CN101536541A - Apparatus for reproduction of stereo sound - Google Patents
Apparatus for reproduction of stereo sound Download PDFInfo
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- CN101536541A CN101536541A CNA200780035223XA CN200780035223A CN101536541A CN 101536541 A CN101536541 A CN 101536541A CN A200780035223X A CNA200780035223X A CN A200780035223XA CN 200780035223 A CN200780035223 A CN 200780035223A CN 101536541 A CN101536541 A CN 101536541A
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Abstract
Apparatus for reproducing stereo sound having a housing (1, 25) defining an at least partially enclosed space. A first transducer (7) or pair of transducers (28, 29) is provided and arranged to reproduce one, both or the sum of two audio signals. A pair of transducers (10, 32) is also provided and arranged to reproduce a signal comprising the difference of the two audio signals. All the transducers communicate with the at least partially enclosed space, and the transducers arranged to reproduce the difference between the two audio signals are each arranged to direct their output primarily in a direction generally at right angles to the direction in which the first transducer or pair of transducers primarily direct their output. The apparatus may be arranged to be placed on or adjacent a generally flat surface, and the transducers arranged to reproduce the difference of the two audio signals may be arranged to direct their output towards the flat surface.
Description
Technical field
The present invention relates to be used for reproduction of stereo sound equipment, more specifically, relate to and being used for from two channel stereo signal reproduction of stereo sound equipment.
Background technology
Stereo record and reproduction utilize stereoprojection that the relative position of the sound source of record is encoded, and are intended to reproduce sound by these relative positions of sensing.Stereophonic sound system can comprise two or more sound channels, but the dual track system dominates aspect audio recording.Dual track (being commonly called a left side and R channel) is propagated the information relevant with the sound field of hearer front.Position up till now, the most popular means that are used to reproduce two channel stereo signal are to play sound channel respectively by the left and right loud speaker that separates on the space.
Though very popular, still there is shortcoming in this system.Most of commercial two channel stereo sound recording are in order to record by separating about 1.6 meters best reproduction effect of loud speaker realization on the space.In fact, this is unlikely, especially wants from the individual unit reproduction of stereo.Under any circumstance, no matter how recording records, the loud speaker that is used to send a left side and R channel is near more, and the stereophonic effect of reproduction is poor more.
And for the most perfect experience stereo sound effect, the hearer should be positioned at the summit of the equilateral triangle that is made of a pair of loud speaker and hearer.Can be in fact, inconvenient usually or may not adopt or keep this position for a hearer, certainly, listen to from identical position for a plurality of hearers are more impossible.
The alternative system that is used to reproduce two channel stereo signal should overcome the shortcoming that some propose above.At US 3,588, this system that should be known as " sum and difference system " is disclosed in 355.This document discloses the stereophonic loud-speaker system that comprises two pairs of loud speakers.It is orthogonal that the every pair of loud speaker is oriented their axle, and the intersection point of loudspeaker distance axle is equidistant substantially.So arrange loud speaker can so that a loud speaker in the every pair of loud speaker towards the hearer, the axle of another loud speaker is in and the rectangular direction of hearer's direction basically.Provide a kind of being used for that left and right two channel stereo signal is changed (matrix) so that the device with signal and difference signal to be provided.Be applied to axial sensing hearer's loud speaker with signal by homophase, and difference signal is applied to axially and the vertical loud speaker of hearer place direction, the difference signal that is applied to two loud speakers that are positioned at vertical direction 180 ° of phase phasic differences each other.As a result of, this system will generate stereophonic effect.
Though can overcome with the space on the problem that is associated of the use of the loud speaker that separates, US3,588,355 arrangement also is not widely used.This is considered to because disclosed equipment has difficulties on the implementation, and disclosed equipment can cause actual sound quality that obtains and the stereophonic effect of being felt than theory expectation difference.
Summary of the invention
The present invention attempts to provide the improved reproduction of stereo sound equipment that is used for.
According to a first aspect of the invention, a kind of reproduction of stereo sound equipment that is used for is provided, this equipment comprises second transducer that is arranged to reproduce first transducer of an audio signal in two audio signals and is arranged to reproduce another signal, and this equipment also comprises one or two transducers of the signal that is arranged to reproduce the difference that comprises described two audio signals.
This arrangement combines the advantage that is used for the traditional twin loudspeaker system of reproduction of stereo sound and the advantage of sum and difference system.Suitably directed difference signal can be used to improve the perceived width and the degree of depth of the signal of reproduction.This under the perceived width of the signal that reproduces separately by first and second transducers and situation that the degree of depth is restricted of great use.This situation be two transducers be arranged very approaching situation, for example two transducers are arranged in the same enclosure of portable stereophonics equipment.
This equipment can comprise the shell that defines partially enclosed at least space.All transducers can be installed in the enclosure, and can be connected with described partially enclosed space.First and second transducers preferably are arranged to direction substantially parallel, apart is pointed in the output of self.Two transducers that are arranged to reproduce the difference of two signals preferably are arranged to the output of self pointed to basically with described first transducer and second transducer and are arranged to roughly rectangular direction of the direction that the output of self is pointed basically, and its output is positioned on the opposite substantially direction.
According to a second aspect of the invention, a kind of reproduction of stereo sound equipment that is used for is provided, this equipment comprises the shell that defines partially enclosed at least space, be arranged to generate a audio signal in two audio signals or two audio signals and first transducer, and two transducers, in these two transducers each all is arranged to reproduce the signal of the difference that comprises described two audio signals, wherein above-mentioned three transducers all are connected with described partially enclosed at least space, and each of described transducer that wherein is arranged to reproduce the signal of the difference that comprises described two audio signals is arranged to the output of self pointed to basically with described first transducer and is arranged to roughly rectangular direction of the direction that the output of self is pointed basically.
Described first transducer is arranged to reproduce an audio signal in two audio signals, preferably provide second transducer to reproduce another signal, and first and second transducers are pointed to direction substantially parallel, apart by preferred arrangement one-tenth with the output of self.
It has been generally acknowledged that the stereophonics sum and difference system by at diverse location work being carried out in the modification that audio plays and signal carry out different amounts, the sound field of recording at first with establishment again or the approximate sound field of this sound field by playing difference signal.Be provided at first and second transducers and be used for sending respectively under the situation of audio signal, obtain similar effect with meeting, if when especially two transducers are very near by what one or more transducers were play two signals.Whole three transducers (perhaps according to circumstances can be four transducers) are connected with identical partially enclosed space and have two tangible benefits.The first, the mechanical realization that this has simplified equipment (particularly shell) does not need to construct spacer assembly or valve makes transducer separation.For the transducer of being given, this can reduce the size of population of required shell, and/or can allow to install in shell other assemblies.Same, this can be so that be arranged to send in the free space in the shell that a pair of loud speaker of difference signal can be integrated into existing monophony or stereo equipment, thereby under the situation of the size that does not need to increase shell, make equipment can be redesigned the stereo audio signal of reproduction of stereo or improvement.The second, this has increased mutual between the output of transducer, and the sound that is reproduced by equipment of can giving alternately of this increase adds perceived depth and the width that improves.
According to a third aspect of the present invention, a kind of reproduction of stereo sound equipment that is used for is provided, this equipment comprises on the surface that is arranged to place general planar or the shell on the surface of contiguous general planar, be arranged to generate a audio signal in two audio signals or two audio signals and first transducer, and two transducers, in these two transducers each is arranged to reproduce the signal of the difference that comprises described two audio signals, each of described transducer that wherein is arranged to reproduce the signal of the difference that comprises described two audio signals is arranged to make mainly to become to be arranged at first transducer in the output on the direction that is usually located at the right corner place and makes on the direction that its output mainly is positioned at, and the described transducer that wherein is arranged to reproduce the signal of the difference that comprises described two audio signals is arranged with respect to outer box, thereby make and to be placed on the surface of general planar or during contiguous general planar surperficial, two transducers all are oriented and make its output mainly on the direction of the plane on surface extension when shell.
Output by making the transducer that reproduces difference signal is towards the surface, and wherein equipment is used against described surface, and any skin effect that is caused by the surface is enhanced, and wherein said skin effect is found the output that is used for improving equipment usually.
Described first transducer is arranged to reproduce an audio signal in two audio signals, preferably provide second transducer to reproduce another signal, and first and second transducers are pointed to direction substantially parallel, apart by preferred arrangement with the output of self.
If suitable, can comprise any or all of supplementary features of another aspect of the present invention according to the equipment of any aspect of the present invention.
The optional feature that relates to all aspects of the present invention below.
Each transducer can be a loudspeaker.Loudspeaker can comprise the driver that is arranged to drive loudspeaker element, can be the vibrating membrane that is such as any suitable shape of the shape of frusto-conical or substantially flat such as, wherein said loudspeaker element.
The described transducer that is arranged to reproduce the signal (" difference signal ") of the difference that comprises described audio signal is used for reproducing basically the signal of out-phase each other by preferred arrangement, and the direction of two out-of-phase signals is decided to be different direction (being preferably roughly opposite direction).Out-of-phase signal is preferably phase phasic difference 180 degree.
Shell preferably has two openings, sends two difference signals by described two openings.Shell is arranged to place on the smooth surface or contiguous smooth surface, and preferably, thereby opening is to be placed on to make on the shell that opening is positioned at the neighbouring surface place when working as the surface that shell is placed on the smooth surface or vicinity is smooth.Preferably, shell comprises the surface of at least one general planar.The bottom surface that this can form shell can place on the smooth surface shell, perhaps can form the side of shell, makes shell can be close to flat surfaces such as metope.Replacedly or additionally, shell can comprise the one or more smooth surface of extending from contiguous this opening or contiguous each opening part.This opening or each opening be arranged to be positioned at the neighbouring surface place and make skin effect to be used.Further discuss as following, difference signal is arranged to play along flat surfaces has strengthened difference signal, and and then strengthened the width of the sound that sum and difference system reproduces and the common sensation of the degree of depth.
Shell also can comprise opening, by described opening can send comprise two audio signals being provided and signal.Interchangeable, shell comprises one or two opening, sends audio signal respectively by described opening.Shell can also comprise other opening, forms valve (port), and this valve is as the pressure-reducing valve that feeds partially enclosed at least space when low frequency is reproduced.This valve can lead to the conduit (conduit) or the pipe (tube) that extend to the small part encapsulation that is being formed by shell.Except providing valve, shell can be a complete closed.
Two transducers that are arranged to reproduce difference signal are oriented direction with its output and are decided to be mainly on the direction of extending on the plane on the surface that surface or shell to general planar lean against, preferably, the direction that makes each transducer with the angle between 1～8 degree towards the surface, more preferably, with 2～6 the degree between angle towards the surface, further more preferably, with 3～5 the degree between angle towards the surface.Shell comprises the surface of substantially flat, as mentioned above, the transducer that is arranged to reproduce difference signal can be directed with respect to this surperficial plane, and this plane corresponds essentially to that this described transducer is placed or the plane on the surface of any substantially flat of being close to.
Described equipment can be used to use described sum and difference system to reproduce two channel stereo signal.In this case, utilize the signal comprise or preferably only to form to drive the transducer that is used to reproduce two out-phase difference signals, and utilization comprise or only drive the 3rd transducer by two stereo channels with signal that form by the difference of two stereo channels.
Equipment can comprise and differ from matrix to realize these.
Replacedly, equipment can be used to use traditional arrangement of separate transducers on two spaces to reproduce two channel stereo signal, wherein each transducer is used for one of two stereo channels, also need replenish the transducer that is used to reproduce different two phase signals, these two transducers are driven by the signal that comprises and preferably only be made up of the difference of two stereo channels.
Under any circumstance, can filter difference signal to reduce the amplitude of low frequency.The low frequency of single sound channel that is included in signal or is used for driving the stereophonic signal of two transducers can be enhanced.Equipment can comprise high pass filter and/or base lift compensation circuits.Can find, strengthen by reproduce two audio signals and or the low frequency that sends of the transducer of single component, and reduce or eliminate the low frequency that sends by the transducer that reproduces difference signal and all can cause the degree of depth of the sound that reproduces and the further improvement of impression.This also further discusses below.
Can in being arranged to hold the shell that the device of stereophonic signal to drive transducer will be provided, provide described equipment.Particularly, described device can be included in the Docking station (docking station) of MP3 player or other portable music playing devices.Replacedly, device can comprise and is used to produce stereophonic signal to drive the device or the associated component of transducer, for example audio tunning device.
Description of drawings
For clearer understanding the present invention, the mode with example is described with reference to the drawings embodiments of the present invention now, wherein:
Fig. 1 is the perspective view according to loudspeaker unit of the present invention;
Fig. 2 is the sectional view along the planar interception of the a-a of Fig. 1 and b-b line formation;
Fig. 3 is the sectional view along the planar interception of the a-a of Fig. 1 and c-c line formation;
Fig. 4 is the block diagram of the circuit relevant with the unit of Fig. 1;
Fig. 5 is the front cross sectional view according to the another kind of execution mode of loudspeaker unit of the present invention;
Fig. 6 is the side sectional view of the execution mode of Fig. 5;
Fig. 7 is the block diagram of the circuit relevant with the unit of Fig. 5;
Fig. 8 is the schematic perspective view that has added according to the television set of loudspeaker unit of the present invention;
Fig. 9 is the sectional view of the television set that leans against Fig. 8 that wall places seen from the top.
Embodiment
Hereinafter, used such as front portion, rear portion, top, bottom or the like term, these terms refer to the direction with respect to the equipment that illustrates or will be used.These terms just use for convenience, and should not be construed as restriction.
With reference to the accompanying drawings, Fig. 1-4 has shown according to loudspeaker unit of the present invention and poor.This unit can merge the device (not shown) that is used for reproducing audio signal, and tuner for example is such as DAB tuner, Disc player or MP3 player.
This unit comprises shell 1, and the outside of described shell 1 is cube normally.This shell is by the hardboard manufacturing, but also can for example be generally used for making the material of speaker housings by other any suitable made.The place ahead at shell forms circular substantially hole (not shown), and described hole is hidden by grid or the permeable substantially covering of other sound.
On each sidewall of two opposing sidewalls 4 of shell 1, form circular substantially hole 3 respectively, and each hole is hidden by grid 5 or the permeable substantially covering of other sound.Each of described hole is positioned at about middle part along the road, and is being close to the base of the sidewall 4 that forms the hole.
Rear portion towards the bottom side 6 of shell 1 also provides another circular substantially hole.The bottom side of shell is a substantially flat, makes that shell can be by being supported on the surface that its bottom side is placed substantially flat.
Top and rear portion at shell do not form the hole.
Single loud speaker 7 is installed in the inboard of front portion of unit to insert the hole of the front portion that is formed on the unit.Loud speaker is a traditional type, and comprises and be arranged to drive the driver 8 of the barrier film 9 of frustoconical shape substantially.Loud speaker 7 is arranged to send audio signal by the hole in the front portion, unit.
Single loud speaker 10 also in the inboard of each sidewall 4 that is installed in the unit, is inserted the hole in the sidewall.Each loud speaker 10 also comprises the driver 8 and the barrier film 9 of frustoconical shape substantially.Each loud speaker 10 is installed on the sidewall with respect to sidewall 4 at a certain angle, thereby makes the central shaft (shown in broken lines) of its barrier film 9 extend towards the extension on the plane of bottom side, unit 6, and axle is outward extending from the unit simultaneously.Thereby each loud speaker 10 is mounted and makes the central shaft of its barrier film 9 to intersect with the extension of about 4 angles of spending with the plane of bottom side, unit.Thereby the axle that is installed in the barrier film of two loud speakers 10 on the sidewall 4 of unit respectively can be intersected with each other with the angles of about 172 degree.
In interchangeable arrangement, each loud speaker 10 can be installed in the inboard near the sidewall 4 of shell 1, but the position of separating with the inboard of the sidewall 4 of shell 1 on the space.
Cardboard tube 11 is installed in the inboard of bottom side, unit 6, on the hole in being formed on the bottom side, unit and stretch in the unit.Pipe 11 forms valve.Valve is shared identical acoustic enviroment with whole three loud speakers in device.
The electronic circuit that shows among loudspeaker unit and Fig. 4 is relevant.Circuit unit preferably can be placed in the shell 1 or separately and place.Circuit unit can be placed in the enclosure together with other assemblies, especially and the assembly that is arranged to generate audio signal place tuner for example together.
Circuit comprises two inputs 14,15 that are connected to and differ from matrixing unit 16.Be arranged to produce two outputs with difference matrixing unit 16: be positioned at 17 the place and output, should and output comprise the input that is positioned at 14 and 15 places and (14+15); And the difference output that is positioned at 18 places, this difference output comprises poor (14-15) of the input that is positioned at 14 and 15 places.
Be connected to base lift compensation circuits 19 with output 18.The gain that this has increased about 3dB for the low-frequency component of signal, the low-frequency component of described signal normally 40 and 500Hz between frequency.The output of base lift compensation circuits is connected to the loud speaker 7 (" mono speaker ") of the back, hole of the front portion that is installed in the unit by power amplifier 20.
Difference output 18 is connected to high pass filter 21, and this high pass filter 21 can be operated the amplitude that is used for to the frequency that is lower than 100Hz and reduce 3dB at least.The signal that filters is exaggerated the gain that device 22 provides about 4dB then, and the output of amplifier 22 is connected to the loud speaker 10 (" difference loud speaker ") of 3 back, hole of the side 4 that is positioned at the unit by power amplifier 20.Output is connected to two poor loud speakers, thereby makes that when described the signal of two loud speaker generations is out-phase (promptly anti-phase) when being driven by difference signal.
Loudspeaker unit will use sum and difference system to reproduce traditional two channel stereo signal.In use, preferably, described unit quilt is as on the smooth surface 23, and extend to all directions of unit on this smooth surface.The dual track of stereophonic signal (left side and right) is offered and is differed from two inputs 14 and 15 of matrixing unit 16 then respectively.Ideal situation, the hearer should be positioned at towards the front portion of unit, but also can be positioned at the back of unit.Though the unit can make the hearer appreciate the degree of depth and the width effect of stereo record in the zone of broadness, the degree of depth and width effect detect the best results that obtains on the axle that passes mono speaker 7 extensions or near the position (being the front portion of basic vertical enclosure 1) of axle.The degree of depth and width effect are the poorest in the position (being the side 4 of basic vertical enclosure 1) that is positioned on the axle that passes conduit difference loud speaker (duct difference loudspeaker) 10 extensions.
What described loudspeaker unit was traditional relatively has great advantage with the difference loud speaker.Shell 1 defines the monophone encapsulation that all loud speakers are shared.This makes make to simplify, and need not cut apart the inside of shell for the separate acoustic encapsulation is provided, and provides more spaces for electronics and associated component in the enclosure.The maximization utilization of space is very important in the manufacturing of compact apparatus.Make three loud speakers share that identical acoustics encapsulation has also improved and the output of difference loud speaker between possible mutual.The valve that forms by cardboard tube 11 with and relevant hole as the pressure-reducing valve of low frequency.
The base that the difference loud speaker is being close to the shell side makes when shell is placed on the surface, for example places on the floor or during the top of a piece of furniture, can utilize skin effect.Place loud speaker by this way and utilized skin effect.When closely reproducing sound, have from the sound reflection on surface and to make the effect of strengthening around the sound on surface near smooth surface (ideally, linear dimension is greater than the smooth surface of the wavelength of the lowest frequency in the sound).Like this, compare, be reduced to lower grade away from the acoustic pressure grade of sound source with the inverse square law of theory.In the practice, the sound level of the difference signal that sends by difference loud speaker 10 is enhanced about 8～10dB.This has improved the degree of depth and width effect in the sound that reproduces.Make loud speaker a little facing to surface that described unit placed thereby the difference loud speaker installed at a certain angle, further help utilization skin effect.Another benefit that difference loud speaker 10 is placed at a certain angle is, because loud speaker is not shared public axle, so reduced the trend that forms medium-frequency standing wave in the enclosure.This is undesired, because this may weaken the oeverall quality of the sound that is reproduced by described unit.Another advantage is that the angled main space audiovideo that is generated by device of giving of difference loud speaker provides guide element.
The voice signal that enters by processing also can obtained performance improve.Compare with the low-frequency sound that bigger mono speaker 7 reproduces, relatively poor relatively by the low-frequency sound that difference loud speaker 10 reproduces.This part is owing to the ability of the intrinsic reduction of less loudspeaker reproduction low frequency, and also owing to the mutual elimination between the out-of-phase signal that is produced by two loud speakers, because the intrinsic long wavelength of low frequency, described mutual elimination is expected at low frequency and takes place.Though can reduce mutual elimination problem by two poor loud speakers of further separation, required separation is unrealistic.The substitute is, by strengthen to drive mono speaker 7 with signal in the amplitude of low frequency, come the low frequency that difference loud speaker 10 reproduces is compensated.This makes low frequency be cut out from difference signal by high frequency filter 21 devices conversely, has improved the integrality of audio difference signal.
Fig. 5～7 show the interchangeable execution mode according to loudspeaker unit of the present invention.Except be arranged to play comprise two audio tracks and single loud speaker 10 replace by two loud speakers that are arranged to play respectively single audio track, this unit is basic similar with the unit of demonstration in Fig. 1～4.
The execution mode of Fig. 5～7 comprises shell 25, and described shell is cube normally in appearance.This shell is by the hardboard manufacturing, but also can for example be generally used for making the material of speaker housings by other any suitable made.Form two circular substantially holes (not shown) in the front portion of shell 25 (not shown), described two holes are hidden by grid or the permeable substantially covering of other sound.On each sidewall of two opposing sidewalls 26 of shell 25, respectively form less, a circular hole 33 substantially, and each hole is hidden by grid 34 or the permeable substantially covering of other sound.Each of described hole is positioned at about middle part along the road, and is being close to the base of the sidewall 26 that forms the hole.
Rear portion towards the bottom side 27 of shell 25 also has a circular substantially hole.The bottom side of shell is a substantially flat, makes that shell can be by its bottom support on the surface of substantially flat.
Top and rear portion at shell do not form the hole.
Single loud speaker 32 also is installed in the inboard of each sidewall 26 of unit, inserts the hole in the sidewall.Each loud speaker 32 also comprises the driver 30 and the barrier film 31 of frustoconical shape substantially.In the mode identical with the unit shown in Fig. 2, each loud speaker 32 to be being installed on the sidewall with respect to sidewall 26 certain angles, thereby makes the central shaft of its barrier film extend towards the extension on the plane of bottom side, unit 27, and axle stretches out from the unit simultaneously.
In interchangeable arrangement, each loud speaker 10 can be installed in the inboard near the sidewall 4 of shell 1, but the position of separating with the inboard of the sidewall 4 of shell 1 on the space.
Loudspeaker unit is relevant with the electronic circuit shown in Fig. 7.Circuit unit preferably can be placed in the shell 26 or separately and place.Circuit unit can be placed in the enclosure together with other assemblies, especially and the assembly that is arranged to generate audio signal place tuner for example together.
Circuit comprises two inputs 36,37.Described input is connected respectively to loud speaker 28 and 29 by base lift compensation circuits 38 and power amplifier 39 respectively.The gain that base lift compensation circuits 38 has increased about 3dB for the low-frequency component of signal, the low-frequency component of described signal normally 40 and 500Hz between frequency.
Two circuit input ends 36 and 37 also are connected to subtraction circuit 40, the signal that this subtraction circuit output receives at input 36 and 37 places poor.The difference output is connected to high pass filter, and this high pass filter 41 can be operated the amplitude that is used for being lower than the frequency of 100Hz and reduce 3dB at least.The signal that filters is exaggerated the gain that device 42 provides about 4dB then, and the output of amplifier 42 is connected to the loud speaker 30 (" difference loud speaker ") of 3 back, hole of the side 4 that is positioned at the unit by power amplifier 43.Output is connected to two poor loud speakers, thereby when described two poor loud speakers were driven by difference signal, the signal that makes two loud speakers generate was out-phase (promptly anti-phase).More specifically, the poor loud speaker that is being close to loud speaker 28 drives with signal, the signal that wherein said signal comprised receives at input 36 is less than signal that it comprised receives at input 37, another difference loud speaker (because its opposite polarity) also drives effectively with signal, and the signal that wherein said signal comprised receives at input 37 is less than signal that it comprised receives at input 36.
With 43 needs of power amplifier of being associated of difference loud speaker 10 have the power amplifier that is associated with other loud speakers 28,29 power output about 10%～20%.
Described loudspeaker unit will reproduce traditional two channel stereo signal of some characteristics of utilizing sum and difference system.In use, described unit is preferably placed on the smooth surface 44, and extend around each side of unit on this smooth surface.The dual track of stereophonic signal (left side and right) is offered two inputs 36 and 37 then respectively.Two preceding loud speakers 28 and 29 can be exported a left side and right signal respectively then, show as the mode of traditional twin loudspeaker stereophonic sound system.Two side loud speakers can be exported the signal that comprises L-R and the right side-left signal respectively, wherein are being close to the side loud speaker output L-R signal of the preceding loud speaker of exporting left signal, and vice versa.Compare with two preceding loud speakers of independent use, provide side loud speaker output difference signal to improve from the available degree of depth of stereophonic signal and width.Ideal situation, the hearer should be positioned at towards the front portion of unit, but also can be positioned at the back of unit.
Described unit with traditional twin loudspeaker boombox technology with and the difference technology the aspect combine, the result has realized improving the system of above-mentioned two technology.The present invention also provides traditional twin loudspeaker stereo unit can be modified mode with the reproduction that improves stereophonic signal, and this mode realizes by increasing poor loud speaker.For the unit that a traditional left side and right loud speaker are installed together by near-earth very, described improvement is quite remarkable.With traditional comparing with the difference loudspeaker unit, described loudspeaker unit is the same with above-mentioned first execution mode to have more advantage than traditional with the difference loudspeaker arrangement.
Fig. 8 and 9 has shown how the arrangement of Fig. 5～7 is added in television set or the display.Television set comprises shell 50, and what be installed in its front portion is screen 51.The loud speaker 52 that separates on two spaces also is installed in the front portion of shell 50.These two loud speakers are corresponding to the loud speaker 28 and 29 of the execution mode of Fig. 5～7, and are arranged to play a left side and the R channel of traditional two channel stereo signal.In the both sides at shell rear portion is panel 53, and this panel 53 extends to the front portion of shell with about 45 ° angle.Loud speaker 54 corresponding to the loud speaker 32 of the arrangement of Fig. 5～7 is installed in respectively on the described panel, and described loud speaker 54 is arranged to play respectively the left side that comprises traditional binaural audio signal and the out-of-phase signal of the difference between the right audio track.The rear portion of television set is smooth and parallel with the front portion usually.In use, the rear portion of television set will be placed in and be close to smooth surface, such as the wall 55 in room.Like this, towards wall, utilized the advantage of skin effect facing to loud speaker 54 parts at the rear portion of television set.
Execution mode above only having described in the mode of example can made various variations without departing from the invention.
Claims (32)
1, a kind of reproduction of stereo sound equipment that is used for, this equipment comprises second transducer that is arranged to reproduce first transducer of an audio signal in two audio signals and is arranged to reproduce another signal, this equipment also comprises the transducer that one or two is other, and each in described one or two other transducer is arranged to reproduce the signal of the difference that comprises described two audio signals.
2, equipment according to claim 1, this equipment comprises the shell that defines partially enclosed at least space, one or more being installed on the described shell and with described partially enclosed space in the wherein said transducer is connected.
3, equipment according to claim 2, wherein all described transducers all are installed on the described shell and with described partially enclosed space and are connected.
4, according to the described equipment of aforementioned each claim, wherein said first transducer is arranged to substantially parallel and direction apart is pointed in the output of self with second transducer.
5, equipment according to claim 4, described one or two the other transducer that wherein is arranged to reproduce the signal of the difference that comprises described two audio signals are arranged to the output of self pointed to basically with described first transducer and second transducer and are arranged to roughly rectangular direction of the direction that the output of self is pointed basically.
6, a kind of reproduction of stereo sound equipment that is used for, this equipment comprises the shell that defines partially enclosed at least space, be arranged to generate a audio signal in two audio signals or these two audio signals and first transducer, and two transducers, in these two transducers each all is arranged to reproduce the signal of the difference that comprises described two audio signals, wherein above-mentioned three transducers all are connected with described partially enclosed at least space, and wherein are arranged to reproduce in the transducer of signal of the difference that comprises described two audio signals each and are arranged to the output of self pointed to basically with described first transducer and are arranged to roughly rectangular direction of the direction that the output of self is pointed basically.
7, equipment according to claim 6, wherein said first transducer are arranged to reproduce an audio signal in two audio signals, and second transducer is provided and is used for reproducing another signal.
8, equipment according to claim 7, wherein said first transducer is arranged to substantially parallel and direction apart is pointed in the output of self with second transducer.
9, a kind of reproduction of stereo sound equipment that is used for, this equipment comprises on the surface that is arranged to place general planar or the shell on the surface of contiguous general planar, be arranged to reproduce a audio signal in two audio signals or these two audio signals and first transducer, and two transducers, in these two transducers each all is arranged to reproduce the signal of the difference that comprises described two audio signals, each of described transducer that wherein is arranged to reproduce the signal of the difference that comprises described two audio signals is arranged to the output of self pointed to basically with described first transducer and is arranged to roughly rectangular direction of the direction that the output of self is pointed basically, and the described transducer that wherein is arranged to reproduce the signal of the difference that comprises described two audio signals is arranged with respect to described shell, be placed on the surface of general planar with the described shell of box lunch or during contiguous general planar surperficial, two transducers all are oriented the direction of extending towards the plane on described surface is pointed in the output of himself basically.
10, equipment according to claim 9, wherein said first transducer is arranged to reproduce an audio signal in described two audio signals, and second transducer be provided to reproduce another signal, and described first transducer and second transducer are arranged to substantially parallel and direction apart is pointed in the output of self.
11, according to the described equipment of aforementioned each claim, wherein each transducer is a loud speaker.
12, according to the described equipment of aforementioned each claim, one or two transducer that wherein is arranged to reproduce the signal of the difference that comprises two audio signals is arranged to reproduce basically the signal of out-phase each other, and two out-of-phase signals are pointed to different directions.
13, according to the described equipment of each claim in the claim 2,3,6,7,8,9 and 10, wherein said shell has two openings, sends the signal of the difference that comprises described two audio signals by described two openings.
14, equipment according to claim 13, wherein said shell is arranged to place on the surface of general planar or the surface of contiguous general planar, and described opening is positioned on the described shell, so that be placed on the smooth surface or contiguous smooth when surperficial the contiguous described surface of described opening when described shell.
15, according to claim 13 or 14 described equipment, wherein said shell comprises at least one fully smooth surface.
16, equipment according to claim 15, wherein said fully smooth surface forms the bottom surface and/or the side of described shell.
17, according to the described equipment of each claim in the claim 13～16, wherein said shell comprises from the one or more smooth surface of contiguous described opening or contiguous each opening extension.
18, according to the described equipment of each claim in the claim 2,3,6,7,8,9,10 and 13～17, wherein said shell comprises opening, by described opening send comprise described two audio signals and signal.
19, according to the described equipment of each claim in the claim 2,3,6,7,8,9,10 and 13～17, wherein said shell comprises one or two opening, sends described two audio signals respectively by described opening.
20, according to claim 18 or 19 described equipment, wherein said shell comprises other opening, and this opening forms valve, and this valve is as the pressure-reducing valve in described partially enclosed at least space.
21, equipment according to claim 20, wherein said valve lead to the conduit or the pipe that extend to the small part encapsulation that is being formed by described shell.
22, according to claim 20 or 21 described equipment, wherein except providing described valve, described shell is a complete closed.
23, equipment according to claim 9 or when right require in 10～22 a certain direct or indirect quote claim 9 time according to the described equipment of this claim, it is the direction that the angle between 1～8 degree is extended that two transducers that wherein are arranged to reproduce the signal of the difference that comprises described two audio signals are oriented the plane that the output of self is pointed to described relatively surface.
24, it is that angle between 1～8 degree is extended the direction of extending towards the plane on one or more smooth surfaces from contiguous described opening or contiguous each opening part that equipment according to claim 17, the transducer that wherein is arranged to reproduce the signal of the difference that comprises described two audio signals are oriented that direction with the output of himself is decided to be basically with described relatively surface.
25, according to claim 23 or 24 described equipment, the direction of wherein said transducer is decided to be the angle between plane 2～6 degree on described relatively surface.
26, according to claim 23 or 24 described equipment, the direction of wherein said transducer is decided to be the angle between plane 3～5 degree on described relatively surface.
27, use the described equipment of aforementioned each claim to reproduce the method for two channel stereo signal, the described transducer that wherein is used to reproduce the signal of the difference that comprises described two audio signals is driven by the signal of the difference that comprises described two stereo channels, and another transducer by comprise a stereo channels in described two stereo channels or these two stereo channels and signal drive.
28, use the described equipment of each claim in the claim 1～26 to reproduce the method for two channel stereo signal, the described transducer that wherein is used to reproduce the signal of the difference that comprises described two audio signals is driven by the signal of the difference that comprises described two stereo channels, and another drives respectively two sound channels of transducer by described audio signal.
29, according to the described equipment of aforementioned each claim, this equipment comprises the high pass filter of the low frequency amplitude in the difference that is arranged to reduce described two audio signals.
30, according to the described equipment of aforementioned each claim, this equipment comprises can be operated the base lift compensation circuits that is used for strengthening low frequency.
31, according to the described equipment of each claim in the claim 2,3,6,7,8,9,10 and 13～17, wherein said shell is arranged to hold and is used to provide stereophonic signal to drive the device of described transducer.
32, according to the described equipment of aforementioned each claim, this equipment comprises and is used for producing two channel stereo signal to drive the device of described transducer.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0616910.6 | 2006-08-25 | ||
| GB0616910A GB0616910D0 (en) | 2006-08-25 | 2006-08-25 | Apparatus for reproduction of stereo sound |
| GB0618854.4 | 2006-09-25 | ||
| GB0618854A GB0618854D0 (en) | 2006-09-25 | 2006-09-25 | Apparatus for reproduction of stereo sound |
| PCT/GB2007/003191 WO2008023167A1 (en) | 2006-08-25 | 2007-08-21 | Apparatus for reproduction of stereo sound |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101536541A true CN101536541A (en) | 2009-09-16 |
| CN101536541B CN101536541B (en) | 2012-08-08 |
Family
ID=37102860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780035223XA Active CN101536541B (en) | 2006-08-25 | 2007-08-21 | Apparatus for reproduction of stereo sound |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101536541B (en) |
| GB (1) | GB0616910D0 (en) |
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|---|---|---|---|---|
| US5005201A (en) * | 1989-02-14 | 1991-04-02 | Rca Licensing Corporation | Apparatus and method thereof for improvement of stereophonic sound |
| AU658020B2 (en) * | 1991-11-08 | 1995-03-30 | Colin Arthur Preston | Coincident spatial loudspeaker |
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- 2006-08-25 GB GB0616910A patent/GB0616910D0/en not_active Ceased
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101536541B (en) | 2012-08-08 |
| GB0616910D0 (en) | 2006-10-04 |
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Effective date of registration: 20161229 Address after: London, England Patentee after: Proud Bissell Address before: British MULTIBASES Patentee before: Airsound LLP |