JPH0632560B2 - Stereo playback device - Google Patents
Stereo playback deviceInfo
- Publication number
- JPH0632560B2 JPH0632560B2 JP61169614A JP16961486A JPH0632560B2 JP H0632560 B2 JPH0632560 B2 JP H0632560B2 JP 61169614 A JP61169614 A JP 61169614A JP 16961486 A JP16961486 A JP 16961486A JP H0632560 B2 JPH0632560 B2 JP H0632560B2
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- Prior art keywords
- speaker
- right channel
- speakers
- sound
- channel
- Prior art date
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- Expired - Lifetime
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- Stereophonic System (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、スピーカの近距離音場において広い聴取位
置に対して良好な定位感を付与するステレオ再生装置に
関するものである。Description: TECHNICAL FIELD The present invention relates to a stereo playback device that imparts a good sense of localization to a wide listening position in a near field of a speaker.
一般に、２チヤンネルステレオ再生装置は、２つのスピ
ーカの中央前方、例えば２つのスピーカと聴取位置が正
三角形の頂点の関係のように、２つのスピーカの中央前
方のある程度離れた位置において、最も良好な定位感
（ステレオ再生で再生された音像の位置的知覚）および
臨場感を得ることができる。In general, the two-channel stereo playback device is the best in a position in front of the center of the two speakers, for example, in a position some distance in front of the center of the two speakers, such as a relationship between the two speakers and the apex of the equilateral triangle. A sense of localization (positional perception of a sound image reproduced by stereo reproduction) and a sense of presence can be obtained.
これは音像の定位感が両耳間の音圧差と、時間差の関係
によつて得られるためである。この場合、スピーカと聴
取位置との距離が大きいときは２つのスピーカから聴取
者に達する行路長の差による両耳間の音圧差および時間
差の関係の乱れが少ないので、良好な定位感が比較的広
い範囲にわたつて得られる。しかしスピーカと聴取位置
との間隔が小さくなると、聴取者に達する行路長の差に
よる両耳間の音圧差および時間差の乱れが大きくなり、
良好な定位感は２つのスピーカの中央線上の近傍に限定
されてしまう。このようなとき、中央部以外で良好な定
位感を得ようとすると、左または右チヤンネル信号の音
圧差および時間差を制御することによつて良好な定位感
が得られる位置を移動することができる。This is because the sense of localization of the sound image is obtained by the relationship between the sound pressure difference between both ears and the time difference. In this case, when the distance between the speaker and the listening position is large, there is little disturbance of the relationship between the sound pressure difference between both ears and the time difference due to the difference in the path length reaching the listener from the two speakers, so that a good sense of localization is relatively obtained. Obtained over a wide range. However, when the distance between the speaker and the listening position becomes smaller, the difference in sound pressure difference between the ears and the time difference due to the difference in the path length reaching the listener increases,
Good localization is limited to the vicinity of the center line of the two speakers. In such a case, if an attempt is made to obtain a good sense of localization outside the central portion, it is possible to move the position where a good sense of localization is obtained by controlling the sound pressure difference and time difference of the left or right channel signals. .
しかしながら２つの音源から同時に音が発せられたと
き、人の耳は早く音が到達した方向に音源を定位して感
じる、いわゆる先行音定位の特性があり、定位感の得ら
れる位置を移動させることは、現実には困難な問題を有
している。However, when sound is emitted from two sound sources at the same time, the human ear has a so-called preceding sound localization characteristic in which the sound is localized and sensed in the direction in which the sound arrives quickly. Has a difficult problem in reality.
このような問題を解決するためにこの発明は、正面方向
に指向性を有する左右チヤンネル用のスピーカの他に、
右チヤンネルスピーカの位置から左チヤンネルスピーカ
の聴取位置に指向性を向けたスピーカと、左チヤンネル
スピーカの位置から右チヤンネルスピーカの聴取位置に
指向性を向けたスピーカと、右および左チヤンネルスピ
ーカの位置からそれぞれ外側に向けたスピーカによつて
構成され、これらのスピーカに入力する信号の振幅およ
び位相を制御する手段を設けたものである。In order to solve such a problem, the present invention, in addition to the speaker for the left and right channels having directivity in the front direction,
From the position of the right channel speaker to the listening position of the left channel speaker, and from the position of the left channel speaker to the listening position of the right channel speaker and from the position of the right and left channel speakers. Each of them is constituted by speakers directed to the outside, and means for controlling the amplitude and phase of signals input to these speakers is provided.
各スピーカからの音波が合成されて音像の定位範囲が広
がる。The sound waves from the speakers are combined to expand the localization range of the sound image.
第１図はこの発明の一実施例を示すブロック図である。
同図において１は右チヤンネル信号入力端子、２，１２
は極性反転器、３，１１は遅延器、４〜６，１３〜１５
は増幅器、７〜９，１６〜１８はスピーカ、１０は左チ
ヤンネル信号入力端子、１９〜２１は聴取位置、２２，
２３はそれぞれ右チヤンネル，左チヤンネルの音響放射
の主軸を表わしている。FIG. 1 is a block diagram showing an embodiment of the present invention.
In the figure, 1 is a right channel signal input terminal, 2, 12
Is a polarity reversal device, 3 and 11 are delay devices, 4 to 6, 13 to 15
Is an amplifier, 7-9, 16-18 is a speaker, 10 is a left channel signal input terminal, 19-21 is a listening position, 22,
Reference numerals 23 respectively represent the principal axes of sound radiation of the right and left channels.
第２図は左チヤンネルスピーカの構成を示しており、θ
１は前方方向外側の設置角、θ２は前方方向内側の設置
角である。それぞれのスピーカは垂直軸まわりに回動自
在になつており、右チヤンネルスピーカも同様な構造と
なつている。Fig. 2 shows the configuration of the left channel speaker, where θ
1 is the installation angle on the outside in the front direction, and θ2 is the installation angle on the inside in the front direction. Each speaker is rotatable around a vertical axis, and the right channel speaker has a similar structure.
このように構成された装置において右チヤンネル信号に
ついて着目すると、スピーカ９と聴取位置２１の間の行
路長と、スピーカ１７と聴取位置２１の間の行路長との
差により距離減衰のレベル差があるので、これを補正す
るため増幅器６を調節し聴取位置２１に向けて音波を放
射する。またスピーカ７は聴取位置１９の若干外側に向
け、聴取位置１９において頭内定位が発生するように増
幅器４を調節する。また、スピーカ８と聴取位置１９の
間の行路長と、スピーカ１６と聴取位置１９の間の行路
長の差により距離減衰と時間差があるので、これを補正
するため遅延器３で時間遅延を与えて、増幅器５でレベ
ルの補正をし、定位感が得られるようにする。Focusing on the right channel signal in the device thus configured, there is a level difference in distance attenuation due to the difference between the path length between the speaker 9 and the listening position 21 and the path length between the speaker 17 and the listening position 21. Therefore, in order to correct this, the amplifier 6 is adjusted to emit a sound wave toward the listening position 21. Further, the speaker 7 is directed slightly outward of the listening position 19, and the amplifier 4 is adjusted so that the in-head localization occurs at the listening position 19. Further, since there is a distance attenuation and a time difference due to the difference between the path length between the speaker 8 and the listening position 19 and the path length between the speaker 16 and the listening position 19, a time delay is given by the delay device 3 to correct this. Then, the level is corrected by the amplifier 5 so that a feeling of localization can be obtained.
次に左チヤンネルについて着目し、同様にして増幅器１
３，増幅器１５，増幅器１４，遅延器１１を調節する。Next, focusing on the left channel, the amplifier 1
3, the amplifier 15, the amplifier 14, and the delay device 11 are adjusted.
各聴取位置におけるこの発明の有効性は次の通りであ
る。聴取位置１９では先ずスピーカ７とスピーカ９から
の音波が同時に到来し、互いに干渉して指向パターンの
谷となり、スピーカ９からの不要な音のレベルは小さく
なるとともに、聴取者の両耳には逆相の信号が入射する
ために、聴取者は小さな音量の音像を頭内に定位する。
しかしその直後に、この音より大きい音量をもつた音が
スピーカ８とスピーカ１６から聞こえ、聴取者はスピー
カ８とスピーカ１６の間に音像を定位することになる。The effectiveness of the present invention at each listening position is as follows. At the listening position 19, sound waves from the speaker 7 and the speaker 9 arrive at the same time and interfere with each other to form a valley of the directional pattern, the level of unnecessary sound from the speaker 9 decreases, and the opposite sound is heard in both ears of the listener. Since the phase signals are incident, the listener localizes a low-volume sound image in his head.
However, immediately thereafter, a sound having a volume higher than this sound is heard from the speakers 8 and 16, and the listener localizes a sound image between the speakers 8 and 16.
一方、スピーカ１７からの音はスピーカ１６からの音と
同程度であるにもかかわらず、１ｍｓ以上遅れて到達す
るため、先行音定位の効果で感知されない。スピーカ１
８からの音はスピーカの指向特性によつて聴取位置２１
の外側に放射されているので、聴取位置１９において直
接音としては無視できる大きさである。聴取位置２０は
先ずスピーカ９とスピーカ１６からの音が聞こえるの
で、聴取者はこれにより音像を定位する。しかし、スピ
ーカ７とスピーカ１８からの音はそれぞれスピーカの指
向特性によつて全聴取者の外側に音を放射しているの
で、直接音としては聞こえない。次に到達するスピーカ
８とスピーカ１７からの音は１ｍｓ以上遅れて到達する
ために、先行音定位の効果によつて感知されない。On the other hand, although the sound from the speaker 17 is about the same as the sound from the speaker 16, it arrives with a delay of 1 ms or more, and therefore is not sensed by the effect of localization of the preceding sound. Speaker 1
The sound from 8 depends on the directional characteristics of the speaker and the listening position 21
Since it is radiated to the outside of the sound field, the sound level is negligible as a direct sound at the listening position 19. At the listening position 20, since the sounds from the speaker 9 and the speaker 16 are first heard, the listener localizes the sound image. However, the sounds from the speaker 7 and the speaker 18 are not audible as direct sounds because they are emitted to the outside of all listeners due to the directional characteristics of the speakers. The next arriving sound from the speaker 8 and the speaker 17 arrives with a delay of 1 ms or more, and therefore is not sensed by the effect of the preceding sound localization.
聴取位置２１ではまず、スピーカ１６とスピーカ１８か
らの音が同時に到来し、互いに干渉して指向パターンの
谷になつて、スピーカ１６からの不要な音のレベルは小
さくなるとともに、聴取者の両耳には逆相の信号が入射
する。しかし、その直後にこの音より大きな、スピーカ
９とスピーカ１７からの音が聞こえ、聴取者はスピーカ
９とスピーカ１７の間に音像を定位する。一方、スピー
カ８からの音はスピーカ９からの音と同程度の音量であ
るにもかかわらず、１ｍｓ以上遅れて到達するため、先
行音定位の効果により、感知されない。スピーカ７から
の音はスピーカの指向特性によつて聴取位置１９の外側
に放射されているので、聴取位置２１においては直接音
としては無視できる大きさになる。At the listening position 21, first, the sounds from the speakers 16 and 18 arrive at the same time and interfere with each other to form a valley in the directional pattern, so that the level of unnecessary sounds from the speaker 16 decreases and the ears of the listener are also reduced. A signal of opposite phase is incident on. However, immediately after that, a sound louder than this sound is heard from the speaker 9 and the speaker 17, and the listener localizes a sound image between the speaker 9 and the speaker 17. On the other hand, the sound from the speaker 8 arrives with a delay of 1 ms or more even though the sound from the speaker 9 has the same volume level, and therefore is not sensed due to the effect of the preceding sound localization. Since the sound from the speaker 7 is radiated to the outside of the listening position 19 due to the directional characteristics of the speaker, at the listening position 21, the sound becomes a negligible direct sound.
この結果、聴取位置１９ではスピーカ８とスピーカ１６
の音で、聴取位置２０ではスピーカ９とスピーカ１６の
音で、聴取位置２１ではスピーカ９とスピーカ１７の音
で音像が定位される。そして、スピーカ８，１７の音は
原入力信号より遅延させられているため、スピーカ９，
１６の音と同じ様な効果を有し、聴取位置１９，２１と
も聴取位置２０と同様に音像を定位することになる。す
なわち、従来の２チヤンネルステレオでのスピーカ中央
線上で聴取しているのと同じ状態でスピーカ中央線の外
でも音像が定位する。As a result, at the listening position 19, the speaker 8 and the speaker 16
The sound image is localized by the sound of the speakers 9 and 16 at the listening position 20, and the sound of the speakers 9 and 17 at the listening position 21. Since the sounds of the speakers 8 and 17 are delayed from the original input signal,
16 has the same effect as the sound of 16, and the sound image is localized at the listening positions 19 and 21 similarly to the listening position 20. That is, the sound image is localized outside the center line of the speaker in the same state as when listening on the center line of the speaker in the conventional two-channel stereo.
第３図，第４図はこの発明を適用した装置と、従来の装
置の主観評価試験結果の一例である。第３図は中央の聴
取位置（第１図の聴取位置２０）の場合であり、図の横
軸は収音した際の実音源の位置、縦軸は定位位置であ
り、Ｌ６０，Ｒ６０は左側0.6ｍ，右側0.6ｍを示してい
る。丸印は従来の２チヤンネルステレオ再生装置による
結果、角印はこの発明の装置による結果であつて、図中
の４５度線方向の一転鎖線上に試験結果があれば良好と
いうことになる。第４図は右側の聴取位置（第１図の聴
取位置１９）の場合である。この発明の結果は従来の２
チヤンネルステレオ再生装置の結果と比べて、斜め４５
度線方向の一点鎖線により近く、有効性が示されてい
る。FIG. 3 and FIG. 4 are examples of subjective evaluation test results of a device to which the present invention is applied and a conventional device. FIG. 3 shows the case of the central listening position (listening position 20 in FIG. 1), the horizontal axis of the figure is the position of the actual sound source when sound is collected, the vertical axis is the localization position, and L60 and R60 are on the left side. It shows 0.6m and 0.6m on the right side. The circles indicate the results obtained by the conventional two-channel stereo reproduction device, and the square marks indicate the results obtained by the device of the present invention. If the test results are on the alternate long and short dash line in the 45-degree line direction in the figure, it means that the test results are good. FIG. 4 shows the case of the right listening position (listening position 19 in FIG. 1). The result of this invention is 2
Compared to the result of the channel stereo playback device, the angle is 45
Effectiveness is shown closer to the dashed line in the direction of the parallels.
この結果から明らかなように、この発明は、再生スピー
カの近距離音場において広い聴取位置に対して良好な定
位感を付与することができる。また聴取位置は３つに区
分しているが、実際にはなめらかに変化していると考え
て良く、聴取者が聴取位置１９，２１の内側にあれば良
い。As is clear from this result, the present invention can give a good sense of localization to a wide listening position in the near field of the reproduction speaker. Although the listening position is divided into three, it may be considered that the listening position actually changes smoothly, and the listener may be inside the listening positions 19 and 21.
第５図はスピーカ７〜９またはスピーカ１６〜１８の設
置角（第２図の記号θで示す角）を遠隔操作により制御
するときの例であり、右チヤンネル系のうち、スピーカ
６の部分だけを表わしており、左チヤンネル系も同様の
構成となつている。図において３０は遠隔操作系、311
〜31nは操作部、３２，３６は制御部、３３は変調部、
３４は送信部、３５は受信部、３７は増幅器、３８はモ
ータ、３９は駆動伝達系、４０はスピーカ系である。FIG. 5 shows an example of controlling the installation angle (angle indicated by symbol θ in FIG. 2) of the speakers 7 to 9 or the speakers 16 to 18 by remote control, and only the speaker 6 part in the right channel system. The left channel system has the same structure. In the figure, 30 is a remote control system, 31 1
~ 31 n is an operation unit, 32 and 36 are control units, 33 is a modulation unit,
34 is a transmitter, 35 is a receiver, 37 is an amplifier, 38 is a motor, 39 is a drive transmission system, and 40 is a speaker system.
遠隔操作系３０はスピーカ７〜９の設置角をスピーカ位
置より離れたスピーカ前方の位置より調整するものであ
る。操作部３１はテンキー等の入力手段であつて、例え
ばキーの押下回数がスピーカの回転角度に対応する。こ
の操作部は種々のキーを有しており、音量調整等も行な
うことができる。制御部３２は操作部３１からの入力信
号（調整量）に機能キー毎の識別コードを付与し、変調
部３３では制御部３２からの出力を変調し、送信部３４
より送出する。送出信号は例えば赤外線であつて、この
場合送信部３４は赤外線の発光源となる。スピーカ系４
０はスピーカ筐体の内に組み込まれている。受信部３５
では遠隔操作系３０より送出された信号を受信するとと
もに復調し、識別コードと調整量からなる信号に変換す
る。制御部３６では識別コードを判定して、音量信号あ
るいは駆動制御信号ｓ１〜ｓ３を出力する。信号ｓ１は
スピーカ７を回動させるためのモータ３８の駆動用であ
り、信号Ｓ２，Ｓ３は図示していないが、スピーカ８，
９を回動させるためのモータ駆動用に使用される。The remote control system 30 adjusts the installation angle of the speakers 7 to 9 from the position in front of the speakers, which is distant from the position of the speakers. The operation unit 31 is an input means such as a ten-key pad, and, for example, the number of times the key is pressed corresponds to the rotation angle of the speaker. This operation unit has various keys and can also adjust the volume. The control unit 32 adds an identification code for each function key to the input signal (adjustment amount) from the operation unit 31, the modulation unit 33 modulates the output from the control unit 32, and the transmission unit 34.
Send out. The transmission signal is, for example, infrared rays, and in this case, the transmitter 34 serves as a light source of infrared rays. Speaker system 4
0 is built in the speaker housing. Receiver 35
Then, the signal transmitted from the remote control system 30 is received, demodulated, and converted into a signal including an identification code and an adjustment amount. The control unit 36 determines the identification code and outputs the volume signal or the drive control signals s1 to s3. The signal s1 is for driving the motor 38 for rotating the speaker 7, and the signals S2 and S3 are not shown, but the speaker 8 and
It is used for driving a motor for rotating the shaft 9.
なお、スピーカ５〜７およびスピーカ１６〜１８は第６
図に示すように、それぞれ２分割にして設置し、例えば
スピーカ８だけを回動させても設置角θ１，θ２を変え
られる。The speakers 5 to 7 and the speakers 16 to 18 are the sixth
As shown in the figure, the installation angles .theta.1 and .theta.2 can be changed even if they are installed in two divisions and only the speaker 8 is rotated.
このように、遠隔操作によつてスピーカを回動させるこ
とによつて、連続的な調整がリアルタイムに行なえ、調
整の前後における変化が明瞭に識別でき、円滑な調整が
行なえる。Thus, by rotating the speaker by remote control, continuous adjustment can be performed in real time, changes before and after the adjustment can be clearly identified, and smooth adjustment can be performed.
以上説明したようにこの発明は、一方のチヤンネルにつ
いて正面，内側，外側に向けた３つのスピーカを用意
し、他方のチヤンネルも同様な構成とし、それぞれのス
ピーカに供給する信号の振幅および位相を調節したの
で、近距離音場において広い聴取位置に対して良好な定
位感を得ることができるという効果を有する。As described above, according to the present invention, three speakers facing front, inside, and outside are prepared for one channel, and the other channel has the same configuration, and the amplitude and phase of the signal supplied to each speaker are adjusted. Therefore, there is an effect that a good localization feeling can be obtained for a wide listening position in a near field.
第１図はこの発明の一実施例を示すブロツク図、第２図
はスピーカの一例を示す斜視図、第３図および第４図は
中央および右側の聴取位置における主観的評価結果を示
すグラフ、第５図はスピーカの回動装置のブロツク図、
第６図はスピーカの他の実施例を示す斜視図である。 ２，１２……極性反転器、３，１１……遅延器、４〜
６，１３〜１５……増幅器、７〜９，１６〜１８……ス
ピーカ、１９〜２１……聴取位置、３２，３６……制御
部、３３……変調部、３４……送信部、３５……受信
部、３８……モータ、３９……駆動伝達系。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a perspective view showing an example of a speaker, FIGS. 3 and 4 are graphs showing subjective evaluation results at the center and right listening positions, FIG. 5 is a block diagram of the speaker rotation device,
FIG. 6 is a perspective view showing another embodiment of the speaker. 2, 12 ... polarity reversal device, 3, 11 ... delay device, 4 ~
6, 13-15 ... amplifier, 7-9, 16-18 ... speaker, 19-21 ... listening position, 32, 36 ... control section, 33 ... modulation section, 34 ... transmission section, 35 ... ... Reception unit, 38 ... Motor, 39 ... Drive transmission system.
Claims (2)
１の右チヤンネルスピーカと，遅延された右チヤンネル
信号を再生する第２の右チヤンネルスピーカと，増幅さ
れ位相反転された右チヤンネル信号を再生する第３の右
チヤンネルスピーカとからなる右チヤンネル系と、右チ
ヤンネル系と同一構成で原入力信号が左チヤンネル用で
あり、前記３種のスピーカを第１，第２，第３の左チヤ
ンネルスピーカとする左チヤンネル系からなり、第１の
スピーカはそれぞれ正面内側に向け、第２のスピーカは
それぞれ正面前方に向け、第３のスピーカはそれぞれ正
面外側へ向け、増幅量，位相遅延量は第２の右チヤンネ
ルスピーカの前面前方から第２の左チヤンネルスピーカ
の前面前方までの範囲において聴取音像が定位する状態
に設定したことを特徴とするステレオ再生装置。1. A first right channel speaker that reproduces an amplified right channel signal, a second right channel speaker that reproduces a delayed right channel signal, and an amplified phase-inverted right channel signal. A right channel system composed of a third right channel speaker and a right channel system having the same configuration as the original input signal for the left channel, and the three types of speakers are first, second and third left channel speakers. The first speaker is directed to the inside of the front, the second speaker is directed to the front of the front, the third speaker is directed to the outside of the front, and the amount of amplification and the amount of phase delay are the second. In the range from the front front of the right channel speaker to the front front of the second left channel speaker, the listening sound image is localized. Stereo playback apparatus according to symptoms.
１の右チヤンネルスピーカと、遅延された右チヤンネル
信号を再生する第２の右チヤンネルスピーカと，増幅さ
れ位相反転された右チヤンネル信号を再生する第３の右
チヤンネルスピーカとからなる右チヤンネル系と、右チ
ヤンネル系と同一構成で原入力信号が左チヤンネル用で
あり、前記３種のスピーカを第１，第２，第３の左チヤ
ンネルスピーカとする左チヤンネル系と各スピーカの指
向方向をそれぞれ独立に制御する調整機構と、この調整
機構を遠隔操作する手段とから構成され、第１のスピー
カはそれぞれ正面内側に向け、第２のスピーカはそれぞ
れ正面前方へ向け、第３のスピーカはそれぞれ正面外側
へ向け、増幅量，位相遅延量は第２の右チヤンネルスピ
ーカの前面前方から第２の左チヤンネルスピーカの前面
前方までの範囲において聴取音像が定位する状態に設定
したことを特徴とするステレオ再生装置。2. A first right channel speaker for reproducing an amplified right channel signal, a second right channel speaker for reproducing a delayed right channel signal, and an amplified and phase-inverted right channel signal. A right channel system composed of a third right channel speaker and a right channel system having the same configuration as the original input signal for the left channel, and the three types of speakers are first, second and third left channel speakers. The left channel system and an adjusting mechanism for independently controlling the directing directions of the speakers, and a means for remotely operating the adjusting mechanism. The first speaker faces the inside of the front surface, and the second speaker operates. The front and front of the second speaker, respectively, the third speaker toward the front outside, the amount of amplification and phase delay is the front front of the second right channel speaker. Stereo reproduction device listening sound image in a range up to the front in front of the second left-channel speaker is characterized by being set in a state of localization.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61169614A JPH0632560B2 (en) | 1986-07-18 | 1986-07-18 | Stereo playback device |
| US07/070,994 US4764960A (en) | 1986-07-18 | 1987-07-08 | Stereo reproduction system |
| CA000542085A CA1275054A (en) | 1986-07-18 | 1987-07-13 | Stereo reproduction system |
| DE19873723409 DE3723409A1 (en) | 1986-07-18 | 1987-07-15 | STEREO PLAYBACK |
| FR8710023A FR2601839B1 (en) | 1986-07-18 | 1987-07-16 | STEREO REPRODUCTION SYSTEM |
| KR1019870007777A KR900004668B1 (en) | 1986-07-18 | 1987-07-18 | Stereo reproduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61169614A JPH0632560B2 (en) | 1986-07-18 | 1986-07-18 | Stereo playback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6326198A JPS6326198A (en) | 1988-02-03 |
| JPH0632560B2 true JPH0632560B2 (en) | 1994-04-27 |
Family
ID=15889763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61169614A Expired - Lifetime JPH0632560B2 (en) | 1986-07-18 | 1986-07-18 | Stereo playback device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0632560B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0266093U (en) * | 1988-11-09 | 1990-05-18 | ||
| JP2827652B2 (en) * | 1992-01-22 | 1998-11-25 | 松下電器産業株式会社 | Sound reproduction system |
| KR100698256B1 (en) | 2004-07-16 | 2007-03-22 | 엘지전자 주식회사 | A Speaker Equipment using Display Window |
| JP4273343B2 (en) | 2005-04-18 | 2009-06-03 | ソニー株式会社 | Playback apparatus and playback method |
| EP3079375A1 (en) | 2015-04-10 | 2016-10-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Differential sound reproduction |
-
1986
- 1986-07-18 JP JP61169614A patent/JPH0632560B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6326198A (en) | 1988-02-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |