CN102484755A - A Sound Reproduction System - Google Patents
A Sound Reproduction System Download PDFInfo
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- CN102484755A CN102484755A CN201080033491XA CN201080033491A CN102484755A CN 102484755 A CN102484755 A CN 102484755A CN 201080033491X A CN201080033491X A CN 201080033491XA CN 201080033491 A CN201080033491 A CN 201080033491A CN 102484755 A CN102484755 A CN 102484755A
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- 238000000034 method Methods 0.000 claims description 15
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- 238000000926 separation method Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 description 28
- 230000033458 reproduction Effects 0.000 description 16
- 230000006870 function Effects 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 6
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000003190 augmentative effect Effects 0.000 description 3
- 230000019771 cognition Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
Abstract
A sound reproduction system includes a speaker unit (101) which comprises: a cone (207), a first transducer (211, 213) for converting a first electrical signal to movement of the cone (207), and a second transducer (215, 217) for converting a second electrical signal to movement of the cone (207). The system further comprises a drive circuit (103) for at least partially independently driving the first electromagnetic transducer (211, 213) and the second electromagnetic transducer (215, 217) by generating the first electrical signal to be different than the second electrical signal. The different signals may e.g. arise from different spatial audio channels, such as stereo signals, such that a single compact speaker unit (101) may provide both high quality low frequency performance and a spatial experience.
Description
Technical field
The present invention relates to a kind of sound reproduction system, and especially but non-exclusively relate to the audio reproduction to space audio.
Background technology
Spatial sound is reproduced and is widely used in comprising in many application of consumer device and other sound reproduction systems.For example, it is very usual that stereo sound reproduces for many audio systems, and for example, is used to broadcast receiver and sound of television and reproduces.Yet the shortcoming that this system has is that they need a plurality of loud speakers, so that can provide the space of expectation to experience.
Really, stereo equipment all needs loud speaker for each sound channel, and this is inconvenient for many little form factors (form factor) equipment.For example, location speaker system difficulty normally in little TV or portable radio, and cause form factor to increase.This is disadvantageous especially, because need relatively large speaker size, so that guarantee the low frequency operation of enough quality.In addition, a plurality of loud speakers tend to increase fully the cost and the complexity of said equipment.
Therefore, low frequency performance, the cost of reduction, the complexity of reduction and/or the system of augmented performance that sound performance (render) and the spatial sound that allows less form factor, quality to improve shows, improves will be favourable.
Summary of the invention
Therefore, the present invention attempts preferably separately or alleviates, alleviates or eliminate one or more in the above-mentioned shortcoming with any combination.
According to one aspect of the present invention; A kind of sound reproduction system is provided, and this sound reproduction system comprises: loudspeaker unit, and said loudspeaker unit comprises: cone; First transducer; Be used for first electrical signal conversion is become the motion of said cone, and second transducer, be used for second electrical signal conversion is become the motion of said cone; And drive circuit, be used for being different from said first signal of telecommunication of said second signal of telecommunication through generation, coming at least, part drives said first transducer and said second transducer independently.
The present invention can allow a kind of improved sound reproduction system.Especially, can from the single loudspeaker unit that allows more flexible and diversified audio reproduction, generate differentiated sound.In many examples, the present invention can allow complexity, size and/or cost to reduce.For example, can realize a plurality of sound sources reproductions through single loudspeaker unit.Can provide spatial sound to experience from single loudspeaker unit.The present invention can allow the audio quality that improves in many cases.Especially, can realize improved low frequency performance, because, can utilize whole cone area through these two transducers and through a plurality of sound sources.Therefore, can realize low frequency expansion, wherein, provide the low frequency performance of two signals by cone area, and need such cone area be provided for each signal corresponding to the whole zone of said cone.
Particularly, said first and/or second transducer can be an electromagnetic transducer, and can comprise moveable part and standing part with respect to the retaining element of said loudspeaker unit.Said moveable part can be attached to said cone.For example, these two parts can send the signal of telecommunication through them corresponding to permanent magnet and voice coil loudspeaker voice coil.Said voice coil loudspeaker voice coil can be attached to said cone, and said permanent magnet can be attached to the fixed structure of said loudspeaker unit.
Particularly, said part drives independently and can refer to that said first signal of telecommunication can be different with said second signal of telecommunication.Particularly, said drive circuit is arranged to and can generates two various signals to drive said two electromagnetic transducers.
According to optional feature of the present invention, said drive circuit is arranged to generation first signal of telecommunication and comes corresponding to first sound source, and it is next corresponding to second sound source to generate second signal of telecommunication.
The present invention can allow from single loudspeaker unit a plurality of sound sources to be provided, thereby for the sound representation system that is used for a plurality of audio-source, allows cost, complexity, the size of minimizing, and/or augmented performance.
According to optional feature of the present invention; Said drive circuit is arranged to and generates first signal of telecommunication and come first sound channel signal corresponding to first audio track at interval of first frequency at least, and generates second signal of telecommunication and come second sound channel signal corresponding to second audio track of said first frequency at interval.
The present invention can allow to show a plurality of sound channels from single loudspeaker unit, thereby for the multi-channel sound representation system, allows cost, complexity, the size of minimizing, and/or augmented performance.
According to optional feature of the present invention, first audio track and second audio track are the space sound channels.
The present invention can be favourable for the sound channel of many spaces of performance especially.Particularly, said first and second audio tracks can be stereophonic signal a left side and R channel.
Therefore, the present invention can allow the stereophonics from single loudspeaker unit, thereby compact more and/or improved audio quality stereophonic sound system are provided.For example, the present invention can allow to improve and/or less stereo consumer device, for example TV or broadcast receiver.
According to optional feature of the present invention, said drive circuit is arranged to further and receives the low-frequency effects sound channel signal, and in response to said low-frequency effects sound channel signal generate said first signal of telecommunication and said second signal of telecommunication the two.
The efficient reproduction of additional auditory channel can be provided like this, and the loud speaker that need not add, and can allow compactness, low-complexity and/or high performance 2.1 space audio playback systems particularly.
According to optional feature of the present invention; Said drive circuit is arranged to through said first sound channel signal and said second sound channel signal of combination second frequency at interval and generates composite signal, and the two comes corresponding to the said composite signal of said second frequency at interval to generate said first signal of telecommunication and said second signal of telecommunication.
So improved performance can be provided under many situations.Especially, it can allow to be closely related between two transducers by the signal component of said whole cone performance.So improved audio quality can be provided under many situations.
According to optional feature of the present invention, said second frequency comprises the frequency lower at interval than said first frequency at interval.
This can provide improved performance under many situations.Especially, it can allow to be closely related between two transducers by the low-frequency signal components of said whole cone performance.This can provide improved audio quality under many situations.Especially, can generate the low frequency monophonic signal through the low frequency signal that makes up said first and second audio tracks.
Said combination can be for example LPF through said first and second sound channel signals generate, follow LPF such as the combination the summation for example.
According to optional feature of the present invention, the first of said cone is attached to first displaceable element of said first transducer, and the second portion of said cone is attached to second displaceable element of said second transducer.
This method can provide useful operation, structure and/or performance.Advantageously, can be under many situations with said first and second portion at least 3 or 5 centimetres distance separately.
According to optional feature of the present invention; Said first provides first cone area that has by the completely specified motion of motion of said first displaceable element; Second portion provides second cone area that has by the completely specified motion of motion of said second displaceable element, and said cone further comprises the 3rd cone area with motion of being confirmed by the motion of said first displaceable element and said second displaceable element.
This can provide useful operation, structure and/or performance.Particularly, this layout can provide through the i.e. independently audio frequency generation of part of first cone area, second cone area and the 3rd cone area in three zones.Said first cone area can mainly be controlled through the motion of controlling said first displaceable element, and said second cone area can mainly be controlled through the motion of controlling said second displaceable element.The two controls (and typically, depend on symmetrically said first and second displaceable elements the two motion) to the 3rd cone area through said first and second displaceable elements.
Particularly, said first and second cone area can be corresponding to undersized relatively zone, and particularly, said the 3rd cone area can be corresponding to big relatively zone.
Particularly, said method can allow to send higher frequency from said first and second zones relatively independently, and mainly makes up and send lower frequency by said the 3rd cone area.Therefore; Can mainly send the high fdrequency component of the most of direction promptings (directional cue) that comprise the hearer from the separation and the different zones of said cone; And send the lower frequency that comprises less direction prompting, thereby improved low frequency performance is provided from whole cone.
Said first cone area is confirmed in motion through said first displaceable element fully; If thereby the definite knowledge of known said first displaceable element; Then fully provide the motion of said first cone area, and need not consider the motion of said second displaceable element.Whether the motion of this and said first displaceable element is caused or for example whether is the functional independence of the motion of second displaceable element propagated via said cone by first transducer.
Equally; Said second cone area is fully confirmed in motion through said second displaceable element; If thereby the definite knowledge of known said second displaceable element then fully provides the motion of said second cone area, and need not consider the motion of said first displaceable element.Whether the motion of this and said second displaceable element is caused or for example whether is the functional independence of the motion of first displaceable element propagated via said cone by second transducer.
On the contrary, the motion in said the 3rd zone is the two the functions of motion of said first and second displaceable elements, and can not be according to confirming about only one the information of motion in these two displaceable elements.
According to optional feature of the present invention, the sound channel separation between said first cone area and said second cone area is 10dB at least.
This can provide improved performance under many situations.In certain embodiments, advantageously, said sound channel separation is not less than 20dB or 30dB.
When one of said first and second transducers be not fed any signal of telecommunication and another when effectively being driven, can said sound channel separation be confirmed as the sound level that produced by one of the said first and second zones relative mistake with respect to another.
In many examples, the maximum displacement of said first area is also littler than half of maximum displacement of (said second signal of telecommunication is non-vanishing) said second area when said second signal of telecommunication comprises the audio signal of performance when said first transducer is not fed the signal of telecommunication.For example, can be to carrying out such measurement from the given sound level of said second area.
According to optional feature of the present invention, said first displaceable element and said second displaceable element are voice coil loudspeaker voice coils, and said first cone area and said second cone area are the zones that is positioned at the cone within the said voice coil loudspeaker voice coil circumference.
This can provide actual enforcement and/or improved performance.Particularly, said first and/or second cone area can be corresponding to the cone dome or the dust cover of said loudspeaker unit.
According to optional feature of the present invention; Said third part has than is lower than the high efficient of first cone area of crossover frequency for said first signal of telecommunication, and has than is higher than the low efficient of first cone area of said crossover frequency for said first signal of telecommunication.
Equally, said third part can have than be lower than the high efficient of second cone area of crossover frequency for said second signal of telecommunication, and can have than be higher than the low efficient of second cone area of said crossover frequency for said second signal of telecommunication.
This can provide improved sound quality.Advantageously, in many application, said crossover frequency can be between 150Hz and 600Hz, and particularly between 200Hz and 400Hz.
According to optional feature of the present invention, the circular cone circumference of said cone has the size less than 20 centimetres of 5 cm x.
The present invention can allow to generate high-quality relatively audio frequency through the loudspeaker arrangement of compactness, and the spatial sound performance is provided simultaneously.Especially, when from positive (along main central shaft) when watching, said loudspeaker unit can have the width that is not higher than 5 centimetres height and is not wider than 20 centimetres.In addition, the present invention can allow to use such loud speaker: the shape that this loud speaker has with according to known round-shaped the comparing of conventional loud speaker more closely near rectangular shape.This can provide more flexibility when realizing audio system.
According to optional feature of the present invention, the maximum cross section distance between the point of the circular cone circumference of said cone is not more than 20 centimetres.
The present invention can allow for compact loudspeaker arrangement and generate high-quality relatively audio frequency.
According to one aspect of the present invention; A kind of method that drives loudspeaker unit is provided; Said loudspeaker unit comprises: cone, and first transducer is used for first electrical signal conversion is become the motion of said cone; And second transducer, be used for second electrical signal conversion is become the motion of said cone; Said method comprises: be different from said first signal of telecommunication of said second signal of telecommunication through generation, coming at least, part drives said first electromagnetic transducer and said second electromagnetic transducer independently.
These and other aspect of the present invention, feature and advantage will become from the embodiment of following description obviously, and illustrate with reference to these embodiment.
Description of drawings
Only with reference to accompanying drawing embodiments of the invention are described as an example below, wherein:
Fig. 1 illustrates the instance according to the sound reproduction system of some embodiments of the invention;
Fig. 2 illustrates the instance of double motor loudspeaker unit;
Fig. 3 illustrates the instance according to the sound reproduction system of some embodiments of the invention; And
Fig. 4 illustrates the instance according to the sound reproduction system of some embodiments of the invention.
Embodiment
Fig. 1 illustrates the instance according to the sound reproduction system of some embodiments of the invention.This system comprises loudspeaker unit 101, and it is the double motor loudspeaker unit.Particularly, loudspeaker unit 101 is from sounding through the cone that two different actuators move.Loudspeaker unit 101 comprises first (electromagnetism) transducer, and it can receive first signal of telecommunication, and said first electrical signal conversion is become the mechanical movement of said cone.In addition, loudspeaker unit 101 comprises second (electromagnetism) transducer, and it can receive second signal of telecommunication, and said second electrical signal conversion is become the mechanical movement of said cone.For example, each transducer can comprise the permanent magnet that is coupled to mobile voice coil loudspeaker voice coil, and said mobile voice coil loudspeaker voice coil is attached to said cone.Therefore, said loud speaker is the multiple-motor loudspeaker unit, and they can be by two different actuator of the different piece that is attached to said cone.
In this instance, said two sound sources are used to represent different sound channels, and are used to represent different space sound channels particularly.Therefore, single loudspeaker unit 101 is used to provide the space sound channel more than, and the space sound channel feels similarly to be to be derived from different directions simultaneously, although they are to be produced by identical cone.
In this particular instance, driver element 103 comprises first driver 105, and it receives first audio track, and therefrom generates first signal of telecommunication.In addition, driver element 103 comprises second driver 107, and it receives second audio track, and therefrom generates second signal of telecommunication.In this instance, first and second drivers 105,107th, completely independent from one another, and between the signal of said different audio track, do not have interact (except cone) via loudspeaker unit 101.For example, driver 105,107 can comprise suitable tone filter, amplifier, volume controller etc., as to those of ordinary skill known those.
These two audio tracks can be the space sound channels, for example two of stereophonic signal sound channels.Therefore, said drive circuit can receive a left side and the R channel of stereophonic signal, and can therefrom generate corresponding to the drive signal of L channel with corresponding to the independent drive signal of R channel.Yet said drive signal is not fed to different loud speakers or loudspeaker drive, but is fed to the different switching device/actuator of identical loudspeaker unit 101.Therefore, in this system, identical cone be actuated to reproduce L channel and R channel the two.
Arrange said double motor drive circuit, make sound that this pair driving causes sending, and the sound that sends also has spatial distribution, and comprise the different spatial cues of right and L channel not only corresponding to the monophonic signal of combination.
In more detail,, mainly generate audio reproduction, and therefore the higher frequency content of said left signal will be main be sent near the cone area the attachment point of the transducer of presenting the left signal of telecommunication through the cone area that approaches to activate a little for upper frequency.Equally, the higher frequency content of said right signal will be mainly sent near the cone area the attachment point of the transducer of presenting the right signal of telecommunication.Therefore, send the higher frequency content of the sound that sends of a left side and R channel, thereby the direction prompting of the space experience that allows the hearer is provided through the different piece of cone.
For the frequency that is just reducing, sound from the zone that cone increases gradually, and, typically sound from whole cone area for low frequency.Therefore, in stability at lower frequencies, the sound that is sent does not correspond to individual independent sound channel, and has provided the combined sound of two sound channels.Therefore, for low frequency, send monophonic sounds.Yet, because can send the sound at two sound channel low frequency places, so can realize the efficient and the low frequency performance that improve greatly through whole cone area.
In fact, said double motor loudspeaker unit allows the low frequency performance corresponding to each sound channel of whole cone area, and not requiring simultaneously to each sound channel provides this zone separately.Therefore, divided the whole cone area (two loud speakers that promptly need have this cone area usually) of said system effectively equally, so that given low frequency performance is provided.Although this may prompt for cost with direction for low frequency more, this generally is acceptable, or even inessential, because people's perception is mainly responsive to the high frequency direction prompting, and insensitive to the prompting of low frequency direction.Therefore, said method can allow single loudspeaker unit to provide the space to experience and efficient LF-response this two, keeps very compact structure simultaneously.In addition, can reduce cost fully, because only need single loudspeaker unit.
For example, said system can be advantageously used in the compact consumer device, for example panel TV or portable radio.
Fig. 2 illustrates loudspeaker unit 101 in more detail, and shows the cross section of the loudspeaker unit 101 that is installed in the shell 201 especially.
In addition, microphone unit 101 comprises cone 207, and it is attached to installing rack 203 flexibly.In the instance of Fig. 2, cone 207 is attached to installing rack 203 through allowing cone 207 with respect to elasticity or the flexible assembly part (mounting) that installing rack 203 moves.Particularly, cone 207 is fixed to said installing rack via rubberizing edge 209.
Equally, second transducer comprises the retaining element and the displaceable element that is attached to voice coil loudspeaker voice coil 217 forms of cone 207 of permanent magnet 215 forms.
First and second voice coil loudspeaker voice coils 213,217 are attached to the different elements of cone 207, and therefore with the motion that gives relative cone 207 differently.
In fact, in many examples, said width is the twice of said height at least, and usually advantageously can be at least 3 times, 4 times, 5 times or longer.In many consumer-elcetronics devicess, this layout can provide and be applicable to integrated shape.In addition, under many situations, this can guarantee improved space difference between the different sound sources that showed by loudspeaker unit.
In fact, often found that the round-shaped of conventional loudspeakers is unpractical, and attempted to create loudspeaker, and adopted rectangle or oval profile more with similar bass response.A problem that has been found that this loud speaker is; Be difficult to symmetry more and enough accurately drive cone; (for example to avoid from the distortion (distortion) of the asymmetrical movement of said cone in zones of different; Do not causing under the situation of motion deformation to cone along minor axis, said transducer can not be effectively moves the most remote areas of said cone along major axis).Advised consistent more cone motion being provided through likewise move cone at two different cone points.This loud speaker can be included in two transducers that difference is attached to cone, presents identical signal so that as one man drive said cone to these two transducers.
Yet the system of Fig. 1 has used a kind of diverse method, wherein, various signals is fed to different transducers, thereby uses single cone that the sound source of a plurality of separated by spaces is provided.In fact, current method is attempted the non-said cone that as one man drives clearly, and has different motions in the different piece of said cone, so that from single speaker element this many sound source positions are provided.
In the loudspeaker unit of Fig. 2, cone 207 can be believed to comprise three different portions.
First is can be by the part of the completely specified cone of motion of first voice coil loudspeaker voice coil 213.In this particular instance; This part is corresponding to the zone of the cone in the circumference of the annex that is in first voice coil loudspeaker voice coil 213 (attachment); Promptly in this particular instance, first is corresponding to dust cover that is attached to first voice coil loudspeaker voice coil 213 or dome cone 219.Afterwards, the first/zone with said cone is called first dust cover 219.
Should be appreciated that because first dust cover 219 is attached to first voice coil loudspeaker voice coil 213 along the whole circumference of first dust cover 219, so also will allow the accurate motion of definite first dust cover 219 to the accurate cognition of the motion of first voice coil loudspeaker voice coil 213.For example, if the signal of telecommunication is put on first voice coil loudspeaker voice coil 213, then this will control the motion of first voice coil loudspeaker voice coil 213, and this also will control the motion of dust cover 219.If there is not signal to be applied in first voice coil loudspeaker voice coil 213, motion can arrive first dust cover 219 from the motion of second voice coil loudspeaker voice coil 217, and can cause first dust cover 219 to move.Yet, even in this case, still can be to confirming the motion of first dust cover 219 cognition of the motion of first voice coil loudspeaker voice coil (213), because this will correspondingly be moved.
Therefore should be appreciated that and can identical note likewise be used for second transducer, and cone 207 comprises second portion/zone that it has can be from the cognitive completely specified motion to the motion of second voice coil loudspeaker voice coil 217.In this particular instance, this second portion is corresponding to second dust cover 221.
In addition, cone 207 comprises third part 223, and its motion can not be only comes definite fully from only one the cognition of motion to voice coil loudspeaker voice coil 213,217.Particularly, this third part 223 comprises the remainder of cone 207, promptly is not that part of of dust cover 219,221.What should understand is, the motion of any point of this third part 223 is not to confirm through only one the motion of voice coil loudspeaker voice coil 213,217 exclusively, but depends on the two motion of voice coil loudspeaker voice coil 213,217.
When using, with the high fdrequency component of mainly sending the signal that is fed to first transducer through near the zonule of the third part 223 first dust cover 219 and first voice coil loudspeaker voice coil 219.Equally, with the high fdrequency component of mainly sending the signal that is fed to second transducer through near the zonule of the third part 223 second dust cover 221 and second voice coil loudspeaker voice coil 221.Yet, mainly send both low frequencies of first and second signals through third part 223, third part 223 is typically formed the main region of cone 207.
Therefore, loudspeaker unit 101 will tend to send alternative sounds, and send from the different piece of cone 207 for different frequency.At the upper frequency place, in voice coil loudspeaker voice coil 213,217 or near zonule send differentiated sound on part and the space of two input sound channels.For the frequency that is just reducing, the effective coverage of cone (one or more) 207 can increase gradually, and for low frequency, the sound that whole cone area is used for the combination of two sound channels sends.Therefore,, increase the space difference gradually, and, increase effective cone area gradually for the frequency that is just reducing for the frequency that is just increasing.Therefore; This performance of single loudspeaker unit 101 is especially favourable for performance many space audios sound channel (for example stereophonic signal); Because people's perception is responsive to the direction prompting of high frequency, rather than responsive to low frequency, yet needs bigger cone area than the high audio quality at low frequency place.
Therefore in this system, than the low frequency place, the acoustic pressure grade that is provided by third part 223 is higher than the acoustic pressure grade of dust cover 219,221, and at the higher-frequency place, and the acoustic pressure grade that is provided by dust cover 219,221 is higher than the acoustic pressure grade of third part 223.Therefore; Third part 223 has than is lower than the high efficient of first cone area (first dust cover 219) of given crossover frequency for first signal of telecommunication, and has than is higher than the low efficient of first cone area (first dust cover 219) of crossover frequency for first signal of telecommunication.In many examples, advantageously, said crossover frequency 150 and 600Hz between, and more advantageously, between 200Hz and 300Hz (two end points that comprise this interval).
In this system, said loudspeaker unit has 10dB or more sound channel separation between two cone area corresponding to first and second portion (that is, first and second dust covers 219 in particular instance, between 221).Can said sound channel separation be measured as poor between the sound level that is generated by cone area (dust cover) in the situation that only drives one of transducer.
For example, can test signal be put on first voice coil loudspeaker voice coil 213, and signal not put on second voice coil loudspeaker voice coil 217.Can select said frequency high relatively, for example be higher than 1kHz.Can confirm sound level (for example, through analyzing or measuring) then by 219 generations of first dust cover.Yet under this situation, the motion of first voice coil loudspeaker voice coil 213 can propagate into second dust cover 221 through cone 207, causes this part of cone 207 also to move, and therefore generates sound.Then, can confirm this sound level (for example through analyzing or measuring).This structure of loudspeaker unit 101 (for example, the rigidity of cone) is such: the difference between these sound level is 10dB at least, and in many examples, even more advantageously be 20dB or or even 30dB at least.Can guarantee like this to experience from the improved space of single cone 207.
In some situations,, can confirm said sound channel separation based on the relative motion/skew of two dust covers 219 and 221 when drive voice coils 219 and one of 221 time effectively only.For example, by the kinetic skew to first dust cover 219 of second voice coil loudspeaker voice coil 217 fully less than the skew of second dust cover 221.Under many situations, advantageously, the skew of first dust cover 219 can be less than 1/5 or 1/10 of the skew of second dust cover 221.
Therefore, said system can provide the sound source of separating on a plurality of spaces, and from single compact loudspeaker unit 101 high-quality low frequencies is provided.In fact; Have been found that said method provides the favorable user experience for very little loudspeaker unit 101; And in many examples, the width of loudspeaker unit 101 can be less than 20 centimetres (and therefore, maximum cross section distance can less than 20 centimetres).In addition, said height can be less than 5 centimetres.Therefore, said method can allow to reproduce from the high-quality multi-channel sound less than the zone of 5 centimetres of 20 cm x.
Have been found that actual execution mode for highly greatly about 30mm, width provides highly favourable performance between 135mm and 180mm.For these execution modes, dust cover has the diameter of about 15mm.Find that these execution modes provide realizable stereophonic effect and the bass that expands to about 80Hz this two in particular shell.It has been found that for the shell of the similar size of using with conventional loud speaker, said bass only typically expands to about 200Hz.Therefore, discovery will realize low frequency expansion very fully.
In the system of Fig. 1, first signal of telecommunication is corresponding to audio track, and especially corresponding to the left audio track of stereophonic signal, and second signal of telecommunication is corresponding to second audio track, and especially corresponding to the right audio track of stereophonic signal.In this instance, the situation in Here it is the whole frequency interval is because generate first and second signals of telecommunication on whole frequency range, to represent the signal in first audio frequency and second audio track respectively.Therefore, in this instance, come across cone 207 itself in combination than the signal at low frequency place.
In certain embodiments, the signal of telecommunication of driving transducer can be only directly corresponding to each input audio track in the limited frequency range.In such embodiment, when generating the signal of telecommunication, the input audio track can for example be combined in other frequency ranges.
Fig. 3 illustrates an instance of this method.This instance still has the drive circuit 103 of change corresponding to the method for Fig. 1.Particularly, preliminary treatment input stereo audio sound channel is with the composite signal in the generated frequency interval, and the composite signal of the signal of telecommunication from this frequency interval that wherein drives transducer generates.Outside frequency interval, said electric drive signal mainly generates from the input signal of audio track.
In the system of Fig. 3, will be fed to low pass filter 301 from the signal that audio track is imported on a left side, low pass filter 301 generates the signal of the LPF with cut-off frequency, and cut-off frequency can be in the scope of 300-600Hz particularly.Equally, will be fed to low pass filter 303 from the signal that audio track is imported on the right side, low pass filter 303 also generates the signal of the LPF with cut-off frequency, and said cut-off frequency can be in the scope of 300-600Hz particularly.In the system of Fig. 3, these two low pass filters 301,303 come down to identical.Then, the signal of combination LPF in combiner 305 (being simple adder in this particular instance), thus generate composite signal.Therefore, said composite signal is the monophonic signal that the input stereo audio signal from the low frequency interval generates.
To further be fed to first subtracter, 307, the first subtracters 307 from the signal of the right LPF of first low pass filter 301 and from the input right signal, deduct the signal of right LPF, to generate right residual signal.Equally, will further be fed to second subtracter, 309, the second subtracters 309 deduct left LPF from the input left signal signal from the signal of the left LPF of second low pass filter 303, to generate the left remainder signal.
The combiner 305 and first subtracter 307 are coupled to first combiner 311, the first combiners, 311 combined right residual signals and the public composite signal, to generate the signal of right change.Equally, the combiner 305 and second subtracter 309 are coupled to second combiner, 313, the second combiners, 313 combination left remainder signal and public composite signals, to generate the signal of left side change.
Therefore, generate the signal of a left side and right change, it is corresponding to an original left side and the right input signal of upper frequency, but for lower frequency, they are identical.Therefore, generate stereophonic signal, it is corresponding to the original input stereo audio signal of upper frequency, but corresponding to the public monophonic signal of lower frequency.First and second combiners 311,313 (particularly, they can be summers) are coupled to first and second drivers, 105,107, first and second drivers 105,107 and from the signal of these changes, generate a left side and right drive signal.
Therefore, in the instance of Fig. 3, from the performance of the different piece of the cone 207 of microphone unit 101 the space user experience is provided through high fdrequency component.Yet, in stability at lower frequencies, public monophonic signal is provided, cause sending consistent monophonic sounds.This can provide improved performance under many situations, because the low frequency common driver of cone can provide the consistent more motion of cone 207, thereby for example need cone 207 still less crooked.Therefore, can reduce the cone distortion, thereby cause improved low frequency performance.
In certain embodiments, drive circuit 103 can also receive low-frequency effects (LFE) sound channel.Therefore, input signal can be 2.1 spacing waves, rather than stereophonic signal.Under this situation, can also be through the said LFE sound channel of single loudspeaker unit 101 performances.Particularly, drive circuit can be not only from a left side and right input signal but also can generate in response to the signal of said LFE sound channel first and second signals of telecommunication the two.
Illustrate the instance of implementing from the system of single loudspeaker unit 101 performances 2.1 signals among Fig. 4.This instance is corresponding to the system of Fig. 3, but replacement generates composite signal from input signal, directly uses the LFE signal.Therefore, be generated to the input of first driver 105, and be generated to the input of second driver 107 through making up said LFE signal and left signal through making up said LFE signal and right signal.Therefore, said LFE signal as one man drives these two transducers of loudspeaker unit 101, thereby causes forming the efficient and high-quality performance of the low-frequency signal components of said LFE signal.
Should recognize, can be only through making up said LFE sound channel signal and being fed to the system that combiner 311,313 comes constitutional diagram 3 easily and 4 from the composite signal of combiner 305 and with this consequential signal.
Should recognize that for the sake of clarity, foregoing description has been described embodiments of the invention with reference to different function units and processor.Yet, with well-known be, do not damaging under the situation of the present invention, can use any suitable distribution of the function between different function units or the processor.For example, being illustrated as the function of being carried out by independent processor or controller can carry out through identical processor or controller.Therefore, the reference of specific functional units only is considered to be the reference to the appropriate device that is used to provide described function, rather than strict logic OR physical structure or the mechanism of indication.
Can be to comprise any appropriate format embodiment of the present invention of hardware, software, firmware or these any combination.The present invention can implement as the computer software that operates on one or more data processors and/or the digital signal processor alternatively at least in part.The element of the embodiment of the invention and parts can physically, functionally and logically be implemented with arbitrarily suitable mode.In fact, said function can be in individual unit, implement in a plurality of unit or as the part of other functional units.Like this, the present invention can implement in individual unit, perhaps can be physically and functionally be distributed between different units and the processor.
Although combined some embodiment to describe the present invention, the present invention is not that intention is subject to the particular form that this paper illustrates.But scope of the present invention is only limited by accompanying claims.In addition, combine specific embodiment to describe although characteristic possibly look like, those of ordinary skill in the art will recognize that the different characteristic of described embodiment can combine according to the present invention.In claim, term " comprises " existence of not getting rid of other elements or step.
In addition, although list separately, can implement multiple arrangement, element or method step by for example individual unit or processor.In addition, although each characteristic possibly be included in the different claims, their maybe be by advantageously combination, and is included in the different claims and does not mean that combination of features is infeasible and/or is not favourable.Equally, characteristic is included in one type of claim and does not mean that and is limited to this classification, but representes that said characteristic is equally applicable to other claim classifications according to circumstances.In addition, the order of characteristic does not mean that any certain order that these characteristics must be worked like this in the claim, and especially, the order of each step in the claim to a method does not also mean that and must carry out said step with this order.On the contrary, can carry out said step with any suitable order.In addition, singular reference is not got rid of a plurality of.Therefore, do not get rid of a plurality of to quoting of " a kind of ", " ", " first ", " second " etc.Reference numeral in the claim only is to provide as the instance of clarifying, and should not be construed as the scope with the limit claim.
Claims (15)
1. sound reproduction system, said sound reproduction system comprises:
Loudspeaker unit (101), said loudspeaker unit (101) comprising:
Cone (207),
First transducer (211,213) is used for first electrical signal conversion is become the motion of said cone (207), and
Second transducer (215,217) is used for second electrical signal conversion is become the motion of said cone (207); And
Drive circuit (103), part drives said first transducer (211,213) and said second transducer (215,217) independently to be used for coming at least through said first signal of telecommunication that generation is different from said second signal of telecommunication.
2. according to the described sound reproduction system of claim 1, wherein, said drive circuit (103) is arranged to said first signal of telecommunication of generation and comes corresponding to first sound source, and it is next corresponding to second sound source to generate said second signal of telecommunication.
3. according to the described sound reproduction system of claim 1; Wherein, Said drive circuit (103) is arranged to and generates said first signal of telecommunication and come first sound channel signal corresponding to first audio track at interval of first frequency at least, and generates said second signal of telecommunication and come second sound channel signal corresponding to second audio track of said first frequency at interval.
4. according to the described sound reproduction system of claim 3, wherein, said first audio track and said second audio track are the space sound channels.
5. according to the described sound reproduction system of claim 4, wherein, said drive circuit (103) also is arranged to and receives the low-frequency effects sound channel signal, and in response to said low-frequency effects sound channel signal generate said first signal of telecommunication and said second signal of telecommunication the two.
6. according to the described sound reproduction system of claim 3; Wherein, Said drive circuit (103) also is arranged to through said first sound channel signal and second sound channel signal of combination second frequency at interval and generates composite signal, and the two comes corresponding to the said composite signal of said second frequency at interval to generate said first signal of telecommunication and said second signal of telecommunication.
7. according to the described sound reproduction system of claim 6, wherein, said second frequency comprises the frequency lower at interval than said first frequency at interval.
8. according to the described sound reproduction system of claim 1; Wherein, The first of said cone is attached to said first transducer (211; 213) first displaceable element (213), and the second portion of said cone is attached to second displaceable element (217) of said second transducer (215,217).
9. according to the described sound reproduction system of claim 8; Wherein, Said first provides first cone area (219) that has by the completely specified motion of motion of said first displaceable element (213); Said second portion provides second cone area (221) that has by the completely specified motion of motion of said second displaceable element (217), and said cone (207) also comprises the 3rd cone area (223) with motion of being confirmed by said first displaceable element (213) and both motions of said second displaceable element (215).
10. according to the described sound reproduction system of claim 9, wherein, the sound channel separation between said first cone area (219) and said second cone area (221) is 10dB at least.
11. said sound reproduction system according to claim 9; Wherein, Said first displaceable element (213) and said second displaceable element (215) are voice coil loudspeaker voice coils, and said first cone area (219) and said second cone area (221) are the zones that is in the said cone (207) in the said voice coil loudspeaker voice coil circumference.
12. according to the described sound reproduction system of claim 9; Wherein, Said third part (223) has than is lower than the high efficient of said first cone area (219) of crossover frequency for said first signal of telecommunication, and has than is higher than the low efficient of said first cone area (219) of said crossover frequency for said first signal of telecommunication.
13. according to the described sound reproduction system of claim 1, wherein, the cone circumference of said cone has the size less than 20 centimetres of 5 cm x.
14. according to the described sound reproduction system of claim 1, wherein, the maximum cross section distance between the point of the cone circumference of said cone (207) is not more than 20 centimetres.
15. method that drives loudspeaker unit (101); Said loudspeaker unit (101) comprises cone (207), first transducer (211,213); Be used for first electrical signal conversion is become the motion of said cone (207); And second transducer (215,217), be used for second electrical signal conversion is become the motion of said cone (207); Said method comprises:
Said first signal of telecommunication that is different from said second signal of telecommunication through generation at least partly drives said first electromagnetic transducer (211,213) and said second electromagnetic transducer (215,217) independently.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09166298 | 2009-07-24 | ||
| EP09166298.1 | 2009-07-24 | ||
| PCT/IB2010/053243 WO2011010254A1 (en) | 2009-07-24 | 2010-07-16 | A sound reproduction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102484755A true CN102484755A (en) | 2012-05-30 |
Family
ID=42983817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080033491XA Pending CN102484755A (en) | 2009-07-24 | 2010-07-16 | A Sound Reproduction System |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2457382B1 (en) |
| JP (1) | JP2013500615A (en) |
| CN (1) | CN102484755A (en) |
| RU (1) | RU2012106653A (en) |
| WO (1) | WO2011010254A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106797514A (en) * | 2014-11-24 | 2017-05-31 | 苹果公司 | Mechanically actuated panel-acoustic system |
| CN107750033A (en) * | 2010-10-21 | 2018-03-02 | 3D声学控股有限公司 | Acoustic diffusion generator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0341926A1 (en) * | 1988-05-09 | 1989-11-15 | Kh Technology Corporation | Loudspeaker |
| US5295194A (en) * | 1989-06-05 | 1994-03-15 | Christensen Eugene J | Multi-driver loudspeaker assembly |
| CN1121678A (en) * | 1994-06-06 | 1996-05-01 | 株式会社建伍 | Loudspeaker |
| JP2770436B2 (en) * | 1989-07-05 | 1998-07-02 | 松下電器産業株式会社 | Speaker |
| EP0858243A2 (en) * | 1997-02-07 | 1998-08-12 | Bose Corporation | Surround sound channel encoding and decoding |
| JP2004343481A (en) * | 2003-05-16 | 2004-12-02 | Alps Electric Co Ltd | Panel speaker |
| JP3909995B2 (en) * | 2000-03-01 | 2007-04-25 | ローム株式会社 | Heavy bass correction system and acoustic apparatus using the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2539672A (en) * | 1949-04-29 | 1951-01-30 | Rca Corp | Coaxial dual-unit electrodynamic loud-speaker |
-
2010
- 2010-07-16 WO PCT/IB2010/053243 patent/WO2011010254A1/en active Application Filing
- 2010-07-16 RU RU2012106653/28A patent/RU2012106653A/en not_active Application Discontinuation
- 2010-07-16 EP EP10742279.2A patent/EP2457382B1/en not_active Not-in-force
- 2010-07-16 CN CN201080033491XA patent/CN102484755A/en active Pending
- 2010-07-16 JP JP2012521132A patent/JP2013500615A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0341926A1 (en) * | 1988-05-09 | 1989-11-15 | Kh Technology Corporation | Loudspeaker |
| US5295194A (en) * | 1989-06-05 | 1994-03-15 | Christensen Eugene J | Multi-driver loudspeaker assembly |
| JP2770436B2 (en) * | 1989-07-05 | 1998-07-02 | 松下電器産業株式会社 | Speaker |
| CN1121678A (en) * | 1994-06-06 | 1996-05-01 | 株式会社建伍 | Loudspeaker |
| CN1041487C (en) * | 1994-06-06 | 1998-12-30 | 株式会社建伍 | Loudspeaker |
| EP0858243A2 (en) * | 1997-02-07 | 1998-08-12 | Bose Corporation | Surround sound channel encoding and decoding |
| JP3909995B2 (en) * | 2000-03-01 | 2007-04-25 | ローム株式会社 | Heavy bass correction system and acoustic apparatus using the same |
| JP2004343481A (en) * | 2003-05-16 | 2004-12-02 | Alps Electric Co Ltd | Panel speaker |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107750033A (en) * | 2010-10-21 | 2018-03-02 | 3D声学控股有限公司 | Acoustic diffusion generator |
| CN106797514A (en) * | 2014-11-24 | 2017-05-31 | 苹果公司 | Mechanically actuated panel-acoustic system |
| US10362403B2 (en) | 2014-11-24 | 2019-07-23 | Apple Inc. | Mechanically actuated panel acoustic system |
| CN106797514B (en) * | 2014-11-24 | 2019-08-20 | 苹果公司 | Electronic audio device, electronics audio device and the method for generating audible sound |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2457382B1 (en) | 2013-09-11 |
| RU2012106653A (en) | 2013-08-27 |
| EP2457382A1 (en) | 2012-05-30 |
| WO2011010254A1 (en) | 2011-01-27 |
| JP2013500615A (en) | 2013-01-07 |
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