CN101536541B - Apparatus for reproduction of stereo sound - Google Patents
Apparatus for reproduction of stereo sound Download PDFInfo
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- CN101536541B CN101536541B CN200780035223XA CN200780035223A CN101536541B CN 101536541 B CN101536541 B CN 101536541B CN 200780035223X A CN200780035223X A CN 200780035223XA CN 200780035223 A CN200780035223 A CN 200780035223A CN 101536541 B CN101536541 B CN 101536541B
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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 through 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 respectively sound channel through 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 up of a pair of loud speaker and hearer.Can be in fact, inconvenience perhaps possibly not adopt or keep this position usually for a hearer, certainly, more can not listen to from identical position for a plurality of hearers.
The alternative system that is used to reproduce two channel stereo signal should overcome the shortcoming that proposes above some.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 basic equidistance of the intersection point of loudspeaker distance axle.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 belongs to the vertical loud speaker of direction with the hearer, 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 of being arranged to be used for to reproduce first transducer of an audio signal in two audio signals and being arranged to be used for reproducing another signal, and this equipment also comprises one or two transducers of the signal of being arranged to be used for reproducing the difference that comprises said two audio signals.
This arrangement has combined to be used for the advantage of 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 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 said partially enclosed space.First and second transducers preferably are arranged to direction substantially parallel, apart is pointed in the output of self.Two transducers being arranged to be used for to reproduce the difference of two signals preferably are arranged to the output of self pointed to said first transducer and second transducer basically 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; By arrange with generate an audio signal or two audio signals in two audio signals and first transducer; And two transducers; In these two transducers each is all arranged to be used for reproducing the signal of the difference that comprises said two audio signals, and wherein above-mentioned three transducers all are connected with said partially enclosed at least space, and each of said transducer of wherein being arranged to be used for reproducing the signal of the difference that comprises said two audio signals is arranged to the output of self pointed to said first transducer basically and is arranged to roughly rectangular direction of the direction that the output of self is pointed basically.
Said 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 become the output sensing direction substantially parallel, apart with self by preferred arrangement.
It has been generally acknowledged that the stereophonics sum and difference system through 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.Being connected with identical partially enclosed space has two tangible benefits with whole three transducers (perhaps according to circumstances can be four transducers).The first, this has simplified the mechanical realization of equipment (particularly shell), need not 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 in shell, to install other assemblies.Same; This can be so that be arranged to be used for 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 need not 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; By arrange with generate an audio signal or two audio signals in two audio signals and first transducer; And two transducers; In these two transducers each is arranged to be used for reproducing the signal of the difference that comprises said two audio signals; Each of said transducer of wherein being arranged to be used for reproducing the signal of the difference that comprises said 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 said transducer of wherein being arranged to be used for reproducing the signal of the difference that comprises said two audio signals arranged with respect to outer box, thereby makes and 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 through making the transducer that reproduces difference signal is towards the surface, and wherein equipment is used against said surface, and any skin effect that is caused by the surface is enhanced, and wherein said skin effect comes to light usually and is used for improving the output of equipment.
Said 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 whole 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 of being arranged to be used for driving 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 said transducer of being arranged to be used for reproducing the signal (" difference signal ") of the difference that comprises said 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 through said 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 the 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 discussed 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, through said opening can send comprise two audio signals being provided and signal.Interchangeable, shell comprises one or two opening, sends audio signal respectively through said 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 conduit (conduit) or the pipe (tube) that in the encapsulation of part at least that is formed by shell, extends.Except providing valve, shell can be a complete closed.
Two transducers being arranged to be used for 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 the angle between 2～6 degree towards the surface; Further more preferably, with 3～5 the degree between angle towards the surface.Shell comprises the surface of substantially flat; As stated; The transducer of being arranged to be used for to reproduce difference signal can be directed with respect to this surperficial plane, and this plane corresponds essentially to the plane that this said transducer is placed the surface of any substantially flat that perhaps is being close to.
Said equipment can be used to use said 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 by comprising that the signal with preferably only being made up of the difference of two stereo channels drives.
Under any circumstance, can filter difference signal to reduce the amplitude of low frequency.Being included in the low frequency of single sound channel that drives the stereophonic signal of two transducers with signal or be used for can be enhanced.Equipment can comprise high pass filter and/or base lift compensation circuits.Can find, strengthen by reproduce two audio signals with or the low frequency that sends of the transducer of single component, and reduce or eliminate the degree of depth of the sound that the low frequency that is sent by the transducer that reproduces difference signal all can cause reproducing and the further improvement of impression.This also further discusses below.
Can be used for holding in the shell that the device of stereophonic signal to drive transducer will be provided quilt arrangement said equipment is provided.Particularly, said 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 execution mode 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 the direction of these terms equipment that refer to respect to illustrate or that will be used such as front portion, rear portion, top, bottom or the like term.These terms just use for ease, and should not be construed as restriction.
With reference to accompanying drawing, 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 said 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 material manufacture.The place ahead at shell forms circular substantially hole (not shown), and said hole is by grid or the permeable basically cover of other sound.
On each sidewall of two opposing sidewalls 4 of shell 1, form circular substantially hole 3 respectively, and each hole is by grid 5 or the permeable basically cover of other sound.Each of said 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 through 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 arranged to be used for driving the driver 8 of the barrier film 9 of frustoconical shape substantially.Loud speaker 7 is arranged to be used for to send audio signal through 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 on angle and the plane of bottom side, unit of about 4 degree.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 angle 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 with other assemblies together, especially and by arrangement places together with the assembly that generates audio signal, for example tuner.
Circuit comprises two inputs 14,15 that are connected to and differ from matrixing unit 16.Arranged to be used for producing 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 said 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 through power amplifier 20.
With difference loud speaker 10 relevant 20 needs of power amplifier have with mono speaker 7 relevant power export about 10%～20%.
Loudspeaker unit will use sum and difference system to reproduce traditional two channel stereo signal.In use, preferably, said 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 in the zone of broadness, appreciate the degree of depth and the width effect of stereo record, the degree of depth and width effect pass on the axle that mono speaker 7 extends or near spool the best results that obtains of position (being the front portion of basic vertical enclosure 1) detection.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 said 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 to make simplifies, and need not cut apart the inside of shell for the separate acoustic encapsulation is provided, and for electronics and associated component more spaces is provided 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 and to be placed in surperficial last time when shell, 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 (under the ideal situation, 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 through 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 said 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 possibly weaken the oeverall quality of the sound that is reproduced by said unit.Another advantage is that the angled main space audiovideo that is generated by device of giving of difference loud speaker provides guide element.
Also can obtained performance improve through handling the voice signal that gets into.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, said mutual elimination is expected at low frequency and takes place.Though can reduce mutual elimination problem through two poor loud speakers of further separation, required separation is unrealistic.The substitute is, through 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 from difference signal, cut through 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 by arrange to be used for playing comprise two audio tracks and single loud speaker 10 replace by two loud speakers being arranged to be used for 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 said 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 material manufacture.Form two circular substantially holes (not shown) in the front portion of shell 25 (not shown), said two holes are by grid or the permeable basically cover 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 by grid 34 or the permeable basically cover of other sound.Each of said 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.With 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 with other assemblies together, especially and by arrangement places together with the assembly that generates audio signal, for example tuner.
Circuit comprises two inputs 36,37.Said input is connected respectively to loud speaker 28 and 29 through 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 said signal normally 40 and 500Hz between frequency.
Two circuit input ends 36 and 37 also are connected to subtraction circuit 40, and this subtraction circuit output is poor the signal of input 36 and the reception of 37 places.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 through power amplifier 43.Output is connected to two poor loud speakers, thereby when said two poor loud speakers were driven by difference signal, the signal that makes two loud speakers generate was out-phase (being 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 antipole property) also drives with signal effectively, 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%.
Said loudspeaker unit will reproduce traditional two channel stereo signal of some characteristics of utilizing sum and difference system.In use, said 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.
Aspect traditional twin loudspeaker boombox is technological and with the difference technology, said unit combines, and 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 the mode with the reproduction that improves stereophonic signal, and this mode realizes through increasing poor loud speaker.For the unit that a traditional left side and right loud speaker are installed together by near-earth very, said improvement is quite remarkable.With traditional comparing with the difference loudspeaker unit, said 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 quilt arrangement is used for playing 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 said panel, and said loud speaker 54 is arranged to be used for playing 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 with the mode of example can made various variations without departing from the invention.
Claims (32)
1. one kind is used for reproduction of stereo sound equipment; This equipment comprises second transducer of being arranged to be used for to reproduce first transducer of an audio signal in two audio signals and being arranged to be used for reproducing another signal; This equipment also comprises the transducer that one or two is other; In said one or two other transducer each is arranged to be used for reproducing the signal of the difference that comprises said two audio signals; Wherein, Said equipment also comprises the shell that is arranged to place on the flat surfaces or adjoins flat surfaces; And each in said one or two other transducer is all with respect to said shell and by being arranged, and is placed on the flat surfaces or when adjoining flat surfaces, each in said one or two other transducer all is oriented points to the direction of extending towards the plane on said surface with the output of himself with the said shell of box lunch.
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 said shell and with said partially enclosed space in the wherein said transducer is connected.
3. equipment according to claim 2, wherein all said transducers all are installed on the said shell and with said partially enclosed space and are connected.
4. according to the described equipment of aforementioned each claim, wherein said first transducer is arranged to parallel and direction apart is pointed in the output of self with second transducer.
5. equipment according to claim 4, said one or two other transducer of wherein being arranged to be used for reproducing the signal of the difference that comprises said two audio signals is arranged to the output sensing of self is arranged to the rectangular direction of the direction that the output of self is pointed with said first transducer and second transducer.
6. one kind is used for reproduction of stereo sound equipment; This equipment comprises the shell that defines partially enclosed at least space; By arrange with generate an audio signal or these two audio signals in two audio signals and first transducer; And two transducers; In these two transducers each is all arranged to be used for reproducing the signal of the difference that comprises said two audio signals; Wherein above-mentioned three transducers all are connected with said partially enclosed at least space; And wherein arranged to be used for reproducing in the transducer of signal of the difference that comprises said two audio signals each and be arranged to the output of self pointed to said first transducer and be arranged to the rectangular direction of the direction that the output of self is pointed, said shell is arranged to place on the smooth surface or adjoins smooth surface, and said two transducers that are arranged to be used for reproducing the signal of the difference that comprises said two audio signals are arranged with respect to said shell; Be placed on the flat surfaces or when adjoining flat surfaces, two transducers all are oriented the direction of extending towards the plane on said surface is pointed in the output of himself with the said shell of box lunch.
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 parallel and direction apart is pointed in the output of self with second transducer.
9. one kind is used for reproduction of stereo sound equipment; This equipment comprises the shell that is arranged to place on the smooth surface or adjoins smooth surface; Arranged to be used for reproducing an audio signal or these two audio signals in two audio signals and first transducer; And two transducers; In these two transducers each is all arranged to be used for reproducing the signal of the difference that comprises said two audio signals; Each of said transducer of wherein being arranged to be used for reproducing the signal of the difference that comprises said two audio signals is arranged to the output of self pointed to said first transducer and is arranged to the rectangular direction of the direction that the output of self is pointed; And the said transducer of wherein being arranged to be used for reproducing the signal of the difference that comprises said two audio signals is arranged with respect to said shell; Be placed on the smooth surface or adjoin smoothly when surperficial with the said shell of box lunch, two transducers all are oriented the direction of extending towards the plane on said surface are pointed in the output of himself.
10. equipment according to claim 9; Wherein said first transducer is arranged to reproduce an audio signal in said two audio signals; And second transducer be provided to reproduce another signal, and said first transducer and second transducer are arranged to parallel and direction apart is pointed in the output of self.
11. according to any described equipment of claim among claim 1-3 and the 6-10, wherein each transducer is a loud speaker.
12. according to any described equipment of claim among claim 1-3 and the 6-10; Wherein arranged to be used for reproducing one or two transducer of the signal of the difference that comprises two audio signals and arranged to be used for reproducing 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 said two audio signals through said two openings.
14. equipment according to claim 13; Wherein said shell is arranged to place on the smooth surface or adjoins smooth surface; And said opening is positioned on the said shell; So that when said shell be placed on the smooth surface or adjoin smooth when surperficial, the contiguous said surface of said opening.
15. equipment according to claim 13, wherein said shell comprises the surface that at least one is smooth.
16. equipment according to claim 15, wherein said smooth surface forms the bottom surface and/or the side of said shell.
17. equipment according to claim 13, wherein said shell comprise from the one or more smooth surface of contiguous said 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, wherein said shell comprises opening, through said opening send comprise said two audio signals and signal.
19. according to the described equipment of each claim in the claim 2,3,6,7,8,9,10, wherein said shell comprises one or two opening, sends said two audio signals respectively through said opening.
20. equipment according to claim 18, wherein said shell comprises other opening, and this opening forms valve, and this valve is as the pressure-reducing valve in said partially enclosed at least space.
21. equipment according to claim 20, wherein said valve lead to conduit or the pipe that in the encapsulation of part at least that is formed by said shell, extends.
22. according to claim 20 or 21 described equipment, wherein except providing said valve, said shell is a complete closed.
23. equipment according to claim 9, it is the direction that the angle between 1～8 degree is extended that two transducers wherein being arranged to be used for reproducing the signal of the difference that comprises said two audio signals are oriented the plane that the output of self is pointed to said 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 said opening or contiguous each opening part that equipment according to claim 17, the transducer of wherein being arranged to be used for reproducing the signal of the difference that comprises said two audio signals are oriented that direction with the output of himself is decided to be with said 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 said 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 said relatively surface.
27. method of using claim 6 or 9 described equipment to reproduce two channel stereo signal; The said transducer that wherein is used to reproduce the signal of the difference that comprises said two audio signals is driven by the signal of the difference that comprises said two stereo channels, and another transducer by comprise a stereo channels or these two stereo channels in said two stereo channels and signal drive.
28. method of using the described equipment of claim 1 to reproduce two channel stereo signal; The said transducer that wherein is used to reproduce the signal of the difference that comprises said two audio signals is driven by the signal of the difference that comprises said two stereo channels, and another drives respectively two sound channels of transducer by said audio signal.
29. according to any described equipment of claim in the claim 1,6 or 9, this equipment comprises the high pass filter of the low frequency amplitude in the difference of being arranged to be used for to reduce said two audio signals.
30. according to any described equipment of claim in the claim 1,6 or 9, this equipment comprises the base lift compensation circuits that is used for strengthening low frequency by operation.
31. according to any described equipment of claim in the claim 1,6 or 9, wherein said shell is arranged to be used for holding to be used to provide stereophonic signal to drive the device of said transducer.
32. according to any described equipment of claim in the claim 1,6 or 9, this equipment comprises and is used for producing two channel stereo signal to drive the device of said 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 |
| GB0618854A GB0618854D0 (en) | 2006-09-25 | 2006-09-25 | Apparatus for reproduction of stereo sound |
| GB0618854.4 | 2006-09-25 | ||
| PCT/GB2007/003191 WO2008023167A1 (en) | 2006-08-25 | 2007-08-21 | Apparatus for reproduction of stereo sound |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101536541A CN101536541A (en) | 2009-09-16 |
| CN101536541B true 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) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8284955B2 (en) | 2006-02-07 | 2012-10-09 | Bongiovi Acoustics Llc | System and method for digital signal processing |
| US11431312B2 (en) | 2004-08-10 | 2022-08-30 | Bongiovi Acoustics Llc | System and method for digital signal processing |
| US10158337B2 (en) | 2004-08-10 | 2018-12-18 | Bongiovi Acoustics Llc | System and method for digital signal processing |
| US10848118B2 (en) | 2004-08-10 | 2020-11-24 | Bongiovi Acoustics Llc | System and method for digital signal processing |
| US10701505B2 (en) | 2006-02-07 | 2020-06-30 | Bongiovi Acoustics Llc. | System, method, and apparatus for generating and digitally processing a head related audio transfer function |
| US10848867B2 (en) | 2006-02-07 | 2020-11-24 | Bongiovi Acoustics Llc | System and method for digital signal processing |
| US10069471B2 (en) | 2006-02-07 | 2018-09-04 | Bongiovi Acoustics Llc | System and method for digital signal processing |
| US9264004B2 (en) | 2013-06-12 | 2016-02-16 | Bongiovi Acoustics Llc | System and method for narrow bandwidth digital signal processing |
| US9398394B2 (en) * | 2013-06-12 | 2016-07-19 | Bongiovi Acoustics Llc | System and method for stereo field enhancement in two-channel audio systems |
| US9883318B2 (en) | 2013-06-12 | 2018-01-30 | Bongiovi Acoustics Llc | System and method for stereo field enhancement in two-channel audio systems |
| US9906858B2 (en) | 2013-10-22 | 2018-02-27 | Bongiovi Acoustics Llc | System and method for digital signal processing |
| US10639000B2 (en) | 2014-04-16 | 2020-05-05 | Bongiovi Acoustics Llc | Device for wide-band auscultation |
| US10820883B2 (en) | 2014-04-16 | 2020-11-03 | Bongiovi Acoustics Llc | Noise reduction assembly for auscultation of a body |
| US9615813B2 (en) | 2014-04-16 | 2017-04-11 | Bongiovi Acoustics Llc. | Device for wide-band auscultation |
| US9638672B2 (en) | 2015-03-06 | 2017-05-02 | Bongiovi Acoustics Llc | System and method for acquiring acoustic information from a resonating body |
| US9621994B1 (en) | 2015-11-16 | 2017-04-11 | Bongiovi Acoustics Llc | Surface acoustic transducer |
| JP2018537910A (en) | 2015-11-16 | 2018-12-20 | ボンジョビ アコースティックス リミテッド ライアビリティー カンパニー | Surface acoustic transducer |
| EP3776528A4 (en) | 2018-04-11 | 2022-01-05 | Bongiovi Acoustics LLC | Audio enhanced hearing protection system |
| US10959035B2 (en) | 2018-08-02 | 2021-03-23 | Bongiovi Acoustics Llc | System, method, and apparatus for generating and digitally processing a head related audio transfer function |
| CN111641898B (en) * | 2020-06-08 | 2021-12-03 | 京东方科技集团股份有限公司 | Sound production device, display device, sound production control method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0383535A2 (en) * | 1989-02-14 | 1990-08-22 | Thomson Consumer Electronics, Inc. | Apparatus for improvement of stereophonic sound |
| AU658020B2 (en) * | 1991-11-08 | 1995-03-30 | Colin Arthur Preston | Coincident spatial loudspeaker |
-
2006
- 2006-08-25 GB GB0616910A patent/GB0616910D0/en not_active Ceased
-
2007
- 2007-08-21 CN CN200780035223XA patent/CN101536541B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0383535A2 (en) * | 1989-02-14 | 1990-08-22 | Thomson Consumer Electronics, Inc. | Apparatus for improvement of stereophonic sound |
| AU658020B2 (en) * | 1991-11-08 | 1995-03-30 | Colin Arthur Preston | Coincident spatial loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101536541A (en) | 2009-09-16 |
| 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 |