CN208158853U - Loudspeaker and its acoustic diffusers - Google Patents
Loudspeaker and its acoustic diffusers Download PDFInfo
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- CN208158853U CN208158853U CN201820557129.6U CN201820557129U CN208158853U CN 208158853 U CN208158853 U CN 208158853U CN 201820557129 U CN201820557129 U CN 201820557129U CN 208158853 U CN208158853 U CN 208158853U
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Abstract
The application proposes a kind of loudspeaker and its acoustic diffusers.Acoustic diffusers include the first diffusingsurface and the second diffusingsurface.First diffusingsurface is towards the first driver, the first central area, the first outer zone and the first indent ring region positioned at the first central area and the first outer ring section with round knuckle.Second diffusingsurface is towards the second driver, in the round disk like surface of central knuckle outward.Acoustic diffusers are to be coaxially located between the first driver and the second driver, and first driver generates different audible frequencies from second driver respectively.
Description
Technical field
The application is about loudspeaker and its acoustic diffusers, more particularly, to having high pitch monomer and bass monomer simultaneously
Loudspeaker and its acoustic diffusers.
Background technique
Acoustic diffusers are the drivers for loudspeaker, for changing the sound of various frequency ranges produced by different driving device
Transmission path, more preferably to the free field radiation sound around loudspeaker box, 360 degree of off-axis of each frequency range sound pressure level of improving the standard
And acoustic radiation efficiency.
At present with the loudspeaker of sound diffuser, it is substantially the driver of its different audio frequency range out of cooperation, separately to set
Count corresponding acoustic diffusers and exclusive spatial position of speaking.In general, the audio radiation surfaces of bass acoustic diffusers are mainly
Spherical surface, the audio radiation surfaces of high pitch acoustic diffusers are mainly pointed cone dignity, as shown in GB2459338A a case, high bass loudspeaker
The space of speaking of device is to separate design, so that high bass is spoken, there is certain distance in space.
However, when to design the loudspeaker of multiple drivers merging vannings, if each driver respectively possesses one
It speaks space, can occupy the more space of loudspeaker box, be unacceptable for loudspeaker limited for space.Cause
And, it is necessary to the shared acoustic diffusers of multiple driver are developed, and promotes speaker system simultaneously and realizes optimal acoustic characteristic.
Utility model content
In view of this, the application proposes a kind of acoustic diffusers, it to be used for loudspeaker.Acoustic diffusers are to be coaxially located at the first driving
Between device and the second driver, acoustic diffusers include the first diffusingsurface and the second diffusingsurface.First diffusingsurface drives towards first
Device, with the first central area of round knuckle, the first outer zone and positioned at the first of the first central area and the first outer ring section
Indent ring region.Second diffusingsurface is towards the second driver, in the round disk like surface of central knuckle outward.
The application more proposes an embodiment, which has the second central area of round knuckle, and first expansion
The diameter of first central area in the face of dissipating is greater than second central area of second diffusingsurface.
In one embodiment, which has concave ring surface in second, and the diameter of the concave ring surface in second is less than
The diameter of the first indent ring region of first diffusingsurface.
The application more proposes an embodiment, and it is in cone-shaped knuckle that wherein second diffusingsurface, which has the second central area,.
In one embodiment, it is in straight cone cell knuckle which, which has the second central area,.
The application more proposes an embodiment, and it is in boss cone cell knuckle that wherein second diffusingsurface, which has the second central area,.
In one embodiment, which is hollow, and first diffusingsurface has plural aperture.
In another embodiment, the inner surface of the plural number aperture of first diffusingsurface or outer surface have damping layer.
The application more proposes a kind of loudspeaker, comprising the first driver, the second driver and as each embodiment of the application mentions
Acoustic diffusers out.Second driver audible frequency is different from first driver.The acoustic diffusers include the first diffusingsurface and
Second diffusingsurface.First diffusingsurface towards the first driver, the first central area, the first outer zone with round knuckle and
Positioned at the first indent ring region of first central area and the first outer ring section.Second diffusingsurface is in towards the second driver
Entreat the round disk like surface of outside knuckle.
According to the loudspeaker and its acoustic diffusers of the application the various embodiments described above, the first driver and the second driver can be made
Space of speaking become smaller, and remain to spread the sound wave from the first driver and the second driver simultaneously.Single a acoustic diffusers
The influencing each other for its sound field of space of speaking of the first driver and the second driver can be made to minimize, and sound can be improved
Direction (such as propagating towards horizontal direction), allows loudspeaker to realize optimal acoustic characteristic.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section according to loudspeaker and its acoustic diffusers in one embodiment of the application.
Fig. 2 is the diagrammatic cross-section of Fig. 1 acoustic diffusers.
Fig. 3 A is the diagrammatic cross-section according to loudspeaker and its acoustic diffusers in another embodiment of the application.
Fig. 3 B is the diagrammatic cross-section of Fig. 3 A acoustic diffusers.
Fig. 4 A is the diagrammatic cross-section according to loudspeaker and its acoustic diffusers in the application another embodiment.
Fig. 4 B is the diagrammatic cross-section of Fig. 4 A acoustic diffusers.
Fig. 5 A is the diagrammatic cross-section according to loudspeaker and its acoustic diffusers in the another embodiment of the application.
Fig. 5 B is the diagrammatic cross-section of Fig. 5 A acoustic diffusers.
Fig. 6 be simulation drawing 2,3B, 4B and 5B acoustic diffusers frequency response curve.
Fig. 7 A is the stereo appearance figure of acoustic diffusers in another embodiment of the application.
Fig. 7 B is the three-dimensional cutaway view of acoustic diffusers in another embodiment of the application.
Fig. 8 is the frequency response curve figure for simulating (high pitch) second driver.
Fig. 9 is the frequency response curve figure for surveying (high pitch) second driver.
Specific embodiment
It reads herein for convenience, therefore "upper", "lower", "left", "right" is pointed out according to schema, the purpose is to point out each group
Reference relative position between part, rather than to limit the application.
Fig. 1 is the diagrammatic cross-section according to loudspeaker 1 and its acoustic diffusers 30 in one embodiment of the application.The application's
Loudspeaker 1 mainly includes the first driver 10, the second driver 20 and acoustic diffusers 30.First driver 10 and second drives
Dynamic device 20 is arranged coaxially to each other, and acoustic diffusers 30 are also coaxially disposed in the first upper driver 10 and the second driving under
Between device 20.
First driver 10 is set in the first hollow cavity 11, and the second driver 20 is set to the second hollow cavity
In 21, acoustic diffusers 30 then be arranged between the first cavity 11 and the second cavity 21 so that acoustic diffusers 30 coaxial arrangement in
Between the first upper driver 10 and the second driver 20 under.For convenience of description, acoustic diffusers 30 are fixed on first
Bracket between driver 10 (the first cavity 11) and the second driver 20 (the second cavity 21) is to omit not shown, this bracket
Can by can accommodate the acoustic diffusers 30 of the application and meet its sound dispersion functional requirement any structure design realized.
First driver 10 can for example realize by bass monomer (woofer), and direction of speaking is towards acoustic diffusers 30；In
In one embodiment, the first driver 10 frequency range of speaking is about 40-2,000Hz.First driver 10 has the first vibration membrane
13, the first ring 131 that have coaxial arrangement close at outer rim, that circle is prominent is prominent towards acoustic diffusers 30.
Second driver, 20 audible frequency is different from the first driver 10, and the second driver 20 for example can be by high pitch monomer
(tweeter) it realizes, direction of speaking is towards acoustic diffusers 30；In an embodiment, the second driver 20 is spoken frequency range
It is about 2,000-20,000Hz.Second driver 20 has the second vibration membrane 23, has coaxial arrangement, circle close at outer rim
The second prominent ring 231 is prominent towards acoustic diffusers 30.
Fig. 2 is the diagrammatic cross-section of Fig. 1 acoustic diffusers, please also refer to Fig. 1 and Fig. 2.First cavity 11 and the second cavity
Between 21 is the space of speaking of the first driver 10 and the second driver 20, and the acoustic diffusers 30 of the application are by this space of speaking
It is divided into two, the sound wave from the first driver 10 and the second driver 20 can be spread simultaneously, and make 10 He of the first driver
The influencing each other for its sound field of space of speaking of the two of second driver 20 minimizes, and decreases or even eliminates two sound for going out audio frequency range
The intermodulation distortion generated between.The acoustic diffusers 30 of the application are in the round disk like of the outside knuckle in center, and acoustic diffusers 30 are
It include the first diffusingsurface 31 and the second diffusingsurface 32 changing the direction of sound wave diffusion, wherein the first diffusingsurface 31 is towards the
One driver 10, the second diffusingsurface 32 is towards the second driver 20, the surface curvature of the first diffusingsurface 31 and the second diffusingsurface 32
It is not identical.
First diffusingsurface 31 has the first central area 310 of round knuckle, close to the first horizontal outer zone 312, and
The first indent ring region 311 between the first central area 310 and the first outer zone 312；First center of the first diffusingsurface 31
312 three of area 310, the first indent ring region 311 and the first outer zone, adjacent smooth excessiveness, and corresponding first driver 10
The first vibration membrane 13 be arranged coaxially to each other.First shake of the first central area 310 and the first driver 10 of the first diffusingsurface 31
The cambered surface of dynamic film 13 at least some correspond to each other.First diffusingsurface, 31 position corresponds to the first folding of the first driver 10
The greatest physical stroke position of ring 131, that is, the vertical range between the first diffusingsurface 31 and the first ring 131 is equal to or greatly
In the greatest physical stroke of the first ring 131.
Round disk like surface of second diffusingsurface 32 in the outside knuckle in center, the second central area 320 with round knuckle,
Close to the second horizontal outer zone 322, and between the second central area 320 and the second outer zone 322 second in concave ring
322 three of the second central area 320, the second indent ring region 321 and the second outer zone of 321 the second diffusingsurface of ﹔ 32 of area, adjacent
Smooth excessiveness, and the second vibration membrane 23 of corresponding second driver 20 is arranged coaxially to each other.
The sound wave (such as bass sound wave) issued by the first driver 10 towards acoustic diffusers 30, through the first vibration membrane 13 with
And the first diffusingsurface 31 of acoustic diffusers 30 change direction and to external diffusion (such as horizontally outward spread)；Similarly, by second
The sound wave (such as high pitch sound wave) that driver 20 is issued towards acoustic diffusers 30, through the second vibration membrane 13 and acoustic diffusers 30
Second diffusingsurface 32 change direction and to external diffusion (such as horizontally outward spread).
It please also refer to Fig. 1 and Fig. 2, in an embodiment, the diameter of the first indent ring region 311 of the first diffusingsurface 31
Less than or equal to the diameter of the first ring 131 of the first driver 10.In another embodiment, the second diffusion of acoustic diffusers 30
Diameter of the diameter of concave ring surface 321 less than the first indent ring region 311 of the first diffusingsurface 31 in the second of face 32.And some
In embodiment, the diameter of the first central area 310 of the first diffusingsurface 31 of acoustic diffusers 30 is greater than the second of the second diffusingsurface 32
Central area 320.
It please also refer to Fig. 3 A and Fig. 3 B, Fig. 3 A is according to the loudspeaker and its acoustic diffusers in another embodiment of the application
Diagrammatic cross-section, Fig. 3 B be Fig. 3 A acoustic diffusers diagrammatic cross-section.In addition to the above described embodiments, reach raising for the application
Sound device and its acoustic diffusers preferred acoustic characteristic performance there are also other implementations, in Fig. 3 A and Fig. 3 B, acoustic diffusers 30
First diffusingsurface 31 construction is identical as Fig. 1 and Fig. 2, the difference is that, the second diffusion of acoustic diffusers 30 in Fig. 3 A and Fig. 3 B
Second central area 320 in face 32 is the cone-shaped knuckle that inner sunken face is constituted, the second diffusingsurface other than the second central area 320
32 be close to straight surface.
It please also refer to Fig. 4 A and Fig. 4 B, Fig. 4 A is according to the loudspeaker and its acoustic diffusers in the application another embodiment
Diagrammatic cross-section, Fig. 4 B be Fig. 4 A acoustic diffusers diagrammatic cross-section.In addition to the above described embodiments, reach raising for the application
Sound device and its acoustic diffusers preferred acoustic characteristic performance there are also other implementations, in Fig. 4 A and Fig. 4 B, acoustic diffusers 30
First diffusingsurface 31 construction is identical as Fig. 1 and Fig. 2, the difference is that, the second diffusion of acoustic diffusers 30 in Fig. 4 A and Fig. 4 B
Second central area 320 in face 32 is the straight cone cell knuckle that flat surface is constituted.
It please also refer to Fig. 5 A and Fig. 5 B, Fig. 5 A is according to the loudspeaker and its acoustic diffusers in the another embodiment of the application
Diagrammatic cross-section, Fig. 5 B be Fig. 5 A acoustic diffusers diagrammatic cross-section.In addition to the above described embodiments, reach raising for the application
The performance of the preferred acoustic characteristic of sound device and its acoustic diffusers there are also other implementations, in Fig. 5 A and Fig. 5 B, acoustic diffusers 30
The first diffusingsurface 31 construction it is identical with Fig. 1 and Fig. 2, the difference is that, the second expansion of acoustic diffusers 30 in Fig. 5 A and Fig. 5 B
The second central area 320 for dissipating face 32 is the boss cone cell knuckle of the prominent surface composition of circle.
Fig. 6 is the frequency response curve of the acoustic diffusers of Fig. 2,3B, 4B and 5B, and the second driver 30 of simulation is (for example,
High-pitched driver) frequency response at the distance of 1 meter of 30 by-level position of acoustic diffusers.Wherein " ... " pecked line represents figure
Second central area 230 shown in 3B is in the acoustic diffusers 30 of pointed cone type；"-" solid line represents acoustic diffusers 30 shown in Fig. 2；" --- " is empty
It is in the acoustic diffusers 30 for straight cone cell that line, which represents the second central area 230 shown in Fig. 4 B,；And "-.- " chain-dotted line represents Fig. 5 B
Shown second central area 230 is in the acoustic diffusers 30 of boss cone cell.
It will be appreciated from fig. 6 that 4 sound pressure level curvilinear trends are of slight difference when frequency is less than 10kHz, all in 2.3kHz and
The position 5.4kHz is about 500Hz there are a paddy, the frequency bandwidth of paddy；In 10kHz-20kHz frequency range, the second center shown in Fig. 5 B
Area 230 is most flat at the sound pressure level curve of the acoustic diffusers 30 of boss cone cell.In general, the second central area 230 shown in Fig. 5 B
High pitch acoustic characteristic performance at the acoustic diffusers 30 of boss cone cell is optimal.Second diffusingsurface 32 of acoustic diffusers 30 is mainly shadow
10kHz is rung with the sound pressure level curve of super band.
Fig. 7 A and Fig. 7 B is please referred to, is the stereo appearance figure and perspective cross-sectional of acoustic diffusers in another embodiment of the application
Figure.In order to eliminate the deep valley at 2.3kHz and 5.4kHz, another embodiment of the application is it is further proposed that the sound of hollow porous type expands
Dissipate device 30.As shown in figures 7 a and 7b, acoustic diffusers 30 are hollow, the of (bass) first diffusingsurface 31 of acoustic diffusers 30
Six apertures 313a, 313b, 313c, 313d, 313f, 313e are arranged in one central area 310；In an embodiment, aperture 313a,
The equal diameter that 313b, 313c, 313d, 313f, 313e may be, for example, symmetric arrays is round.Since acoustic diffusers 30 are hollow, and
(bass) first diffusingsurface 31 of acoustic diffusers 30 the first central area 310 tool there are six aperture 313a, 313b, 313c,
313d, 313f, 313e make this acoustic diffusers 30 be equivalent to Helmholtz resonator.The wide band sound absorption of Helmholtz resonator
General relatively narrow, energy-absorbing is maximum at resonant frequency, and anti-resonance frequency sound absorbing performance reduces rapidly, and is suitble to the control of the narrowband sound transmission
System.When Helmholtz resonator size be much smaller than its resonant frequency wave length of sound, all gas particle in neck can be seen
Make " mass block ", gas is considered as one " spring " in cavity, forms a spring-quality system, i.e. classical lumped parameter mould
Type, then the mechanical model of Helmholtz resonator can be reduced to lumped mass-spring system of single-degree-of-freedom.Fig. 7 A and Fig. 7 B institute
Show this one as the acoustic diffusers 30 of Helmholtz resonator theoretical resonant frequency formula it is as follows,
Wherein c is the velocity of sound, and S is neck opening area (i.e. respective apertures 313a, 313b, 313c, 313d, 313f, 313e
Area), L be neck effective length (i.e. the depth of respective apertures 313a, 313b, 313c, 313d, 313f, 313e), V is chamber
Body volume (i.e. the hollow volumes of acoustic diffusers 30).
Acoustic diffusers 30 in Fig. 7 A and Fig. 7 B aperture 313a, 313b of (bass) the first diffusingsurface 31,313c,
The gross area of 313d, 313f, 313e will rationally cooperate the hollow volume of acoustic diffusers, aperture 313a, 313b, 313c,
The inner surface or outer surface position of the position 313d, 313f, 313e add damping layer (not identifying in figure).Damping layer can by
The Shang Fen Do of aperture 313a, 313b, 313c, 313d, 313f, 313e is arranged screen cloth and realizes, the screen cloth as damping layer is covering
Inner surface or outer surface in aperture 313a, 313b, 313c, 313d, 313f, 313e.The damping size of damping layer is adjusted,
It can be by adjusting the percent opening and adjustment aperture 313a, 313b, 313c, 313d, 313f, 313e of the screen cloth as damping layer
Size and realize, so i.e. can be designed suitable resonant frequency and the Helmholtz resonator with damping as acoustic diffusers
30。
The acoustic diffusers 30 of Fig. 1 are replaced to carry out simulation test the Porous hollow acoustic diffusers 30 in Fig. 7 A and Fig. 7 B, i.e.,
Comparable (high pitch) the second driver 20 is having the frequency sound at hole and non-porous 30 by-level position 1m distance of acoustic diffusers
It answers, as shown in Figure 8 and Figure 9.Fig. 8 is the frequency response curve figure for simulating (high pitch) second driver 20, and wherein "-" solid line represents figure
The Porous hollow acoustic diffusers 30 with damping layer in 7A and Fig. 7 B；And " --- " dotted line represents the non-porous acoustic diffusers of Fig. 1
30.Fig. 9 is the frequency response curve figure for surveying (high pitch) second driver 20, and wherein "-" solid line represents the band resistance in Fig. 7 A and Fig. 7 B
The Porous hollow acoustic diffusers 30 of Buddhist nun's layer；And " --- " dotted line represents the non-porous acoustic diffusers 30 of Fig. 1.
By the sound pressure level curve of Fig. 8 simulation it is found that the Porous hollow acoustic diffusers with damping layer can be eliminated effectively
The deep valley of 2.3kHz improves deep valley at the position 5.4kHz, keeps sound pressure level curve gentler, be conducive to the sound diffusion of loudspeaker 1
Device 30 designs.According to Fig. 9 measured curve it is found that measured result is almost the same with analog result.Further analysis shows that 2.3kHz
Result after the sound field in space couples at 30 outer diameter of acoustic diffusers the reason is that high bass is spoken with the deep valley at 5.4kHz.In sound
Aperture 313a, 313b, 313c, 313d, 313f, 313e is arranged in (bass) the first diffusingsurface 31 of diffuser 30, adds damping layer,
Make acoustic diffusers 30 become the Helmholtz resonator with damping layer, change (bass) first driver 10 speak space sound pass
Defeated path then eliminates the deep valley at 2.3kHz and improves the deep valley of the position 5.4kHz.It is worth noting that, acoustic diffusers 30
Damping control at the position aperture 313a, 313b, 313c, 313d, 313f, 313e of first diffusingsurface 31 is of crucial importance, damping
It is excessive or it is too small cannot all reach Optimal Control effect, damp excessive, be equivalent to (bass) first diffusingsurface of acoustic diffusers 30
31 be rigidity, and sound not can enter in acoustic diffusers 30；It damps too small, radiates acoustic pressure in acoustic diffusers 30 largely anti-spoke
Be emitted back towards in original sound field, cannot occur effectively to couple, optimum efficiency is not achieved, thus to reasonably adjust aperture 313a, 313b,
Damping at the position 313c, 313d, 313f, 313e obtains optimal effect.
According to the loudspeaker 1 and its acoustic diffusers 30 of the above-mentioned a embodiment of the application, it can spread and be driven from first simultaneously
The sound wave of dynamic device 10 and the second driver 20, and make the two of the first driver 10 and the second driver 20 to speak its sound field of space
Influence each other and minimize, allow loudspeaker 1 to realize optimal acoustic characteristic.
Although the application is disclosed as above with embodiment, so it is not limited to this case, any skilled person,
It does not depart from spirit and scope, when can make some changes and embellishment, therefore the protection scope of the application is attached after view
The range that is defined of claims subject to.
Claims (10)
1. a kind of acoustic diffusers are used for loudspeaker, which is characterized in that include：
First diffusingsurface, towards the first driver, the first central area, the first outer zone with round knuckle and be located at should
First indent ring region of the first central area and the first outer ring section；And
Second diffusingsurface, towards the second driver, in the round disk like surface of central knuckle outward；
Wherein, the acoustic diffusers be coaxially located between first driver and second driver, and first driver with
Second driver generates different audible frequencies respectively.
2. acoustic diffusers as described in claim 1, it is characterised in that：
First driver includes the first ring, and the vertical range between first diffusingsurface and first ring is equal to or more than
The greatest physical stroke of first ring.
3. acoustic diffusers as claimed in claim 2, it is characterised in that：
It is in round knuckle that second diffusingsurface, which has the second central area, and the diameter of first central area of first diffusingsurface is big
In second central area of second diffusingsurface.
4. acoustic diffusers as claimed in claim 3, it is characterised in that：
Second diffusingsurface has a concave ring surface in second, and the diameter of the concave ring surface in second be less than first diffusingsurface this
The diameter of one indent ring region.
5. acoustic diffusers as claimed in claim 2, it is characterised in that：
It is in cone-shaped knuckle that second diffusingsurface, which has the second central area,.
6. acoustic diffusers as claimed in claim 2, it is characterised in that：
It is in straight cone cell knuckle that second diffusingsurface, which has the second central area,.
7. acoustic diffusers as claimed in claim 2, it is characterised in that：
It is in boss cone cell knuckle that second diffusingsurface, which has the second central area,.
8. acoustic diffusers as claimed in claim 2, it is characterised in that：The acoustic diffusers are hollow, and the first diffusion mask
There is plural aperture.
9. acoustic diffusers as claimed in claim 8, it is characterised in that：The inner surface of the plural number aperture of first diffusingsurface or
Outer surface has damping layer.
10. a kind of loudspeaker, which is characterized in that include：
First driver；
Second driver, audible frequency are different from first driver；And
Any acoustic diffusers such as claims 1-9.
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| CN201820557129.6U CN208158853U (en) | 2018-04-19 | 2018-04-19 | Loudspeaker and its acoustic diffusers |
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| CN201820557129.6U CN208158853U (en) | 2018-04-19 | 2018-04-19 | Loudspeaker and its acoustic diffusers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110392323A (en) * | 2018-04-19 | 2019-10-29 | 惠州迪芬尼声学科技股份有限公司 | Loudspeaker and its acoustic diffusers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110392323A (en) * | 2018-04-19 | 2019-10-29 | 惠州迪芬尼声学科技股份有限公司 | Loudspeaker and its acoustic diffusers |
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Address after: 516223 Difeni Industrial Zone, Xinlian Village, Xinwei Town, Huiyang District, Huizhou City, Guangdong Province Patentee after: Huizhou Difenni Acoustics Technology Co., Ltd. Address before: 516223 Difeni Industrial Zone, Xinlian Village, Xinwei Town, Huiyang District, Huizhou City, Guangdong Province Patentee before: Huizhou Ultrasonic Audio Co., Ltd. |