EP0714590B1 - Lautsprecher - Google Patents

Lautsprecher Download PDF

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Publication number
EP0714590B1
EP0714590B1 EP94923018A EP94923018A EP0714590B1 EP 0714590 B1 EP0714590 B1 EP 0714590B1 EP 94923018 A EP94923018 A EP 94923018A EP 94923018 A EP94923018 A EP 94923018A EP 0714590 B1 EP0714590 B1 EP 0714590B1
Authority
EP
European Patent Office
Prior art keywords
baffle
enclosure
drive unit
loudspeaker according
loudspeaker
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
EP94923018A
Other languages
English (en)
French (fr)
Other versions
EP0714590A1 (de
Inventor
Henry Azima
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.)
Centralforce Ltd
Original Assignee
Centralforce 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 Centralforce Ltd filed Critical Centralforce Ltd
Publication of EP0714590A1 publication Critical patent/EP0714590A1/de
Application granted granted Critical
Publication of EP0714590B1 publication Critical patent/EP0714590B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to loudspeakers and more particularly to loudspeakers of the kind comprising a box-like enclosure, which may be cuboid in shape or otherwise, housing one or more loudspeaker drive units.
  • Such de-coupling is desirable to prevent audible distortions due to unintended exitation of the baffle or due to unintended exitation of one drive unit, e.g. a tweeter, by another drive unit e.g. a mid/bass range drive unit, mounted on the same baffle.
  • De-coupling should not, however, be such as to hinder the direct coupling of the drive units via the enclosure to the stand, shelf or floor on which the loudspeaker is supported.
  • the present invention provides a loudspeaker enclosure having a baffle surrounding a drive unit, comprising means mounting the drive unit in the enclosure remote from the baffle.
  • the baffle may have a drive unit, e.g. a tweeter, directly mounted thereon, with the associated mid range and/or base drive unit(s) mounted remotely from the baffle.
  • the sole connection between one drive unit and the baffle is by way of resilient sealing means, e.g. a gasket.
  • one of the drive units may be mounted on the rear surface of the enclosure.
  • the said remotely mounted drive unit may be mounted on one or more, preferably several, pillars or columns projecting across the enclosure from its rear.
  • the pillars or columns are tapered so that they have the effect of assisting in breaking up standing waves within the enclosure.
  • the pillars or columns may be integral with the rear wall of the enclosure and may, for example, be moulded from a plastics material e.g. mica-filled polypropylene.
  • the tweeter may be mounted in position in the enclosure by trapping it between the baffle and one or more columns or pillars so that no separate fasteners are used.
  • At least one of the pillars or columns may also be used to support the baffle.
  • a loudspeaker comprises an enclosure consisting of a cuboid box-like cabinet 2 closed by a baffle 7, both of which are moulded from a plastics material such as mica-filled polypropylene.
  • the cabinet is formed internally with a series, e.g. four, of integral tapered pillars or columns 3 which project across the enclosure from its rear 9 and so that their free ends 12 are disposed in the vicinity of the front edge 11 of the enclosure 2.
  • the tapered shape of the pillars or columns 3 is useful in tending to break-up standing waves in the enclosure.
  • a low frequency drive unit 4 is mounted on the columns 3 by fasteners, e.g. screws 16 so as to be surrounded by, but spaced from, an aperture 13 in the baffle 7.
  • a resilient seal 5 is interposed between the drive unit 4 and the aperture 13 in the baffle 7 so that the drive unit 4 is decoupled from the baffle.
  • a resilient de-coupling seal 6 is interposed between the respective edges 10,11 of the baffle 7 and the cabinet 2 so that the baffle is decoupled from the enclosure.
  • a high frequency drive unit 8 is directly mounted to close an aperture 14 in the baffle 7 by means of fasteners, e.g. screws 15.
  • An electronic cross-over network 1 is mounted on the rear face 9 of the enclosure.
  • the arrangement described above not only produces a loudspeaker in which the main drive unit is acoustically de-coupled from the baffle but also has the advantage of easy assembly.
  • the speaker components can be dropped into place, perhaps robotically. Also some testing of the loudspeaker can be carried out before the baffle is attached.
  • the high frequency drive unit mounted on the front baffle ensures a rigid coupling to the stand or shelf. Also the fact that the paths for the two drive units are somewhat independent ensures at least one order of isolation between the high frequency and low frequency units while each is rigidly coupled to the floor.
  • the isolation of the low frequency drive unit from the front baffle reduces box colouration due to acoustic radiation from the baffle board.
  • the loudspeaker described above can thus be of improved performance compared to a speaker in which all of the drive units are mounted on a common baffle.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Claims (11)

  1. Lautsprecher, der ein Gehäuse (2) mit einer Schallschluckwand (7), das eine Betriebseinheit (4) umschließt, aufweist, gekennzeichnet durch Mittel (6) zum Abkoppeln der Schallschluckwand vom Gehäuse und durch Mittel (3, 5) zur Befestigung der Betriebseinheit (4) am Gehäuse (2) entfernt von der Schallschluckwand (7), so daß die Betriebseinheit (4) von der Schallschluckwand (7) abgekoppelt ist.
  2. Lautsprecher nach Anspruch 1, gekennzeichnet dadurch, daß die Betriebseinheit (4) eine Mittel- und/oder Tieffrequenzbetriebseinheit ist, und daß eine Hochfrequenzbetriebseinheit (8) direkt auf der Schallschluckwand (7) befestigt ist.
  3. Lautsprecher nach Anspruch 1 oder Anspruch 2, gekennzeichnet durch elastische Dichtungsmittel (5), die die Betriebseinheit an der Schallschluckwand abdichten und gleichzeitig beide getrennt voneinander halten.
  4. Lautsprecher nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, daß das Gehäuse (2) kastenförmig ist, daß die Schallschluckwand (7) die Vorderseite des Gehäuses bildet, daß das Gehäuse eine Rückwand (9) gegenüber der Vorderseite aufweist, und daß die Betriebseinheit (4) an der Rückwand des Gehäuses befestigt ist.
  5. Lautsprecher nach Anspruch 4, gekennzeichnet dadurch, daß die Betriebseinheit (4) auf mindestens einer Säule (3) montiert ist, die von der Rückwand (9) aus in das Gehäuse ragt.
  6. Lautsprecher nach Anspruch 5, gekennzeichnet dadurch, daß die oder jede Säule (3) entlang ihrer Länge abgeschrägt ist.
  7. Lautsprecher nach Anspruch 5 oder Anspruch 6, gekennzeichnet dadurch, daß die oder jede Säule (3) integral mit der Rückwand (9) des Gehäuses (2) verbunden ist.
  8. Lautsprecher nach einem der Ansprüche 2 bis 7, gekennzeichnet dadurch, daß die Hochfrequenzbetriebseinheit (8) an ihrer Position im Gehäuse so angebracht ist, daß sie zwischen der Schallschluckwand (7) und einer oder mehreren Säulen (3) klemmt.
  9. Lautsprecher nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, daß die Schallschluckwand (7) von einer oder mehreren Säulen (3) gehalten wird.
  10. Lautsprecher nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, daß die Schallschluckwand (7) und das Gehäuse (2) an ihren jeweiligen Kanten mittels einer elastischen Dichtung (6) gegeneinander abgedichtet sind, ohne einander direkt zu berühren.
  11. Lautsprecher nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, daß das Gehäuse (2) und/oder die Schallschluckwand (7) aus einem Kunststoffmaterial geformt sind.
EP94923018A 1993-08-20 1994-08-08 Lautsprecher Expired - Lifetime EP0714590B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9317345 1993-08-20
GB939317345A GB9317345D0 (en) 1993-08-20 1993-08-20 Loudspeaker
PCT/GB1994/001734 WO1995006397A1 (en) 1993-08-20 1994-08-08 Loudspeaker

Publications (2)

Publication Number Publication Date
EP0714590A1 EP0714590A1 (de) 1996-06-05
EP0714590B1 true EP0714590B1 (de) 1997-01-22

Family

ID=10740791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94923018A Expired - Lifetime EP0714590B1 (de) 1993-08-20 1994-08-08 Lautsprecher

Country Status (9)

Country Link
EP (1) EP0714590B1 (de)
CN (1) CN1129510A (de)
AU (1) AU7272694A (de)
CA (1) CA2165327A1 (de)
DE (1) DE69401593T2 (de)
DK (1) DK0714590T3 (de)
GB (1) GB9317345D0 (de)
HK (1) HK1000991A1 (de)
WO (1) WO1995006397A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5822443A (en) * 1996-04-22 1998-10-13 Samsung Electronics Co., Ltd. Speaker system for a television
AU756783B2 (en) 1998-06-22 2003-01-23 Slab Technology Limited Loudspeakers
JP2014078935A (ja) * 2012-09-18 2014-05-01 Yamaha Corp スピーカ装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2417909A1 (fr) * 1978-02-17 1979-09-14 Thaille Jean Louis Regulateur de pression (ou charge) acoustique
US4214645A (en) * 1978-11-09 1980-07-29 Avid Corporation Method of and means for loudspeaker sound wave distribution
JPS5910867Y2 (ja) * 1980-01-07 1984-04-04 パイオニア株式会社 車載用スピ−カユニツト
DE3201455C2 (de) * 1982-01-19 1985-09-19 Dieter 7447 Aichtal Wagner Lautsprecherbox
IT1187062B (it) * 1985-09-02 1987-12-16 S I P E Soc Italiana Prodotti Altoparlante multiplo,con "tweeter" piezoelettrico supportato con mezzi che consentono lo sfruttamento della membrana dell'altoparlante principale quale superficie riflettente della radiazione emessa posteriormente dal disco ceramico e dalla membrana dell"tweeter" piezoelettrico
FR2609853B1 (fr) * 1987-04-23 1989-04-21 Pillerault Clement Eloise Transducteur electroacoustique de puissance, a haute fidelite, a systeme de diffusion etage

Also Published As

Publication number Publication date
WO1995006397A1 (en) 1995-03-02
HK1000991A1 (en) 1998-05-15
DE69401593T2 (de) 1997-05-15
CA2165327A1 (en) 1995-03-02
EP0714590A1 (de) 1996-06-05
CN1129510A (zh) 1996-08-21
DK0714590T3 (da) 1997-08-04
DE69401593D1 (de) 1997-03-06
GB9317345D0 (en) 1993-10-06
AU7272694A (en) 1995-03-21

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