CN103079155B - Double-basin-frame combined type loudspeaker system with precise ring-shaped pipe composite channel group - Google Patents
Double-basin-frame combined type loudspeaker system with precise ring-shaped pipe composite channel group Download PDFInfo
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Abstract
The invention discloses a double-basin-frame combined type loudspeaker system with a precise ring-shaped pipe composite channel group. The combined type loudspeaker system is characterized in that a double-basin-frame cone loudspeaker is structured, the precise ring-shaped pipe composite channel or channel group is upwards arranged behind or before the double-basin-frame medium-low cone loudspeaker, the acoustic radiation environment, the process influencing the acoustic transferring radiation and the outputted acoustic field are limited, the fidelity and the radiation efficiency of the forward and backward radiating acoustic waves are improved; when the loudspeaker works at low frequency, the precise ring-shaped pipe composite channel consists of a ring-shaped pipeline acoustic transformator and a ring-shaped pipe acoustic mass element; the total equivalent vibration mass of the loudspeaker is increased due to combined action of the acoustic transformator and the acoustic mass, so that the low-frequency resonant frequency of the loudspeaker is reduced and further the low-frequency radiating efficiency is improved; and a vibrator of the double-basin-frame loudspeaker enclosed by the precise ring-shaped pipe composite channel or the channel group is also not directly interfered by external air, the surface load balance or forward and backward load balance can be maintained and the dynamic reaction speed can be increased.
Description
technical field:
The present invention is two frame precise annular tube composite channel group combination speaker systems, belongs to electroacoustic techniques field.
background technology:
In daily life, people often use loud speaker to sound of resetting.After in conventional electrodynamic type, bass cone loudspeaker (comprising bass, middle bass, Squawker and full range speaker, hereinafter also referred to as loud speaker) completes, the resonance frequency omega of the resonator system of its low frequency power
0just determine, ω
0determine the lower limit of this speaker playback sound frequency, and usually to be arranged on loud speaker that infinitely great baffle works for reference, loudspeaker frequency ω is described
0etc. index.In this case, be placed in the loud speaker on infinitely great baffle, directly free radiation carried out to the air in former and later two directions and transmit sound, its ω
0=, M
mrepresent the total equivalent mass of electrodynamic loudspeaker, comprise cone basin equivalent mass M
1, voice coil loudspeaker voice coil equivalent mass M
2, vibrating body front is with to shake mass M
mR1, the back side is with to shake mass M
mR2, i.e. M
m=M
1+ M
2+ M
mR1+ M
mR2; C
mrepresent the total equivalent force of electrodynamic loudspeaker, comprise yoke ring mechanical compliance C
m1, central washer mechanical compliance C
m2, i.e. C
m=.
Usually can only not utilize baffle to reset sound with such loud speaker, at that rate, the sound wave that the phase place that former and later two directions of loudspeaker vibrating body give off is contrary, can aloft mix mutually and offset, loss loud speaker acoustic capabilities.During use, loud speaker can not be arranged on infinitely great baffle and use, and it is always together with audio amplifier, utilizes that the baffle of sound box is split, the sagittal acoustic irradiation of limiting loudspeaker vibrating body.These are just different from the reference environment for use of loud speaker, will affect the performance of loud speaker.
But when loud speaker be contained in audio amplifier forms sound box system use time, the loud speaker acoustic energy entrained by radiated wave is behind subject to the encirclement of casing, could not exhale in casing, can not be used directly, and these sound waves also can affect by loudspeaker box internal environment and are applied on the vibrating body of loud speaker by roundtrip, and the acoustic pressure of reflected wave, the vibration of loudspeaker vibrating body can be disturbed, further ability and the effect affecting loudspeaker radiates sound, and, it is nearer for these object distance of loud speaker surrounding environment, affects also larger.This surrounding enviroment, on the impact of loudspeaker radiates, are embodied in and change the total equivalent M of loud speaker
m, C
mnumerical value, also have impact on the low-frequency resonant frequency of loud speaker, therefore, the low-frequency range of speaker playback sound in sound box system is determined by loud speaker and sound box two aspect factor.For above formula, if the impact of sound box can make the total equivalent force C of loud speaker now
mor total equivalent mass M
mstrengthen, can ω be made
0decline, loud speaker can be reset out more bass.
But actual conditions are contrary.Usually when loud speaker is external according to forward, the audio amplifier dorsad traditional approach of radiation sound in casing being arranged on to common structure uses, effectively can not increase its total equivalent mass M
m, on the contrary, but always make its vibrating body back side with quality and the total equivalent force C of shaking
mreduce.As shown from the above formula, this is by the low-limit frequency of the sound that makes sound box system reset out, than the resonance frequency omega of single loud speaker
0improve, cause loud speaker to lose the ability of some playback low-frequency sounds.
The total equivalent force C of loud speaker in above-mentioned situation
mthe reason reduced, because the air in audio amplifier forms an acoustic compliance element, when loudspeaker vibrating body works in low frequency, it is just as a resilient spring, give loudspeaker vibrating body resiliency supported from behind, limit the resonance of its vibrating body from loud speaker outside, make speakers low frequencies harmonic motion become difficulty, can not promote the original sound many like that of air radiation, therefore its low-frequency resonant frequency raises.Usually, sound box volume is less, and the elasticity that casing air produces is larger, and compliance less (its coefficient of elasticity equals the inverse of compliance coefficient), vice versa.The elastic reaction of this acoustic compliance element of casing air, show in superincumbent calculating formula, this acoustic compliance element when being exactly low frequency, equivalent parallel is on the existing mechanical compliance element of loud speaker itself, make loudspeaker vibrating body add " bullet " property, decrease the equivalent force C that vibrating body is total
m" suitable " property, cause its ω
0raise.This situation in common sound box system, as in the audio amplifiers such as airtight audio amplifier, reflex cabinet, all so.That is, loud speaker traditionally and occupation mode thereof are combined formed sound box system with traditional loudspeaker box structure, in use cannot reduce the low-frequency resonant frequency of finished speaker.
Therefore, allowing the most popular method of sound box system playback high-fidelity, more lower frequency sounds traditionally, is adopt bigbore woofer.Heavy caliber woofer cones area is larger, and can promote more air vibration radiation, its vibrating body is also heavier, and this allows the total equivalent mass M of loud speaker
mtherefore strengthen, make ω
0decline.This dependence increases the way that loudspeaker vibration weight reduces loudspeaker frequency, mean and promote this loud speaker with more how valuable cones material and larger power amplifier, loud speaker also must have more big and heavy voice coil loudspeaker voice coil to bear the power of amplifier, loud speaker also needs larger magnet to make it vibrate to produce larger motive force, therefore the production of this method and use cost very high, and produce, debug also more complicated.During with heavy caliber woofer playback middle pitch, also dynamic response can be made slow because its vibrating body is heavier, affect middle pitch hi-fi reproduction, now, for taking into account the playback of bass and middle pitch, often use a heavy caliber woofer and a Squawker, respectively playback bass and middle pitch, but this causes higher cost and workload simultaneously.
And, usually when common medium and low spectrum loudspeaker be arranged on sound box uses time, in order to avoid casing standing internal wave is on the impact of loud speaker, loud speaker is not arranged on the middle of casing baffle usually, and in this kind of situation lower box, the reflected wave of various frequency is applied to the interference that vibrating body goes up dorsad is unbalanced, and this also have impact on the load balancing of vibrating body, its flexible vibratory can be affected, reduce reaction speed, reflected wave, to the interference of vibrating body, also causes vibration distortion.
Patent of invention " a kind of speaker system " (patent No.: ZL02110023.3) provides speaker operation when low frequency, utilizes the acoustic mass in the transaudient sleeve pipe of the special radiation of loud speaker, increases the total equivalent mass M of loud speaker
m, effectively reduce the technology of the low frequency power resonance frequency of medium and low frequency loud speaker.
" a kind of speaker system " is arranged on the special radiation channel that loud speaker goes up dorsad by a medium and low spectrum loudspeaker and is combined with one the speaker system formed, the core work of " a kind of speaker system " is the transaudient sleeve channel of installation dorsad at loudspeaker vibrating body, for radiation, transmit loud speaker sound dorsad, this passage is unique passage of loud speaker outside radiation sound dorsad, loud speaker vibration radiation dorsad, spreads out of by the air load between sleeve pipe outside passage.
Air in one section of annular space in " a kind of speaker system " between loud speaker and internal and external casing, forms an acoustic compliance element C
a, when speaker operation is in low frequency, the air in the ring pipe space that sectional area is identical between inside and outside two sleeve pipes, forms acoustic mass element.Namely now from structure, " a kind of speaker system ", mainly loud speaker and an acoustic compliance element of a low frequency operation and acoustic mass element are connected a complex sound structure of formation mutually.When speaker operation is in low frequency, the acoustic mass of acoustic mass element in transaudient sleeve pipe, will become a part for loudspeaker vibration quality, and makes the total equivalent oscillating mass M of speaker system
mincrease.According to above-mentioned speakers low frequencies resonance frequency omega
0formula is known, and this can reduce speakers low frequencies power resonance frequency, and loudspeaker radiates is gone out than original lower low-frequency sound.
When " a kind of speaker system " is installed to loudspeaker box uses time, surround on a large scale because loudspeaker vibrating body is subject to transaudient sleeve pipe dorsad, this reflective sound wave avoiding various frequency in casing largely comprises standing wave and directly acts on vibrating body, this can improve the antijamming capability of loud speaker, and keep the uniform balance of loud speaker acoustic load dorsad, be conducive to the reaction speed improving vibrating body.
" a kind of speaker system " improves the total equivalent oscillating mass M of loud speaker by the acoustic mass existed in sleeve channel transaudient during low frequency operation
m, reduce the method for common finished product medium and low spectrum loudspeaker low-frequency resonant frequency, there is essential meaning pole, and compared to common woofer, this way had both saved a large amount of precious materials, does not affect again the operating rate that loud speaker intermediate frequency one is with.Therefore, no matter " a kind of speaker system " is realizing on bass technical method, or in the structure of speaker system, all not identical with common medium and low spectrum loudspeaker, it has developed medium and low spectrum loudspeaker technology.
But by studying discovery further, " a kind of speaker system " structurally also also exists some problems, and this have impact on the performance of this systematic function and ability, is necessary its Improvement and perfection, so that the performance of further raising system and function.
" a kind of speaker system " structure, principle and performance mainly deposits following Railway Project:
One, the channel space before loudspeaker vibrating body to transaudient cannula inlet port, forms an acoustic compliance element C
a, C
acontain in this section of space before speaker frame root junction to magnet thereafter and there is uneven path.This section of exposed loud speaker uneven surface, the sound wave that can go out vibration radiation produces stop and causes reflection, causes the distortion in sound wave transmittance process and acoustical energy losses.
The inner surface of the frame supporting surface of loud speaker dorsad around acoustic irradiation mouth, the path of the sound wave stop, reflected vibrating body radiation homogeneous radiation backward, stop the acoustic waveform distorting transformation making to be given off by radiation port in frame, cause radiated sound loss of energy, reflection causes diffuser to vibrate distortion.
When sound wave is by transaudient passage, because whole transaudient sleeve channel is narrow, the acoustic pressure of cone vibrating body institute radiative acoustic wave is little along channel attenuation, higher acoustic pressure is had in radio cone paper circumference pelvic and transaudient sleeve channel, the distortion acoustic pressure of above-mentioned reflection and radiation, closely at once can produce the reflection of higher-strength, the vibration of interference vibrating body, causes the vibration distortion of vibrating body.
That is, there is the vibration distortion of vibrating body, the radiative acoustic wave distortion of radiation port and passage in whole transaudient sleeve channel and transmit sound wave distortion totally three kinds of distortions.
Two, C
athe porch of element additional space, the path area that air flows through there occurs change, that is, in this speaker system, before loud speaker to space, acoustic mass element place in transaudient sleeve pipe in end spaces, imply an acoustic transformer.But owing to there is the connection gap between speaker frame and upper conduction magnetic board and magnet in passage, and upper conduction magnetic board and magnet upper end surface are with the reflecting surface towards vibrating body, unsmooth in the passage that this these exposed part by means of loud speaker is formed, sound wave is in reflect and to cause distortion and acoustical energy losses herein, due to these distortions and the uncertainty with acoustical energy losses, have impact on C
athe accuracy of the implicit due transform effect of acoustic transformer.
Three, acoustic compliance element C
a, Problems existing, causes distortion, affects radiation efficiency, and itself does not also help the resonance frequency reducing loud speaker, also makes equivalent electric circuit complicated, is unfavorable for simplification and the intuitive analysis of problem.
Four, the mode of the equal acoustic mass element of a kind of sectional area be made up of two straight pipes is simply given in " a kind of speaker system ", and transaudient passage in fact between two round types connected together and the transaudient passage that forms between two plectanes are unequal along the sectional area of channel direction, in order to the requirement making it meet transaudient sleeve pipe acoustic mass, need to re-construct acoustic mass element between them.Therefore, the construction method of the acoustic mass element in the transaudient passage formed between round type and between two plectanes will be improved comprehensively.
Visible, in order to improve the performance in " a kind of speaker system " further, must solve the problem.That is, in order to reduce the reflection and radiation distortion that to stop around speaker frame radiation port and cause, and the energy loss brought thus, loud speaker shelf structure be improved; In order to reduce the transmission distortion of vibration distortion that passage internal reflection causes and passage, need transformation acoustic radiating passage.Above-mentioned distortion and acoustical energy losses, have impact on quality and the ability of playback sound.The problems referred to above one, two, three all with the acoustic compliance element C in transaudient sleeve pipe
athe space at place is relevant, and C
ain implicit acoustic transformer element, also channel space structure transaudient with radiation is relevant, therefore, also must redesign the acoustic compliance element C in " a kind of speaker system " transaudient sleeve channel
aspace, and strictly construct this implicit acoustic transformer element, need the construction method improving acoustic mass element in passage simultaneously.
Summary of the invention
technical problem to be solved by this invention is: provide a kind of two frame precise annular tube composite channel group combination speaker system, solve the supporting surface of loud speaker dorsad between frame radiation port, reflection cone vibrating body backward radiation sound wave and disturb cone to vibrate, and the path of supporting surface between the frame radiation port sound wave homogeneous radiation backward that stops the radiation of cone vibrating body, cause radiative acoustic wave distortion, in impact, the problem of low frequency radiation-efficiency; Also to solve in passage in sound wave transmittance process at C
athe transmission distortion that reflecting surface in the space at place causes and the cone that acoustic reflection causes vibrate distortion and C
ain acoustical energy losses, and by solve C
amiddle distortion and acoustical energy losses and uncertainty thereof, improve C
athe accuracy of the transform effect of interior implicit acoustic transformer; Also solve when internal and external casing is not straight tube, the formation problem of the acoustic mass element in the ring pipe passage formed between internal and external casing; When a precise annular tube composite channel internal memory acoustic mass element in two frame precise annular tube composite channel group combination speaker system, utilize this acoustic mass element, the equivalent oscillating mass of loud speaker can be increased, reduce the low-frequency resonant frequencies omega of loud speaker
0.Especially before and after two frame to precise annular tube composite channel group combination speaker system, its low-frequency resonant frequency capabilities reducing loud speaker is more obvious, method is more flexible, and the load at loud speaker two ends also more easily balances under this mode, be conducive to improving dynamic respons speed, vibration distortion is also less; Be arranged on front and back precise annular tube composite channel group upwards, the middle pitch of loud speaker can be improved; Be arranged on the precise annular tube composite channel of external radiation sound before loud speaker, the sound field of speaker playback sound can also be expanded, improve directive property and the ante-chamber effect of speaker system radiation sound.By increasing damping material in ring pipe passage, the damping of speaker system can also be regulated.To overcome the defect of prior art.
The technical solution adopted for the present invention to solve the technical problems is as follows:
Two frame precise annular tube composite channel group combination speaker system, comprise cone loudspeaker, it is characterized in that: described cone loudspeaker comprises front frame and rear frame, also comprise front end to be arranged on rear end in front frame and to be arranged on vibrating body cone in rear frame, the rear end of described rear frame is provided with circular magnet, and front frame, rear frame, magnet are coaxial with cone; There is between the rear end of front frame and the front end of rear frame the space keeping the normal vibration of vibrating body cone, and form ring radiation opening;
Also comprise the second inner sleeve on excircle that front end is arranged on circular magnet and coaxial with circular magnet, also comprise the outer tube coaxial with the second inner sleeve, the front end of outer tube is fixedly mounted in front frame;
Also be included between outer tube and the second inner sleeve and arrange at least one backward intermediate casing, backward intermediate casing is coaxial with circular magnet; The front end of backward intermediate casing as far as possible near with vibration cone after to the peak swing place of correspondence position; Backward intermediate casing and outer tube and the second inner sleeve are connected to each other; Backward intermediate casing, formed between outer tube and the second inner sleeve at least after twice to circular passage unit.
Also comprise the first round table-like inner sleeve of one section of axle centered by the axes O of vibrating body cone, the front end of the first inner sleeve is airtight to be connected in rear frame, first inner sleeve rear end aligns with the second inner sleeve front end and is connected, for smoothly transitting between the first inner sleeve and the second inner sleeve.
In the rear circular passage unit between intermediate casing that the outer wall of the second inner sleeve is adjacent with the second inner sleeve, several are installed and are connected block piece, or in the rear circular passage unit between intermediate casing that the inwall of outer tube is adjacent with outer tube, several are installed and are connected block piece, or be all provided with several in each backward circular passage unit and connect block piece, connection block piece is solid or is obturator; Adjacent two connect for move towards consistent transaudient passage with backward circular passage between block piece, and in the unit of same backward circular passage, each transaudient passage has consistent cross-sectional area along its transaudient direction.
The sidewall front end of described front frame with flanging, also comprise rear end to be arranged on described flanging and coaxial with vibrating body cone before outer tube, described front outer tube inside be provided with coaxial with front outer tube before inner sleeve; Described front inner sleeve and front outer tube are connected to each other; Forward direction ring pipe passage is formed between the outer wall of front inner sleeve and the inwall of front outer tube.
The present invention can also comprise at least one forward direction intermediate casing between described front outer tube and front inner sleeve, and forward direction intermediate casing is coaxial with vibration cone; The rear end of forward direction intermediate casing is as far as possible near the peak swing place with vibrating body cone forward direction correspondence position; Forward direction intermediate casing and front inner sleeve and front outer tube are connected to each other; Forward direction intermediate casing, between front inner sleeve and front outer tube, form at least bipassage ring shape channel unit.
In forward direction ring pipe passage, several block pieces are installed; Block piece is solid or is obturator, and be the transaudient passage that trend is consistent with forward direction ring pipe passage between adjacent two block pieces, each transaudient passage has consistent cross-sectional area along its transaudient direction.
The present invention can also be provided with several block pieces in the circular passage unit between the outer wall of front inner sleeve and the forward direction intermediate casing adjacent with front inner sleeve, or in the circular passage unit between the inwall and the forward direction intermediate casing adjacent with front outer tube of front outer tube, several block pieces are installed, or in each circular passage unit, several block pieces are all installed; Block piece is solid or is obturator, and be the transaudient passage that trend is consistent with forward direction ring pipe channel unit between adjacent two block pieces, in the unit of same circular passage, each transaudient passage has consistent cross-sectional area along its transaudient direction.
Also comprise the retaining piece of one section of axle centered by the axes O of vibrating body cone; The front end of retaining piece aligns with front inner sleeve rear end and is connected, and the outer wall of retaining piece is even surface; For smoothly transitting between retaining piece and front inner sleeve; The rear end of described retaining piece is positioned at the front at vibrating body cone peak swing place and tries one's best near this peak swing place.
good effect of the present invention is:
Two frame precise annular tube composite channel group combination speaker system, be combined to form on the basis of two frame speaker system with precision circular-tube compound channel, two frame speaker system with precision circular-tube compound channel is that two frame loud speaker precise annular tube composite channel backward with being arranged on it is combined and is formed.Two frame loud speaker, there is the front and back frame that two are not directly connected, fix the front and rear part of diffuser respectively, the sound wave of diffuser vibrating body backward radiation, is given off by the ring radiation opening between the frame of front and back, this mode, without the frame area between common frame radiation port, considerably reduce the stop of speaker frame to the sound wave of cone vibrating body backward radiation, improve the fidelity of loudspeaker radiates sound wave, be conducive to the radiation efficiency improving loud speaker medium and low frequency.In essence, precise annular tube composite channel is the ring pipe acoustic transformer element formed by an annular space, form with the ring pipe acoustic transformer combination of elements that a ring pipe passage is formed, precise annular tube composite channel can be arranged on the forward direction of two frame loud speaker, as the two frame precise annular tube composite channel of forward direction, or be arranged on loud speaker backward on, form backward pair of frame precise annular tube composite channel, the front and back that also can be arranged on two frame loud speaker upwards, use to two frame precise annular tube composite channel before and after forming.
One group of precise annular tube composite channel connects together, just form precise annular tube composite channel group, namely precise annular tube composite channel group is the one group of ring pipe acoustic transformer element formed by one group of annular space unit, form with one group of ring pipe acoustic transformer combination of elements that one group of ring pipe channel unit is formed, wherein, the annular space formed between internal and external casing in precise annular tube composite channel has been split in each annular space unitary space, the ring pipe acoustic transformer element that each annular space unit is formed and the ring pipe acoustic transformer combination of elements that same unit annular tube passage is formed form precise annular tube composite channel.Precise annular tube composite channel group can be arranged on the forward direction of two frame loud speaker, as the two frame precise annular tube composite channel group of forward direction, or be arranged on loud speaker backward on, form backward pair of frame precise annular tube composite channel group, the front and back that also can be arranged on two frame loud speaker upwards, use to two frame precise annular tube composite channel group before and after forming.In the present invention, precise annular tube composite channel group can be arranged on the front and back end of two frame loud speaker, uses before and after forming to two frame precise annular tube composite channel group.Multiple combination before and after two frame loud speaker between different precise annular tube composite channel upwards or precise annular tube composite channel group, forms two frame precise annular tube composite channel group combination speaker system.
Precise annular tube composite channel group is more flexible than precise annular tube composite channel, there are several passages of multi-functional transmission sound, in usual precise annular tube composite channel group, each passage be made up of acoustic transformer element and acoustic transformer element, but, when the no-load voltage ratio of the acoustic transformer of some passage is 1, namely, when the import and export constant area of these passages is constant, the passage that these passages are just just made up of acoustic transformer element, if now these passages are consistent with vibrating body radiated sound wave line of propagation, what then pass through in these passages is some sound waves consistent with vibrating body radiative acoustic wave waveform, being similar to what pass through in sound pipe is plane wave, this correspondingly improves the radiation efficiency of loud speaker.
Due to the operation principle of each channel unit in precise annular tube composite channel group, identical with the situation of precise annular tube composite channel, and with regard to reduction speakers low frequencies resonance frequency, in two frame precise annular tube composite channel combination speaker system, the operation principle of the radiant transfer of sound wave in forward direction precise annular tube composite channel, with sound wave rear identical to the operation principle of radiant transfer in precise annular tube composite channel, therefore, sometimes for backward precise annular tube composite channel, operation principle is described.
1, the frame structure that loud speaker affects acoustic radiation is transformed, reduce frame internal surface area and distortion is vibrated to cone vibration radiation sound wave reflection and the cone that causes thus, and reduce the radiation distortion that sound wave produced because of distortion by radiation port place, improve fidelity and the radiation efficiency of loud speaker and radiation sound.
Loud speaker in speaker system with precision circular-tube compound channel can be a medium and low spectrum loudspeaker improving loud speaker shelf structure, also can be a common medium and low spectrum loudspeaker.Usually, accurate transmission sound passage, critically can transmit sound wave.But when common medium and low spectrum loudspeaker forms speaker system with precision circular-tube compound channel, the sound wave of diffuser vibrating body radiation will enter transaudient passage by the radiation port on speaker frame lateral support face, and the remainder on frame supporting surface outside radiation port, blocking reflected can be produced to radiated wave, and because its position is very near apart from vibrating body, reflected wave can disturb vibrating body normal vibration immediately, cause vibration distortion, and the sound wave of cone homogeneous radiation is towards periphery because of the stop of frame, through radiation port out after acoustic waveform gross distortion.Therefore, when the performance of " a kind of speaker system " radiant transfer sound further need be improved, necessary improvement to be done to speaker frame, this also help improve speaker operation in, low frequency time sound radiation efficiency.
Its major programme has following three kinds:
(1), cancel connection supporting surface part between speaker frame radiation port, ventional loudspeakers radiation port being communicated with is a circle ring radiation opening.
(2) multiple large bar shaped radiation port and thin supporting surface or narrow thick brace rod frame structure, is adopted.
(3) the frame structure of large mesh radiation port and fine-structure mesh limit supporting surface or narrow thick brace rod, is adopted.
Scheme (1) is one improved procedure the most thoroughly, and now the frame of loud speaker is broken is split into as upper and lower two frame, will set up the connection between two parts of being disconnected in addition, with fixing diffuser.
Two frame ring radiation opening loud speaker is combined with precise annular tube composite channel, to speaker system with precision circular-tube compound channel after the two frame of formation, two frame structure considerably reduces stop to radiative acoustic wave and reflection, reduce frame reflection and stop the distortion and acoustical energy losses that produce, be also conducive to speaker system produce more greatly, more in fidelity, low-frequency sound.Ring radiation opening loud speaker not only expands the discharge area of radiation channel, make the acoustic waveform more fidelity given off, this takes a firm foundation for improving radiation efficiency, the face if the ripple that the sound wave importing precise annular tube composite channel into by radiation space is consistent shakes, then can improve the radiation efficiency of speaker system intermediate frequency.This way also makes vibration cone surface loading even, is conducive to reducing vibration distortion, and during low frequency, vibration more has dynamics, more resembles an accurate stiff piston, has better bass performance.
To precise annular tube composite channel combination speaker system before and after the two frame formed with this loud speaker, the load at loud speaker two ends also more easily balances, and is conducive to improving dynamic respons speed, and vibration distortion is also less, and sound is fidelity more.
2, construct a precise annular tube acoustic transformer element, improve passage environment, considerably reduce this section of passage and sound wave is stopped, reflects and the distortion that causes and acoustical energy losses, also make system class be simplified than circuit thus.
Have two place's acoustical energy losses in " a kind of speaker system " passage, one in channel space, is hindered acoustic reflection is produced by object; One on the tube wall of passage, is produced by the pipe friction of air and passage.The acoustic compliance element C that the space limited by outer tube in passage after speaker frame to speaker magnet is formed
a, they be the element of a two-port, and the area of its input port, delivery outlet is different usually, from this meaning, and C
aspace is identical with an acoustic transformer component space, i.e. C
ainside imply an acoustic transformer.
But at C
ain the space at place, exposed magnet and speaker frame root junction some uneven surfaces like this, when sound wave is by this region, locally can produce reflection, sound energy consumption at these, and due to C
anarrow space, reflection can form comparatively strong jamming to vibrating body, affects loudspeaker vibration, causes distortion and the acoustical energy losses of the vibration of vibrating body cone and radiant transfer process, in this one side, C
adifferent again from acoustic transformer.And due to C
areduce frequency without any positive effect to " a kind of speaker system ", in equivalent electric circuit, it also makes complex circuit, is not easy to analyze.Acoustic compliance element C in transaudient sleeve channel
auneven surface in space to transmitting the blocking reflected of sound wave, directly affects the efficiency of medium and low frequency radiation and the fidelity of sound, the amplitude-frequency characteristic of intermediate frequency becomes uneven.
Therefore, in two frame precise annular tube composite channel group combination speaker system, by increasing by the first inner sleeve, between the first inner sleeve and outer tube, construct a smooth annular space and form ring pipe acoustic transformer, instead of " a kind of speaker system " acoustic compliance element C
acompared to the transaudient sleeve channel in " a kind of speaker system ", due to the inner brilliance of precise annular tube composite channel, the distortion not having reflecting surface to cause and energy loss, greatly can improve the amplitude-frequency characteristic of the medium and low frequency that speaker system exports, make amplitude-frequency characteristic more level and smooth.The ring radiation opening of two frame loud speaker is from more this ensure that in precise annular tube passage, air is incompressible, and volume velocity does not change, and therefore can ignore the acoustic compliance value of annular space under certain condition.Acoustic compliance element C in " a kind of speaker system " is completely eliminated like this in analogy line map
aimpact, analogy circuit becomes more succinct, clear and definite.Precise annular tube composite channel internal structure is regular, and major parameter is wherein programmable very accurate, is conducive to industrial standardization and produces.
Common acoustic transformer imports and exports in the different hollow tube of area at one to be formed, the acoustic transformer in speaker system with precision circular-tube compound channel of the present invention be by two by all means between annular space form, be different from general constructive method.
3, a kind of formation method of the acoustic mass element of other several primary structures in transaudient sleeve channel in perfect " speaker system ", speaker system with precision circular-tube compound channel structural change is many, and usage is more flexible.
In " a kind of speaker system ", when form the sound pipe shape of transaudient passage be expand outwardly round table-like time, the annulus area along channel direction will change, and the acoustic mass element now between internal and external casing will not exist.In order to make now still there is acoustic mass element in ring pipe passage, must in channel interior along channel direction, re-construct out sectional area just as space, as acoustic mass element.
Still for the backward precise annular tube composite channel in backward speaker system with precision circular-tube compound channel set.The basic comprising mode of the ring pipe acoustic mass element now in two frame precise annular tube composite channel group combination speaker system is by forming even, the identical straight circular air duct of one section of sectional area between the second inner sleeve and outer tube.In order to other needs, may also be the ring pipe passage of truncated conical shape, but in this structure space, sectional area is different everywhere, directly can not forms an acoustic mass element.Therefore, in speaker system with precision circular-tube compound channel, also expand further, perfect when passage be a round table-like ring pipe passage, and even the table top of this round table-like ring pipe passage is expanded further and is made the inside and outside tube wall of passage be expanded to plan position approach, become inside and outside two plane plectanes, namely when round table-like ring pipe passage becomes the passage between two plane plectanes, the generation type of interchannel acoustic mass element.These above-mentioned changes ensure that precise annular tube composite channel shape and apply more versatile and flexible.
For this reason, the two frame precise annular tube composite channel group combination speaker system of the present invention, by connecting block piece in rear consistent with ring pipe passage some groups of the trend that increases in sound passage, often group connection block piece is solid or is obturator, connect between block piece in two adjacent groups and form new transaudient passage, and make each transaudient passage have consistent cross-sectional area along its trend, even if round table-like sound pipe has and different expands outwardly angle, in the annular space formed between two pipes, can be simple, construct acoustic mass element neatly, to meet, low-frequency requirement is fallen.Shape due to precise annular tube composite channel group depends on the shape of each precise annular tube composite channel, and therefore each channel unit acoustic mass element in precise annular tube composite channel group, is just determined by the structure of the acoustic mass of each precise annular tube composite channel.
Equally, when round table-like ring pipe passage becomes the passage between two plane plectanes, between two plectanes, also acoustic mass element can be re-constructed in this way.
After taking these measures, expand, other several main composition modes of acoustic mass element in perfect passage, fundamentally ensure that in passage, sound mass elements exists all the time, this guarantees the effect of the reduction power resonance frequency of precise annular tube composite channel structure of loudspeaker system, and make channel shape select more flexibly, freely, make its structure have adaptability widely.
Especially two frame precise annular tube composite channel group combination speaker system, the ring pipe passage on former and later two directions or the acoustic mass in passage group can be utilized simultaneously, farthest improve acoustic mass element equivalent effect same quality of shaking on a speaker, reduce the low-frequency resonant frequency of loud speaker further.
4, there are two frame precise annular tube composite channel group combination speaker systems of the two frame precise annular tube composite channel group of forward direction, expand the function of system further
As everyone knows, when sound is by thin sound pipe, the sound wave in thin sound pipe can regard plane wave as.Intermediate casing is increased between internal and external casing, form precise annular tube composite channel group, the ring pipe channel unit formed between adjacent intermediate casing and between outer tube and adjacent intermediate casing, even wherein the cross-sectional area of any one group of ring pipe channel unit all becomes less, when the sound wave that loudspeaker radiates goes out becomes more carefully narrow ring pipe channel unit by these, sound wave in these precise annular tube composite channel unit, can regard plane wave as.
When the rear end of the annular center-aisle unit in the precise annular tube composite channel group being arranged on external radiation sound before loud speaker, time as far as possible maximum close to loudspeaker vibrating body amplitude and the correspondence position of this circular passage unit, the then sound wave that gives off of loud speaker circular vibration body, by each channel unit to external radiation, area equation is vibrated in the equivalence controlled in the total annulus area of each channel unit and a certain frequency range of loud speaker, area before and after in each precise annular tube composite channel unit is not changed, and make each precise annular tube composite channel unit as far as possible consistent with radiated sound wave trajectory, the ripple of the sound wave that the vibrating body then passed through in each precise annular tube composite channel unit the gives off face that shakes is substantially constant, be similar in hollow tube and pass through plane wave, this can improve the radiation efficiency of the especially intermediate frequency of loud speaker.
Be arranged on the precise annular tube composite channel group of external radiation sound before loud speaker, the sound field of speaker playback sound can also be expanded, improve directive property and the ante-chamber effect of speaker system radiation sound.
Usually, the sound of loudspeaker radiates is directive, and this i.e. the so-called directivity of loudspeaker, and it is determined by the design principle of loud speaker, structure and the characteristic of itself.In forward direction speaker system with precision circular-tube compound channel set, the sound that loudspeaker vibration face gives off, given off by each annular mouth of pipe, therefore, by diameter and the direction of the outlet in adjustment ring pipe radiation channel, the direction of cone loudspeaker radiation sound can be changed, affect its directive property, regulate the sound field width of its radiative acoustic wave.
Ante-chamber effect usually occurs in a bit of scope before medium and low frequency loud speaker front taper basin, be arranged on the conical retaining piece in the precise annular tube composite channel of external radiation sound before loud speaker or passage group, to split and the medium and low frequency sound wave having stopped radiation everywhere on loud speaker taper cone face forms the approach of interference effect at ante-chamber, therefore greatly improve ante-chamber effect.
5, can, by a two frame precise annular tube composite channel group combination speaker system, directly the audio amplifier of casing not be had to use easily as one.Imagine and strengthened by the backward annular space of precise annular tube composite channel combination speaker system, two frame precise annular tube composite channel group combination speaker system class are similar to the speaker system of phase inverting box structure.
Again such as, to in precise annular tube composite channel group combination speaker system before and after two frame, forward direction precise annular tube composite channel or passage group are used for improving mid frequency radiated efficiency, backward precise annular tube composite channel group is used for improving low frequency radiation-efficiency, and imagine backward annular space and strengthen, in being similar to, phase inverting box structure of loudspeaker system that low frequency efficiency is higher.
6, in ring pipe passage or channel exit increase damping material, in order to the damping of the two frame precise annular tube composite channel group combination speaker system of flexible.
Damping situation in " a kind of speaker system ", depends on air three the main aspects in the damping of loud speaker, the impact of sound passage and casing, and it is very not convenient to regulate, and which has limited the Application Range of loud speaker.In order to utilize existing height damping value loud speaker more neatly, the present invention can in ring pipe passage or its port of export, or in some ring pipe channel unit or its port of export increase damping material, in order to the damping of regulating system if desired.
accompanying drawing illustrates:
Fig. 1 is the structural representation of two frame loud speaker.
Fig. 2 is to precise annular tube composite channel group combination speaker system configuration schematic diagram before and after two frame of being combined with forward direction precise annular tube composite channel of backward precise annular tube composite channel group.
Fig. 3 is to precise annular tube composite channel group combination speaker system configuration schematic diagram before and after two frame of being combined with forward direction precise annular tube composite channel group of backward precise annular tube composite channel group.
Embodiment
The present invention is further described below in conjunction with accompanying drawing and instantiation.
As shown in Figure 1, the present invention includes cone loudspeaker 1, described cone loudspeaker 1 comprises front frame 1-4 and rear frame 1-2, between front frame 1-4 and rear frame 1-2, form ring radiation mouth, also comprise front end to be arranged on rear end on front frame 1-4 and to be arranged on vibrating body cone 1-1 on rear frame 1-2 chassis, the sidewall front end of described front frame 1-4 is with flanging, and the rear end of described rear frame 1-2 is provided with the circular magnet 1-3 connecting upper and lower magnetic conductive board.There is between front frame 1-4 and rear frame 1-2 the space keeping vibrating body cone 1-1 normal vibration.There is between front frame 1-4 and rear frame 1-2 ring radiation opening.1-1 is coaxial with circular magnet 1-3 for vibrating body cone.
Also comprise the second inner sleeve 2 on excircle that front end is arranged on circular magnet 1-3 and coaxial with circular magnet 1-3; Also comprise the outer tube 3 coaxial with the second inner sleeve 2, the front end of outer tube 3 is fixedly mounted on front frame 1-4; Be connected to each other between outer tube 3 and the second inner sleeve 2.
To intermediate casing 15 arrange at least one between outer tube 3 and the second inner sleeve 2 after, backward intermediate casing 15 is coaxial with circular magnet 1-3; The front end of backward intermediate casing 15 be positioned at the backward peak swing place of vibration cone 1-2 correspondence position before and as far as possible near peak swing place; Backward intermediate casing 15, to be connected to each other between outer tube 3 and the second inner sleeve 2; Backward intermediate casing 15, formed between outer tube 3 and the second inner sleeve 2 at least after twice to circular passage unit 4-1;
Also comprise the first round table-like inner sleeve 5 of one section of axle centered by vibrating body cone 1-1 axes O, between the rear end root that the front end of the first inner sleeve 5 is airtight is connected to rear frame 1-2 to radiation port back edge, first inner sleeve 5 rear end aligns with the second inner sleeve 2 front end and is connected, between the first installation place, inner sleeve 5 front end and the second inner sleeve 2, form level and smooth round table-like transition face.For smoothly transitting between first inner sleeve 5 and the second inner sleeve 2.First inner sleeve 5 can also be smeared with cream pledge and smooth to corresponding position, solidifies rear formation.
In the rear circular passage unit 4-1 between intermediate casing 15 that the outer wall of the second inner sleeve 2 is adjacent with the second inner sleeve 2, several are installed and are connected block piece 13, or in the rear circular passage unit 4-1 between intermediate casing 15 that the inwall of outer tube 3 is adjacent with outer tube 3, several are installed and are connected block piece 13, or be all provided with several in each backward circular passage unit 4-1 and connect block piece 13, connection block piece 13 is solid or is obturator; Adjacent two connect for move towards consistent transaudient passage with backward circular passage 4 between block piece 13, and in same backward circular passage unit 4-1, each transaudient passage has consistent cross-sectional area along its transaudient direction.
The intersecting lens crossed between the section of described axes O and the second inner sleeve 2 side outer wall is L1, and between described section and outer tube 3 inwall is L2 with the intersecting lens of L1 the same side; L3, L4 is respectively with the intersecting lens of L1 the same side between the inwall of described section and backward forward direction intermediate casing 14 and outer wall; L1, L2, L3, L4 can be parallel to each other.
Be backward annular space 10 between backward forward direction intermediate casing 14, second inner sleeve 2 of the first inner sleeve 5 periphery and outer tube 3; The length of backward annular space 10 and described backward circular passage unit 4-1 is all less than or equal to 1/10 of the low-frequency resonant wave length of sound of speaker system.
Angle α=90 ° between L3, L4 and axes O, the second inner sleeve 2 and outer tube 3 are annular flat tabular for annular flat tabular or the first inner sleeve 5, second inner sleeve 2 and outer tube 3.
In backward ring pipe channel unit 4-1, damping material is installed.
As shown in Figure 2, the present invention also to comprise on flanging that rear end is arranged on front frame 1-4 and coaxial with vibrating body cone 1-1 before outer tube 7, be provided with in described front outer tube 7 coaxial with front outer tube 7 before inner sleeve 8.
Described front outer tube 8 and front inner sleeve 7 are by bracing frame connection fastened to each other.Forward direction ring pipe passage 6 is formed between front outer tube 8 and front inner sleeve 7.
Also comprise the cone shape barriers 9 of one section of axle centered by vibrating body cone 1-1 axes O, barriers 9 is coniform or round table-like, the rear end of barriers 9 is conical end or the little table top for round platform, and when the rear end of barriers 9 is the little table top of round platform, this little table top is plane or cambered surface; The rear end of barriers 9 is positioned at the front at vibrating body cone 1-1 maximum central amplitude place and near this peak swing place, the front end of barriers 9 aligns with front inner sleeve 8 rear end and is connected, and the outer wall of barriers 9 is even surface; For smoothly transitting between barriers 9 and front inner sleeve 8.
The intersecting lens crossed between the section of described axes O and front inner sleeve 8 side outer wall is L5, and between described section and front outer tube 7 inwall is L6 with the intersecting lens of L5 the same side; L5, L6 can be parallel to each other.
Angle between L5, L6 and axes O is the angular range of β, β is 0 °≤β≤90 °, when β 1 < β≤90 °, is provided with and moves towards several consistent block pieces with forward direction ring pipe passage 6 in forward direction ring pipe passage 6; Block piece is solid or is obturator, and be transaudient passage between adjacent two block pieces, each transaudient passage has consistent cross-sectional area along its transaudient direction.The determination mode of β 1 is as follows: as β < β 1, before and after forward direction ring pipe passage 6, cross-sectional area is basically identical, and forward direction ring pipe passage 6 substantially can as acoustic mass element.
Be annular space 11 between front outer tube 7 and retaining piece 9, annular space 11 and described ring pipe passage 6 are configured for the forward direction precise annular tube composite channel of radiant transfer loud speaker sound wave dorsad jointly.
The length of described ring pipe passage 6 and described annular space 11 is all less than or equal to 1/10 of the low-frequency resonant wave length of sound of the speaker system passed through in this tube passage.
Angle β=90 ° between L5, L6 and axes O, front inner sleeve 8 and outer tube 7 are annular flat tabular.
In forward direction ring pipe passage 6, damping material is installed.
As Fig. 3, also comprise at least one forward direction intermediate casing 14 between described front outer tube 7 and front inner sleeve 8, forward direction intermediate casing 14 is coaxial with vibration cone 1-2; The rear end of forward direction intermediate casing 14 is as far as possible near the peak swing place with vibrating body cone 1-1 forward direction correspondence position; Forward direction intermediate casing 14 is connected to each other with front inner sleeve 8 and front outer tube 7; Forward direction intermediate casing 14, between front inner sleeve 8 and front outer tube 7, form at least bipassage ring shape channel unit 6-1.
The intersecting lens crossed between the section of described axes O and front inner sleeve 8 side outer wall is L5, and between described section and front outer tube 7 inwall is L6 with the intersecting lens of L5 the same side; L7, L8 is respectively with the intersecting lens of L5 the same side between the inwall of described section and forward direction intermediate casing 14 and outer wall; L5, L6, L7, L8 can be parallel to each other.
Angle between L5, L6, L7, L8 and axes O is β, the angular range of β is 0 °≤β≤90 °, when β 1 < β≤90 °, in the circular passage unit 6-1 between the outer wall and the forward direction intermediate casing 14 adjacent with front inner sleeve 8 of front inner sleeve 8, several block pieces are installed, or in the circular passage unit 6-1 between the inwall and the forward direction intermediate casing 14 adjacent with front outer tube 7 of front outer tube 7, several block pieces are installed, or in the unit 6-1 of each circular passage, several block pieces are all installed; Block piece is solid or is obturator, and be the transaudient passage that trend is consistent with forward direction ring pipe channel unit 6-1 between adjacent two block pieces, in same circular passage unit 6-1, each transaudient passage has consistent cross-sectional area along its transaudient direction.
The determination mode of β 1 is as follows: as β < β 1, before and after forward direction circular passage 6, cross-sectional area is basically identical, and forward direction circular passage 6 substantially can as acoustic mass element.
Be forward direction annular space 11 between the forward direction intermediate casing 14 of barriers 9 periphery, front outer tube 7; The length of forward direction annular space 11 and described forward direction circular passage unit 6-1 is all less than or equal to 1/10 of the low-frequency resonant wave length of sound of speaker system.
Angle β=90 ° between L7, L8, L5, L6 and axes O, forward direction intermediate casing 14, front inner sleeve 8 and outer tube 7 is annular flat tabular.(being confined to the inclination angle of diffuser)
The correlation computations of two frame precise annular tube composite channel group combination speaker system:
For backward speaker system with precision circular-tube compound channel.In two frame precise annular tube composite channel group combination speaker system, the sound wave that loudspeaker vibrating body backward radiation goes out is exported by the ring radiation opening on speaker frame, enter backward annular space and the port of export through backward ring pipe passage outputs to outside passage, therefore the air in passage becomes a part for loud speaker, any instant, the air in passage becomes the most direct load of vibrating body.Because backward precise annular tube composite channel is narrow short, when speaker operation is in low frequency, the acoustic pressure that vibrating body produces is maintained a period of time in the passage of acoustic mass element place, therefore in passage, acoustic pressure raises, air load now in passage is strengthened the reaction of loudspeaker vibrating body, and backward speaker system with precision circular-tube compound channel creates stronger acoustic radiation.
Precise annular tube composite channel is made up of some short tubes for bass wavelength length of will resetting.During design; the cross-sectional area of the import and export of usual annular space passage is different; the cross-sectional area that ring pipe passage is imported and exported is identical; backward speaker system with precision circular-tube compound channel now; when speaker operation is in low frequency; backward annular space passage looping pipe acoustic transformer element, backward ring pipe passage looping pipe acoustic mass element.
Ring pipe acoustic transformer herein has two effects, one, acoustic transformer can by the mechanical impedance at its its two ends of no-load voltage ratio change sound, namely conversion acoustic mass element acts on the mechanical impedance on loud speaker, two, by the no-load voltage ratio amplification of acoustic transformer, the acoustic mass equivalence of acoustic mass element is increased to loud speaker one end, increase the equivalent mass that loud speaker is total, this can reduce the low frequency power resonance frequency of loud speaker, improves speakers low frequencies radiation efficiency.For " a kind of speaker system ", owing to making acoustic transformer with this smooth ring pipe passage, greatly reduce the energy loss of sound wave by its inside, the acoustic transformer of this structure can be done very accurate, this is also the implication of accurate two words in speaker system with precision circular-tube compound channel title of the present invention.
In backward speaker system with precision circular-tube compound channel, when speaker operation is in low frequency, because passage is acoustic mass element, air in its passage is not compressed, therefore ring pipe acoustic transformer element and ring pipe acoustic mass element have identical volume velocity, loudspeaker radiates sound wave can be without hindrance, lossless by after first passage, and be delivered in the air outside passage through passage, but this acoustic mass only speaker operation in low frequency time just exist, once loud speaker departs from low frequency enter mid-frequency region work, this acoustic mass also just disappears, visible loudspeaker vibration physical efficiency normally has bass area to turn to treble to work like a cork.
In backward speaker system with precision circular-tube compound channel, because backward annular space has identical coefficient of friction with backward ring pipe passage, the acoustical energy losses in backward precise annular tube composite channel is become a common acoustic loss element R by equivalence
a2(inner air tube motion is formed with the viscous friction of tube wall).Visible backward speaker system with precision circular-tube compound channel, the transaudient passage of its radiation is one and comprises acoustic transformer, acoustic mass element M
a2, acoustic loss element R
a2complex sound structure.
In admittance-type analogy substitutional connection, ring pipe acoustic transformer element and ring pipe acoustic mass element have the mechanical impedance change action at identical volume velocity and acoustic transformer two ends, be presented as the parallel relationship of two elements and the no-load voltage ratio of acoustic transformer, the no-load voltage ratio S of acoustic transformer
2/ S
1, reflect the mechanical impedance change action that this is connected on the acoustic transformer between loud speaker harmony mass elements, same the shake quality of acoustic mass equivalent action on loudspeaker vibrating body also will increased further in passage.
The relevant calculation of backward speaker system with precision circular-tube compound channel is as follows:
If outer tube is area is S
1round straight tube, simultaneously S
1effective vibrating body area when being also speakers low frequencies.Passage is circular straight channel, and area is S
2, length is in order to L
2.Then area is S
2passage in the quality .M of air
mA0=S
2* L
2* ρ
0, acoustic mass M
a0=M
mA0/ S
2 2=ρ
0l
2/ S
2, namely air quality, the acoustic mass of viewability channel are all directly proportional to the length of this passage, and acoustic mass in it and S
2area is inversely proportional to, its air quality and S
2area is directly proportional, and the feature of Here it is ring pipe acoustic mass element, this means that the acoustic mass in the ring pipe passage that a small cross sections is amassed is larger.
M
a0normalize to the S of loud speaker
1the equivalent mass in face is (S
1/ S
2)
2m
a0, wherein S
1/ S
2for the no-load voltage ratio of ring pipe acoustic transformer.Usual S
1be greater than S
2there is acoustic mass element when time more easily ensures passage medium and low frequency, therefore make S in application
1be greater than S
2, now (S
1/ S
2)
2m
a0be greater than M
a0.That is, the equivalent sound quality of the passage transformed on loudspeaker vibrating body through annular space acoustic transformer substantially increases.
When not considering that forward direction precise annular tube composite channel affects to the impact of precise annular tube composite channel after only considering, from speaker system low-frequency resonant formula ω 0=, the now total equivalent mass M of electrodynamic loudspeaker in backward precise annular tube composite channel
mcomprise cone basin equivalent mass, voice coil loudspeaker voice coil equivalent mass, vibrating body front with quality of shaking, the back side with the equivalence value (S of the acoustic mass of shake quality and backward ring pipe acoustic mass element
1/ S
2)
2m
a0, according to the feature of vibrating body radiation in sound pipe, in whole sound pipe, comprise loud speaker same mass M of shaking dorsad
mR2, in practical application, precise annular tube composite channel is a jitty, as long as the M of the therefore acoustic mass of backward ring pipe acoustic mass passage
a2equivalent mass (S
1/ S
2)
2m
a0be greater than loudspeaker vibrating body same mass M of shaking dorsad
mR2, total equivalent M of backward speaker system with precision circular-tube compound channel
mto increase.Now former loud speaker same mass M of shaking dorsad
mR2be included in (S
1/ S
2)
2m
a0in, namely now, the total equivalent oscillating mass M of backward speaker system with precision circular-tube compound channel
m=M
1+ M
2+ M
mR1+ (S
1/ S
2)
2m
a0, be greater than the total equivalent oscillating mass M of loud speaker when not having accurate ring sleeve
m=M
1+ M
2+ M
mR1+ M
mR2, visible, because adding (a S in backward speaker system with precision circular-tube compound channel
1/ S
2)
2m
a0value, makes the low-frequency resonant frequencies omega of loud speaker
0diminish, system creates the resonance frequency of lower power, can give off the sound of more low frequency.During this usage, the situation of backward precise annular tube composite channel group kind is identical with principle in backward precise annular tube composite channel.
In two frame precise annular tube composite channel group combination speaker system, the radiant transfer of sound wave in forward direction precise annular tube composite channel is identical in the rear operation principle to the radiant transfer in precise annular tube composite channel with sound wave.Therefore, above-mentioned computational methods and conclusion are not only applicable to backward speaker system with precision circular-tube compound channel, be equally applicable to forward direction speaker system with precision circular-tube compound channel, namely, the acoustic mass element that ring pipe passage in forward direction precise annular tube composite channel is formed, can make loud speaker increase (a S equally
1/ S
2)
2m
a0value, this also can make the low-frequency resonant frequencies omega of loud speaker
0diminish, system produces the resonance frequency of lower power, can give off the sound of more low frequency.During this usage, the situation in forward direction precise annular tube composite channel group is identical with principle in forward direction precise annular tube composite channel.
Claims (10)
1. pair frame precise annular tube composite channel group combination speaker system, comprise cone loudspeaker (1), it is characterized in that: described cone loudspeaker (1) comprises front frame (1-4) and rear frame (1-2), also comprise front end to be arranged on the upper rear end of front frame (1-4) and to be arranged on vibrating body cone (1-1) in rear frame (1-2), the rear end of described rear frame (1-2) is provided with circular magnet (1-3), and front frame (1-4), rear frame (1-2), magnet (1-3) are coaxial with vibrating body cone (1-1); There is between the rear end of front frame (1-4) and the front end of rear frame (1-2) space keeping vibrating body cone (1-1) normal vibration, and form ring radiation opening;
Also comprise the second inner sleeve (2) on excircle that front end is arranged on circular magnet (1-3) and coaxial with circular magnet (1-3), also comprise the outer tube (3) coaxial with the second inner sleeve (2), the front end of outer tube (3) is fixedly mounted in front frame (1-4);
Also be included between outer tube (3) and the second inner sleeve (2) and arrange at least one backward intermediate casing (15), backward intermediate casing (15) is coaxial with circular magnet (1-3); The front end of backward intermediate casing (15) is as far as possible near the peak swing place with vibrating body cone (1-1) backward correspondence position; Backward intermediate casing (15) is connected to each other with outer tube (3) and the second inner sleeve (2); Backward intermediate casing (15), formed between outer tube (3) and the second inner sleeve (2) at least after twice to circular passage unit (4-1).
2. according to claim 1 pair of frame precise annular tube composite channel group combination speaker system, it is characterized in that: round table-like the first inner sleeve (5) also comprising one section of axle centered by the axis of vibrating body cone (1-1) (O), the front end of the first inner sleeve (5) is airtight to be connected in rear frame (1-2), first inner sleeve (5) rear end aligns with the second inner sleeve (2) front end and is connected, for smoothly transitting between the first inner sleeve (5) and the second inner sleeve (2).
3. according to claim 1 pair of frame precise annular tube composite channel group combination speaker system, it is characterized in that: in the circular passage unit (4-1) between the backward intermediate casing (15) that the outer wall of the second inner sleeve (2) is adjacent with the second inner sleeve (2), several are installed and are connected block piece (13), or in the circular passage unit (4-1) between the backward intermediate casing (15) that the inwall of outer tube (3) is adjacent with outer tube (3), several are installed and are connected block piece (13), or several are all installed in each backward circular passage unit (4-1) and connect block piece (13), connect block piece (13) for solid or be obturator, adjacent two connect for move towards consistent transaudient passage with backward circular passage unit (4-1) between block piece (13), and in same backward circular passage unit (4-1), each transaudient passage has consistent cross-sectional area along its transaudient direction.
4. the two frame precise annular tube composite channel group combination speaker systems according to claim 1 or 2 or 3, it is characterized in that: the sidewall front end of described front frame (1-4) is with flanging, also comprise rear end and be arranged on front outer tube (7) on described flanging and coaxial with vibrating body cone (1-1), described front outer tube (7) inside is provided with the front inner sleeve (8) coaxial with front outer tube (7); Described front inner sleeve (8) and front outer tube (7) are connected to each other; Forward direction ring pipe passage (6) is formed between the outer wall of front inner sleeve (8) and the inwall of front outer tube (7).
5. according to claim 4 pair of frame precise annular tube composite channel group combination speaker system, it is characterized in that: also comprise at least one forward direction intermediate casing (14) be positioned between described front outer tube (7) and front inner sleeve (8), forward direction intermediate casing (14) is coaxial with vibrating body cone (1-1); The rear end of forward direction intermediate casing (14) is as far as possible near the peak swing place with vibrating body cone (1-1) forward direction correspondence position; Forward direction intermediate casing (14) is connected to each other with front inner sleeve (8) and front outer tube (7); Forward direction intermediate casing (14), between front inner sleeve (8) and front outer tube (7), form at least bipassage ring shape channel unit (6-1).
6. according to claim 4 pair of frame precise annular tube composite channel group combination speaker system, is characterized in that: in forward direction ring pipe passage (6), be provided with several block pieces; Block piece is solid or is obturator, and be the transaudient passage that trend is consistent with forward direction ring pipe passage (6) between adjacent two block pieces, each transaudient passage has consistent cross-sectional area along its transaudient direction.
7. according to claim 5 pair of frame precise annular tube composite channel group combination speaker system, it is characterized in that: in the circular passage unit (6-1) between the outer wall and the forward direction intermediate casing (14) adjacent with front inner sleeve (8) of front inner sleeve (8), several block pieces are installed, or in the circular passage unit (6-1) between the inwall and the forward direction intermediate casing (14) adjacent with front outer tube (7) of front outer tube (7), several block pieces are installed, or in each circular passage unit (6-1), several block pieces are all installed, block piece is solid or is obturator, be the transaudient passage that trend is consistent with forward direction ring pipe channel unit (6-1) between adjacent two block pieces, in same circular passage unit (6-1), each transaudient passage has consistent cross-sectional area along its transaudient direction.
8. according to claim 4 pair of frame precise annular tube composite channel group combination speaker system, is characterized in that: the retaining piece (9) also comprising one section of axle centered by the axis of vibrating body cone (1-1) (O); The front end of retaining piece (9) aligns with front inner sleeve (8) rear end and is connected, and the outer wall of retaining piece (9) is even surface; For smoothly transitting between retaining piece (9) and front inner sleeve (8); The rear end of described retaining piece (9) is positioned at the front at vibrating body cone (1-1) peak swing place and tries one's best near this peak swing place.
9. according to claim 6 pair of frame precise annular tube composite channel group combination speaker system, is characterized in that: the retaining piece (9) also comprising one section of axle centered by the axis of vibrating body cone (1-1) (O); The front end of retaining piece (9) aligns with front inner sleeve (8) rear end and is connected, and the outer wall of retaining piece (9) is even surface; For smoothly transitting between retaining piece (9) and front inner sleeve (8); The rear end of described retaining piece (9) is positioned at the front at vibrating body cone (1-1) peak swing place and tries one's best near this peak swing place.
10. according to claim 7 pair of frame precise annular tube composite channel group combination speaker system, is characterized in that: the retaining piece (9) also comprising one section of axle centered by the axis of vibrating body cone (1-1) (O); The front end of retaining piece (9) aligns with front inner sleeve (8) rear end and is connected, and the outer wall of retaining piece (9) is even surface; For smoothly transitting between retaining piece (9) and front inner sleeve (8); The rear end of described retaining piece (9) is positioned at the front at vibrating body cone (1-1) peak swing place and tries one's best near this peak swing place.
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| CN108989933A (en) * | 2018-07-16 | 2018-12-11 | 广州艺腾电子产品有限公司 | Headphone structure |
| CN110460937B (en) * | 2019-08-23 | 2021-01-26 | 深圳市神尔科技股份有限公司 | Focusing loudspeaker |
| CN111787472B (en) * | 2020-08-28 | 2022-03-22 | 歌尔光学科技有限公司 | Sound production structure, audio equipment and wear display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620010A1 (en) * | 1995-05-18 | 1996-11-21 | Bose Corp | Loudspeaker system with satellite housing |
| CN2532651Y (en) * | 2002-02-08 | 2003-01-22 | 石丰山 | Loudspeaker |
| CN1437427A (en) * | 2002-02-08 | 2003-08-20 | 石丰山 | New-type loudspeaker system |
-
2013
- 2013-01-27 CN CN201310029238.2A patent/CN103079155B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620010A1 (en) * | 1995-05-18 | 1996-11-21 | Bose Corp | Loudspeaker system with satellite housing |
| CN2532651Y (en) * | 2002-02-08 | 2003-01-22 | 石丰山 | Loudspeaker |
| CN1437427A (en) * | 2002-02-08 | 2003-08-20 | 石丰山 | New-type loudspeaker system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103079155A (en) | 2013-05-01 |
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