CN103024643A - Forward speaker system with precision circular-tube compound channel set - Google Patents
Forward speaker system with precision circular-tube compound channel set Download PDFInfo
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- CN103024643A CN103024643A CN2012105772095A CN201210577209A CN103024643A CN 103024643 A CN103024643 A CN 103024643A CN 2012105772095 A CN2012105772095 A CN 2012105772095A CN 201210577209 A CN201210577209 A CN 201210577209A CN 103024643 A CN103024643 A CN 103024643A
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Abstract
The invention discloses a high-performance mid-bass speaker system and particularly relates to a forward speaker system with a precision circular-tube compound channel set. A group of circular short tubes used for radiating speaker sound are disposed in front of a mid-bass cone speaker and form a compound channel, which is used to limit sound radiation environment of a vibrator and affects vibrational radiation. When the speaker operates at low frequency, the precision circular-tube compound channel is composed of a circular-tube acoustic transformer and a circular-tube acoustic quality element, wherein the circular-tube acoustic transformer consists of a group of circular regions with even sectional area, and the circular-tube acoustic quality element consists of a group of circular channels with even and constant sectional area. Total equivalent vibrational quality of the speaker is increased under the coaction of the acoustic transformer and the acoustic quality element, low-frequency resonant frequency of the speaker can be lowered, and low-frequency radiation efficiency of the speaker can be increased. The inside of the precision circular-tube compound channel is smooth and encloses the speaker in a large range, so that direct vibrational disturbance of air in a box upon the surface of the vibrator is reduced, the surface load of the vibrator is even, dynamic response speed can be increased and distortion can be decreased.
Description
Technical field:
The accurate ring pipe composite channel of forward direction of the present invention group speaker system belongs to the electroacoustic techniques field.
Background technology:
In the daily life, people are often with the loud speaker sound of resetting.The bass cone loudspeaker (comprises bass, middle bass, Squawker and full range speaker in the electrodynamic type commonly used, 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 installed in the loud speaker of working on the infinitely great baffle as reference, the loud speaker frequencies omega is described
0Etc. index.In this case, be placed in the loud speaker on the 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 mass M MR1 that shakes together 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 installed on the infinitely great baffle and use, and it is always 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 the 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, fail in casing, to exhale, 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.This surrounding enviroment are on the impact of 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 the 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 it is external according to forward to work as loud speaker, dorsad the traditional approach of radiation sound in the casing is installed on the audio amplifier of common structure and uses, can not effectively increase its total equivalent mass MM, on the contrary, its vibrating body back side be reduced with shake quality and total equivalent force CM.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 the total equivalent force CM of loud speaker reduces in the above-mentioned situation, because the air in the 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 the 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 installed in when using on the 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 installed in 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, reflected wave is to the interference of 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 dorsad unique passage of outside radiation sound of loud speaker, 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 sectional area is identical between inside and outside two pipes on the loud speaker, consist of the acoustic mass element.At this moment, on structure, " a kind of New-type loudspeaker system ", mainly be 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 the 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 the loudspeaker box, because loudspeaker vibrating body is subject to dorsad transaudient sleeve pipe and surrounds on a large scale, this has been avoided the reflective sound wave of various frequencies in the casing to comprise that standing wave directly acts on the vibrating body largely, this can improve the antijamming capability of loud speaker, and keep the dorsad uniform balance of acoustic load of loud speaker, 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 the 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 owing in most cases speaker system playback, seldom long time continuous working is in the bass state, the acoustic mass that exists in the 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.
By further being studied, " a kind of New-type loudspeaker system " find, the transaudient passage of this speaker system structurally also exists some problems, 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.
Because performance and function with " a kind of New-type loudspeaker system " of radiant transfer passage, relevant with structure and the internal environment of its acoustic radiating transmission channels, according to this principle, we in the front of loud speaker to loudspeaker design one group of passage that is used for transmitting the radiative acoustic wave of speaker cones forward direction, consist of a kind of new speaker system, for reducing the low-frequency resonant frequency of loud speaker, and promote loud speaker in, the radianting capacity of low frequency, promote the performance of loud speaker, Here it is
The accurate ring pipe composite channel of forward direction group speaker systemBut, because the sagittal environment of loud speaker is different, therefore be based upon this group radiation channel in loud speaker front, loud speaker transaudient sleeve channel structure dorsad is also different from being based upon in " a kind of New-type loudspeaker system ", and its using method and function are also variant.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of by accurate ring pipe passage group and the forward direction that loud speaker is built into together
Accurate ring pipe composite channel group speaker system, in order to reducing the low-frequency resonant frequency of loud speaker,
Bass tonequality in the improvement,Make this system have fidelity more in, low-frequency sound, improve loud speaker in, low frequency radiation-efficiency.Existing to overcome
The defective of speaker system.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The accurate ring pipe composite channel of forward direction group speaker system comprises cone loudspeaker, described cone loudspeaker involving vibrations cone and with the basin frame of radiation port, and the basin frame sidewall front end of described basin frame is with flanging; It is characterized in that: comprise that also the rear end is installed on the described flanging and the front outer tube coaxial with the vibration cone, is provided with the front inner sleeve coaxial with front outer tube in described front outer tube; Also comprise at least one intermediate casing between described front outer tube and front inner sleeve, intermediate casing is coaxial with the vibration cone; The rear end of intermediate casing is positioned at the place ahead and close this peak swing place at vibration cone peak swing place; Be connected to each other between intermediate casing, front inner sleeve and the front outer tube; Form at least bipassage ring shape passage between intermediate casing, front inner sleeve and the front outer tube.
The barriers that also comprises one section axle centered by the axes O of vibration cone, barriers is coniform or round table-like, the rear end of barriers is conical end or is the little table top of round platform, and this little table top was plane or cambered surface when the rear end of barriers was the little table top of round platform; The rear end of barriers is positioned at the place ahead at vibration cone maximum central amplitude place and near this peak swing place, the front end of barriers aligns with front inner sleeve rear end and is connected, and the outer wall of barriers is even surface; Be smooth transition between barriers and the front inner sleeve.
Crossing the section of described axes O and the intersecting lens between the front inner sleeve one side outer wall is L1, and between described section and the front outer sleeve inner wall and intersecting lens L1 the same side are L2; The intersecting lens with L1 the same side between the inwall of described section and intermediate casing and the outer wall is respectively L3, L4; L1, L2, L3, L4 are parallel to each other.
In the circular passage between the outer wall of front inner sleeve and the intermediate casing adjacent with front inner sleeve, be equipped with the circular passage and move towards consistent several block pieces, perhaps all be equipped with in each circular passage with the circular passage and move towards consistent several block pieces; Block piece is solid or is obturator, is transaudient passage between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction.
Be annular space between the intermediate casing of barriers periphery, front inner sleeve and the front outer tube; The length of annular space and described circular passage all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
Angle β between L1, L2, L3, L4 and the axes O=90 °, intermediate casing, front inner sleeve and outer tube are that annular flat is tabular.
Damping material is installed in the circular passage.
Good effect of the present invention is:
The accurate ring pipe composite channel of forward direction of the present invention group speaker system combines by the accurate ring pipe composite channel of loud speaker and one group of forward direction, constructs a kind of new speaker system, makes this loud speaker, performance boost, and function increases, and usage is flexible and changeable.
1, the ring pipe acoustic transformer element of one group of precision of structure, and create one group of accurate ring pipe composite channel.
Common acoustic transformer is one and imports and exports the different hollow container of area, ring pipe acoustic transformer in the accurate ring pipe composite channel of the forward direction of the present invention group speaker system is one group of acoustic transformer, it is to be made of the annular space between one group of adjacent internal and external casing, it is different from general acoustic transformer structure, each annular space and be attached thereto logical circular passage wherein, consist of accurate ring pipe composite channel, these accurate ring pipe composite channels consist of accurate ring pipe composite channel group together.
2, accurate ring pipe composite channel group is combined with loud speaker, be installed in the forward of loud speaker, just construct the accurate ring pipe composite channel of forward direction group speaker system, when the ring pipe passage is an acoustic mass element, the equivalent sound quality of the ring pipe acoustic mass element group in the 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 ", because distortion and energy loss that the inner brilliance of accurate ring pipe composite channel group does not have reflecting surface to cause, greatly improved the amplitude-frequency characteristic of the medium and low frequency of speaker system output, so that amplitude-frequency characteristic is 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 the accurate ring pipe composite channel of the forward direction group speaker system that forms with loud speaker by accurate ring pipe composite channel group, can further reduce the low-frequency resonant frequency of loud speaker.The annular space looping pipe acoustic transformer that common one group of the most inboard circular passage forms, the ring pipe acoustic transformer of this position can be obtained larger no-load voltage ratio easily, utilize the acoustic mass in this passage this moment, can make speaker system increase a larger equivalent sound quality, reduce the low-frequency resonant frequency of loud speaker.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 the casing, and the vibrating body surface loading is even, is beneficial to improve dynamic response speed, reduce distortion.
The particularly important is, when all internal and external casing passages are one group of parallel passages, and when the sectional area of each circular passage itself is identical, the sound wave of each circular passage internal delivery, it mainly is the sound wave that the positive front end in feeder connection place gives off corresponding to the annular vibration plane on the cone basin, when the radiation direction of annular vibration plane on the cone basin is basic when moving towards to be close with these respective annular passages, what can think each circular passage internal delivery is the plane wave that is given off by annular vibration plane, and therefore speaker system has also further improved the efficient of radiation intermediate frequency.
3, improve the formation method of acoustic mass element of other several primary structures of acoustic radiating passage, make the structural change of the accurate ring pipe composite channel of forward direction group speaker system many, 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.For so that still have the acoustic mass element in the ring pipe 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 the accurate ring pipe composite channel of the forward direction group speaker system is by even, the identical straight circular air duct of one section sectional area that forms between the adjacent internal and external casing.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 the accurate ring pipe composite channel of forward direction group speaker system, also further expand, 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 further expanded so that the inside and outside tube wall of passage is expanded to the plan position approach, become inside and outside parallel plane plectane, be round table-like ring pipe 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 forward direction of the present invention group speaker system, by in every group of sound passage, increasing the trend some group block pieces consistent with the ring pipe passage, make and be enclosure space between every group of block piece, between the two adjacent groups block piece, consist of new transaudient passage, 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 the formed annular space, can construct simply, neatly the acoustic mass element, to satisfy the requirement of reducing work frequency.Equally, when round table-like ring pipe passage becomes two passages between the plectane of plane because of the increase of the large table top of passage, between two plectanes, also can re-construct in this way the acoustic mass element.
As seen after taking these measures, expand, the perfect constituted mode of acoustic mass element in the passage, fundamentally guaranteed all the time sound mass elements existence in the passage, the effect that this has just guaranteed the reduction power resonance frequency of accurate ring pipe composite channel structure of loudspeaker system has improved in the loud speaker radiation, ability and the efficient of low-frequency sound.And it is more flexible, free that channel shape is selected, and makes its structure that widely adaptability be arranged.
4, in the ring pipe passage, increased damping material, the damping of the accurate ring pipe composite channel of flexible forward direction group speaker system
Damping situation in " a kind of New-type loudspeaker system " depends on the damping of loud speaker, the impact of sound passage and three the main aspects of air in the casing, and 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 ring pipe passage or the port of export increased damping material, in order to regulate in case of necessity the damping of the accurate ring pipe composite channel of forward direction group speaker system.
5, the accurate ring pipe composite channel of forward direction group speaker system has enlarged the function of system
Be installed in the positive externally accurate ring pipe composite channel group of radiation sound of loud speaker, can also expand the sound field of speaker playback sound, improve directive property and the ante-chamber effect of speaker system radiation sound.
Usually, the sound of loud speaker radiation is directive, and this is the so-called directivity of loudspeaker, and it is determined by design principle, structure and the characteristic of itself of loud speaker.In the accurate ring pipe composite channel of the forward direction group speaker system, the sound that the loudspeaker vibration face gives off, give off by the annular mouth of pipe, therefore, by adjusting diameter and the direction of the outlet in the ring pipe radiation channel, can change the direction of cone loudspeaker radiation sound, affect its directive property, regulate the sound field width of its radiative acoustic wave.
The ante-chamber effect usually occurs in a bit of scope in the positive taper basin front of medium and low frequency loud speaker, be installed in the barriers at inboard center in the accurate ring pipe composite channel group of the positive externally radiation sound of loud speaker, the medium and low frequency sound wave that has stopped radiation everywhere on the loud speaker taper cone face forms the approach of interference effect at ante-chamber, so can greatly improve the ante-chamber effect.
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 involving vibrations cone 1-2 and with the basin frame 1-1 of radiation port, the basin frame sidewall front end of described basin frame 1-1 is with flanging; The rear end of basin frame 1-1 is connected with circular magnet 1-3.
The present invention comprises that also the rear end is installed on the basin frame 1-1 flanging and the front outer tube 7 coaxial with vibration cone 1-2, is provided with the front inner sleeve 8 coaxial with front outer tube 7 in described front outer tube 7.
Also comprise at least one intermediate casing 12 between described front outer tube 7 and front inner sleeve 8, intermediate casing 12 is coaxial with vibration cone 1-2.The rear end of intermediate casing 12 is positioned at the place ahead and close this peak swing place at vibration cone 1-2 peak swing place.
Described intermediate casing 12, front outer tube 8 and the inner sleeve 7 of being connected pass through bracing frame connection fastened to each other.Form two-layer at least circular passage 6 between intermediate casing 12, front outer tube 8 and the front inner sleeve 7.
The cone shape barriers 9 that also comprises one section axle centered by vibration cone 1-2 axes O, barriers 9 is coniform or round table-like, the rear end of barriers 9 is conical end or is the little table top of round platform, and this little table top was plane or cambered surface when the rear end of barriers 9 was the little table top of round platform; The rear end of barriers 9 is positioned at the place ahead at vibration cone 1-2 maximum central amplitude place and near this peak swing place, the front end of barriers 9 aligns with front inner sleeve 8 rear ends and is connected, and the outer wall of barriers 9 is even surface; Be smooth transition between barriers 9 and the front inner sleeve 8.
Crossing the section of described axes O and the intersecting lens between the front inner sleeve 8 one side outer walls is L1, and the intersecting lens with L1 the same side between described section and front outer tube 7 inwalls is L2; The intersecting lens with L1 the same side between the inwall of described section and intermediate casing 12 and the outer wall is respectively L3, L4; L1, L2, L3, L4 are parallel to each other.
Angle between L1, L2, L3 and the axes O is β, the angular range of β is 0 °≤β≤90 °, when β 1＜β≤90 °, be equipped with in the circular passage 6 between the outer wall of front inner sleeve 8 and the intermediate casing 12 adjacent with front inner sleeve 8 with circular passage 6 and move towards consistent several block pieces, perhaps interior all being equipped with circular passage 6 in each circular passage 6 moved towards consistent several block pieces; Block piece is solid or is obturator, is transaudient passage between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction.Definite mode of β 1 is as follows: when β＜β 1, the second ring pipe passage 4 front and back cross-sectional areas are basically identical, and circular passage 6 can be used as the acoustic mass element substantially.
Be annular space 11 between the intermediate casing 12 of barriers 9 peripheries, front inner sleeve 8 and the front outer tube 7; The length of annular space 11 and described circular passage 6 all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
Angle β between L1, L2, L3, L4 and the axes O=90 °, intermediate casing 12, front inner sleeve 8 and outer tube 7 are that annular flat is tabular.
In the circular passage 6 damping material is installed.
The operation principle of the accurate ring pipe composite channel of forward direction forward direction group speaker system:
In the accurate ring pipe composite channel of the forward direction forward direction group speaker system, the sound wave that loudspeaker vibrating body cone forward gives off directly enters annular space and outputs to outside the passage through the port of export of ring pipe passage, therefore the air in the passage becomes the part of this speaker system, in arbitrary moment, the air in the passage becomes the most direct load of vibrating body.Because the narrow weak point of accurate ring pipe composite channel, 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 acoustic pressure raises in the sound pipe, the interior air load of pipe this moment is strengthened the reaction of loudspeaker vibrating body, and the accurate ring pipe composite channel of forward direction forward direction group speaker system has produced stronger acoustic radiation.
Because the internal and external casing of looping space and ring pipe passage all is short tube, so annular space all is 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 import and export of annular space passage is different; the cross-sectional area that the ring pipe passage is imported and exported is identical; the accurate ring pipe composite channel of the forward direction forward direction of this moment group speaker system; 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 its two ends of no-load voltage ratio change sound, be that conversion acoustic mass element acts on the mechanical impedance on the 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 make acoustic transformer with this smooth ring pipe passage, greatly reduced sound wave by its inner energy loss, so that the acoustic transformer of this structure can be done very accurately.
In the accurate ring pipe composite channel of the forward direction forward direction group speaker system, acoustic mass only just exists during in low frequency in speaker operation, in case that loud speaker breaks away from low frequency operation is interval, this acoustic mass also just disappears, and loudspeaker vibrating body still can normally be worked like a cork.
The accurate ring pipe composite channel of forward direction group speaker system that inside and outside two sleeve pipes consist of only to be arranged as example, in the accurate ring pipe composite channel of forward direction forward direction group speaker system, only has the friction loss between the interior air of passage and whole accurate ring pipe composite channel tube wall, and because annular space has identical coefficient of friction with passage, and become a common acoustic loss element R by equivalence
A2(the inner air tube motion forms with the viscous friction of tube wall).That is, improve the accurate ring pipe composite channel of this forward direction forward direction group speaker system that forms through above several respects, 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 parallel connection relation 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 the loud speaker harmony mass elements, also will further increase same the shake quality of acoustic mass equivalent action on loudspeaker vibrating body in the passage.
Be calculated as follows:
If outer tube is area is S
1Round straight tube, S simultaneously
1Effective vibrating body area when also being the loud speaker low frequency, the ring pipe passage is straight channel, area is S
2, length is for L
2Then area 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 with 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
2The time have the acoustic mass element during easier assurance passage medium and low frequency, make 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 the loudspeaker vibrating body through the annular space 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 the whole sound pipe, as long as in the 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 the accurate ring pipe composite channel of forward direction group 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 the accurate ring pipe composite channel of forward direction group speaker system
1/ S
2)
2M
A0, the total equivalent oscillating mass MM=M1+M2+MMR1+MMR2 of loud speaker when not having accurate ring sleeve, as seen, in the accurate ring pipe composite channel of the forward direction group 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. the accurate ring pipe composite channel of forward direction group speaker system, comprise cone loudspeaker (1), described cone loudspeaker (1) involving vibrations cone (1-2) and with the basin frame (1-1) of radiation port, the basin frame sidewall front end of described basin frame (1-1) is with flanging; It is characterized in that: comprise that also the rear end is installed on the described flanging and the front outer tube (7) coaxial with vibration cone (1-2), is provided with the front inner sleeve (8) coaxial with front outer tube (7) in described front outer tube (7); Also comprise at least one intermediate casing (12) that is positioned between described front outer tube (7) and the front inner sleeve (8), intermediate casing (12) is coaxial with vibration cone (1-2); The rear end of intermediate casing (12) is positioned at the place ahead and close this peak swing place at vibration cone (1-2) peak swing place; Be connected to each other between intermediate casing (12), front inner sleeve (8) and the front outer tube (7); Form at least bipassage ring shape passage (6) between intermediate casing (12), front inner sleeve (8) and the front outer tube (7).
2. the accurate ring pipe composite channel of forward direction according to claim 1 group speaker system, it is characterized in that: the barriers (9) that also comprises one section axle centered by the axes O of vibration cone (1-2), barriers (9) is coniform or round table-like, the rear end of barriers (9) is conical end or is the little table top of round platform, and this little table top was plane or cambered surface when the rear end of barriers (9) was the little table top of round platform; The rear end of barriers (9) is positioned at the place ahead at vibration cone (1-2) 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; Be smooth transition between barriers (9) and the front inner sleeve (8).
3. the accurate ring pipe composite channel of forward direction according to claim 1 and 2 group speaker system, it is characterized in that: crossing the section of described axes O and the intersecting lens between front inner sleeve (8) the one side outer walls is L1, and the intersecting lens with L1 the same side between described section and front outer tube (7) inwall is L2; The inwall of described section and intermediate casing (12) and the intersecting lens with L1 the same side between the outer wall are respectively L3, L4; L1, L2, L3, L4 are parallel to each other.
4. the accurate ring pipe composite channel of forward direction according to claim 1 and 2 group speaker system, it is characterized in that: in the circular passage (6) between the outer wall of front inner sleeve (8) and the intermediate casing (12) adjacent with front inner sleeve (8), be equipped with circular passage (6) and move towards consistent several block pieces, perhaps all be equipped with in each circular passage (6) with circular passage (6) and move towards consistent several block pieces; Block piece is solid or is obturator, is transaudient passage between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction.
5. the accurate ring pipe composite channel of forward direction according to claim 3 group speaker system, it is characterized in that: in the circular passage (6) between the outer wall of front inner sleeve (8) and the intermediate casing (12) adjacent with front inner sleeve (8), be equipped with circular passage (6) and move towards consistent several block pieces, perhaps all be equipped with in each circular passage (6) with circular passage (6) and move towards consistent several block pieces; Block piece is solid or is obturator, is transaudient passage between adjacent two block pieces, and each transaudient passage has consistent cross-sectional area along its transaudient direction.
6. the accurate ring pipe composite channel of forward direction according to claim 2 group speaker system is characterized in that: be annular space (11) between the intermediate casing (12) of barriers (9) periphery, front inner sleeve (8) and the front outer tube (7); The length of annular space (11) and described circular passage (6) all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
7. the accurate ring pipe composite channel of forward direction according to claim 3 group speaker system is characterized in that: be annular space (11) between the intermediate casing (12) of barriers (9) periphery, front inner sleeve (8) and the front outer tube (7); The length of annular space (11) and described circular passage (6) all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
8. the accurate ring pipe composite channel of forward direction according to claim 4 group speaker system is characterized in that: be annular space (11) between the intermediate casing (12) of barriers (9) periphery, front inner sleeve (8) and the front outer tube (7); The length of annular space (11) and described circular passage (6) all be less than or equal to speaker system the low-frequency resonant wave length of sound 1/10.
9. the accurate ring pipe composite channel of forward direction according to claim 3 group speaker system, it is characterized in that: the angle β between L1, L2, L3, L4 and the axes O=90 °, intermediate casing (12), front inner sleeve (8) and outer tube (7) are that annular flat is tabular.
10. the accurate ring pipe composite channel of forward direction according to claim 1 and 2 group speaker system, it is characterized in that: the circular passage is equipped with damping material in (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577209.5A CN103024643B (en) | 2012-12-27 | 2012-12-27 | Forward speaker system with precision circular-tube compound channel set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577209.5A CN103024643B (en) | 2012-12-27 | 2012-12-27 | Forward speaker system with precision circular-tube compound channel set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103024643A true CN103024643A (en) | 2013-04-03 |
| CN103024643B CN103024643B (en) | 2014-11-19 |
Family
ID=47972686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210577209.5A Active CN103024643B (en) | 2012-12-27 | 2012-12-27 | Forward speaker system with precision circular-tube compound channel set |
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| Country | Link |
|---|---|
| CN (1) | CN103024643B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110012397A (en) * | 2019-05-10 | 2019-07-12 | 美特科技(苏州)有限公司 | A kind of loudspeaker |
| PL425088A1 (en) * | 2018-03-29 | 2019-10-07 | Toroidy.Pl Transformatory L. Lachowski Spółka Komandytowa | Acoustic frequency toroidal transformer with air gap |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242557Y (en) * | 1995-07-03 | 1996-12-11 | 徐剑锋 | Double tube like loudspeaker box |
| CN1387742A (en) * | 1999-09-23 | 2002-12-25 | 蒂尔里·R·巴奇 | Longitudinally divided loudspeaker port with increased aerodynamic efficiency |
| CN1437427A (en) * | 2002-02-08 | 2003-08-20 | 石丰山 | New-type loudspeaker system |
| CN101917654A (en) * | 2010-07-26 | 2010-12-15 | 王永标 | Sounding device for producing resonance by combining container cavity |
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2012
- 2012-12-27 CN CN201210577209.5A patent/CN103024643B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242557Y (en) * | 1995-07-03 | 1996-12-11 | 徐剑锋 | Double tube like loudspeaker box |
| CN1387742A (en) * | 1999-09-23 | 2002-12-25 | 蒂尔里·R·巴奇 | Longitudinally divided loudspeaker port with increased aerodynamic efficiency |
| CN1437427A (en) * | 2002-02-08 | 2003-08-20 | 石丰山 | New-type loudspeaker system |
| CN101917654A (en) * | 2010-07-26 | 2010-12-15 | 王永标 | Sounding device for producing resonance by combining container cavity |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL425088A1 (en) * | 2018-03-29 | 2019-10-07 | Toroidy.Pl Transformatory L. Lachowski Spółka Komandytowa | Acoustic frequency toroidal transformer with air gap |
| CN110012397A (en) * | 2019-05-10 | 2019-07-12 | 美特科技(苏州)有限公司 | A kind of loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103024643B (en) | 2014-11-19 |
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