WO2004071129B1 - Multimedia loudspeaker - Google Patents

Multimedia loudspeaker

Info

Publication number
WO2004071129B1
WO2004071129B1 PCT/MK2004/000001 MK2004000001W WO2004071129B1 WO 2004071129 B1 WO2004071129 B1 WO 2004071129B1 MK 2004000001 W MK2004000001 W MK 2004000001W WO 2004071129 B1 WO2004071129 B1 WO 2004071129B1
Authority
WO
WIPO (PCT)
Prior art keywords
loudspeaker
sound wave
bass
desk surface
midrange
Prior art date
Application number
PCT/MK2004/000001
Other languages
French (fr)
Other versions
WO2004071129A3 (en
WO2004071129A2 (en
Inventor
Vladimir Filevski
Original Assignee
Vladimir Filevski
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 Vladimir Filevski filed Critical Vladimir Filevski
Publication of WO2004071129A2 publication Critical patent/WO2004071129A2/en
Publication of WO2004071129A3 publication Critical patent/WO2004071129A3/en
Publication of WO2004071129B1 publication Critical patent/WO2004071129B1/en

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 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • 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
    • H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only 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)

Abstract

The present invention is a two-way loudspeaker that has the following three features: - a horn tweeter (2) with a narrow sound dispersion in a vertical plane so mounted that its reference axis of radiation is angled at between 10 and 40 degrees respective to the horizontal surface; - a bass/midrange unit (3) mounted close to the bottom surface of the loudspeaker so that its acoustic center is less than 63 mm off this bottom surface; - a crossover circuit with a crossover frequency lower than the first minimum in the resultant frequency response of the bass/midrange loudspeaker that comes as a result of the interference between the direct sound wave and the sound wave reflected from a surface on which the loudspeaker is placed. This loudspeaker exhibits a flat frequency response both when standing on a desk or when located in free space. All other known multimedia loudspeakers (intended to stand on a desk) suffer from interference between the direct sound wave and the sound wave reflected from the surface on which the loudspeakers are located, interference which results in an uneven frequency response.

Claims

AMENDED CLAIMS received by the International Bureau on 20 August 2004 : claims 2, 3, 4 have been added.
1. MULTIMEDIA LOUDSPEAKER is a two-way loudspeaker, characterized by:
- its being intended to stand on the substantially horizontal desk surface;
- a horn tweeter with a narrow sound dispersion in a vertical plane, so mounted that its referent axis of radiation is angled respective to the substantially horizontal desk surface;
- a bass/midrange unit placed close to the bottom surface of the loudspeaker enclosure so that its acoustic center is located close to the substantially horizontal desk surface;
- a crossover circuit with a crossover frequency lower than the frequency ofthe first minimum in the resultant frequency response ofthe bass/midrange loudspealcer, which minimum is a result of the interference between the direct sound wave and the sound wave reflected from the desk surface.
2. A loudspeaker according to claim 1, comprising a horn tweeter with sound dispersion less than 55 degrees in a vertical plane, so mounted that its referent axis of radiation is angled between 10 and 40 degrees respective to the substantially horizontal desk surface.
3. A loudspeaker according to claims 1 and 2, comprising a bass/midrange unit which is placed close to the bottom surface ofthe loudspeaker enclosure so that its acoustic center is located at height less than 63 mm from the substantially horizontal desk surface.
4. A loudspeaker according to claims 1 to 3, comprising a crossover circuit with a crossover frequency between 1100 Hz and 3600 Hz, wherein said crossover frequency is lower than the frequency of the first minimum in the resultant frequency response of the bass/midrange loudspeaker, which minimum is a result ofthe interference between the direct sound wave and the sound wave reflected from the desk surface.
Figure imgf000002_0001
PCT/MK2004/000001 2003-02-07 2004-02-05 Multimedia loudspeaker WO2004071129A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MK20030038 2003-02-07
MK3803 2003-02-07

Publications (3)

Publication Number Publication Date
WO2004071129A2 WO2004071129A2 (en) 2004-08-19
WO2004071129A3 WO2004071129A3 (en) 2004-10-21
WO2004071129B1 true WO2004071129B1 (en) 2005-09-15

Family

ID=32844924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MK2004/000001 WO2004071129A2 (en) 2003-02-07 2004-02-05 Multimedia loudspeaker

Country Status (1)

Country Link
WO (1) WO2004071129A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7826622B2 (en) 2003-05-27 2010-11-02 Harman International Industries, Incorporated Constant-beamwidth loudspeaker array
US7684574B2 (en) 2003-05-27 2010-03-23 Harman International Industries, Incorporated Reflective loudspeaker array
WO2006096801A2 (en) * 2005-03-08 2006-09-14 Harman International Industries, Incorporated Reflective loudspeaker array
CN106658278B (en) * 2016-11-30 2023-11-28 唐永均 Loudspeaker horn

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138594A (en) * 1977-06-02 1979-02-06 Klipsch And Associates, Inc. Small dimension low frequency folded exponential horn loudspeaker with unitary sound path and loudspeaker system including same
SE447438B (en) * 1981-11-26 1986-11-10 Stig Carlsson SPEAKERS
GB9902750D0 (en) * 1999-02-09 1999-03-31 New Transducers Ltd Loudspeakers
US20020018578A1 (en) * 2000-08-03 2002-02-14 Paul Burton Bending wave loudspeaker

Also Published As

Publication number Publication date
WO2004071129A3 (en) 2004-10-21
WO2004071129A2 (en) 2004-08-19

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