CN100413379C - Direct coupling of waveguide to compression driver having matching slot shaped throats - Google Patents
Direct coupling of waveguide to compression driver having matching slot shaped throats Download PDFInfo
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- CN100413379C CN100413379C CNB008200319A CN00820031A CN100413379C CN 100413379 C CN100413379 C CN 100413379C CN B008200319 A CNB008200319 A CN B008200319A CN 00820031 A CN00820031 A CN 00820031A CN 100413379 C CN100413379 C CN 100413379C
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- 230000006835 compression Effects 0.000 title abstract description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
Abstract
The present invention relates to a compression driver with phase control and compressed inserting components, which can be directly connected to inlet throats with non-unit aspect ratio such as acoustic waveguide of rectangular diffraction grooves. A phase control and compressed inserting component is provided with an input end part with an input surface of a plurality of input holes which are arranged in parallel and form a separating string-shaped groove. The output end part of the back of the inserting component is provided with a plurality of similar output holes. The latter is arranged in an output region with unequal long and wide sizes, so the area of the output region is smaller than the area of the input region. A plurality of channels connect all input holes and corresponding output holes through the main body of the inserting component, wherein the corresponding length of the channels is preselected in order to provide concave acoustic wavefront on a long (vertical) shaft and plane or convex acoustic wavefront on a short (horizontal) shaft. The phase control and compressed inserting component of the present invention generates wave front edge transition from circular shape to the shape with non-unit aspect ratio, so a driver throat part can be directly connected to the acoustic waveguide with the throat part in the shape of the non-unit aspect ratio. Thereby, the need of a circular-rectangular transitional coupling part and the need of the waveguide of inner diffraction grooves or speakers is eliminated, and the factors are favorable to the accurate transmission of the wavefront which extends in a cylindrical shape from a waveguide opening and a waveguide mouth array.
Description
Technical field
The present invention relates to electro-acoustic transducer, and relate in particular to the electro-acoustic transducer that is commonly referred to the compressed drive type, they are used for being connected with loudspeaker horn, waveguide or directed acoustic baffle.
Background technology
Compressed drive is equipped with diaphragm traditionally, and these diaphragms have spherical section radiating surface zone A
In, it is consistent with the sphere input face of phased/packed card (acoustics converter or equalizer).Produce acoustic pressure is imported into seam or well format by a plurality of passages on the sphere input face of packed card entry pore by motion of membrane, these passages are derived from outlet by the packed card main body, the outlet concentrated area is included in the annular output area, and this output area is called as throat region A
Out, it in the driver front towards loudspeaker setting, wherein A
OutLess than A
In
Fig. 1 to 3 is illustrated in the packed card 250a of the various prior aries of using in traditional round larynx shape compressed drive (not shown), 250b, 250c.As shown in the figure, the input hole is made up of distribution hole, locked groove, radial slot and combination thereof usually.The feasible air compression that is moved by diaphragm of this packed card reaches in the phased coupling part, plane of the circular throat of driver and derives.Fig. 1 represents to be arranged to the input hole of locked groove; Fig. 2 represents to be arranged to the input hole of radial slot; And Fig. 3 represent to be arranged to distribute input hole in hole.In each figure, on the dashed circle 251 expression diagram packed card distally position of compressed drive circle throat.
The packed card of high frequency driver designs than about 10: 1 with the acoustic pressure of selecting usually, and the distance between the entry pore is enough little, so that also can remain on the single phase relation of formation plane wave in the round throat of driver front up to required highest frequency.This is to stem from, and the paper that A.G.Webster used various cone angle equations to describe the Mathematical Modeling of loudspeaker acoustic characteristic in 1919 is based on the hypothesis of zero curvature.Therefore, current main models produces plane wave in the throat of compressed drive, it is coupled to the loudspeaker horn with equal diameter circle input throat, and in this model, propagates by loudspeaker and can not leave as the non-plane wave of dispersing at the horn mouth place at the plane wave of driver throat.
Loudspeaker horn and waveguide with not contour non-circular throat to wide size (non-unit aspect ratio) are known as rectangle usually.As shown in Figure 4, for example the loudspeaker 200 of multi-cavity have the throat 201 of rectangle usually, and intermediate sound coupler 210 of its needs provides from the round throat of compressed drive (not shown) and imports the transition of the circle of throat 201 to rectangle (unit is to non-unit) to the rectangle of loudspeaker.
Horizontal pack for fear of voice output on the high frequency of drive operation scope, the rectangle input throat of loudspeaker is launched into diffraction groove, therefore, as used herein, diffraction groove is defined as having non-unit (non-unity) the acoustics diffraction hole of (high/wide) ratio in length and breadth.This diffraction groove is typically but differs and is decided to be rectangle and according to regulation of the present invention, it must be littler than the area of radiation diaphragm.
Summary of the invention
The object of the present invention is to provide:
1) the fan linear array of large scale, the output of high power sound, multiple unit, coupling horizontal waveguide, it is the radiative acoustic wave wavefront on the waveguide mouth, as the stripline radiator that uses coupled waveguide, promptly have straight phase contour, also have cylindrical wave before.
2) satisfy the compressed drive and the waveguide of unit needs,, can disobey a square reciprocity law thus, can reach between spherical and cylindrical radiation in theory near 3dB so that the cylindrical array of waveguide mouth is collectively propagated acoustic energy.
3) have the compressed drive of groove throat, it produces recessed isopen with by duct propagation and directly export from the waveguide mouth along the major axis of groove.
4) such phased plug-in unit, its produces along the recessed isopen of the major axis of output and along the straight or protruding slightly wavefront of diffraction minor axis.
5) the spherical input face of phased plug-in unit has the hole of parallel array string shape groove.
6) has the compressed drive of flute profile throat.
7) compressed drive, it can directly be coupled in its throat has on the loudspeaker horn or waveguide of diffraction groove.
8) have the waveguide of diffraction groove throat, its installation of driver does not need with middle acoustic coupler and need not use inner diffraction groove in waveguide.
9) high output, cylindrical speaker system, it comprises coupled waveguide mouth array and and its corresponding driving device.
10) large tracts of land, high output, planar radiation speaker system, it disobeys a square reciprocity law, can reach in theory very near 6dB.
11) array speaker apparatus, it is with promptly minimum the offseting property of sound of largest global, extremely ring and utmost point radiation acoustic energy clearly.
12) array speaker apparatus wherein reaches territory, far field radiation condition on each unit waveguide mouth and driver.
13) array speaker apparatus, it has appropriate interface and control and is used for the signal processing of wave beam variable position.
By following description of this invention purpose that will be appreciated that other and that be correlated with.
Summary of the invention
The present invention generally relate to a kind of phased/packed card and it is had the direct connection of the sound wave output of the waveguide of groove shape throat or loudspeaker.This plug-in unit has input or main end, this end has the surface consistent and separated with radiation diaphragm profile phase and has a plurality of entry pores that are preferably groove, they are arranged to parallel array with the interval that increases, and it has a plurality of similarly output array of apertures parallel and arranged side by side in the inferior end of plug main body, their are the common output hole that forms in a zone, and this zone has unequal length and width size and area thereof the area less than input face.A plurality of passages in plug main body are connected to corresponding output hole with each interarea input hole.The relative length of passage is by preselected, obtains narrow vertical scattering with the acoustic wavefront that is provided at spill on its long (vertically) axle, and is provided at its acoustic wavefront of lacking plane on (level) axle or convex and comes by the wide horizontal dispersion of diffraction realization.
Phased packed card of the present invention is with the wavefront border transition of new function generation from circle to non-unit aspect ratio shape of plug-in unit, so that driver throat can be directly connected on the acoustical waveguide or loudspeaker with matching slot throat, eliminated the transition coupling unit thus and had the needs of the loudspeaker of inner diffraction groove.
Particularly, the invention provides be used in the electro-acoustic transducer or and the phased and packed card that uses together of electro-acoustic transducer, this electro-acoustic transducer has the spherical diaphragm that is suitable for producing high frequency, wherein said phased and packed card is the main body that has input end and output end by, and it is A that the input end has area
InWith having area with corresponding to input face of the shape of described spherical diaphragm and output end is A
OutOutput area, A wherein
In＞A
Out, output area has the non-unit aspect ratio of major axis and minor axis, a plurality of input holes on the input face of main body input and be included in a plurality of corresponding output hole in the output area on the main body output end; It is characterized in that phased and packed card also comprises: by a plurality of passages of main body, described a plurality of passage is provided with three or more string shape grooves, these string shape grooves are arranged and are formed on separatedly on the input face of main body input abreast, each passage connect in a plurality of input holes each and corresponding one output hole, and from the input hole to output hole its cross section along with expansion, wherein pass each passage and along the distance (D of the axis of the major axis that is parallel to described output area from each described input hole
1, D
2) equate that with the wavefront of straight acoustics that the major axis that crosses output area is provided and wherein, the same distance of passing passage is unequal in the side that propagates, to produce along the recessed wavefront of the major axis of output area.
In first aspect, the present invention will as be used in the electro-acoustic transducer or and the phased and packed card that uses together of electro-acoustic transducer, this plug-in unit comprises: the main body with input end and output end, it is A that the input end has area
InInput face and to have area be A in the output end
OutOutput area, A wherein
In＞A
OutAs a plurality of input holes of setting of string shape groove and substantially parallel layout, they constitute on the input face of main body input separatedly; Be included in a plurality of corresponding output hole in the output area on the main body output end; Reach a plurality of passages by main body, each passage connects and a corresponding output hole in a plurality of input holes, and from importing hole to exporting its cross section of hole along with expansion.
In second aspect, the present invention will as be used in the electro-acoustic transducer or and the phased and packed card that uses together of electro-acoustic transducer, this plug-in unit comprises: the main body with input end and output end, it is A that the input end has area
InInput face and to have area be A in the output end
OutOutput area, A wherein
In＞A
Out, output area has non-unit aspect ratio; A plurality of input holes on the input face of main body input; Be included in a plurality of corresponding output hole in the output area on the main body output end; And a plurality of passages by main body, each passage connects each and the corresponding output hole in a plurality of input holes, and from the input hole to its cross section of output hole along with expansion.
In the third aspect, the present invention will have the diaphragm of circular contour vibration plane as the phased and packed card that is used in the electro-acoustic transducer, and this plug-in unit comprises: one has area is A
InThe input end of input face, this input end is consistent with the profile phase of described vibration plane; Having area is A
OutThe output end of output area, A wherein
In＞A
Out, output area has the non-unit aspect ratio of major axis and minor axis; As a plurality of input holes of setting of string shape groove and substantially parallel layout, they constitute on the input face of described input separatedly; Be included in a plurality of corresponding output hole in the output area on the described plug-in unit output end; And a plurality of passages, each passage extends to corresponding output hole from each of the above input hole of described input face, and enlarges in its cross section on the direction of described output hole.
In fourth aspect, the present invention will be as the compressed drive with phased and packed card, and it is A that this plug-in unit has having area
InThe input end of input face on a plurality of input holes and have a plurality of passages, these passages are directed to that to have area be A
OutThe output area of non-unit aspect ratio in the output end on a plurality of output holes, A wherein
In＞A
Out, this compressed drive has one by throat phased and that the packed card output area comes out continuously, and comprise with described compressed drive be installed to have the coupling throat waveguide on device.
Description of drawings
Fig. 1 is the figure of the spherical input face on the membrane ends of packed card of prior art, and wherein entry pore is arranged to locked groove;
Fig. 2 is the figure of the spherical input face on the membrane ends of compressed drive of prior art, and wherein entry pore is arranged to radial slot;
Fig. 3 is the figure of the spherical input face on the membrane ends of packed card of prior art, and wherein entry pore is arranged to the hole that distributes;
Fig. 4 is the perspective view of prior art loudspeaker horn 200, and these loudspeaker have rectangle throat 201 and have the transition coupler 210 of band circle throat 211, can traditional round larynx compressed drive (not shown) be installed to loudspeaker 200 in this circle throat;
Fig. 5 is the plane graph of the spherical input face on the membrane ends of first compressed drive (for clarity sake having removed lid and diaphragm) with first preferably phased/packed card, and the spherical input face on the membrane ends of this phased/packed card can be in sight at the center;
Fig. 5 A is the plane graph of the spherical input face on the membrane ends of the first modification compressed drive, and this driver uses the plug-in unit 14A with parallel chords groove 50, wherein the 46A of rectangle throat of compressed drive and groove orientation abreast; And
Fig. 5 B is the plane graph of the spherical input face on the membrane ends of the second modification compressed drive, and this driver uses the plug-in unit 14B with parallel chords groove 50, and wherein compressed drive has the circular 46B of throat;
Fig. 6 be can be descried among driver reverse side throat end and Fig. 5 at the center output area of phased/packed card;
Fig. 7 is the sectional view along Fig. 5 center line 7-7;
Fig. 8 is the sectional view along Fig. 6 center line 8-8;
Fig. 9 is the perspective view that is connected to the compressed drive 10 of loudspeaker horn mounting flange of the present invention;
Figure 10 is the perspective view with modification loudspeaker horn of the construction bolt that is connected to compressed drive;
Figure 11 is the plane graph of the second compressed drive rear end;
Figure 12 is the figure along the line 12-12 ' of Figure 11;
Figure 13 is the plane graph of the 3rd compressed drive (for clarity sake having removed lid or diaphragm), and wherein have at the center can descried concave curvature for the spherical input face of the 3rd preferably phased/packed card;
Figure 14 is the figure along the line 14-14 ' of Figure 13;
Figure 15 is the figure of driver shown in Fig. 5-8, wherein removes phased packed card and receives the groove 15 of described plug-in unit with expression, and dot input face zone A
InAnd output area A
Out
Embodiment
Fig. 5-8 and 15 expressions, the first preferred compressed driver 10, it comprises first preferably phased/packed card 14 (for the purpose of concise and to the point, hereinafter referred to as " plug-in unit ").
As shown in the figure, this concrete compressed drive 10 by the permanent magnet 28 of plug-in unit 14 and the diaphragm 30 that has whole voice coil loudspeaker voice coil 36, annular array with corresponding utmost point spare 13,20 and cover 18 and combine.
Also as representing among the figure that plug-in unit 14 generally includes the main body (not label) with input end 12 and output end 46.It is A that the input end can be regarded as area
InInput face 12, and output end 46 can be regarded as less area A
OutOutput area 46.
Fig. 5 represents not to be with the back side of the compressed drive 10 of its lid 18 or diaphragm 30, so that expose the input face 12 of plug-in unit 14.
Fig. 6 represents the front 54 of compressed drive 10, and it comprises its throat that partly is made of the output area 46 of plug-in unit 14 (label) separately.
As the clearest expression of Fig. 7, lid 18 and outer utmost point spare 20 are combined into a cylindrical shell 16.Particularly, lid 18 has a ring flange 22, and it is fixed on the outer utmost point spare 20 by the screw (not shown) is installed, and screw is installed is received in the screwed hole 26 of outer utmost point spare 20.Outer utmost point spare 20 supportings are around the annular array of the permanent magnet 28 of interior utmost point spare 13.
In the arc conical socket 15 of utmost point spare 13, the input face 12 of plug-in unit was consistent with the inner face of diaphragm 30 in plug-in unit 14 was received in.Here, diaphragm 30 and input face 12 have spherical surface, but also may be other geometry.
Diaphragm 30 has annular flange 32, and this flange is received in and covers between 18 ring flange 22 and the outer utmost point spare 20.In fact, diaphragm 30 is made by sheet metal or fibre composites, its thickness from be used for high frequency driver about 0.002 inch to being used for about 0.02 inch of intermediate frequency driver.
The annular flange 32 of diaphragm 30 has the annular acoustic compliance part 34 and the cylindrical voice coil loudspeaker voice coil 36 of annular, and the latter extends near the acoustic compliance part 34 from diaphragm 30.In the annularair gap 38 in voice coil loudspeaker voice coil 36 extend between utmost point spare 13 and the outer utmost point spare 20, so that will cause the corresponding mobile of diaphragm by the drive current of voice coil loudspeaker voice coil 36.
In this embodiment, interior utmost point spare 13 is provided with a plane surface 40, and the loudspeaker ring flange is installed thereon.
Fig. 7 is a sectional view along the compressed drive 10 of Fig. 5 Vertical Centre Line 7-7.Here, express and cover 18 and diaphragm 30 and can find out diaphragm 30 and the spherical characteristic of plug-in unit input face 12.
By can understand the interior layout of plug-in unit 14 simultaneously best with reference to Fig. 5-8 and 15.These figure collective faces of land are shown in a plurality of input holes 50 on the spherical input face 12 of plug-in unit, and input hole 50 leads to a plurality of corresponding passages 58, and these passages extend to plug-in unit output area 46.
Preferred input hole 50 is set near parallel array spaced apart, string shape groove 50.When a frequency relevant with diaphragm diameter and material was above, the piston characteristic stopped and the surf zone of circular iris is tending towards in radial separation and produce the resonance of concentric manner.Parallel string shape groove helps anyization of resonant acoustic wave output of diaphragm modal vibration, to produce the level and smooth response of resonant frequency range.
Shown in Fig. 5 A and 5B, can have a plurality of other plug-in unit configurations of parallel chords shape groove.For example in Fig. 5 A, on the plug-in unit that parallel chords shape groove 50 uses in being suitable for use in the compressed drive with the 46A of rectangle throat, this rectangle throat and groove are directed abreast, but not as the vertical orientation among Fig. 5.In Fig. 5 B, on the plug-in unit that parallel chords shape groove 50 uses in being suitable for use in the compressed drive with circular 46B of throat.
Get back to the embodiment of Fig. 5-8, can be well understood to the passage 58 that connects input hole 50 and corresponding output hole 48 with reference to Fig. 7 and 8.As shown in Figure 7, each passage 58 has converging sidewalls 60 and 62, and as shown in Figure 8, each passage 58 has the roof of dispersing and diapire 64 and 66.Therefore, on the direction of propagation, passage 58 is assembled to output area 46 along an axle (see figure 7), and always spreads to output hole 48 from input hole 50 in the axle transverse cross-sectional area.
Fig. 5 represents to import hole 50 relative output area 46 (dotted line) vertical orientations.Under this vertical situation, the output hole in output area has than little width of described groove and the height bigger than described groove.Other orientation also is possible.For example, input hole 50 relative output area 46A also can have parallel orientation, as shown in Fig. 5 A.Under parallel situation, the output hole in output area has than the big width of described elongated slot and than the described little height of elongated slot.
The profile of passage 58 and size will design according to the requirement of the desired properties of compressed drive 10 and respective waveguide or loudspeaker.
In a preferred plug-in unit 14, the area of each input hole 50 its ratio of exporting the area of hole 48 separately relatively is preferably steady state value, so that provide identical diffusivity by each passage 58.
As shown in Figure 7, the length " D of sidewall 60,62
1" preferably be equal to or less than from the summit 68 of input face 12 to the axial distance " D of the respective point of output area 46
2".Dimensional parameters adjusts a wavefront 72, and this wavefront is flat or more protruding on the minor axis of output area 46.
As shown in Figure 8, the distance by passage 58 on the direction of propagation is preferably unequal, and the distance by middle passage 74 is greater than the distance of the passage 58 by being positioned at the side.Produced along the recessed wavefront 72 of output area 46 major axis with the spatial relationship of spherical diaphragm.
Therefore, to the preferably such sizing of plug-in unit passage 58, so that produce a wavefront 72, this wavefront is being recessed on the major axis of output area 46 and is being straight or protruding on its minor axis.When driver 10 is connected on the loudspeaker with suitable dimension of suitably dispersing roof and diapire, on its propagation characteristic, meet the requirements at the wavefront 72 of the major axis fovea superior of driver output area 46.Especially, recessed wavefront 72 will be propagated to reach and leave horn mouth with straight basically wavefront vertical axis by these loudspeaker.The result is that the wavefront of cylindrical diffusion penetrates from horn mouth, its comparable traditional round larynx driver that is connected to the equivalent dimension loudspeaker provide may higher height pattern wavefront.The combination of prior art does not form the protruding spheric wave front of distortion with not meeting the requirements at the horn mouth place, and protruding wavefront is intrinsic dispersing.
Preferred plug-in unit 14 has strides rib 52 in input hole 50, so that they form integral body with plug-in unit 14, and plug-in unit 14 manufactured reaching are installed in the assembly as a whole.
The throat of driver must finally be connected in the throat of loudspeaker.Driver is provided with circular throat and this driver traditionally can be directly connected on the loudspeaker with circular throat (but transition or do not carry out the transition to another in-profile), or is connected on the loudspeaker with rectangle throat by the transition male part with circle-rectangular configuration or throat's annex indirectly.
Fig. 6 is illustrated on the front portion 54 of compressed drive 10 and comprises the output area 46 that exports hole 48.This preferred output area 46 has the height (h) bigger than width (w), makes it have major axis 46h and minor axis 46w.In other words, this output area 46 is different with circle or square region with the known type that equals 1 aspect ratio, and it has non-unit aspect ratio.
The minor axis of output area 46 preferably be not more than diaphragm 30 circular vibration plane diameter 33%, most preferably be 25% for high frequency compression drivers.The major axis of output area 46 preferably be not less than diaphragm 30 circular vibration plane diameter 75%.
Fig. 6 represents to have the output area 46 of the rectangular shape of the groove shape throat loudspeaker that can be directly connected to coupling.But, this configuration of the present invention can be had non-unit aspect ratio any output area, satisfy as oval, the polygon of elongation or the output area of any other elongated shape.
Fig. 9 represents first compressed drive 10, it be connected directly one have wide disperse sidewall 78 and 80 and the loudspeaker horn 76 of the roof dispersed a little and diapire 82 and 84 on.As same typical new-type loudspeaker, these loudspeaker 76 have a rectangle throat 86, and this throat expands to rectangular horn mouth 88.Though be rectangle, these loudspeaker 76 have the mounting flange 90 of a circle, are used to be connected to the front portion 54 of compressed drive 10.In Fig. 9, loudspeaker 76 usefulness screws 42 are installed on the driver front portion 54, and the corresponding screw hole 43 (as shown in Figure 7) in the plane surface 40 of these screws 42 and interior utmost point spare 13 is connected.
When driver 10 was installed on the loudspeaker 76, driver flute profile throat (mainly being determined by the output area 46 of plug-in unit 14) was aligned in the loudspeaker flute profile throat 86 and and directly acoustics coupling of this throat.Therefore, driver 10 directly can be coupled on the loudspeaker with rectangle throat 86 now, this throat is enough narrow so that serve as a diffraction groove job.This does not just advantageously need to be provided with independent transition coupler as shown in Figure 4, or inner circular-rectangle transition portion is set in loudspeaker.
Figure 10 represents the loudspeaker of a modification, and it has around throat 86 and supports the outside installed surface 94 of a plurality of bolts 96, it be connected to or be connected with hole that driver 10 forms in the whole suitable stationary support.The number could varyization of bolt 96, but be preferably four.
Figure 11 and 12 expressions comprise the second preferred compressed driver 96 of the second preferred plug-in unit 95, and it is suitable as loudspeaker or the waveguide that intermediate frequency range is used.Figure 11 represents the back side of driver 96.Figure 12 is a cross section along the driver 96 of Figure 11 center line 12-12 ' intercepting.
The second preferred driver 96 comprises 108, one voice coil loudspeaker voice coils of a diaphragm (not label) except that plug-in unit 95, an annular magnet 98 and relevant utmost point spare 100,102 and lid (not label).
Plug-in unit 95 generally includes a main body (not label) with input 118 and output 120.As first embodiment, the input end can be regarded as regional A
InInput face 118, and output the end can be regarded as less area A
OutOutput area 120.
As clearly expression among Figure 12, diaphragm 108 has an annular shirt rim 114 and an arch core 116.This core 116 is represented as convex, but also can be spill.Annular magnet 98 and interior and outer utmost point spare 102,104 contacts, and these utmost point spares form annularair gap 104.The voice coil loudspeaker voice coil of diaphragm extends in this air gap 104 and electrical lead extends to terminal 110 on the framework 112 of driver 96 from voice coil loudspeaker voice coil, so that suitably be connected on the amplifier.
The profile of diaphragm 108 is consistent with plug-in unit input face 118.Plug-in unit 95 is included in a plurality of input holes 126 on its input face 118, and input hole 126 leads to corresponding a plurality of passage 124, and these passages expand to a plurality of output holes 120 in the output area 128.Described with reference to the driver 10 shown in Fig. 5-8 as the front, output area 128 is again as driver throat.
Figure 13 and 14 expressions comprise the 3rd preferred compressed driver 128 of the 3rd plug-in unit 130, and it is suitable for wide angle and uses.Figure 14 is a cross section along the driver 128 of Figure 13 center line 13-13 ' intercepting.
The 3rd preferred driver 128 comprises 146, one voice coil loudspeaker voice coils of a diaphragm (not label) except that plug-in unit 130, the cylindrical-array 136 of a magnet and relevant utmost point spare 138,140 and lid (not label).
Plug-in unit 130 generally includes a main body (not label) with input 134 and output 168.As two embodiment, the input end can be regarded as area A
InInput face 134, and output the end can be regarded as small size A
OutOutput area 168.
As clearly expression among Figure 14, the cylindrical-array 136 of magnet and interior and outer utmost point spare 138,140 contacts, these utmost point spares form annularair gap 142.The voice coil loudspeaker voice coil of diaphragm is arranged in this air gap.Diaphragm 146 also comprises an annular acoustic compliance part 154 and a periphery 148, and the latter is fixed between the annular flange dish 152 of outer utmost point spare 140 and the ring 150, and this ring has the securing member 144 that is sitting in the screw hole (not shown).
Plug-in unit 130 has an annular flange dish 156.Plug-in unit 130 is sitting in the conical socket 160, contacts with interior utmost point spare 138 with its annular flange dish 156.The plug-in unit input face comprises input hole 158, these hole introduction channels 160, and the latter is led to the output hole 162 that is included in the output area 168.
It is to be that the 3rd preferred plug-in unit 130 is suitable for the application of wide angle: it has a recessed input face 134, and this input face will produce the wavefront protruding or that disperse along the main shaft of output area 168.
Below with reference to illustrated and currently preferred embodiments the present invention is made description.But do not wish that the present invention is limited by the disclosure of preferred embodiment too.And wish that the present invention is determined by device that proposes in following claims and their part that is equal to.
Claims (17)
1. be used in the electro-acoustic transducer or and the phased and packed card that uses together of electro-acoustic transducer, this electro-acoustic transducer has the spherical diaphragm that is suitable for producing high frequency, wherein said phased and packed card is the main body that has input end and output end by, and it is A that the input end has area
InWith having area with corresponding to input face of the shape of described spherical diaphragm and output end is A
OutOutput area, A wherein
In＞A
Out, output area has the non-unit aspect ratio of major axis and minor axis, a plurality of input holes on the input face of main body input and
Be included in a plurality of corresponding output hole in the output area on the main body output end; It is characterized in that phased and packed card also comprises:
A plurality of passages by main body, described a plurality of passage is provided with three or more string shape grooves, these string shape grooves are arranged and are formed on separatedly on the input face of main body input abreast, each passage connect in a plurality of input holes each and corresponding one output hole, and from importing hole to exporting its cross section of hole along with expansion
Wherein pass each passage and along the distance (D of the axis of the major axis that is parallel to described output area from each described input hole
1, D
2) equate, with the wavefront of straight acoustics that the major axis that crosses output area is provided and
Wherein, the same distance of passing passage is unequal in the side that propagates, to produce along the recessed wavefront of the major axis of output area.
2. according to the phased and packed card of claim 1, wherein output area is a rectangle.
3. according to the phased and packed card of claim 1, wherein the size of output area has been designed to the effect of diffraction groove.
4. according to the phased and packed card of claim 1, wherein string shape groove is perpendicular to the major axis of output area.
5. according to the phased and packed card of claim 1, wherein string shape groove is parallel to the major axis of output area.
6. according to the phased and packed card of claim 1, wherein said input face is circular, and wherein said minor axis be not more than described circular input face diameter 33%.
7. according to the phased and packed card of claim 1, wherein said minor axis be not more than described circular input face diameter 25%.
8. according to the phased and packed card of claim 1, wherein said major axis be not less than described circular input face diameter 75%.
9. according to the phased and packed card of claim 1, it and coupled waveguide combination, this coupled waveguide has and the described output area form fit and the throat of aliging with it.
10. phased and packed card according to Claim 8, it and waveguide combination, wherein said waveguide has the cross section of rectangle on whole length.
11. according to the phased and packed card of claim 1, wherein said output has the throat that is extended out by described output area phased and packed card, and comprises the device in the waveguide that is installed to the throat with coupling.
12. phased and packed card according to claim 1, it is assembled among the compressed drive of being made by described phased and packed card and spherical membrane combination, also comprise and by the combination of the permanent magnet between separate interior of air gap and the outer utmost point spare, one voice coil loudspeaker voice coil and described diaphragm form one and are received in the described air gap, and this compressed drive has one by throat phased and that the packed card output area extends out.
13. assembly according to the compressed drive of claim 12, itself and one have throat and mouthful acoustical waveguide combined, the throat of acoustical waveguide is consistent with throat's shape of compressed drive, and the throat that the throat of acoustical waveguide is compressed driver compresses, alignment and acoustics coupling ground receives.
14. according to the assembly of claim 13, wherein the throat of compressed drive is designed to diffraction groove.
15. according to the assembly of claim 14, wherein the throat of acoustical waveguide also is designed to be compressed the diffraction groove that the throat of driver compresses and receives alignedly.
16. according to the assembly of claim 15, wherein said acoustical waveguide has rectangular cross section on its whole length.
17. assembly according to claim 13, wherein the distance from the throat of the throat of diaphragm by each described input hole, each respective channel, each corresponding output hole, compressed drive, acoustical waveguide to the mouth of acoustical waveguide equates basically, provides straight acoustic wavefront along described mouthful axle thus.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/AU2000/001157 WO2002025991A1 (en) | 2000-09-22 | 2000-09-22 | Direct coupling of waveguide to compression driver having matching slot shaped throats |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1461577A CN1461577A (en) | 2003-12-10 |
| CN100413379C true CN100413379C (en) | 2008-08-20 |
Family
ID=3700850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008200319A Expired - Fee Related CN100413379C (en) | 2000-09-22 | 2000-09-22 | Direct coupling of waveguide to compression driver having matching slot shaped throats |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1330936B1 (en) |
| CN (1) | CN100413379C (en) |
| AT (1) | ATE448648T1 (en) |
| AU (2) | AU2000276332B2 (en) |
| DE (1) | DE60043311D1 (en) |
| WO (1) | WO2002025991A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7177437B1 (en) | 2001-10-19 | 2007-02-13 | Duckworth Holding, Llc C/O Osc Audio Products, Inc. | Multiple aperture diffraction device |
| US8718310B2 (en) | 2001-10-19 | 2014-05-06 | Qsc Holdings, Inc. | Multiple aperture speaker assembly |
| ITPR20020064A1 (en) * | 2002-10-31 | 2004-05-01 | Aeb Srl | EQUALIZER, OR PHASE PLUG, FOR ELECTROACOUSTIC TRANSDUCERS. |
| FI120126B (en) | 2004-04-30 | 2009-06-30 | Aura Audio Oy | A method for providing a smooth sound wave front with a planar waveguide, speaker structure and acoustic line emitter |
| GB2443228B (en) * | 2006-10-25 | 2010-02-10 | Gary Paul Nicholson | Piezo-electric loudspeaker |
| US8917896B2 (en) | 2009-09-11 | 2014-12-23 | Bose Corporation | Automated customization of loudspeakers |
| US9111521B2 (en) | 2009-09-11 | 2015-08-18 | Bose Corporation | Modular acoustic horns and horn arrays |
| US9049519B2 (en) | 2011-02-18 | 2015-06-02 | Bose Corporation | Acoustic horn gain managing |
| DE102012107645B4 (en) * | 2012-08-21 | 2015-04-30 | D & B Audiotechnik Gmbh | ACOUSTIC TRANSFORMER |
| WO2017030914A1 (en) | 2015-08-14 | 2017-02-23 | Dolby Laboratories Licensing Corporation | Upward firing loudspeaker having asymmetric dispersion for reflected sound rendering |
| US9712911B2 (en) * | 2015-12-22 | 2017-07-18 | Bose Corporation | Conformable adaptors for diffraction slots in speakers |
| EP3429224A1 (en) * | 2017-07-14 | 2019-01-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Loudspeaker |
| EP3644623B1 (en) * | 2018-10-26 | 2022-02-23 | B&C Speakers S.P.A. | Coaxial compression driver |
| BE1028524B1 (en) * | 2020-07-31 | 2022-02-28 | Aed Distrib Nv | Line source speaker arrangement |
| US11877120B2 (en) * | 2022-06-13 | 2024-01-16 | Harman International Industries, Incorporated | Compression driver having rectangular exit |
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| CN2082935U (en) * | 1990-07-06 | 1991-08-14 | 林光耀 | Bugle type loudspeaker |
| US5117462A (en) * | 1991-03-20 | 1992-05-26 | Jbl Incorporated | Phasing plug for compression driver |
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| CN1258185A (en) * | 1998-09-03 | 2000-06-28 | 伯斯有限公司 | Waveguide electro-acoustic transducer |
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| JPS54162536A (en) * | 1978-06-13 | 1979-12-24 | Matsushita Electric Ind Co Ltd | Horn speaker |
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| GB8726489D0 (en) * | 1987-11-12 | 1987-12-16 | Grunberg R M | Electro-acoustic transducers |
| US4776428A (en) * | 1987-11-16 | 1988-10-11 | Belisle Acoustique Inc. | Sound projection system |
| FR2627886B1 (en) * | 1988-02-29 | 1994-05-13 | Heil Christian | CYLINDRICAL SOUND WAVE GUIDE |
| US5900593A (en) * | 1995-07-31 | 1999-05-04 | Adamson; Alan Brock | Loudspeaker system |
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2000
- 2000-09-22 AU AU2000276332A patent/AU2000276332B2/en not_active Ceased
- 2000-09-22 WO PCT/AU2000/001157 patent/WO2002025991A1/en active IP Right Grant
- 2000-09-22 AT AT00965650T patent/ATE448648T1/en not_active IP Right Cessation
- 2000-09-22 AU AU7633200A patent/AU7633200A/en active Pending
- 2000-09-22 EP EP00965650A patent/EP1330936B1/en not_active Expired - Lifetime
- 2000-09-22 DE DE60043311T patent/DE60043311D1/en not_active Expired - Lifetime
- 2000-09-22 CN CNB008200319A patent/CN100413379C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082935U (en) * | 1990-07-06 | 1991-08-14 | 林光耀 | Bugle type loudspeaker |
| US5117462A (en) * | 1991-03-20 | 1992-05-26 | Jbl Incorporated | Phasing plug for compression driver |
| US6064745A (en) * | 1997-09-26 | 2000-05-16 | Peavey Electronics Corporation | Compression driver phase plug |
| CN2315749Y (en) * | 1997-11-28 | 1999-04-21 | 邹余龙 | Power-operated loudspeaker |
| CN1258185A (en) * | 1998-09-03 | 2000-06-28 | 伯斯有限公司 | Waveguide electro-acoustic transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2000276332B2 (en) | 2005-03-10 |
| CN1461577A (en) | 2003-12-10 |
| ATE448648T1 (en) | 2009-11-15 |
| AU7633200A (en) | 2002-04-02 |
| DE60043311D1 (en) | 2009-12-24 |
| EP1330936A1 (en) | 2003-07-30 |
| WO2002025991A1 (en) | 2002-03-28 |
| EP1330936B1 (en) | 2009-11-11 |
| EP1330936A4 (en) | 2006-12-27 |
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Granted publication date: 20080820 Termination date: 20120922 |