CA1321756C - Sound field reproducing apparatus - Google Patents
Sound field reproducing apparatusInfo
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- CA1321756C CA1321756C CA000609539A CA609539A CA1321756C CA 1321756 C CA1321756 C CA 1321756C CA 000609539 A CA000609539 A CA 000609539A CA 609539 A CA609539 A CA 609539A CA 1321756 C CA1321756 C CA 1321756C
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Abstract
ABSTRACT OF THE DISCLOSURE
A sound field reproduction apparatus comprises a reflectional sound signal generating circuits for generating quasi-reflectional sound signals by summing a plurality of delay signals obtained by delaying source signals in order, and amplifiers for amplifying the level of quasi-reflectional sound signals. The apparatus is characterized by a signal selecting and repeating device for alternatively repeating either the quasi-reflectional sound signals and the source signals, or source signals different from the above-described source signals. With this feature, it becomes possible to reproduce source signals other than the source signals for use in the sound field reproduction.
A sound field reproduction apparatus comprises a reflectional sound signal generating circuits for generating quasi-reflectional sound signals by summing a plurality of delay signals obtained by delaying source signals in order, and amplifiers for amplifying the level of quasi-reflectional sound signals. The apparatus is characterized by a signal selecting and repeating device for alternatively repeating either the quasi-reflectional sound signals and the source signals, or source signals different from the above-described source signals. With this feature, it becomes possible to reproduce source signals other than the source signals for use in the sound field reproduction.
Description
'1 3 ~
SOUND FIELD REPRODUCING APPARATUS
BACKGROUND OF THE_INVENTION
1. Field of the Invention 05 The present invention relates to a sound field reproducing apparatus.
SOUND FIELD REPRODUCING APPARATUS
BACKGROUND OF THE_INVENTION
1. Field of the Invention 05 The present invention relates to a sound field reproducing apparatus.
2. DescriPtion of ~ark~round Information Sound field reproduction apparatuses are generally structured to gener~te quasi-reflectional sound signals from input signals, and to drive a plurality of sub-speaker systems for generating quasi-reflectional sounds.
Consequently those apparatuses have complex circuit constructions, and are relatively expensive. ~ccordingly there are demands that a sound field reproduction apparatus is utilized effectively also when the sound field reproduction is not ef~ected by the apparatus.
OBJECT AND SUMMARY OF ~HE INVEN~ION
An object of the present invention is to provide a sound field reproduction apparatus which is capable of the sound field reproduction and also another function.
In order to attain the above object, a sound field reproduction apparatus according to the preæent in~ention comprises a reflectional sound signal generating means for generating quasi-reflectional sound signals by summing a plurality of delay signals obtained by delaying ~32:~7~$
source signals in order, and amplifiers for amplifying the level of quasi-reflectional sound signals, and the apparatus further includes signal selecting and repeating means for al~ernatively repeating either the quasi-05 reflectional sound signals and the source signals, oxsource signals different from the above-described source signals.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram showing an example of conventional sound field reproducing apparatus; and Figure 2 is a block diagram showing an embodiment of the sound ~ield reproducing apparatus according to the present invention.
DETAILED DESCRIPTION OF A PREFERRED ENBODIMENT
Before entering into the explanation of the embodiment of the present invention an example of conventional sound field reproducing apparatus will be explained with reference to Figure 1.
In Figure 1, signals from sources 1 through 3 are supplied to a selector 1. For, example, the source 1 is a video disc player and stereophonic signals are supplied from the video disc player. The source 2 is a CD player and also stereophonic signals are supplied from the CD
player. The third stereophonic signals are supplied from an FM tuner servi~g as the source 3. ~urth~r, the signals 7 ~
from these sources may be monaural signal6.
In accordance with the designation of an operator, the selector 1 selects signals from one of sources 1 through 3 and supplies them to a two-channel amplifier 2 05 and a surround circuit 3. The two-channel amplifier 2 is made up of two separa~e amplifiers for respectively amplifying the left and right signals of source signals, i.e. signals from the selected source. The left and right signals amplified in power~are supplied to main speaker systems 4a and 4b which are symmetrically placed a little to the centert at a front end of a listening-room.
The surround circuit 3 is made up of three or more reflectional sound circuits each of which includes a plurality of series circuits connected in parallel with each other, each of the series circuit being made up of a delay circuit for delaying the source signal a~d an amplifier for amplifying the output signal o~ the delay circuit. As an example, the surround cir~uit 3 shown in the figure is made up of three reflectional sound circuits.~The reflectional soun~ cixcuits ye~erate quasi-reflectional sound signals. Parameters used in the reflectional sound circuits, such as the de~lay ~Lme of the delay circuits and the amplification factor of the amplifiers of each reflectional sound circuit, are determined by a microprocessor (not shown) in the >~
surround circuit 3. The microprocessor is configured to read-out data, which corresponds to a sound field to be reproducedl from a ROM. The quasi-reflectional sound signal outputs of first and second reflectional sound 05 circuits are respectively supplied to front amplifiers 5 and 6, amplified in power by the front amplifiers 5 and 6, and supplied to front sub-~peaker system~ 4c and 4d which are placed at the left and right sides o~ the front end of the listening room.
The quasi-reflectional sound signal outputs of the third and fourth reflectional sound circuits are respectively supplied to rear amplifiers 7 and 8 and supplied to rear sub speaker systems 4e and 4f which are arranged on the left and riyht sides of a rear end of the listening room 4. The surround circuit 3 and the amplifiers 5 and 8 constitute the sound field repxoducing circuit 10.
In this way, at the time of the playback of a two-channel stereo, a concert-hall presence is obtained in the listening room 4 by adding the quasi-reflectional sounds by the front and rear sub-spea~er systems.
This sound field ~eproduction.apparatus driving a plurality of sub-speaker systems for generating quasi-reflectional sounds is relatively expensive. Therefore, ~5 as mentioned before, it is desirable that the apparatus 3 ~7~
is utilized eff~ctively also when the sound fi~ld reproduction is not performed.
An embodiment of the sound ~ield reproducing apparatus will ba described with reference to Figure 2.
05 Like reference numerals are used to denote like parts or corresponding elements in Figures 1 and 2, and the explanation of elament the same as the part~ shown in Figure 1 will not be repeated.
In the circuit arrangement shown in Figure 2, with the operation of a signal selecting circuit 2a, the two-channel amplifier 2 is commonly used in both of the case where the surround reproduction is performed and the case where the surround reproduction is not performed. With this construction, the front amplifiers 5 and 6 are eliminated in this arrangement, to save ~he cost.
Furthermore, the selector 20 is provided independently of the selec~or 1, and signalæ from sources 1 through :3 are also supplied to input terminals of the selector 20. The source signals selected by the selector 20 are respectively supplied to one input terminal of each of relay switches 22 and 23 through an input terminal 21a of the-sound field reproducing apparatus 21. To the other input terminal of each of the relay switches 22 and 23, ~uasi-rear reflectional sound signals are respectively supplied from the third and fourth reflectional sound circuit of the surrvund circuit 3. The relay switches 22 and 23 are configured to ~elect one of tw~ input ~ignals and supply it to the rear amplifiers 7 and 8 respectively, in response to the closing comrnand signal 05 supplied from a switch 24. The output signal of the r~lay switch 7 amplified in power by the rear amplifier 7 is supplied to a common input terminal of a relay switch 25 which operates in response to the above-mentioned closing command signal. The relay~switch 25 is configured to supply the amplified output signal to the rear speaker 4e in the listening room 4 through an outpu~ terminal 21b when the closing colmnand signal is no~ present. On the other hand, when the closing command signal is present the relay switch 25 supplies the amplified output signal to a speaker 27a placed in another room (or in other words, acoustic space) through an output terminal 21c.
On the other hand, the output signal of the relay switch 23 which has been amplified by the rear:amplifier 8 is supplied to the a common input terminal of a relay switch 26. When the above-mentioned closing command signal is not present, the relay switch 26 supplies the amplified output signal to the rear speaker in the listening room 4 through an output terminal 21d, and supplies it to a speaker 27b in the room 27 through an output terminal 21e when the above-mentioned closing p~ ~ ~
command signal is not present.
With this arrangement, when the ~ound field is to be reproduced in the listening room 4, the output signals of the surround circuit 3 are repeated to the two channel 05 ~mplifier 2 through the signal selecting circuit 2a, and the switch 24 is operated to its open state. A~ a result, the quasi-reflectional sound signals from the surround circuit 3 are selected by the relay switches 22 and 23, and amplified by the rear~amplifiers 7 and 8. This quasi-reflectional sound signals after having been amplifiedare supplied to the rear speakers 4e and 4f in the listening room 4 through the relay switches 25 and 26 SQ
~hat the sound field is reproduced as with the conventional apparatus.
lS On the other hand, when the sound from the signal source is to be listened in the room 27, the switch 24 ~s closed so that the closing command signal is supplied to the relay switches 22, 23, 25 a~d 26. When these relay switches are switched overr the source signals ~rom the source selected by the listener at the selector 20 are amplified in power by the rear amplifiers 7 and 8, and respectively supplied to the speakers 27a-and 27b placed in the room 27. Therefore, a sound from a desired source can be listened in the room 27. In this state, it is possible to reproduce ~he sound field in the listening room 4 by using the speakers 4a and 4b.
In this way, the amplifiers of the sound field reproducing apparatus are used both for the power amplification of the output signals of the surround 05 circuit 3 and the ampli~ication of the source signals.
~his means that the sound field reproducing apparatus can be versatilely utilized.
In addition, as illustrated by the dashed line in the Figure 2, the apparatus may be configured th~t the switch 24 is interconnected with the selector 20/ 50 that it is automatically switched ~hen source signals of any one source are selected by the selector 20.
Furthermore, it is also possible to arrange the apparatus such that the two channel amplifier 2 amplifies selectively either of the source signals or quasi-reflectional sound signals, as with the rear amplifiers.
Moreo~er~ by adopting an arrangement that the relay switches 22, ~3, 25 and 26 are operated independently, the source signals from another source can be reproduced by the rear sub-~peakers/ for example, when the source signals from one source is reproduced in the listening room 4.
As explained in the foregoing, in the case of the sound field reproducing apparatus according to the ~5 present invention, a signal selecting and repeating means ~g~
is provided between the reflectional sound generating circuit which derives quasi-xeflectional sound signal6 from the selected souxce signals and amplifiers which amplify the level of the output signals of the OS reflectional sound generating circuit, and selected ones among a plurality of original source signals and the above-described quasi-reflectional s~und signals are supplied to the above-described amplifiers. Therefore, the sound of source signals which are different from source signals to be used for the reproduction of the sound field can be listened without using any additîonal power amplifiers which generally require a high additional cost.
Consequently those apparatuses have complex circuit constructions, and are relatively expensive. ~ccordingly there are demands that a sound field reproduction apparatus is utilized effectively also when the sound field reproduction is not ef~ected by the apparatus.
OBJECT AND SUMMARY OF ~HE INVEN~ION
An object of the present invention is to provide a sound field reproduction apparatus which is capable of the sound field reproduction and also another function.
In order to attain the above object, a sound field reproduction apparatus according to the preæent in~ention comprises a reflectional sound signal generating means for generating quasi-reflectional sound signals by summing a plurality of delay signals obtained by delaying ~32:~7~$
source signals in order, and amplifiers for amplifying the level of quasi-reflectional sound signals, and the apparatus further includes signal selecting and repeating means for al~ernatively repeating either the quasi-05 reflectional sound signals and the source signals, oxsource signals different from the above-described source signals.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram showing an example of conventional sound field reproducing apparatus; and Figure 2 is a block diagram showing an embodiment of the sound ~ield reproducing apparatus according to the present invention.
DETAILED DESCRIPTION OF A PREFERRED ENBODIMENT
Before entering into the explanation of the embodiment of the present invention an example of conventional sound field reproducing apparatus will be explained with reference to Figure 1.
In Figure 1, signals from sources 1 through 3 are supplied to a selector 1. For, example, the source 1 is a video disc player and stereophonic signals are supplied from the video disc player. The source 2 is a CD player and also stereophonic signals are supplied from the CD
player. The third stereophonic signals are supplied from an FM tuner servi~g as the source 3. ~urth~r, the signals 7 ~
from these sources may be monaural signal6.
In accordance with the designation of an operator, the selector 1 selects signals from one of sources 1 through 3 and supplies them to a two-channel amplifier 2 05 and a surround circuit 3. The two-channel amplifier 2 is made up of two separa~e amplifiers for respectively amplifying the left and right signals of source signals, i.e. signals from the selected source. The left and right signals amplified in power~are supplied to main speaker systems 4a and 4b which are symmetrically placed a little to the centert at a front end of a listening-room.
The surround circuit 3 is made up of three or more reflectional sound circuits each of which includes a plurality of series circuits connected in parallel with each other, each of the series circuit being made up of a delay circuit for delaying the source signal a~d an amplifier for amplifying the output signal o~ the delay circuit. As an example, the surround cir~uit 3 shown in the figure is made up of three reflectional sound circuits.~The reflectional soun~ cixcuits ye~erate quasi-reflectional sound signals. Parameters used in the reflectional sound circuits, such as the de~lay ~Lme of the delay circuits and the amplification factor of the amplifiers of each reflectional sound circuit, are determined by a microprocessor (not shown) in the >~
surround circuit 3. The microprocessor is configured to read-out data, which corresponds to a sound field to be reproducedl from a ROM. The quasi-reflectional sound signal outputs of first and second reflectional sound 05 circuits are respectively supplied to front amplifiers 5 and 6, amplified in power by the front amplifiers 5 and 6, and supplied to front sub-~peaker system~ 4c and 4d which are placed at the left and right sides o~ the front end of the listening room.
The quasi-reflectional sound signal outputs of the third and fourth reflectional sound circuits are respectively supplied to rear amplifiers 7 and 8 and supplied to rear sub speaker systems 4e and 4f which are arranged on the left and riyht sides of a rear end of the listening room 4. The surround circuit 3 and the amplifiers 5 and 8 constitute the sound field repxoducing circuit 10.
In this way, at the time of the playback of a two-channel stereo, a concert-hall presence is obtained in the listening room 4 by adding the quasi-reflectional sounds by the front and rear sub-spea~er systems.
This sound field ~eproduction.apparatus driving a plurality of sub-speaker systems for generating quasi-reflectional sounds is relatively expensive. Therefore, ~5 as mentioned before, it is desirable that the apparatus 3 ~7~
is utilized eff~ctively also when the sound fi~ld reproduction is not performed.
An embodiment of the sound ~ield reproducing apparatus will ba described with reference to Figure 2.
05 Like reference numerals are used to denote like parts or corresponding elements in Figures 1 and 2, and the explanation of elament the same as the part~ shown in Figure 1 will not be repeated.
In the circuit arrangement shown in Figure 2, with the operation of a signal selecting circuit 2a, the two-channel amplifier 2 is commonly used in both of the case where the surround reproduction is performed and the case where the surround reproduction is not performed. With this construction, the front amplifiers 5 and 6 are eliminated in this arrangement, to save ~he cost.
Furthermore, the selector 20 is provided independently of the selec~or 1, and signalæ from sources 1 through :3 are also supplied to input terminals of the selector 20. The source signals selected by the selector 20 are respectively supplied to one input terminal of each of relay switches 22 and 23 through an input terminal 21a of the-sound field reproducing apparatus 21. To the other input terminal of each of the relay switches 22 and 23, ~uasi-rear reflectional sound signals are respectively supplied from the third and fourth reflectional sound circuit of the surrvund circuit 3. The relay switches 22 and 23 are configured to ~elect one of tw~ input ~ignals and supply it to the rear amplifiers 7 and 8 respectively, in response to the closing comrnand signal 05 supplied from a switch 24. The output signal of the r~lay switch 7 amplified in power by the rear amplifier 7 is supplied to a common input terminal of a relay switch 25 which operates in response to the above-mentioned closing command signal. The relay~switch 25 is configured to supply the amplified output signal to the rear speaker 4e in the listening room 4 through an outpu~ terminal 21b when the closing colmnand signal is no~ present. On the other hand, when the closing command signal is present the relay switch 25 supplies the amplified output signal to a speaker 27a placed in another room (or in other words, acoustic space) through an output terminal 21c.
On the other hand, the output signal of the relay switch 23 which has been amplified by the rear:amplifier 8 is supplied to the a common input terminal of a relay switch 26. When the above-mentioned closing command signal is not present, the relay switch 26 supplies the amplified output signal to the rear speaker in the listening room 4 through an output terminal 21d, and supplies it to a speaker 27b in the room 27 through an output terminal 21e when the above-mentioned closing p~ ~ ~
command signal is not present.
With this arrangement, when the ~ound field is to be reproduced in the listening room 4, the output signals of the surround circuit 3 are repeated to the two channel 05 ~mplifier 2 through the signal selecting circuit 2a, and the switch 24 is operated to its open state. A~ a result, the quasi-reflectional sound signals from the surround circuit 3 are selected by the relay switches 22 and 23, and amplified by the rear~amplifiers 7 and 8. This quasi-reflectional sound signals after having been amplifiedare supplied to the rear speakers 4e and 4f in the listening room 4 through the relay switches 25 and 26 SQ
~hat the sound field is reproduced as with the conventional apparatus.
lS On the other hand, when the sound from the signal source is to be listened in the room 27, the switch 24 ~s closed so that the closing command signal is supplied to the relay switches 22, 23, 25 a~d 26. When these relay switches are switched overr the source signals ~rom the source selected by the listener at the selector 20 are amplified in power by the rear amplifiers 7 and 8, and respectively supplied to the speakers 27a-and 27b placed in the room 27. Therefore, a sound from a desired source can be listened in the room 27. In this state, it is possible to reproduce ~he sound field in the listening room 4 by using the speakers 4a and 4b.
In this way, the amplifiers of the sound field reproducing apparatus are used both for the power amplification of the output signals of the surround 05 circuit 3 and the ampli~ication of the source signals.
~his means that the sound field reproducing apparatus can be versatilely utilized.
In addition, as illustrated by the dashed line in the Figure 2, the apparatus may be configured th~t the switch 24 is interconnected with the selector 20/ 50 that it is automatically switched ~hen source signals of any one source are selected by the selector 20.
Furthermore, it is also possible to arrange the apparatus such that the two channel amplifier 2 amplifies selectively either of the source signals or quasi-reflectional sound signals, as with the rear amplifiers.
Moreo~er~ by adopting an arrangement that the relay switches 22, ~3, 25 and 26 are operated independently, the source signals from another source can be reproduced by the rear sub-~peakers/ for example, when the source signals from one source is reproduced in the listening room 4.
As explained in the foregoing, in the case of the sound field reproducing apparatus according to the ~5 present invention, a signal selecting and repeating means ~g~
is provided between the reflectional sound generating circuit which derives quasi-xeflectional sound signal6 from the selected souxce signals and amplifiers which amplify the level of the output signals of the OS reflectional sound generating circuit, and selected ones among a plurality of original source signals and the above-described quasi-reflectional s~und signals are supplied to the above-described amplifiers. Therefore, the sound of source signals which are different from source signals to be used for the reproduction of the sound field can be listened without using any additîonal power amplifiers which generally require a high additional cost.
Claims (7)
1. A sound reproduction system comprising:
signal input means for receiving a plurality of input signals from a plurality of signal sources;
first selecting means for selectively transmitting at least one input signal from one of said plurality of signal sources received by said input means;
second selecting means for selectively transmitting at least one input signal from one of said plurality of signal sources received by said input means;
first amplifying means for amplifying said at least one input signal selected by said first selecting means and producing output signals;
second amplifying means for amplifying said at least one input signal selected by said second selecting means and producing output signals;
a first set of speakers placed in a first room;
a second set of speakers placed in a second room;
first supply means for supplying said output signals of said first amplifying means to said first set of speakers; and second supply means for supplying said output signals of said second amplifying means to said second set of speakers.
signal input means for receiving a plurality of input signals from a plurality of signal sources;
first selecting means for selectively transmitting at least one input signal from one of said plurality of signal sources received by said input means;
second selecting means for selectively transmitting at least one input signal from one of said plurality of signal sources received by said input means;
first amplifying means for amplifying said at least one input signal selected by said first selecting means and producing output signals;
second amplifying means for amplifying said at least one input signal selected by said second selecting means and producing output signals;
a first set of speakers placed in a first room;
a second set of speakers placed in a second room;
first supply means for supplying said output signals of said first amplifying means to said first set of speakers; and second supply means for supplying said output signals of said second amplifying means to said second set of speakers.
2. The sound reproduction system of claim 1 further comprising:
reflectional sound signal generating means connected to said first selecting means for generating as output first and second set of reflectional sound signals from said at least one input signal selected by said first selecting means;
first signal switching means having a first switch position for supplying said first set of reflectional sound signals generated by said reflectional sound signal generating means to said first amplifying means and a second switch position for supplying said at least one input signal of said one of said plurality of signal sources received by said input means to said first amplifying means;
second signal switching means having a first switch position for supplying said second set of reflectional sound signals generated by said reflectional sound signal generating means to said second amplifying means and a second switch position for supplying said at least one input signal selected by said second selecting means to said second amplifying means;
a third set of speakers placed in said first room;
and third signal switching means connected to said second amplifying means having a first switch position for supplying said output signals of said second amplifying means to said third set of speakers and a second switch position for supplying said output signals of said second amplifying means to said second set of speakers.
reflectional sound signal generating means connected to said first selecting means for generating as output first and second set of reflectional sound signals from said at least one input signal selected by said first selecting means;
first signal switching means having a first switch position for supplying said first set of reflectional sound signals generated by said reflectional sound signal generating means to said first amplifying means and a second switch position for supplying said at least one input signal of said one of said plurality of signal sources received by said input means to said first amplifying means;
second signal switching means having a first switch position for supplying said second set of reflectional sound signals generated by said reflectional sound signal generating means to said second amplifying means and a second switch position for supplying said at least one input signal selected by said second selecting means to said second amplifying means;
a third set of speakers placed in said first room;
and third signal switching means connected to said second amplifying means having a first switch position for supplying said output signals of said second amplifying means to said third set of speakers and a second switch position for supplying said output signals of said second amplifying means to said second set of speakers.
3. The sound reproduction system of claim 2, further comprising interlocking means, responsive to an operation of said second selecting means, for causing said second and third signal switching means to select their respective second switch positions when an input signal from a predetermined one of said plurality of signal sources is selected by said second selecting means.
4. A sound reproduction system comprising:
signal input means for receiving a plurality of input signals to be reproduced;
first source signal selecting circuit for selecting for output one of said input signals received by said signal input means;
signal selecting means having a first input terminal for receiving the output of the first source signal selecting circuit and a second input terminal, and selecting for output one of said input signals applied to said first or second input terminals thereof;
second source signal selecting circuit for selecting for output one of said plurality of input signals;
two-channel amplifier means for amplifying the output of said signal selecting means;
first and second pairs of speakers placed in a first room where it is desired to produce concert hall sound, said first pair of speakers being connected to said two-channel amplifier means;
a third pair of speakers placed in a second room where it is desired to produce regular sound:
sound field reproducing means comprising:
reflectional sound signal generating means receiving as input the output of said first source signal selecting circuit and generating as output first, second, third and fourth reflectional sound signals by delaying the input signal to produce delay signals and adding the delay signals in sequence, the first and second reflectional sound signals of said reflectional sound signal generating means being applied to the second input terminal of said signal selection means;
first relay switch having a first input terminal receiving the output of the second source signal selecting circuit and a second input terminal receiving the third reflectional sound signal of said reflectional sound signal generating means, said first relay switch supplying as output one of the signals applied to the first or second input terminal thereof;
second relay switch having a first terminal receiving the output of said second source signal selecting circuit and a second input terminal receiving the fourth reflectional sound signal of said reflectional sound signal generating means, said second relay switch means supplying as output one of the signals applied to the first or second input terminal thereof;
first amplifier means connected to the output of said first relay switch for amplifying the output thereof;
second amplifier means connected to the output of said second relay switch for amplifying the output thereof;
third relay switch means for receiving the output of the first amplifier and connecting the output of the first amplifier to either a first speaker of said second pair of speakers in the first room or a first speaker of said third pair of speakers in the second room;
fourth relay switch means for receiving the output of the second amplifier and connecting the output of the second amplifier to either a second speaker of said second pair of speakers in the first room or a second speaker of said third pair of speakers in the second room; and switch control means for controlling the first, second, third and fourth relay switch means, so that when it is desired to listen to concert hall sound of one of said plurality of input signals, the first and second relay switch means are caused to select the signals on their respective first input terminals, the third and fourth relay switch means are caused to connect the outputs of the first and second amplifier means, respectively, to the first and second speakers of the second pair of speakers in the first room, and the signal selecting means is caused to select the signal on the second input terminal thereof to connected the first and second relectional sound signals to the two channel amplifier means, and when it is desired to listen to normal sound reproduction in the second room, the first and second relay switch means are caused to select the signals on their respective second input terminals, the third and fourth relay switch means are caused to connect the outputs of the first and second amplifier means, respectively, to the first and second speakers of the third pair of speakers in the second room.
signal input means for receiving a plurality of input signals to be reproduced;
first source signal selecting circuit for selecting for output one of said input signals received by said signal input means;
signal selecting means having a first input terminal for receiving the output of the first source signal selecting circuit and a second input terminal, and selecting for output one of said input signals applied to said first or second input terminals thereof;
second source signal selecting circuit for selecting for output one of said plurality of input signals;
two-channel amplifier means for amplifying the output of said signal selecting means;
first and second pairs of speakers placed in a first room where it is desired to produce concert hall sound, said first pair of speakers being connected to said two-channel amplifier means;
a third pair of speakers placed in a second room where it is desired to produce regular sound:
sound field reproducing means comprising:
reflectional sound signal generating means receiving as input the output of said first source signal selecting circuit and generating as output first, second, third and fourth reflectional sound signals by delaying the input signal to produce delay signals and adding the delay signals in sequence, the first and second reflectional sound signals of said reflectional sound signal generating means being applied to the second input terminal of said signal selection means;
first relay switch having a first input terminal receiving the output of the second source signal selecting circuit and a second input terminal receiving the third reflectional sound signal of said reflectional sound signal generating means, said first relay switch supplying as output one of the signals applied to the first or second input terminal thereof;
second relay switch having a first terminal receiving the output of said second source signal selecting circuit and a second input terminal receiving the fourth reflectional sound signal of said reflectional sound signal generating means, said second relay switch means supplying as output one of the signals applied to the first or second input terminal thereof;
first amplifier means connected to the output of said first relay switch for amplifying the output thereof;
second amplifier means connected to the output of said second relay switch for amplifying the output thereof;
third relay switch means for receiving the output of the first amplifier and connecting the output of the first amplifier to either a first speaker of said second pair of speakers in the first room or a first speaker of said third pair of speakers in the second room;
fourth relay switch means for receiving the output of the second amplifier and connecting the output of the second amplifier to either a second speaker of said second pair of speakers in the first room or a second speaker of said third pair of speakers in the second room; and switch control means for controlling the first, second, third and fourth relay switch means, so that when it is desired to listen to concert hall sound of one of said plurality of input signals, the first and second relay switch means are caused to select the signals on their respective first input terminals, the third and fourth relay switch means are caused to connect the outputs of the first and second amplifier means, respectively, to the first and second speakers of the second pair of speakers in the first room, and the signal selecting means is caused to select the signal on the second input terminal thereof to connected the first and second relectional sound signals to the two channel amplifier means, and when it is desired to listen to normal sound reproduction in the second room, the first and second relay switch means are caused to select the signals on their respective second input terminals, the third and fourth relay switch means are caused to connect the outputs of the first and second amplifier means, respectively, to the first and second speakers of the third pair of speakers in the second room.
5. The sound reproduction system of claim 4 wherein the second source signal selecting circuit generates a command signal upon operation, said command signal indicative of the desire to listen to normal sound in the second room through the third pair of speakers and being supplied to for controlling each of said first, second, third and fourth relay switch means.
6. The sound reproduction system of claim 4 wherein the signal selecting means is operative to supply the output of the first source signal selecting circuit to the two-channel amplifying means so that normal sound reproduction can be provided through the first pair of speakers in the first room when normal sound reproduction is provided in the second room.
7. A sound reproduction system comprising:
first and second pair of speakers placed in a first room where it is desired to listen to concert sound reproduction;
a third pair of speakers placed in a second room where it is desired to listen to normal sound reproduction;
signal input means for receiving an input signal to be reproduced;
reflectional sound signal generating means for generating reflectional sound signals by producing delay signals of said input signal and adding the delay signals in sequence:
amplifying means for amplifying the level of the reflectional sound signals or the input signal and generating an output representative thereof;
first signal selecting means for supplying either the input signal or the reflectional sound signals as input to the amplifying means;
second signal selecting means for connecting the output of the amplifying means to the second pair of speakers or to said third pair of speakers; and control means for controlling the first and second signal selecting means so that when it is desired to listen to concert hall sound reproduction of the input signal in the first room, the first signal selecting means is caused to supply the reflectional sound signals as input to the amplifying means and the second signal selecting means is caused to connect the output of the amplifying means to the second pair of speakers, and then it is desired to listen to normal sound reproduction in the second room, the first signal selecting means is caused to supply the input signals as input to the amplifying means and the second signals selecting means is caused to connect the output of the amplifying means to third pair of speakers in the second room.
first and second pair of speakers placed in a first room where it is desired to listen to concert sound reproduction;
a third pair of speakers placed in a second room where it is desired to listen to normal sound reproduction;
signal input means for receiving an input signal to be reproduced;
reflectional sound signal generating means for generating reflectional sound signals by producing delay signals of said input signal and adding the delay signals in sequence:
amplifying means for amplifying the level of the reflectional sound signals or the input signal and generating an output representative thereof;
first signal selecting means for supplying either the input signal or the reflectional sound signals as input to the amplifying means;
second signal selecting means for connecting the output of the amplifying means to the second pair of speakers or to said third pair of speakers; and control means for controlling the first and second signal selecting means so that when it is desired to listen to concert hall sound reproduction of the input signal in the first room, the first signal selecting means is caused to supply the reflectional sound signals as input to the amplifying means and the second signal selecting means is caused to connect the output of the amplifying means to the second pair of speakers, and then it is desired to listen to normal sound reproduction in the second room, the first signal selecting means is caused to supply the input signals as input to the amplifying means and the second signals selecting means is caused to connect the output of the amplifying means to third pair of speakers in the second room.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPUMI-2325 | 1989-01-12 | ||
| JP1989002325U JPH0450720Y2 (en) | 1989-01-12 | 1989-01-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1321756C true CA1321756C (en) | 1993-08-31 |
Family
ID=11526167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000609539A Expired - Fee Related CA1321756C (en) | 1989-01-12 | 1989-08-28 | Sound field reproducing apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0450720Y2 (en) |
| CA (1) | CA1321756C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2552187Y2 (en) * | 1990-09-08 | 1997-10-27 | オンキヨー 株式会社 | Audio player |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57152251A (en) * | 1981-03-16 | 1982-09-20 | Matsushita Electric Ind Co Ltd | Broadcasting device |
| JPS62258600A (en) * | 1986-04-28 | 1987-11-11 | Fujitsu Ten Ltd | On-vehicle audio device |
-
1989
- 1989-01-12 JP JP1989002325U patent/JPH0450720Y2/ja not_active Expired
- 1989-08-28 CA CA000609539A patent/CA1321756C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0450720Y2 (en) | 1992-11-30 |
| JPH0293900U (en) | 1990-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |