EP1330936A4 - 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

Info

Publication number
EP1330936A4
EP1330936A4 EP00965650A EP00965650A EP1330936A4 EP 1330936 A4 EP1330936 A4 EP 1330936A4 EP 00965650 A EP00965650 A EP 00965650A EP 00965650 A EP00965650 A EP 00965650A EP 1330936 A4 EP1330936 A4 EP 1330936A4
Authority
EP
European Patent Office
Prior art keywords
waveguide
plug
acoustic
phasing
aspect ratio
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.)
Granted
Application number
EP00965650A
Other languages
German (de)
French (fr)
Other versions
EP1330936A1 (en
EP1330936B1 (en
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/en
Publication of EP1330936A4 publication Critical patent/EP1330936A4/en
Application granted granted Critical
Publication of EP1330936B1 publication Critical patent/EP1330936B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

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)

Abstract

There is disclosed an acoustic driver having a phasing and compression plug and its direct coupling to an acoustic waveguide having an entry throat with a non-unity aspect ratio, such as a rectangular diffraction slot. The phasing and compression plug has an input end with an input surface having a plurality of input apertures configured in a parallel array of spaced-apart chordal slits. The opposite, output end of the plug has a like plurality of output apertures contained in an output region having unequal length and width dimensions such that the area of the output region is less than that of the input surface. A plurality of passages through the plug body connect each respective input aperture to the corresponding output aperture wherein the relative lengths of the passages are preselected to provide an acoustic wavefront which is concave at its major (vertical) axis and planar or convex across its minor (horizontal) axis. The phasing and compression plug of the invention affects the transition of the bounds of the wavefront from round to a shape having a non-unity aspect ratio such that the throat of the driver can be directly coupled to an acoustic waveguide having a throat with a matching non-unity aspect ratio shape, thereby eliminating the requirement for a round-to-rectangular transition coupled and also for a waveguide or horn with an internal diffraction slot. Consequently, the above factors contribute to enable a cylindrically expanding wavefront to be accurately propagated out of one of and thus out of an array of waveguide mouths.
EP00965650A 2000-09-22 2000-09-22 Direct coupling of waveguide to compression driver having matching slot shaped throats Expired - Lifetime EP1330936B1 (en)

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 (en) 2003-07-30
EP1330936A4 true EP1330936A4 (en) 2006-12-27
EP1330936B1 EP1330936B1 (en) 2009-11-11

Family

ID=3700850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00965650A Expired - Lifetime EP1330936B1 (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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8718310B2 (en) 2001-10-19 2014-05-06 Qsc Holdings, Inc. Multiple aperture speaker assembly
US7177437B1 (en) 2001-10-19 2007-02-13 Duckworth Holding, Llc C/O Osc Audio Products, Inc. Multiple aperture diffraction device
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
US9111521B2 (en) 2009-09-11 2015-08-18 Bose Corporation Modular acoustic horns and horn arrays
US8917896B2 (en) 2009-09-11 2014-12-23 Bose Corporation Automated customization of loudspeakers
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
ES2919959T3 (en) * 2018-10-26 2022-07-29 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

Citations (4)

* 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
WO1989004581A1 (en) * 1987-11-12 1989-05-18 Robert Michael Grunberg Electro-acoustic transducers
US5163167A (en) * 1988-02-29 1992-11-10 Heil Acoustics Sound wave guide
US5900593A (en) * 1995-07-31 1999-05-04 Adamson; Alan Brock Loudspeaker system

Family Cites Families (7)

* 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
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
US6771787B1 (en) * 1998-09-03 2004-08-03 Bose Corporation Waveguide electroacoustical transducing

Patent Citations (4)

* 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
WO1989004581A1 (en) * 1987-11-12 1989-05-18 Robert Michael Grunberg Electro-acoustic transducers
US5163167A (en) * 1988-02-29 1992-11-10 Heil Acoustics Sound wave guide
US5900593A (en) * 1995-07-31 1999-05-04 Adamson; Alan Brock Loudspeaker system

Also Published As

Publication number Publication date
DE60043311D1 (en) 2009-12-24
EP1330936A1 (en) 2003-07-30
WO2002025991A1 (en) 2002-03-28
CN100413379C (en) 2008-08-20
ATE448648T1 (en) 2009-11-15
EP1330936B1 (en) 2009-11-11
AU2000276332B2 (en) 2005-03-10
AU7633200A (en) 2002-04-02
CN1461577A (en) 2003-12-10

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