EP1330936B1 - Direktkopplung von wellenleitern an einen komprimierungstreiber mit passenden schlitzförmigen hälsen - Google Patents

Direktkopplung von wellenleitern an einen komprimierungstreiber mit passenden schlitzförmigen hälsen Download PDF

Info

Publication number
EP1330936B1
EP1330936B1 EP00965650A EP00965650A EP1330936B1 EP 1330936 B1 EP1330936 B1 EP 1330936B1 EP 00965650 A EP00965650 A EP 00965650A EP 00965650 A EP00965650 A EP 00965650A EP 1330936 B1 EP1330936 B1 EP 1330936B1
Authority
EP
European Patent Office
Prior art keywords
horn
input
output
plug
apertures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00965650A
Other languages
English (en)
French (fr)
Other versions
EP1330936A4 (de
EP1330936A1 (de
Inventor
Robert Michael Grunberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1330936A1 publication Critical patent/EP1330936A1/de
Publication of EP1330936A4 publication Critical patent/EP1330936A4/de
Application granted granted Critical
Publication of EP1330936B1 publication Critical patent/EP1330936B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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

Definitions

  • This invention relates to electro-acoustic transducers and specifically to the type commonly referred to as compression drivers which are used in conjunction with acoustic horns, waveguides or directional baffles.
  • Compression drivers have traditionally been equipped with diaphragms having a spherical section radiating surface of area A in , which conforms to a spherical input surface of a phasing/compression plug (acoustic transformer or equalizer).
  • the acoustic pressure generated by movement of the diaphragm is directed into inlet apertures, in the form of slits or holes, on the spherical input surface of the compression plug through a plurality of passages that pass through the body of the compression plug to emerge from outlet ports which are collectively contained in a circular output region, called the throat of area A out , on the front of the driver disposed towards the horn where A out is less than A in .
  • Figures 1 to 3 show various prior art compression plugs 250a, 250b, 250c used in conventional round throated compression drivers (not shown).
  • the input apertures typically consist of distributed holes, concentric slits, radial slits and combinations thereof.
  • the compression plug causes the air displaced by the diaphragm to be compressed and to emerge in planar phased coherence at the circular throat of the driver.
  • Figure 1 shows input apertures provided as concentric slits;
  • Figure 2 shows input apertures provided as radial slits;
  • Figure 3 shows input apertures provided as distributed holes.
  • a dashed circle 251 represents the location of the compression driver's round throat on the far side of the illustrated compression plugs.
  • Compression plugs for high frequency drivers have been designed with a chosen compression ratio, typically about 10:1, and with the distances between the inlet apertures being sufficiently small to enable a unique phase relationship up to the highest desired frequency which forms a plane wave at the circular throat on the front of the driver.
  • a chosen compression ratio typically about 10:1
  • the distances between the inlet apertures being sufficiently small to enable a unique phase relationship up to the highest desired frequency which forms a plane wave at the circular throat on the front of the driver.
  • the predominant model of the day had generated a plane wave at the throat of the compression driver, which coupled to a acoustic horn, having a round input throat of equal diameter and in this model, the plane wave at the throat of the driver propagates through the horn and exits at the horn mouth, impossibly, as a non-divergent plane wave.
  • Multicell horns 200 generally have a rectangular throat 201 requiring that an intermediate acoustic coupler 210 that provides a round to square, or round to rectangular (unity to non-unity) transition from the circular throat of the compression driver (not shown) to the rectangular input throat 201 of the horn.
  • a diffraction slot is defined as an acoustically diffractive aperture with a non-unity aspect (height/width) ratio.
  • the diffraction slot is typically, but not necessarily rectangular and according to this present specification, is necessarily of lesser area than that of the radiating diaphragm.
  • US 4,718,517 discloses a speaker system with a frustro-conical diaphragm and a wedge that forms two diverging channels between its respective side walls and the apposed wall of a main plug structure
  • JP54-162536 discloses a phase plug for a compression driver having parallel slits. The is made approximately equal to reduce high-frequency distortions.
  • the objectives of this invention are to provide:
  • This invention relates generally to a phasing/compression plug and the direct coupling of its acoustic output to a waveguide or horn having a slot throat.
  • the plug has an input or primary end having a surface conforming to the contour of the radiating diaphragm and spaced therefrom and having a plurality of inlet apertures, preferably slits, in parallel array at spaced-apart increments, and it has a like plurality of output apertures in parallel and juxtaposed array on the secondary end of the plug body, which collectively form an output aperture within a region which has unequal length and width dimensions and which is of lesser area than the area of the input surface.
  • a plurality of passages through the plug body connect each of the primary surface input apertures to a respective output aperture.
  • the relative lengths of the passages are preselected to provide an acoustic wavefront which may be concave along its major (vertical) axis to achieve narrow vertical dispersion, and planar or convex across its minor (horizontal) axis to accomplish wide horizontal dispersion by diffraction.
  • the phasing/compression plug of the invention effects the transition of the bounds of the wavefront from round to a non-unity aspect ratio in a novel function of the plug such that the throat of the driver can be directly coupled to an acoustic waveguide or horn having a matching slot throat, thereby eliminating the requirement for a transition coupler and for a horn with an internal diffraction slot.
  • Figures 5-8 and 15 show a first preferred compression driver 10 containing a first preferred phasing/compression plug 14 (generally hereafter just “plug” for the sake of brevity).
  • this particular compression driver 10 is formed from the plug 14 in combination with a diaphragm 30 with an integral voice coil 36 a circular array of permanent magnets 28 and associated pole pieces 13, 20 and a cover 18.
  • the plug 14 generally comprises a body (not numbered) with an input end 12 and an output end 46.
  • the input end may be regarded as an input surface 12 of area A in
  • the output end 46 may be regarded as an output region 46 of lesser area A out .
  • Figure 5 shows the back of the compression driver 10 without its cover 18 or diaphragm 30 in order to expose the input surface 12 of the plug 14.
  • Figure 6 shows the front 54 of the compression driver 10 that contains a throat (not separately numbered) formed, in part, from the output region 46 of the plug 14.
  • the cover 18 and an outer pole piece 20 are combined to form a cylindrical housing 16.
  • the cover 18 has a flange 22 which is secured to the outer pole piece 20 with assembly screws (not shown) which are received in threaded bores 26 in the outer pole piece 20.
  • the outer pole piece 20 supports the circular array of permanent magnets 28 which surround the inner pole piece 13.
  • the plug 14 is received in an arcuately tapered recess 15 in the inner pole piece 13, its input surface 12 conforming to an inward surface of the diaphragm 30.
  • the diaphragm 30 and the input surface 12 have spherical surfaces, but other geometries are possible.
  • the diaphragm 30 has an annular rim 32 that is received between the flange 22 of the cover 18 and outer pole piece 20.
  • the diaphragm 30, in practice, is formed of metal foil or a fiber composite with a thickness from about 0.002 for high frequency drivers to about 0.02 inch for middle frequency drivers.
  • the annular rim 32 of the diaphragm 30 has an annular compliance section 34 and a cylindrical voice coil 36 that extends from the diaphragm 30 adjacent to the compliance 34.
  • the voice coil 36 extends into an annular air gap 38 between the inner pole piece 13 and the outer pole piece 20 such that currents driven through the voice coil 36 will cause the diaphragm 30 to move accordingly.
  • the inner pole piece 13 provides a planar surface 40 on which to mount a horn flange.
  • Figure 7 is a sectional view of the compression driver 10 along the section line 7-7 of Figure 5 .
  • the cover 18 and the diaphragm 30 are depicted and the spherical nature of the diaphragm 30 and the plug's input surface 12 is visible.
  • the internal topology of the plug 14 is best understood through simultaneous reference to Figures 5-8 and 15 .
  • the figures collectively show a plurality of input apertures 50 on the plug's spherical input surface 12, the input apertures 50 opening to a corresponding plurality of passages 58 that expand to the plug's output region 46.
  • the preferred input apertures 50 are provided as closely-spaced, parallel array of chordal slits 50. Above a frequency related to the diameter and material of the diaphragm, pistonic behaviour ceases and the surface area of a circular diaphragm tends to breakup in radial and concentric modes of resonance.
  • the parallel, chordal slits beneficially randomize the resonant acoustic output from the modal vibration of the diaphragm, resulting in smoother response in the resonant frequency range.
  • FIG. 5A for example, the parallel chordal slits 50 are used in a plug suitable for use in a compression driver having a rectangular throat 46A that is oriented in parallel with the slits rather than perpendicularly as shown in Figure 5 .
  • the parallel chordal slits 50 are used in a plug suitable for use in a compression driver having a circular throat 46B.
  • each passage 58 has converging side-walls 60 and 62 and, as shown in Figure 8 , each passage 58 has diverging top and bottom walls 64 and 66. In the direction of propagation, therefore, the passages 58 converge toward the output region 46 along one axis (see Figure 7 ) while expanding, overall, in terms of cross-sectional area from input aperture 50 to output aperture 48.
  • Figure 5 shows the input apertures 50 in perpendicular alignment with the output region 46 (dashed line).
  • the output apertures contained in the output region are of lesser width and greater height than said slits.
  • Other orientations are possible.
  • the input apertures 50 for example, could also have a parallel orientation relative to the output region 46A as shown in Figure 5A .
  • the output apertures contained in the output region are of greater width and lesser height than longest of said slits.
  • the passages 58 are contoured and dimensioned as necessary for the desired performance of the compression driver 10 and associated waveguide or horn.
  • the ratio of the area of each input aperture 50 to the area of its respective output aperture 48 is preferably a constant value to provide the same expansion rate through each passage 58.
  • the length "D 1 " of the side walls 60, 62 is preferably equal to or less than the axial distance "D 2 " from an apex 68 of the input surface 12 to a corresponding point in the output region 46.
  • This dimensional parameter adjusts a wavefront 72 that is flat, or slightly convex across the minor axis of the output region 46.
  • the distances through the passages 58 in the direction of propagation are preferably unequal, with the distance through a centermost passage 74 being greater than that through a laterally located passage 58.
  • the spatial relationship with the spherical diaphragm generates a concave wavefront 72 along the major axis of the output region 46.
  • the plug's passages 58 are preferably dimensioned, therefore, to generate a wavefront 72 that is concave over the major axis and straight or convex over the minor axis of the output region 46.
  • a concave wavefront 72 over the major axis of the driver's output region 46 is desirable in terms of its propagation characteristics when the driver 10 is attached to a suitably dimensioned horn having appropriately divergent top and bottom walls.
  • the concave wavefront 72 will propagate through such a horn and exit the horn's mouth as a substantially straight wavefront along the vertical axis.
  • the result is a cylindrically expanding wavefront emanating from the mouth of the horn, a wavefront that provides higher vertical directivity than possible with a conventional round throated driver coupled to an equivalently dimensioned horn.
  • the prior art combination undesirably forms a deformed convex spherical wavefront at the horn's mouth, a convex wavefront is inherently divergent.
  • the preferred plug 14 has bridging ribs 52 within the input apertures 50 so that they are integral with the plug 14 thereby permitting the plug 14 to be fabricated and placed in the assembly as a unitary body.
  • the throat of the driver must ultimately couple to the throat of the horn.
  • Drivers have traditionally been provided with round throats and such drivers directly couple to a horn with a round throat (that may or may not have transitioned to another internal profile), or indirectly to a horn with a rectangular throat by the use of a transition coupler or throat adapter having a round-to-rectangular configuration.
  • Figure 6 shows the output region 46 containing outlet apertures 48 on the front 54 of the compression driver 10.
  • the preferred output region 46 has a greater height (h) than width such that it has a major axis 46 h and a minor axis 46. (w). Stated another way, the output region 46 has a non-unity aspect ratio in contrast to circular or square output region of known types that have an aspect ratio of unity.
  • the minor axis of the output region 46 is preferably no greater than 33 percent of the diameter of the circular vibrating surface of the diaphragm 30, most preferably 25 percent for a high frequency compression driver.
  • the major axis of the output region 46 is preferably no less than 75 percent of the diameter of the vibrating surface of the diaphragm 30.
  • Figure 6 shows an output region 46 having a rectangular shape for coupling directly to a matching slot throated horn.
  • This aspect of the invention is satisfied by any output region having a non-unity aspect ratio such as an ellipse, an elongated polygon, or any other elongated shape.
  • Figure 9 shows the first preferred compression driver 10 that is coupled directly to an acoustic horn 76 having widely diverging sidewalls 78 and 80 and slightly diverging top and bottom walls 82 and 84.
  • the horn 76 has a rectangular throat 86 that expands to a rectangular mouth 88.
  • the horn 76 has a circular mounting flange 90 for attachment to the front 54 of the compression driver 10.
  • the horn 76 is attached to the driver's front 54 with screws 42 that engage corresponding screw holes 43 in the planar surface 40 of the inner pole piece 13 (shown in Figure 7 ).
  • the driver's slot throat (defined mainly by the output region 46 of the plug 14) is aligned with and acoustically coupled directly to the horn's slot throat 86. It is now possible, therefore, to couple the driver 10 directly to a horn having a rectangular throat 86 that is sufficiently narrow as to function as a diffraction slot. There is beneficially no need to provide a separate transition coupler as shown in Figure 4 , or to provide an internal round-to-rectangular transition within the horn.
  • Figure 10 shows an alternative horn having an external mounting surface 94 that surrounding the throat 86 and supports a plurality of threaded posts 96 that engage holes in a suitable mounting bracket that is attached to or integrally formed with the driver 10.
  • the number of posts 96 may vary, but there are preferably four.
  • Figures 11 and 12 show a second preferred compression driver 96 containing a second preferred plug 95 suitable for use with horns or waveguides in mid-frequency range applications.
  • Figure 11 shows the back of the driver 96.
  • Figure 12 is a cross-section of the driver 96, taken along lines 12-12 in Figure 11 .
  • the second preferred driver 96 comprises, in addition to the plug 95, a diaphragm 108, a voice coil (not numbered), an annular magnet 98, and associated pole pieces 100, 102, and a cover (not numbered).
  • the plug 95 generally comprises a body (not numbered) with an input end 118 and an output end 120.
  • the input end may be regarded as an input surface 118 of area A in
  • the output end may be regarded as an output region 120 of lesser area A out .
  • the diaphragm 108 has an annular skirt 114 and a domed center section 116.
  • the center section 116 is shown as convex, but it may be concave.
  • the circular magnet 98 is in contact with the inner and outer pole pieces 100, 102 and those pole pieces form an annular air gap 104.
  • the diaphragm's voice coil extends into that gap 104 and electrical leads from the coil extend to terminals 110 on the frame 112 of the driver 96 for suitable connection to an amplifier.
  • the contour of the diaphragm 108 conforms to the plug's input surface 118.
  • the plug 95 includes a plurality of input apertures 126 on its input surface 118, the input apertures 126 opening to a corresponding plurality of passages 124 that expand to a plurality of output apertures 120 in an output region 127.
  • the output region 127 serves as the driver's throat as previously described with reference to the driver 10 shown in Figures 5-8 .
  • Figures 13 and 14 show a third preferred compression driver 128 containing a third plug 130 that is suitable for wide-angle applications.
  • Figure 13 shows the back of the driver 128.
  • Figure 14 is a cross-section of the driver 128, taken along lines 13-13 of Figure 13 .
  • the third preferred driver 128 comprises, in addition to the plug 130, a diaphragm 146, a voice coil (not numbered), a cylindrical array of magnets 136, and associated pole pieces 138, 140, and a cover (not numbered).
  • the plug 130 generally comprises a body (not numbered) with an input end 134 and an output end 168.
  • the input end may be regarded as an input surface 134 of area A in and the output end may be regarded as an output region 168 of lesser area A out .
  • the cylindrical array of magnets 136 are in contact with the inner and outer pole piece 138, 140 that form an annular air gap 142.
  • the diaphragm's coil is located in that air gap.
  • the diaphragm 146 further includes an annular compliance 154, and a periphery 148 that is secured between an annular flange 152 of the outer pole piece 140 and a ring 150 with fasteners 144 that seat in threaded bores (not shown).
  • the plug 130 has an annular flange 156.
  • the plug 130 seats in a tapered recess 160 with its annular flange 156 in contact with the inner pole piece 138.
  • the plug's input surface includes input apertures 158 that lead to passages 160 that open to output apertures 162 contained in the output region 168.
  • the third preferred plug 130 is suitable for wide-angle applications in that it has a concave input surface 134 that produces a convex or divergent wavefront along the major axis of the output region 168.
  • the invention has been described with reference to the illustrated and presently preferred embodiments. It is not intended that the invention be unduly limited by this disclosure of the preferred embodiments. Instead, it is intended that the invention be defined by the means, and their obvious equivalents, set forth in the following claims.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Waveguide Connection Structure (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Claims (7)

  1. Eine Vorrichtung, die einen elektroakustischen Wandler und einen Schalltrichter aufweist, der an dem elektroakustischen Wandler angebracht ist, wobei der elektroakustische Wandler eine Membran (30) und einen Phasen- und Kompressionsstecker (14, 14A) aufweist, wobei der Stecker aufweist:
    - einen Körper mit einem Eingangsende (12), das eine Eingangsfläche (12) einer Fläche Ain aufweist, und mit einem Ausgangsende (46), das einen Ausgangsbereich (46) einer Fläche Aout aufweist, wobei Ain > Aout,
    - eine Mehrzahl von Eingangsöffnungen (50), die als Sehnenschlitze vorgesehen sind, die in einer im Wesentlichen parallelen Anordnung im Abstand voneinander auf der Eingangsfläche (12) an dem Eingangsende des Körpers angeordnet sind,
    - eine entsprechende Mehrzahl von Ausgangsöffnungen (48), die in dem Ausgangsbereich (46) am Ausgangsende (46) des Körpers enthalten sind, und
    - eine Mehrzahl von Durchgängen (58) durch den Körper, wobei jeder Durchgang (58) eine aus der Mehrzahl von Eingangsöffnungen (50) mit einer jeweiligen Ausgangsöffnung (48) verbindet und sich von den Eingangsöffnungen (50) zu den Ausgangsöffnungen (48) hin in der Fläche vergrößert,
    wobei die Membran (30) einen ringförmigen Rand (32) aufweist, wobei der ringförmige Rand (32) einen ringförmigen Federungsabschnitt (34) aufweist, wobei die Membran (30) eine sphärische Fläche aufweist, wobei die sphärische Fläche benachbart zu dem ringförmigen Rand (32) ist, und wobei der Schalltrichter eine Mündung (88) und eine Verengung aufweist,
    dadurch gekennzeichnet, dass
    der Ausgangsbereich (46) eine rechteckige Form mit einer Hauptachse (46h) aufweist,
    die Strecken durch die Durchgänge (58) hindurch in der Ausbreitungsrichtung ungleich sind, wobei die Strecke durch einen zentralsten Durchgang (74) größer als durch einen seitlich positionierten Durchgang (58) ist, so dass ein räumliches Verhältnis zu der sphärischen Membran eine konkave Wellenfront entlang der Hauptachse (46h) erzeugt,
    wobei der Ausgangsbereich (46) direkt mit einer passenden Schlitzverengung des Schalltrichters verbunden ist, wobei der Schalltrichter eine divergente obere und untere Wand aufweist, so dass die konkave Wellenfront, die sich durch den Schalltrichter ausbreitet, die Mündung (88) des Schalltrichters als eine im Wesentlichen gerade Wellenfront entlang einer vertikalen Achse des Schalltrichters verlässt und so eine sich zylinderförmig ausbreitende Wellenfront aus der Mündung (88) des Schalltrichters austritt.
  2. Die Vorrichtung gemäß Anspruch 1, wobei der Ausgangsbereich (46) zum Funktionieren als ein Diffraktionsschlitz dimensioniert ist.
  3. Die Vorrichtung gemäß Anspruch 1, wobei die Sehnenschlitze (50) im Wesentlichen senkrecht zu der Hauptachse (46h) des Ausgangsbereichs (46) sind.
  4. Die Vorrichtung gemäß Anspruch 1, wobei die Sehnenschlitze (50) im Wesentlichen parallel zu der Hauptachse (46h) des Ausgangsbereichs (46) sind.
  5. Die Vorrichtung gemäß Anspruch 1, wobei die Eingangsfläche (12) kreisförmig ist, und wobei die Nebenachse (46w) nicht größer als 33 Prozent des Durchmessers der kreisförmigen Eingangsfläche (12) ist.
  6. Die Vorrichtung gemäß Anspruch 1, wobei die Eingangsfläche (12) kreisförmig ist, und wobei die Nebenachse (46w) nicht größer als 25 Prozent des Durchmessers der kreisförmigen Eingangsfläche (12) ist.
  7. Die Vorrichtung gemäß Anspruch 1, wobei die Eingangsfläche (12) kreisförmig ist, und wobei die Hauptachse (46h) nicht kleiner als 75 Prozent des Durchmessers der kreisförmigen Eingangsfläche (12) ist.
EP00965650A 2000-09-22 2000-09-22 Direktkopplung von wellenleitern an einen komprimierungstreiber mit passenden schlitzförmigen hälsen Expired - Lifetime EP1330936B1 (de)

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 (3)

Publication Number Publication Date
EP1330936A1 EP1330936A1 (de) 2003-07-30
EP1330936A4 EP1330936A4 (de) 2006-12-27
EP1330936B1 true EP1330936B1 (de) 2009-11-11

Family

ID=3700850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00965650A Expired - Lifetime EP1330936B1 (de) 2000-09-22 2000-09-22 Direktkopplung von wellenleitern an einen komprimierungstreiber mit passenden schlitzförmigen hälsen

Country Status (6)

Country Link
EP (1) EP1330936B1 (de)
CN (1) CN100413379C (de)
AT (1) ATE448648T1 (de)
AU (2) AU2000276332B2 (de)
DE (1) DE60043311D1 (de)
WO (1) WO2002025991A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4294045A1 (de) * 2022-06-13 2023-12-20 Harman International Industries, Inc. Kompressionstreiber mit rechteckigem ausgang

Families Citing this family (14)

* Cited by examiner, † Cited by third party
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 (it) * 2002-10-31 2004-05-01 Aeb Srl Equalizzatore, o phase plug, per trasduttori elettroacustici.
FI120126B (fi) 2004-04-30 2009-06-30 Aura Audio Oy Menetelmä tasaisen ääniaaltorintaman aikaansaamiseksi sekä tasoaaltosuuntain, kaiutinrakenne ja akustinen linjasäteilijä
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 (de) * 2012-08-21 2015-04-30 D & B Audiotechnik Gmbh Akustischer wandler
US10425723B2 (en) 2015-08-14 2019-09-24 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 (de) * 2017-07-14 2019-01-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Lautsprecher
EP3644623B1 (de) * 2018-10-26 2022-02-23 B&C Speakers S.P.A. Koaxialer kompressionstreiber
BE1028524B1 (nl) * 2020-07-31 2022-02-28 Aed Distrib Nv Lijnbronluidsprekerinrichting

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54162536A (en) * 1978-06-13 1979-12-24 Matsushita Electric Ind Co Ltd Horn speaker
US4776428A (en) * 1987-11-16 1988-10-11 Belisle Acoustique Inc. Sound projection system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718517A (en) * 1986-02-27 1988-01-12 Electro-Voice, Inc. Loudspeaker and acoustic transformer therefor
GB8726489D0 (en) * 1987-11-12 1987-12-16 Grunberg R M Electro-acoustic transducers
FR2627886B1 (fr) * 1988-02-29 1994-05-13 Heil Christian Guide d'onde sonore cylindrique
CN2082935U (zh) * 1990-07-06 1991-08-14 林光耀 号角型扬声器
US5117462A (en) * 1991-03-20 1992-05-26 Jbl Incorporated Phasing plug for compression driver
US5900593A (en) * 1995-07-31 1999-05-04 Adamson; Alan Brock Loudspeaker system
US6064745A (en) * 1997-09-26 2000-05-16 Peavey Electronics Corporation Compression driver phase plug
CN2315749Y (zh) * 1997-11-28 1999-04-21 邹余龙 电动扬声器
US6771787B1 (en) * 1998-09-03 2004-08-03 Bose Corporation Waveguide electroacoustical transducing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54162536A (en) * 1978-06-13 1979-12-24 Matsushita Electric Ind Co Ltd Horn speaker
US4776428A (en) * 1987-11-16 1988-10-11 Belisle Acoustique Inc. Sound projection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4294045A1 (de) * 2022-06-13 2023-12-20 Harman International Industries, Inc. Kompressionstreiber mit rechteckigem ausgang

Also Published As

Publication number Publication date
EP1330936A4 (de) 2006-12-27
EP1330936A1 (de) 2003-07-30
ATE448648T1 (de) 2009-11-15
CN100413379C (zh) 2008-08-20
AU7633200A (en) 2002-04-02
WO2002025991A1 (en) 2002-03-28
DE60043311D1 (de) 2009-12-24
AU2000276332B2 (en) 2005-03-10
CN1461577A (zh) 2003-12-10

Similar Documents

Publication Publication Date Title
US6744899B1 (en) Direct coupling of waveguide to compression driver having matching slot shaped throats
EP1330936B1 (de) Direktkopplung von wellenleitern an einen komprimierungstreiber mit passenden schlitzförmigen hälsen
CN109565628B (zh) 压缩驱动器和用于其的调相插塞组件
US6118883A (en) System for controlling low frequency acoustical directivity patterns and minimizing directivity discontinuities during frequency transitions
US5163167A (en) Sound wave guide
EP1178702B1 (de) Wellenformungsschallgehäuse
EP1071308B1 (de) Mittel-Hochfrequenzlautsprecherssystem
US4685532A (en) Constant directivity loudspeaker horn
US4157741A (en) Phase plug
EP1333698B1 (de) Richtlautsprecher
US6996243B2 (en) Loudspeaker with shaped sound field
US3720787A (en) Omni-directional globular speaker system
US8194904B2 (en) Speaker system with broad directivity
AU2000276332A1 (en) Direct coupling of waveguide to compression driver having matching slot shaped throats
CN110035363B (zh) 扬声器的统一波前全频程波导
US20230362535A1 (en) Compression driver with dome diaphragm and annular exit
US11863957B2 (en) Omnidirectional loudspeaker and compression driver therefor
EP1315398A2 (de) Hornlautsprecher
US8254614B2 (en) Horn speaker with hyperbolic paraboloid lens
CN214627344U (zh) 一种多通道对称结构平面波导管号角
AU602687B2 (en) An adaptor for combining acoustic outputs from transducers
CN117241179A (zh) 具有矩形出口的压缩驱动器
EP4252431A1 (de) Rundstrahllautsprecher mit asymmetrischer vertikaler richtcharakteristik
CN117202013A (zh) 一种双声源波前不共腔水平耦合高音波导
CN117177127A (zh) 一种双声源波前不共腔水平耦合高音波导

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030417

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

A4 Supplementary search report drawn up and despatched

Effective date: 20061127

RIC1 Information provided on ipc code assigned before grant

Ipc: H04R 1/30 20060101AFI20061121BHEP

17Q First examination report despatched

Effective date: 20070308

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60043311

Country of ref document: DE

Date of ref document: 20091224

Kind code of ref document: P

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100222

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100311

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100812

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100212

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20100930

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100930

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100930

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100922

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20110923

Year of fee payment: 12

Ref country code: FR

Payment date: 20111005

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100922

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091111

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120922

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130403

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120922

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121001

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60043311

Country of ref document: DE

Effective date: 20130403