GB2446547A - Acoustic horn waveguides - Google Patents

Acoustic horn waveguides

Info

Publication number
GB2446547A
GB2446547A GB0810537A GB0810537A GB2446547A GB 2446547 A GB2446547 A GB 2446547A GB 0810537 A GB0810537 A GB 0810537A GB 0810537 A GB0810537 A GB 0810537A GB 2446547 A GB2446547 A GB 2446547A
Authority
GB
United Kingdom
Prior art keywords
obstructer
waveguide
line array
wavefront
inlet
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
GB0810537A
Other versions
GB2446547B (en
GB0810537D0 (en
Inventor
Ambrose Thompson
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.)
Martin Audio Ltd
Original Assignee
Martin Audio Ltd
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 Martin Audio Ltd filed Critical Martin Audio Ltd
Publication of GB0810537D0 publication Critical patent/GB0810537D0/en
Publication of GB2446547A publication Critical patent/GB2446547A/en
Application granted granted Critical
Publication of GB2446547B publication Critical patent/GB2446547B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • 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
    • 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
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • 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
    • H04R1/347—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 for obtaining a phase-shift between the front and back acoustic wave
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/405—Non-uniform arrays of transducers or a plurality of uniform arrays with different transducer spacing

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Waveguide Aerials (AREA)

Abstract

An acoustic horn waveguide for use in a curved line array and having a predetermined acoustic operating frequency range, comprising an inlet (20) and an outlet (22) connected by a diverging passage, an obstructer (26) disposed towards the inlet end of the passage and around which sound waves from the inlet are directed, and a mixing region (50) downstream of the obstructer, wherein sound waves which have passed around the obstructer have a concave wavefront and merge within the waveguide in a mixing region (50) downstream of the obstructer before propagating from the outlet with a convex wavefront such that when the waveguide is assembled with at least one further such waveguide as a curved line array, the combined wavefront from the assembled line array has a desired curvature.
GB0810537A 2005-11-09 2006-11-09 Acoustic horn waveguides Active GB2446547B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0522876A GB2432289A (en) 2005-11-09 2005-11-09 Horn for a curved line array of loudspeakers
PCT/GB2006/004197 WO2007054709A2 (en) 2005-11-09 2006-11-09 Acoustic horn waveguides

Publications (3)

Publication Number Publication Date
GB0810537D0 GB0810537D0 (en) 2008-07-16
GB2446547A true GB2446547A (en) 2008-08-13
GB2446547B GB2446547B (en) 2011-02-09

Family

ID=35516647

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0522876A Withdrawn GB2432289A (en) 2005-11-09 2005-11-09 Horn for a curved line array of loudspeakers
GB0810537A Active GB2446547B (en) 2005-11-09 2006-11-09 Acoustic horn waveguides

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0522876A Withdrawn GB2432289A (en) 2005-11-09 2005-11-09 Horn for a curved line array of loudspeakers

Country Status (2)

Country Link
GB (2) GB2432289A (en)
WO (1) WO2007054709A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US8309045B2 (en) 2011-02-11 2012-11-13 General Electric Company System and method for controlling emissions in a combustion system
US9049519B2 (en) 2011-02-18 2015-06-02 Bose Corporation Acoustic horn gain managing
GB2511145B (en) * 2013-05-31 2015-07-01 Cerberus Black Ltd Acoustic apparatus and operation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091891A (en) * 1973-01-17 1978-05-30 Onkyo Kabushiki Kaisha Horn speaker
US4390078A (en) * 1982-02-23 1983-06-28 Community Light & Sound, Inc. Loudspeaker horn
US4713799A (en) * 1984-10-15 1987-12-15 Deere & Company Ultrasonic horn with sidelobe suppressing centerpiece
EP1460880A2 (en) * 2003-03-20 2004-09-22 Anthony John Andrews Loudspeaker array

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6581719B2 (en) * 2000-08-02 2003-06-24 Alan Brock Adamson Wave shaping sound chamber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091891A (en) * 1973-01-17 1978-05-30 Onkyo Kabushiki Kaisha Horn speaker
US4390078A (en) * 1982-02-23 1983-06-28 Community Light & Sound, Inc. Loudspeaker horn
US4713799A (en) * 1984-10-15 1987-12-15 Deere & Company Ultrasonic horn with sidelobe suppressing centerpiece
EP1460880A2 (en) * 2003-03-20 2004-09-22 Anthony John Andrews Loudspeaker array

Also Published As

Publication number Publication date
WO2007054709A3 (en) 2007-08-16
GB2446547B (en) 2011-02-09
WO2007054709A2 (en) 2007-05-18
GB2432289A (en) 2007-05-16
GB0810537D0 (en) 2008-07-16
GB0522876D0 (en) 2005-12-21

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20140710 AND 20140716

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20180104 AND 20180110