CN103096233A - Precise ring-shaped tube composite channel speaker system - Google Patents
Precise ring-shaped tube composite channel speaker system Download PDFInfo
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- CN103096233A CN103096233A CN2012105771389A CN201210577138A CN103096233A CN 103096233 A CN103096233 A CN 103096233A CN 2012105771389 A CN2012105771389 A CN 2012105771389A CN 201210577138 A CN201210577138 A CN 201210577138A CN 103096233 A CN103096233 A CN 103096233A
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Abstract
The invention discloses a high-property mid-bass speaker system and particularly relates to a precise ring-shaped tube composite channel speaker system. A ring-shaped short tube used for radiating sound of a speaker is arranged on the back of a mid-bass cone speaker to form a composite channel, a sound radiation environment of a vibration body is limited, and vibration radiation is influenced. When the speaker works in low frequency, the precise ring-shaped composite channel is formed by a ring-shaped tube acoustic transformator which is provided with an even section and formed by a ring-shaped area, and a ring-shaped tube acoustic quality component which is provided with an even section, is constant and is formed by a ring-shaped channel. Total equivalent vibration quality of the speaker is added due to the combined action of the acoustic transformator and the acoustic quality component, low-frequency resonant frequency of the speaker can be reduced, and low-frequency radiation efficiency of the speaker can be improved. The inner portion of the precise ring-shaped tube composite channel is smooth and clean, the speaker is surrounded in a large range, direct interference, caused by vibration of air inside a box body, of the surface of a vibration body is reduced, load of the surface of the vibration body is even, dynamic response speed is beneficially improved, and distortion is reduced.
Description
Technical field:
The accurate ring pipe composite channel of the present invention speaker system belongs to the electroacoustic techniques field.
Background technology:
In daily life, people are often with the loud speaker sound of resetting.In electrodynamic type commonly used, the bass cone loudspeaker (comprises bass, middle bass, Squawker and full range speaker, below also referred to as loud speaker) complete after, the resonance frequency omega 0 of the resonator system of its low frequency power has just been determined, ω 0 has determined the lower limit of this speaker playback sound frequency, and usually to be arranged on the loud speaker of working on infinitely great baffle as reference, the loud speaker frequencies omega is described
0Etc. index.In this case, be placed in the loud speaker on infinitely great baffle, directly the air of former and later two directions carried out free radiation transmission sound, its ω 0=, MM represents the total equivalent mass of electrodynamic loudspeaker, comprise that cone basin equivalent mass M1, voice coil loudspeaker voice coil equivalent mass M2, the positive same mass M MR1 that shakes of vibrating body, the back side are with shaking mass M MR2, i.e. MM=M1+M2+MMR1+MMR2; CM represents the total equivalent force of electrodynamic loudspeaker, comprises yoke ring mechanical compliance CM1, central washer mechanical compliance CM2, i.e. CM=.
Usually can only not utilize the baffle sound of resetting with such loud speaker, at that rate, the sound wave of the single spin-echo that former and later two directions of loudspeaker vibrating body give off can aloft mix mutually and offsets loss loud speaker sound reproduction ability.During use, loud speaker can not be arranged on infinitely great baffle and use, and it always together with audio amplifier, utilizes the baffle of sound box to cut apart, the sagittal acoustic irradiation of limiting loudspeaker vibrating body.Just the reference environment for use from loud speaker is different for these, will affect the performance of loud speaker.
But when loud speaker is contained on audio amplifier when consisting of sound box system and using, the loud speaker entrained acoustic energy of radiated wave behind is subject to the encirclement of casing, could not exhale in casing, can not directly be utilized, and these sound waves are affected by reflex back and forth to the vibrating body of loud speaker by the loudspeaker box internal environment also can, and the acoustic pressure of reflected wave, can disturb the vibration of loudspeaker vibrating body, further affect ability and the effect of loud speaker radiation sound, and, it is nearer for these object distance of loud speaker surrounding environment, affects also larger.The impact of this surrounding enviroment on the loud speaker radiation, be embodied in and changed the total equivalent MM of loud speaker, the numerical value of CM, also affected the low-frequency resonant frequency of loud speaker, therefore, the low-frequency range of speaker playback sound in sound box system is to be determined by loud speaker and sound box two aspect factors.For following formula, if the impact of sound box can make the total equivalent force CM of loud speaker of this moment or total equivalent mass MM strengthen, ω 0 is descended, the loud speaker more bass of can resetting out.
But actual conditions are opposite.Usually work as loud speaker external according to forward, dorsad the traditional approach of radiation sound in casing is arranged on the audio amplifier of common structure and uses, can not effectively increase its total equivalent mass MM, on the contrary, but always make its same shake quality and total equivalent force CM minimizing of vibrating body back side.As shown from the above formula, this will make the low-limit frequency of the sound that sound box system resets out, improve than the resonance frequency omega 0 of single loud speaker, cause loud speaker to lose the ability of some playback low-frequency sounds.
The reason that in above-mentioned situation, the total equivalent force CM of loud speaker reduces, because the air in audio amplifier consists of an acoustic compliance element, when loudspeaker vibrating body works in low frequency, it is just as a resilient spring, give from behind resiliency supported of loudspeaker vibrating body, from the loud speaker outside limits resonance of its vibrating body, make the moving difficulty that becomes of loud speaker low-frequency resonant, can not promote the original many like that sound of air radiation, so its low-frequency resonant frequency raises.Usually, the sound box volume is less, and the elasticity that the casing air produces is larger, compliance less (its coefficient of elasticity equals the inverse of compliance coefficient), and 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 to the existing mechanical compliance element of loud speaker itself, make loudspeaker vibrating body increase " bullet " property, reduce " suitable " property of the total equivalent force CM of vibrating body, caused its ω 0 to raise.This situation is in common sound box system, and is in the audio amplifiers such as airtight audio amplifier, reflex cabinet, all like this.That is, be combined formed sound box system with traditional loudspeaker box structure according to traditional loud speaker and occupation mode thereof, can't in use reduce the low-frequency resonant frequency of finished product loud speaker.
Therefore, allowing traditionally sound box system playback high-fidelity, the most popular method of lower frequency sounds more, is to adopt bigbore woofer.Heavy caliber woofer cone area is larger, can promote more air vibration radiation, and its vibrating body is also heavier, and this allows the total equivalent mass MM of loud speaker therefore strengthen, and ω 0 is descended.This dependence increases the way that the loudspeaker vibration weight reduces the loud speaker frequency, mean and to promote this loud speaker with 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 its vibration to produce larger motive force, therefore production and the use cost of this method are very high, and produce, debug also more complicated.During with heavy caliber woofer playback middle pitch, also can make dynamic response slow because its vibrating body is heavier, affect the middle pitch hi-fi reproduction, at this moment, for taking into account the playback of bass and middle pitch, often use simultaneously a heavy caliber woofer and a Squawker, reset respectively bass and middle pitch, but this causes higher cost and workload.
And, usually be arranged on when using on sound box when common medium and low spectrum loudspeaker, for fear of the impact of casing standing internal wave on loud speaker, loud speaker is not arranged on the middle of casing baffle usually, and to impose on the interference that vibrating body goes up dorsad be unbalanced to the reflected wave of various frequencies in this kind situation lower box, and this has also affected the load balancing of vibrating body, can affect its flexible vibratory, reduce reaction speed, the interference of reflected wave to vibrating body, also Caused Vibration distortion.
Patent of invention " a kind of New-type loudspeaker system " (patent No.: ZL02 2 12903.0) provides the acoustic mass in the transaudient sleeve pipe of special-purpose radiation that utilizes speaker operation loud speaker when low frequency, increase the total equivalent mass MM of loud speaker, effectively reduce the technology of the low frequency power resonance frequency of medium and low frequency loud speaker.
" a kind of New-type loudspeaker system " is the speaker system that is combined together to form by the passage that a medium and low spectrum loudspeaker and transaudient sleeve pipe consist of, the core work of " a kind of New-type loudspeaker system " be loudspeaker vibrating body a transaudient sleeve channel has been installed dorsad, be used for radiation, transmit loud speaker sound dorsad.Because this passage is to be connected on loud speaker unique passage of outside radiation sound dorsad, therefore, the vibration radiation energy of loud speaker is in the air load that is applied between sleeve pipe.
In " a kind of New-type loudspeaker system " when speaker operation during in low frequency, loud speaker is to one section narrow space of transaudient sleeve pipe front, consist of an acoustic compliance element CA, and be socketed in the air part of the annular space that between inside and outside two pipes on loud speaker, sectional area is identical, consist of the acoustic mass element.At this moment, on structure, " a kind of New-type loudspeaker system ", mainly loud speaker and an acoustic compliance element of a low frequency operation and the complex sound structure that acoustic mass element is connected formation mutually, when speaker operation during in low frequency, this is connected on the loud speaker acoustic mass of the acoustic mass element in passage behind, will become the part of speaker system oscillating mass, equivalence increases this acoustic mass item, and the total equivalent oscillating mass MM of speaker system increases.According to above-mentioned loud speaker low-frequency resonant frequency formula as can be known, this can reduce loud speaker low frequency power resonance frequency, causes loud speaker to give off than original lower low-frequency sound.
When " a kind of New-type loudspeaker system " being installed to when using on loudspeaker box, because being subject to transaudient sleeve pipe dorsad, surrounds on a large scale loudspeaker vibrating body, this has been avoided the reflective sound wave of various frequencies in casing to comprise that standing wave directly acts on vibrating body largely, this can improve the antijamming capability of loud speaker, and keep the loud speaker uniform balance of acoustic load dorsad, be conducive to improve the reaction speed of vibrating body.Particularly importantly, this acoustic mass only just exists during in low frequency in speaker operation, enter the intermediate frequency operation interval in case loud speaker breaks away from low frequency, this heavier load of the acoustic mass in transaudient sleeve pipe also just disappears, and loudspeaker vibrating body still can normally be worked like a cork.As seen, this structure has also solved well and has improved the ability of playback bass and the speed issue of playback middle pitch.
Usually, middle bass music, song due to speaker system playback in most cases, seldom long time continuous working is in the bass state, the acoustic mass that exists in transaudient sleeve channel when therefore " a kind of New-type loudspeaker system " is with low frequency operation improves the total equivalent oscillating mass MM of loud speaker, reduce the method for common finished product medium and low spectrum loudspeaker low-frequency resonant frequency, the utmost point has essential meaning, than common woofer, this way had both been saved a large amount of precious materials, affected hardly again the operating rate of loud speaker intermediate frequency one band.Therefore, no matter " a kind of New-type loudspeaker system " is being realized on the bass technical method, or aspect the structure of speaker system, all not identical with common medium and low spectrum loudspeaker, it has developed the medium and low spectrum loudspeaker technology.
But, find by further research, " a kind of New-type loudspeaker system " structurally also exists some problems, and the performance that this has affected this systematic function and ability is necessary its Improvement and perfection, in order to further improve performance and the function of system.
Mainly deposit following several problem on " a kind of New-type loudspeaker system " structure, principle and performance:
One, the channel space of loudspeaker vibrating body to the transaudient cover tube inlet, consists of an acoustic compliance element CA, and CA has comprised in speaker frame root junction to thereafter magnet front this section space and has uneven path.The loud speaker uneven surface that this section is exposed, can stop the sound wave generation of vibration radiation and cause reflection, cause distortion and acoustical energy losses in the sound wave transmittance process, simultaneously, due to the restriction of transaudient sleeve structure, retrained the loud speaker radiant transfer path of sound wave behind, the acoustic pressure of cone vibrating body institute radiative acoustic wave is less along channel attenuation, higher acoustic pressure is arranged in transaudient sleeve channel, reflection also can cause the interference stronger to vibrating body in this case, make the vibration distortion, and make the sound wave distortion of its radiation.That is, the various reflections that in passage, sound wave produces can cause distortion totally three kinds of distortions of transmitting sound wave in vibration distortion, radiative acoustic wave distortion and the passage of vibrating body.And acoustic compliance element CA does not have help to the resonance frequency that reduces loud speaker, also makes equivalent electric circuit complicated, is unfavorable for simplification and the intuitive analysis of problem.
Two, the porch of CA element additional space, variation has occured in the path area of air stream warp,, in this speaker system, in the front end spaces in loud speaker space, acoustic mass element place to the transaudient sleeve pipe, is implying an acoustic transformer that is.But be connected connection gap between magnet with upper conduction magnetic board owing to there being speaker frame in passage, and upper conduction magnetic board and magnet upper end surface are with the reflecting surface towards vibrating body, make in this passage by means of these exposed parts formation of loud speaker unsmooth, sound wave is in reflect and cause distortion and acoustical energy losses herein, due to these distortions and and the uncertainty of acoustical energy losses, affected the accuracy of the implicit due transform effect of acoustic transformer of CA.
Three, the loud speaker inner surface of the basin frame supporting surface around the acoustic irradiation mouth dorsad, the sound wave that has stopped the vibrating body radiation is the path of homogeneous radiation backward, make the sound wave distortion of radiation, affect radiation efficiency, and because whole transaudient sleeve channel is narrow, higher acoustic pressure is arranged in transaudient sleeve channel, the acoustic pressure of cone vibrating body institute radiative acoustic wave is little along channel attenuation, can closely at once produce the reflection of higher-strength, disturb the vibration of vibrating body, the vibration of Caused Vibration body and radiation distortion.
Four, simply provided the mode of the equal acoustic mass element of a kind of sectional area that is consisted of by two straight pipes in " a kind of New-type loudspeaker system ", and the transaudient passage that consists of between the transaudient passage between two round types that connect together and two plectanes in fact is unequal along the sectional area of channel direction, in order to make its requirement of satisfying transaudient sleeve pipe acoustic mass, need re-construct the acoustic mass element between them.Therefore, improve between round type comprehensively and two plectanes between the construction method of acoustic mass element in the transaudient passage that forms.
The problems referred to above one, two relevant with the acoustic compliance element CA in transaudient sleeve pipe, and, acoustic compliance element CA is relevant with the transaudient channel design of acoustic transformer element and radiation, therefore, must redesign this acoustic compliance element CA in transaudient sleeve channel, and rigorous structure acoustic transformer element, also to improve the loud speaker shelf structure in addition, improve the construction method of acoustic mass element.As seen, performance and function for General Promotion " a kind of New-type loudspeaker system " must rebuild the transaudient sleeve channel in " a kind of New-type loudspeaker system " comprehensively.
Summary of the invention
Technical problem to be solved by this invention is: a kind of accurate ring pipe composite channel speaker system is provided, solution is because of the loud speaker inner surface of the basin frame supporting surface around the acoustic irradiation mouth dorsad, the sound wave that stops the radiation of vibrating body cone is the path of homogeneous radiation backward, cause the radiative acoustic wave distortion, affect the problem of radiation efficiency; Also solve distortion and acoustical energy losses that in passage, in the sound wave transmittance process, the reflecting surface in the space at CA place causes, and by solve in CA distortion and and acoustical energy losses and uncertainty thereof; Also improve the accuracy of the transform effect of acoustic transformer implicit in CA; Also solve the formation problem of the acoustic mass element in the circular passage that forms between internal and external casing when internal and external casing is not straight tube; By increase damping material in the ring pipe passage, can also regulate the damping of speaker system.To overcome the defective of existing speaker system.
The technical solution adopted for the present invention to solve the technical problems is as follows:
Accurate ring pipe composite channel speaker system, comprise cone loudspeaker, described cone loudspeaker involving vibrations body cone and with the basin frame of radiation port, described basin frame is made of basin frame chassis, basin frame sidewall, basin frame sidewall front end is with flanging, and the rear end of described basin frame is equipped with circular magnet; Comprise that also front end is arranged on the excircle of circular magnet and second inner sleeve coaxial with circular magnet; Also comprise the outer tube coaxial with the second inner sleeve, the radiation port of basin frame is positioned at the inside of outer tube; Form the ring pipe passage between the outer wall of the second inner sleeve and the inwall of outer tube, it is characterized in that:
The first inner sleeve that also comprises one section axle centered by vibrating body cone axes O, the airtight rear end root of basin frame that is connected to of the front end of the first inner sleeve is between the radiation port back edge, the first inner sleeve rear end aligns with the second inner sleeve front end and is connected, and forms level and smooth transition face between the rear end of basin frame root and the second inner sleeve
The intersecting lens of crossing the outer wall of the section of circular magnet axes O and the second inner sleeve one side is L1, and the intersecting lens of the outer sleeve inner wall of described section and L1 the same side is L2; L1 and L2 are parallel to each other.
Trend is installed in the ring pipe passage moves towards consistent some groups of block pieces with the ring pipe passage, block piece is solid or is obturator, is transaudient passage between adjacent block piece, and each transaudient passage has consistent cross-sectional area along its transaudient trend.
Described basin frame sidewall is fitted and is arranged on the inwall of outer tube, is connected with some brace rods between described basin frame chassis and sidewall, is radiation port between the adjacent supports muscle.
Be annular space between outer tube and the first inner sleeve; The length of the first inner sleeve and the length of described annular space all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
In the ring pipe passage, damping material is installed.
Angle α between L1, L2 and axes O=90 °, the first inner sleeve, outer tube and the second inner sleeve are the tabular or outer tube of annular flat and the second inner sleeve, and to be annular flat tabular.
Good effect of the present invention is:
The present invention four main aspect, " a kind of New-type loudspeaker system " carried out important improvement, raising and perfect, accurate ring pipe composite channel speaker system performance boost after improving, usage is flexible and changeable.
1, accurate ring pipe acoustic transformer element of structure, improved environment in passage, distortion and acoustical energy losses that this section passage stops, reflects and cause sound wave have greatly been reduced, system class is simplified than circuit, can farthest improve same the shake quality of acoustic mass element equivalent action on loudspeaker vibrating body, reduce the low-frequency resonant frequency of loud speaker, minimizing vibrating body surface is subjected to the direct interference of air vibration in casing, the vibrating body surface loading is even, improve dynamic response speed, reduce distortion.
In " a kind of New-type loudspeaker system " passage, two place's acoustical energy losses are arranged, one in channel space, is hindered by object acoustic reflection is produced; One on the tube wall of passage, by the pipe friction generation of air and passage.The acoustic compliance element CA that consists of to the space that is limited by outer tube of speaker magnet front after speaker frame in passage, it is the element of a two-port, usually the area of its input port, delivery outlet is different, and on this meaning, the CA space is identical with an acoustic transformer component space.But in the space at CA place, exposed magnet and speaker frame root junction be some uneven surfaces like this, when sound wave passes through this zone, can reflect these local generations, sound energy consumption, and due to the CA narrow space, reflection can form than strong jamming vibrating body, affect loudspeaker vibration, cause distortion and the acoustical energy losses of the vibration of vibrating body cone and radiant transfer process, and this point, CA is different from acoustic transformer, just on spatial relationship, implying an acoustic transformer in CA.Because CA reduces frequency without any positive effect to " a kind of New-type loudspeaker system ", in equivalent electric circuit, it also makes complex circuit, is not easy to analyze.Uneven surface in transaudient sleeve channel in space, acoustic compliance element CA place has affected the efficient of medium and low frequency radiation and the fidelity of sound to transmitting the blocking reflected of sound wave, and it is uneven that the amplitude-frequency characteristic of intermediate frequency becomes.therefore, in accurate ring pipe composite channel speaker system, by increasing by the first inner sleeve, between the first inner sleeve and outer tube, built a smooth annular space, the uneven space that has replaced " a kind of New-type loudspeaker system " acoustic compliance element CA place, improved environment in passage, greatly having reduced this section passage stops sound wave, reflection and the distortion and the acoustical energy losses that cause, system class is simplified than circuit, can farthest improve same the shake quality of acoustic mass element equivalent action on loudspeaker vibrating body, reduce the low-frequency resonant frequency of loud speaker.
accurate ring pipe composite channel is combined with loud speaker, be arranged on the forward of loud speaker, just construct accurate ring pipe composite channel speaker system, when the ring pipe passage is an acoustic mass element, the equivalent sound quality of the ring pipe acoustic mass element in system, can increase total equivalent mass of loud speaker, this can reduce the low-frequency resonant frequency of loud speaker, transaudient sleeve channel in " a kind of New-type loudspeaker system ", the distortion and the energy loss that do not have reflecting surface to cause due to the inner brilliance of accurate ring pipe composite channel group, greatly improved the amplitude-frequency characteristic of the medium and low frequency of speaker system output, make amplitude-frequency characteristic more level and smooth, sound is fidelity more.Accurate ring pipe composite channel group internal structure is regular, and major parameter wherein is programmable very accurate, is conducive to industrial standardization production.Be combined by accurate ring pipe composite channel the accurate ring pipe composite channel speaker system that forms with loud speaker, can further reduce the low-frequency resonant frequency of loud speaker on the principle.
Accurate ring pipe composite channel inside is bright and clean, and loud speaker is surrounded on a large scale, has reduced the direct interference that the vibrating body surface is subjected to air vibration in casing, and the vibrating body surface loading is even, is beneficial to improve dynamic response speed, reduce distortion.Common acoustic transformer is to form in one is imported and exported the different hollow container of area, and the acoustic transformer in the accurate ring pipe composite channel of the present invention speaker system is that the annular space between by all means consists of by two, is different from general constructive method.
2, a kind of formation method of the acoustic mass element of other several primary structures in transaudient sleeve channel in perfect " New-type loudspeaker system ", the structural change of accurate ring pipe composite channel speaker system is many, and usage is more flexible.
In " a kind of New-type loudspeaker system ", when the sound pipe that consists of transaudient passage is shaped as expand outwardly round table-like, will change along the annulus area of channel direction, the acoustic mass element between this moment internal and external casing will not exist.In order to make still have the acoustic mass element in the circular passage this moment, must channel interior along channel direction re-construct out sectional area just as the space, as the acoustic mass element.
The basic comprising mode of the ring pipe acoustic mass element in accurate ring pipe composite channel speaker system is by even, the identical straight circular air duct of one section sectional area that forms between the second inner sleeve and outer tube.For other needs, the also ring pipe passage of truncated conical shape, but can not directly form an acoustic mass element in this structure space, need re-construct the acoustic mass element in this passage.For this reason, in accurate ring pipe composite channel speaker system, also further expand, perfect when passage be a round table-like circular passage, and even the table top of this round table-like circular passage further expansion makes the inside and outside tube wall of passage be expanded to the plan position approach, become inside and outside two plane plectanes, be round table-like circular passage when becoming two passages between the plectane of plane, the generation type of interchannel acoustic mass element.These above-mentioned variations have guaranteed accurate ring pipe composite channel shape and have used more versatile and flexible.
For this reason, the accurate ring pipe composite channel of the present invention speaker system, by increase the trend some group block pieces consistent with the ring pipe passage in the sound passage, make and be enclosure space between every group of block piece, consist of new transaudient passage between the two adjacent groups block piece, and make each transaudient passage have consistent cross-sectional area along its trend, even round table-like sound pipe has the different angles that expands outwardly, between two pipes in formed annular space, can construct simply, neatly the acoustic mass element, fall low-frequency requirement to satisfy.Equally, when round table-like circular passage becomes two passages between the plectane of plane, also can re-construct in this way the acoustic mass element between two plectanes.
As seen after taking these measures, expand, perfect other several main composition modes of acoustic mass element in passage, fundamentally guaranteed sound mass elements existence all the time in passage, this has just guaranteed the effect of the reduction power resonance frequency of accurate ring pipe composite channel structure of loudspeaker system, and it is more flexible, free that channel shape is selected, and makes its structure that adaptability widely be arranged.
3, the transformation loud speaker affects the basin shelf structure of acoustic radiation, reduces basin frame internal surface area to the reflection of basin frame vibration radiation, reduces the distortion of radiation sound, improves fidelity and the radiation efficiency of sound.
Loud speaker in accurate ring pipe composite channel speaker system can be a common medium and low spectrum loudspeaker, can be also a medium and low spectrum loudspeaker that improves the loud speaker shelf structure.Its accurate transmission sound passage, can critically transmit sound wave, but when common medium and low spectrum loudspeaker consists of accurate ring pipe composite channel speaker system, the sound wave of loudspeaker vibrating body radiation will enter transaudient passage by the radiation port on speaker frame lateral support face, and the remainder outside the acoustic irradiation mouth on basin frame supporting surface, also can produce the blocking reflected effect to radiated wave, and because of its position very near apart from vibrating body, reflected wave can disturb the vibrating body normal vibration immediately, and causes vibration distortion etc.Therefore, when need further improve the performance of radiant transfer sound of this system, also to do necessary improvement to speaker frame.In order to improve the acoustic radiating efficient of speaker operation when the intermediate frequency, also need to reduce speaker frame stopping the vibrating body radiative acoustic wave.
As claimed in claim 4, improved speaker frame, the sidewall of described basin frame is fitted and is arranged on the inwall of outer tube, is connected with some brace rods between the chassis of described basin frame and sidewall, is radiation port between every two brace rods.Use cylindricality muscle structure, can guarantee on the support strength basis of speaker frame, reduce the Area of bearing of plate shaped basin frame, this has just reduced the area of basin frame towards the one side of loudspeaker vibrating body, also just reduces the acoustic reflection on it by the sound wave effect of the direct radiation of vibrating body cone.
Can also strengthen simply the area of the acoustic radiating stomatodeum on the basin frame, reduce basin frame support section area, and the radiation perforate is evenly distributed.Like this, both reduced the stopping of the radiative acoustic wave that passed through, made again the basic uniformity of radiated wave form before and after basin frame radiation port.
The accurate ring pipe composite channel that consists of with improved loud speaker and basin shelf structure is from more this has guaranteed that in accurate ring pipe passage, air is incompressible, and volume velocity does not change, and therefore, can ignore the acoustic compliance value of first passage.Thoroughly eliminated like this impact of acoustic compliance element CA in " a kind of New-type loudspeaker system " in the analogy line map, it is more succinct, clear and definite that the analogy circuit becomes.
Channel interior further reduced the stopping and reflect of radiative acoustic wave, and had reduced the distortion and the acoustical energy losses that produce in passage, also was conducive to speaker system and produced medium and low frequency sound larger, more fidelity.Enlarged the loud speaker of the discharge area of radiation channel after improvement, resemble a more accurate stiff piston during low frequency, if import ripple that the sound wave of accurate ring pipe composite channel the is consistent face that shakes into by radiation port, can also improve the radiation efficiency of speaker system intermediate frequency.Usually, the area minimizing under the prerequisite that guarantees structural strength of the rib supporting surface of basin frame is not less than 50%, and this has increased substantially radiating aperture gross area accounting.
4, increased damping material in order to the damping situation in the damping " a kind of New-type loudspeaker system " of the accurate ring pipe composite channel of flexible speaker system in the circular passage, depend on the damping of loud speaker, the impact of sound passage and three the main aspects of air in casing, it is very not convenient to regulate, and this has limited the Application Range of loud speaker.In order to utilize more neatly existing height damping value loud speaker, the present invention can be in the circular passage or the port of export increased damping material, in order to the damping of adjustment precision ring pipe composite channel speaker system in case of necessity.
By above analysis as can be known, accurate ring pipe composite channel can be with, potent influence more useful than transaudient sleeve channel, improve the loudspeaker vibration quality, reduce the low-frequency resonant frequency of loud speaker, greatly improve low frequency radiation ability and the efficient of loud speaker, and make the amplitude-frequency characteristic of system flatten and reduce distortion.Because of accurate ring pipe composite channel reasonable in internal structure, major parameter wherein is programmable more accurate, is conducive to industrial standardization production.Therefore accurate ring pipe composite channel speaker system, performance that can the overall effect loud speaker, it is a kind of than " a kind of New-type loudspeaker system " more accurate, efficient speaker system.
5, can with so accurate ring pipe composite channel speaker system, directly use as an easy audio amplifier without sound box.
Description of drawings:
Fig. 1 is structural representation of the present invention.
Embodiment
Further describe the present invention 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 with the basin frame 1-1 of radiation port and is arranged on vibration cone 1-2 on basin frame 1-1 chassis.The rear end of described basin frame 1-1 is equipped with the circular magnet 1-3 that connects the up and down magnetic conductive board.
The present invention comprises that also front end is arranged on the excircle of circular magnet 1-3 and second inner sleeve 2 coaxial with circular magnet 1-3, and the present invention also comprises the outer tube 3 coaxial with the second inner sleeve 2, and basin frame radiation port is positioned at the inside of outer tube 3.Form ring pipe passage 4 between the inwall of the outer wall of the second inner sleeve 2 and outer tube 3.Described circular magnet 1-3 is coaxial with vibration cone 1-2.
Crossing the vertical flat cutting face of axes O of vibrating body cone 1-2 and the intersecting lens between the second inner sleeve 2 one side outer walls is L1, and the intersecting lens of outer tube 3 inwalls of described section and L1 the same side is L2.L1 and L2 are parallel to each other.
The the first round table-like inner sleeve 5 that also comprises one section axle centered by vibrating body cone 1-2 axes O, the airtight rear end root of basin frame 1-1 that is connected to of the front end of the first inner sleeve 5 is between the radiation port back edge, the first inner sleeve 5 rear ends align with the second inner sleeve 2 front ends and are connected, and form level and smooth round table-like transition face between the first inner sleeve 5 front end installation places and the second inner sleeve 2.Be smooth transition between the first inner sleeve 5 and the second inner sleeve 2.The first inner sleeve 5 can also be smeared with the cream pledge and smooth to corresponding position, solidifies rear formation.
Be annular space 10 between outer tube 3 and the first inner sleeve 5, annular space 10 and described ring pipe passage 4 are configured for the accurate ring pipe composite channel of radiant transfer loud speaker sound wave dorsad jointly.
Angle between L1, L2 and axes O is α, and the angular range of α is 0 °≤α≤90 °, when α 1＜α≤90 °, the trend some group block pieces consistent with ring pipe passage 4 is installed in ring pipe passage 4.Being enclosure space in block piece, is transaudient passage between adjacent block piece, and each transaudient passage has consistent cross-sectional area along its trend.Block piece can be clapboard.
Definite mode of α 1 is as follows: when α＜α 1, ring pipe passage 4 cross-sectional area on the trend of front and back is basically identical, and ring pipe passage 4 can be used as the acoustic mass element substantially.
During α=90 °, the first inner sleeve 5, outer tube 3 and the second inner sleeve 2 are the tabular or outer tube 3 of annular flat and the second inner sleeve 2 to be annular flat tabular.
The ratio that the gross area of described radiation port accounts for the basin frame 1-1 sidewall gross area is as far as possible large under the prerequisite that guarantees structural strength, such as being not less than 80%.
The form of basin frame 1-1 can also be: its sidewall is fitted and is arranged on the inwall of outer tube 3, is connected with some brace rods between the chassis of described basin frame 1-1 and sidewall, is radiation port between the adjacent supports muscle.
The operation principle of accurate ring pipe composite channel speaker system:
In accurate ring pipe composite channel speaker system, the sound wave that the loudspeaker vibrating body backward radiation goes out is exported by the radiation port on speaker frame, enter annular space and output to outside passage through the port of export of ring pipe passage, therefore the air in passage becomes the part of loud speaker, in arbitrary moment, the air in passage becomes the most direct load of vibrating body.Because accurate ring pipe composite channel is narrow short, when speaker operation during 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 sound pipe, acoustic pressure raises, the interior air load of pipe this moment is strengthened the reaction of loudspeaker vibrating body, and accurate ring pipe composite channel speaker system has produced stronger acoustic radiation.
Because the internal and external casing that consists of first and second ring pipe passage is all short tube, so first passage is all jitty.Be accurate ring pipe composite channel, be by some for the bass wavelength length of will resetting short tube consist of.According to definition, the low-frequency sound wave wavelength that passes through in less than this tube passage when the size of the diameter of section size of ring pipe passage and length 1/10 the time, this passage is jitty.During design; usually the cross-sectional area of the mouth of entering of annular space passage is different; the cross-sectional area that ring pipe passage passage is imported and exported is identical; the accurate ring pipe composite channel speaker system of this moment; when speaker operation during in low frequency; annular space passage looping pipe acoustic transformer element, ring pipe passage looping pipe acoustic mass element.
Ring pipe acoustic transformer herein has two effects, one, acoustic transformer can be by the mechanical impedance at its two ends of its no-load voltage ratio change sound, be that conversion acoustic mass element acts on the mechanical impedance on loud speaker, two, pass through 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 total equivalent mass of loud speaker, this can reduce the low frequency power resonance frequency of loud speaker, improves the loud speaker low frequency radiation-efficiency.For " a kind of New-type loudspeaker system ", owing to making acoustic transformer with this smooth ring pipe passage, greatly reduced sound wave by its inner energy loss, make the acoustic transformer of this structure can do very accurately, this is also the implication of accurate two words in the accurate ring pipe composite channel of the present invention speaker system title.
in accurate ring pipe composite channel speaker system, when speaker operation during in low frequency, because passage is the 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, the loud speaker radiative acoustic wave can be without hindrance, lossless by after first passage, and in the air outside passage is delivered to passage, but this acoustic mass only just exists during in low frequency in speaker operation, in case breaking away from low frequency, loud speaker enters the intermediate frequency regional work, this acoustic mass also just disappears, as seen the loudspeaker vibration physical efficiency normally has bass area to turn to treble work like a cork.
In accurate ring pipe composite channel speaker system, because first passage and passage have identical coefficient of friction, the acoustical energy losses in accurate ring pipe composite channel is become a common acoustic loss element R by equivalence
A2(the inner air tube motion forms with the viscous friction of tube wall).As seen accurate ring pipe composite channel speaker system, the transaudient passage of its radiation is a complex sound structure that comprises acoustic transformer, acoustic mass element MA2, acoustic loss element RA2.
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 relation in parallel of two elements and the no-load voltage ratio of acoustic transformer, the no-load voltage ratio S of acoustic transformer
2/ S
1, reflected that this is connected on the mechanical impedance change action of the acoustic transformer between loud speaker harmony mass elements, also will further increase same the shake quality of acoustic mass equivalent action on loudspeaker vibrating body in passage.
Be calculated as follows:
If outer tube is area is S
1Round straight tube, S simultaneously
1Effective vibrating body area when being also the loud speaker low frequency.Passage is circular straight channel, and area is S
2, length is for L
2Area is the quality .M of the passage Air of S2
MA0=S
2* L
2* ρ
0, acoustic mass M
A0=M
MA0/ S
2 2=ρ
0L
2/ S
2, the air quality of viewability channel, acoustic mass all are directly proportional namely to the length of this passage, and acoustic mass and S in it
2Area is inversely proportional to, its air quality and S
2Area is directly proportional, and the characteristics of Here it is ring pipe acoustic mass element this means that the acoustic mass in the long-pending ring pipe passage of a small cross sections is larger.
M
A0Normalize to the S of loud speaker
1The equivalent mass of face is (S
1/ S
2)
2M
A0, wherein S1/S2 is the no-load voltage ratio of ring pipe acoustic transformer.Common S
1Greater than S
2There is the acoustic mass element when time more easily guarantees the passage medium and low frequency, makes S in therefore using
1Greater than S
2, (S at this moment
1/ S
2)
2M
A0Greater than M
A0That is the equivalent sound quality that, transforms to the passage on loudspeaker vibrating body through the first passage acoustic transformer has improved greatly.
By speaker system low-frequency resonant formula ω 0=as can be known, this moment, the electrodynamic loudspeaker total equivalent mass MM of system comprised that cone basin equivalent mass, voice coil loudspeaker voice coil equivalent mass, vibrating body are positive with the quality of shaking, the back side equivalence value (S with the acoustic mass of shake quality and ring pipe acoustic mass element
1/ S
2)
2M
A0, according to the characteristics of vibrating body radiation in sound pipe, comprising the loud speaker same mass M MR2 that shakes dorsad in whole sound pipe, as long as in practical application, accurate ring pipe composite channel is a jitty, therefore the M of the acoustic mass of ring pipe acoustic mass passage
A2Equivalent mass (S
1/ S
2)
2M
A0Greater than the loudspeaker vibrating body same mass M of shaking dorsad
MR2, total equivalent MM of accurate ring pipe composite channel speaker system increases, and the former loud speaker this moment same mass M MR2 that shakes dorsad is included in (S
1/ S
2)
2M
A0In, at this moment namely, the total equivalent oscillating mass MM=M1+M2+MMR1+(S of accurate ring pipe composite channel speaker system
1/ S
2)
2M
A0, the total equivalent oscillating mass MM=M1+M2+MMR1+MMR2 of loud speaker when there is no accurate ring sleeve, as seen, in accurate ring pipe composite channel speaker system because having increased (a S
1/ S
2)
2M
A0Be worth, make the low-frequency resonant frequencies omega of loud speaker
0Diminish, system has produced the resonance frequency of lower power, can give off the more sound of low frequency.
Claims (10)
1. accurate ring pipe composite channel speaker system, comprise cone loudspeaker (1), described cone loudspeaker (1) involving vibrations body cone (1-2) and with the basin frame (1-1) of radiation port, described basin frame (1-1) is made of basin frame chassis, basin frame sidewall, basin frame sidewall front end is with flanging, and the rear end of described basin frame (1-1) is equipped with circular magnet (1-3); Comprise that also front end is arranged on the excircle of circular magnet (1-3) and second inner sleeve (2) coaxial with circular magnet (1-3); Also comprise the outer tube (3) coaxial with the second inner sleeve (2), the radiation port of basin frame (1-1) is positioned at the inside of outer tube (3); Form ring pipe passage (4) between the inwall of the outer wall of the second inner sleeve (2) and outer tube (3), it is characterized in that:
The first inner sleeve (5) that also comprises one section axle centered by vibrating body cone (1-2) axes O, the airtight rear end root of basin frame (1-1) that is connected to of the front end of the first inner sleeve (5) is between the radiation port back edge, the first inner sleeve (5) rear end aligns with the second inner sleeve (2) front end and is connected, and forms level and smooth transition face between the rear end root of basin frame (1-1) and the second inner sleeve (2).
2. accurate ring pipe composite channel speaker system according to claim 1, it is characterized in that: the intersecting lens of crossing the outer wall of the section of circular magnet (1-3) axes O and the second inner sleeve (2) one sides is L1, and the intersecting lens of outer tube (3) inwall of described section and L1 the same side is L2; L1 and L2 are parallel to each other.
3. accurate ring pipe composite channel speaker system according to claim 1 and 2, it is characterized in that: trend is installed in ring pipe passage (4) moves towards consistent some groups of block pieces with ring pipe passage (4), block piece is solid or is obturator, be transaudient passage between adjacent block piece, each transaudient passage has consistent cross-sectional area along its transaudient trend.
4. accurate ring pipe composite channel speaker system according to claim 1 and 2, it is characterized in that: described basin frame sidewall is fitted and is arranged on the inwall of outer tube (3), being connected with some brace rods between described basin frame chassis and sidewall, is radiation port between the adjacent supports muscle.
5. accurate ring pipe composite channel speaker system according to claim 3, it is characterized in that: described basin frame sidewall is fitted and is arranged on the inwall of outer tube (3), being connected with some brace rods between described basin frame chassis and sidewall, is radiation port between the adjacent supports muscle.
6. accurate ring pipe composite channel speaker system according to claim 1 and 2, is characterized in that: be annular space (10) between outer tube (3) and the first inner sleeve (5); The length of the length of the first inner sleeve (5) and described annular space (10) all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
7. accurate ring pipe composite channel speaker system according to claim 3, is characterized in that: be annular space (10) between outer tube (3) and the first inner sleeve (5); The length of the length of the first inner sleeve (5) and described annular space (10) all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
8. accurate ring pipe composite channel speaker system according to claim 1 and 2, it is characterized in that: the ring pipe passage is equipped with damping material in (4).
9. accurate ring pipe composite channel speaker system according to claim 3, it is characterized in that: the ring pipe passage is equipped with damping material in (4).
10. accurate ring pipe composite channel speaker system according to claim 2, it is characterized in that: the angle α between L1, L2 and axes O=90 °, the first inner sleeve (5), outer tube (3) and the second inner sleeve (2) are the tabular or outer tube (3) of annular flat and the second inner sleeve (2) to be annular flat tabular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577138.9A CN103096233B (en) | 2012-12-27 | 2012-12-27 | Precise ring-shaped tube composite channel speaker system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577138.9A CN103096233B (en) | 2012-12-27 | 2012-12-27 | Precise ring-shaped tube composite channel speaker system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103096233A true CN103096233A (en) | 2013-05-08 |
| CN103096233B CN103096233B (en) | 2015-02-04 |
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ID=48208269
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210577138.9A Active CN103096233B (en) | 2012-12-27 | 2012-12-27 | Precise ring-shaped tube composite channel speaker system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103096233B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000125387A (en) * | 1998-10-14 | 2000-04-28 | Pioneer Electronic Corp | Speaker device |
| CN1437427A (en) * | 2002-02-08 | 2003-08-20 | 石丰山 | New-type loudspeaker system |
-
2012
- 2012-12-27 CN CN201210577138.9A patent/CN103096233B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000125387A (en) * | 1998-10-14 | 2000-04-28 | Pioneer Electronic Corp | Speaker device |
| CN1437427A (en) * | 2002-02-08 | 2003-08-20 | 石丰山 | New-type loudspeaker system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103096233B (en) | 2015-02-04 |
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