting input terminal and output terminal of the operational amplifier 32 are connected selectively through the resistors 35.3G and 37, and the gain of the operational amplifier 32 is changed.

演算増幅器32の出力は、ライン29からローパスフィ
ルタ11に与えられ、抵抗41.42を介して演算増幅
器43の非反転入力端子に入力される。抵抗41.42
間の接続点44は、コンデンサ45を介して、演算増幅
器43の反転入力端子と出力端子とに接続される。演算
増幅器43の非反転入力端子はまた、コンデンサ4Gを
介して接地される。
The output of the operational amplifier 32 is applied to the low-pass filter 11 through the line 29 and is input to the non-inverting input terminal of the operational amplifier 43 via resistors 41 and 42. Resistance 41.42
A connection point 44 between them is connected to an inverting input terminal and an output terminal of an operational amplifier 43 via a capacitor 45. The non-inverting input terminal of operational amplifier 43 is also grounded via capacitor 4G.

ライン29と接続、α44との間において、抵抗41と
並列に第1遮断周波数変化手段47が接続され、また接
続点44と演算増幅器43の非反転入力端子との間にお
いて、抵抗42と並列に第28断周波i変化手段48が
接続される。第1遮断周波数変化手段47は、前述の利
得変化手段10と同様に、3つの抵抗4’)+50.5
1と、切換スイッチ52とで構成され、[2遮断周波数
変化手段48もまた同様に、3つの抵a:s 3 +5
4 +55と、切換スイッチ5Gとで構成される。f5
1遮断周波数変化手段47と、第2遮断周波数変化手段
48とは、遮断周波数変化手段13を構成し、これらの
切換スイッチ52.56は、利得変化手段10の切換ス
イッチ38と、連動して切換えられる。演算増幅器43
の出力は、抵抗57およびコンデンサ58ならびに抵抗
5つを介して、増;唱回路12に与えられる。
A first cut-off frequency changing means 47 is connected in parallel with the resistor 41 between the line 29 and the connection α44, and in parallel with the resistor 42 between the connection point 44 and the non-inverting input terminal of the operational amplifier 43. A twenty-eighth cutoff frequency i changing means 48 is connected. The first cut-off frequency changing means 47 includes three resistors 4')+50.5, similar to the gain changing means 10 described above.
1 and a changeover switch 52, [2 cutoff frequency changing means 48 also similarly includes three resistors a:s 3 +5
4 +55 and a selector switch 5G. f5
The first cut-off frequency changing means 47 and the second cut-off frequency changing means 48 constitute the cut-off frequency changing means 13, and these changeover switches 52 and 56 are switched in conjunction with the changeover switch 38 of the gain change means 10. It will be done. Operational amplifier 43
The output is given to the amplifier circuit 12 via a resistor 57, a capacitor 58, and five resistors.

第3図は入力レベルを一定としたときのウーハ3の出力
音圧レベルの周波数特性を示す図であり、第4図はロー
パスフィルタ11のr波特性を示す図である。fjS4
図において、参照符)1は、第1遮断周波数変化手段4
7の切換スイッチ52が抵抗49に導通されており、か
つ、第2遮断周波数変化手段48の切換スイッチ56が
抵抗53に導通されているときの特性を示し、この場合
の遮断周波数は1501(zである。同t1に参照符7
2は、切換スイッチ52が抵抗50と導通されており、
かつ、切換スイッチ56が抵抗54と導通されていると
きの特性を示し、この場合の遮断周波数は100Hzで
ある。参照tf’73は、切換スイッチ52が抵抗51
と導通されでおり、がっ、切換スイッチ5Gが抵抗55
と導通されているときの特性を示し、この場合の遮断周
波数は80Hzである。
FIG. 3 is a diagram showing the frequency characteristics of the output sound pressure level of the woofer 3 when the input level is constant, and FIG. 4 is a diagram showing the r-wave characteristics of the low-pass filter 11. fjS4
In the figure, reference numeral 1 indicates the first cut-off frequency changing means 4.
7 shows the characteristics when the changeover switch 52 of the second cutoff frequency changing means 48 is connected to the resistor 49, and the changeover switch 56 of the second cutoff frequency changing means 48 is connected to the resistor 53. In this case, the cutoff frequency is 1501(z The reference number 7 is at t1.
2, the changeover switch 52 is electrically connected to the resistor 50;
Further, the characteristics are shown when the changeover switch 56 is electrically connected to the resistor 54, and the cutoff frequency in this case is 100 Hz. In reference tf'73, the changeover switch 52 is connected to the resistor 51.
It is electrically connected to the resistor 55.
The cutoff frequency in this case is 80Hz.

したがって第3図および第4図の特性を重ね合わせるこ
とによって、ウーハ3の出力音圧レベルはf:tS5図
に示される周波数特性を得ることができる。この第5図
において、参照符、1!’ 1 aはローパスフィルタ
11の特性が第4図において参照111で示されたとき
のものであり、同様に参照符12aはローパスフィルタ
11の特性が第4図において参照符!2で示されたとき
のも゛のであり、参ffi符、f 3 aはローパスフ
ィルタ1工の特性が第4図において参照符73で示され
たときのものである。
Therefore, by superimposing the characteristics shown in FIGS. 3 and 4, the output sound pressure level of the woofer 3 can obtain the frequency characteristics shown in the f:tS5 diagram. In this FIG. 5, the reference mark 1! ' 1 a indicates the characteristics of the low-pass filter 11 shown in FIG. 2, and reference ffi and f 3 a are those when the characteristics of the low-pass filter 1 are shown as reference numeral 73 in FIG.

遮断周波数変化手段13によってウーハ3の特性が第5
図のように変化されるとさ、前述したように切換スイッ
チ52.5Gに連動して利得変化手段10の切換スイッ
チ38も切換えb jt、したがってウーハ3の出力音
圧レベルの周波数特性は、156図で示されるようにな
る。第6図において、参照符Jelbは、切換スイッチ
38が抵抗35と導通しているとき、すなわちローパス
フィルタ11の遮断周波数が1501−f zのときの
ものであり、このとき演算増幅器31の利得はOdBで
ある。
The characteristic of the woofer 3 is changed to the fifth by the cutoff frequency changing means 13.
When the change is made as shown in the figure, the changeover switch 38 of the gain change means 10 is also changed in conjunction with the changeover switch 52.5G as described above, and therefore the frequency characteristic of the output sound pressure level of the woofer 3 is 156. as shown in the figure. In FIG. 6, the reference mark Jelb indicates when the changeover switch 38 is in conduction with the resistor 35, that is, when the cutoff frequency of the low-pass filter 11 is 1501-fz, and at this time, the gain of the operational amplifier 31 is It is OdB.

参照符121+は、切換スイッチ38が抵抗36と導通
しているとき、すなわちローパスフィルタ11の遮rr
R周波数が100Hzのときのものであり、このとき演
算増11α器32によって、入力信号は3dBの増強が
行われる。参照符)3bは、切換スイッチ38が抵抗3
7に導通しているとき、すなわちローパスフィルタ11
の遮断周波数が8011zのときのものであり、このと
き演算増IQ H32によって、入力信号は13dB 
 の増強が打われる。参照符ノ4は、増幅回路5,7を
介するスピーカ1゜2の出力の和の音圧レベルの周波数
特性を示す。
Reference numeral 121+ indicates when the changeover switch 38 is in conduction with the resistor 36, that is, when the low-pass filter 11 is blocked rr.
This is when the R frequency is 100 Hz, and at this time, the input signal is amplified by 3 dB by the arithmetic amplifier 32. Reference mark) 3b indicates that the changeover switch 38 is connected to the resistor 3.
7, that is, when the low-pass filter 11
This is when the cut-off frequency of
reinforcement is struck. Reference number 4 indicates the frequency characteristic of the sound pressure level of the sum of the outputs of the speakers 1.degree.2 via the amplifier circuits 5 and 7.

このように、切換スイッチ38I52.56を連動して
切換えることによって、イコライザ等の1.7別な回路
を用いることなく、スピーカ1.2とウーハ3とのクロ
スオーバ周波数にt3ける出力音圧レベルを一定にして
、そのクロスオーバ周波数付近におけるウーハ3の出力
音圧レベルの平坦度を保ちながら、低音域側の再生周波
数帯域を見掛は1拡げることができる。したがって聴取
する音楽の種類にあわせて、ウーハ3の音響特性を選択
することができる。
In this way, by switching the changeover switches 38I52.56 in conjunction with each other, the output sound pressure level at t3 can be adjusted to the crossover frequency between the speaker 1.2 and the woofer 3 without using a separate circuit such as an equalizer. It is possible to apparently widen the playback frequency band on the bass side by 1 while keeping the output sound pressure level of the woofer 3 constant and maintaining the flatness of the output sound pressure level of the woofer 3 near the crossover frequency. Therefore, the acoustic characteristics of the woofer 3 can be selected according to the type of music to be listened to.

増幅回路つとローパスフィルタ11との順序は、相互に
入換えて溝成されてもよい。
The order of the amplifier circuits and the low-pass filters 11 may be interchanged.

効  果 以上のように本発明によれば、イコライザ等の特別な回
路を用いることなく、クロスオーバ周波数付近における
ウーハの出力音圧レベルの平坦度を損なわずにウーハの
低音域側の再生周波数帯域を拡大することができる。
Effects As described above, according to the present invention, the playback frequency band on the bass side of the woofer can be improved without using a special circuit such as an equalizer and without impairing the flatness of the output sound pressure level of the woofer in the vicinity of the crossover frequency. can be expanded.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例の電気的枯成を示すブロック
図、第2図は第1図に示されたウーハ3に関連する部分
の具体的!Iη成を示すブロック図、第3図はウーハ3
の出力音圧レベルの周波数特性を示す図、第4図はロー
パスフィルタ11のr波1、Y性を示す図、第5図はロ
ーパスフィルタ11の遮断周波数を切換えたときのウー
ハ3の出力音圧レベルの周波数特性を示す図、fjSG
図はローパスフィルタ11の遮断周波数および増幅回路
9の利得を変化させたときの、スピーカ2の出力音圧レ
ベルの周波数特性を示す図である。
FIG. 1 is a block diagram showing electrical depletion in one embodiment of the present invention, and FIG. 2 is a detailed diagram of the parts related to the woofer 3 shown in FIG. 1. A block diagram showing the Iη configuration, Figure 3 is the woofer 3
FIG. 4 is a diagram showing the r-wave 1 and Y characteristics of the low-pass filter 11, and FIG. 5 is the output sound of the woofer 3 when the cut-off frequency of the low-pass filter 11 is changed. Diagram showing frequency characteristics of pressure level, fjSG
The figure shows the frequency characteristics of the output sound pressure level of the speaker 2 when the cutoff frequency of the low-pass filter 11 and the gain of the amplifier circuit 9 are changed.

Claims (1)

【特許請求の範囲】 聴取位置の左右に配置される2つのスピーカと、前記両
スピーカ間に配置されるウーハと、 左右各チャネルの音響信号源と、 左右両チャネルの音響信号を加算する加算器と、前記加
算器の出力を増幅してウーハに与える増幅回路と、 増幅回路に直列に接続されるローパスフィルタと、 左右両チャネルのスピーカの出力音圧レベルと、ウーハ
の出力音圧レベルとのクロスオーバー周波数における出
力音圧レベルを一定に保ちつつ、ローパスフィルタの遮
断周波数を低くするにつれて、前記増幅回路の利得を大
きく変化する手段とを含むことを特徴とするステレオ再
生装置。
[Scope of Claims] Two speakers arranged on the left and right sides of a listening position, a woofer arranged between the two speakers, an acoustic signal source for each left and right channel, and an adder that adds the acoustic signals of both the left and right channels. an amplifier circuit that amplifies the output of the adder and supplies it to the woofer; a low-pass filter connected in series to the amplifier circuit; A stereo playback device characterized by comprising means for greatly changing the gain of the amplifier circuit as the cutoff frequency of the low-pass filter is lowered while keeping the output sound pressure level at the crossover frequency constant.
JP62026766A 1987-02-07 1987-02-07 Stereoscopic reproducing device Pending JPS63194500A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62026766A JPS63194500A (en) 1987-02-07 1987-02-07 Stereoscopic reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62026766A JPS63194500A (en) 1987-02-07 1987-02-07 Stereoscopic reproducing device

Publications (1)

Publication Number Publication Date
JPS63194500A true JPS63194500A (en) 1988-08-11

Family

ID=12202410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62026766A Pending JPS63194500A (en) 1987-02-07 1987-02-07 Stereoscopic reproducing device

Country Status (1)

Country Link
JP (1) JPS63194500A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0274119A (en) * 1988-09-08 1990-03-14 Fuji Electric Co Ltd Automatic monitoring method of digital relay analog input circuit
JPH0243099U (en) * 1988-09-14 1990-03-26
JPH0334394U (en) * 1989-08-11 1991-04-04
JPH03145897A (en) * 1989-10-31 1991-06-21 Toa Corp Time base correction device in speaker equipment
JPH0588020U (en) * 1992-04-30 1993-11-26 日本コロムビア株式会社 Subwoofer output circuit
JP2006014367A (en) * 2005-08-05 2006-01-12 Pioneer Electronic Corp Voice data processing method
JP2010068409A (en) * 2008-09-12 2010-03-25 Yamaha Corp Sound emitting apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0274119A (en) * 1988-09-08 1990-03-14 Fuji Electric Co Ltd Automatic monitoring method of digital relay analog input circuit
JPH0243099U (en) * 1988-09-14 1990-03-26
JPH0334394U (en) * 1989-08-11 1991-04-04
JPH03145897A (en) * 1989-10-31 1991-06-21 Toa Corp Time base correction device in speaker equipment
JPH0588020U (en) * 1992-04-30 1993-11-26 日本コロムビア株式会社 Subwoofer output circuit
JP2006014367A (en) * 2005-08-05 2006-01-12 Pioneer Electronic Corp Voice data processing method
JP2010068409A (en) * 2008-09-12 2010-03-25 Yamaha Corp Sound emitting apparatus

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