EP0362097A1 - Omnidirectional electroacoustic enclosure - Google Patents

Omnidirectional electroacoustic enclosure Download PDF

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Publication number
EP0362097A1
EP0362097A1 EP89450012A EP89450012A EP0362097A1 EP 0362097 A1 EP0362097 A1 EP 0362097A1 EP 89450012 A EP89450012 A EP 89450012A EP 89450012 A EP89450012 A EP 89450012A EP 0362097 A1 EP0362097 A1 EP 0362097A1
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EP
European Patent Office
Prior art keywords
box
transducer
revolution
omnidirectional
acoustic enclosure
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.)
Ceased
Application number
EP89450012A
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German (de)
French (fr)
Inventor
Alain Barbe
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.)
MUTEK SARL en liquidation
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MUTEK SARL en liquidation
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 MUTEK SARL en liquidation filed Critical MUTEK SARL en liquidation
Publication of EP0362097A1 publication Critical patent/EP0362097A1/en
Ceased 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
    • H04R1/32—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

  • the present invention relates to omnidirectional electro-acoustic speakers.
  • Omnidirectional electro-acoustic speakers are known, such as those described in the Certificate of Utility FR 2 242 830 comprising integral with circular plates the treble, medium and bass transducers arranged coaxially, the treble and medium transducers are oriented their membranes facing each other, said membranes being separated by a transverse circular partition generating with the holding plates two corridors whose periphery is open, each intended to diffuse the sound produced by the corresponding transducer in an omnidirectional manner, thanks to a diffuser arranged on each face of the partition having a convex shape of revolution aligned with the axis of the transducers.
  • the sound produced by the transducers thus diffused is of mediocre quality taking into account the mode of diffusion causing reflections on the plates and the partition of uncontrolled separation.
  • the object of the invention is to overcome the drawback previously explained.
  • the subject of the invention is an omnidirectional electro-acoustic enclosure comprising two bass / mid and treble transducers arranged coaxially with their membranes facing each other held on boxes, said enclosure is characterized in that the transducers are held one on the end of the extensions of its box and the other at the end of the box in the form of a trunk of regular pyramid or cone of revolution generating reflective surfaces making it possible to diffuse each part of the sounds emitted by the opposite transducer horizontally , the other part of the said sounds being dispersed horizontally by means of a deflec single sensor of convex shape of revolution arranged in alignment and between the transducers.
  • an enclosure according to the invention comprises an upper box 1 of parallelepiped shape whose faces at its lower part are extended by a regular pyramid trunk 2 at the end 3 and at the center of which the transducer 4 is held bass and midrange, the box 1 and its extension 2 constituting the tuning volume of the transducer 4 known per se.
  • the casing 1 Opposite the casing 1 is disposed a lower casing 5, the latter has a shape in a regular pyramid trunk with four sides whose axis extends the axis of the upper pyramid trunk 2 and that of the casing 1, the top or small base 6 oriented towards the transducer 4 receives the treble transducer 7, said transducers 4 and 7 are arranged coaxially with their membranes facing each other, said boxes 1 and 5 are kept spaced apart by means of uprights 8 for example.
  • a diffuser 9 of convex shape of revolution of piriform type is maintained in known manner as an extension of the axes of the transducers 4 and 7, it has an exponential conical shape of revolution 10 oriented towards the treble transducer 7 and a parabolic shape 11 oriented towards the bass / midrange transducer 4, the part of the sounds emitted by the transducers 4 and 7 and not diffused by the diffuser 9 is in turn reflected by the faces 12 of the lower box 5 for the bass / midrange and by the faces 13 of the extension 2 for the treble, the dispersion taking place horizontally around the periphery of the enclosure.
  • the base of the boxes 1 and 5 has a circular shape
  • the box 1 constituting the tuning volume of the bass / mid-range transducer 4 is cylindrical and its extension a truncated cone of revolution 15
  • the opposite box 5 supporting the transducer 7 is also a trunk of cone of revolution 17.
  • the base of the opposite caissons can have different regular shapes passing from the equilateral, square, polygonal triangular shape to the circular shape, the extensions corresponding to said bases being regular pyramid trunks or trunks of cone of revolution.
  • the opposite boxes can advantageously have different bases, in particular a square base for the upper box and a circular base for the lower box.

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  • 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)
  • Building Environments (AREA)

Abstract

Enceinte électro-acoustique omnidirectionnelle comportant deux t ransducteurs (4) pour les graves/médiums et (7) pour les aigus disposés de manière coaxiale leurs membranes se faisant face, le transducteur (4) est maintenu en l'extrémité des prolongements (2) d'un caisson (1) et le transducteur (7) en l'extrémité du caisson (5), une partie des sons émis par les transducteurs (4, 7) étant diffusés au moyen d'un diffuseur (9) placé entre les membranes, l'autre partie étant réfléchie sur les faces (12, 13) des caissons (1, 5).Omnidirectional electro-acoustic enclosure with two t ransductors (4) for bass / midrange and (7) for treble arranged coaxially with their membranes facing each other, the transducer (4) is held at the end of the extensions (2) of a box (1) and the transducer (7) at the end of the box (5), part of the sounds emitted by the transducers (4, 7) being diffused by means of a diffuser (9) placed between the membranes, the other part being reflected on the faces (12, 13) of the boxes (1, 5).

Description

La présente invention concerne les enceintes électro-acoustiques omnidirec­tionnelles.The present invention relates to omnidirectional electro-acoustic speakers.

On connaît les enceintes électro-acoustiques omnidirectionnelles telles que celles décrites dans le Certificat d'Utilité FR 2 242 830 comportant solidaires de plateaux circulaires les transducteurs des aigus, médiums et graves disposés de manière coaxiale, les transducteurs des aigus et médiums sont orientés leurs membranes se faisant face, lesdites membranes étant séparées par une cloison circulaire transversale engendrant avec les platines de maintien deux couloirs dont la périphérie est ouverte destiné chacun à diffuser le son produit par le trans­ducteur correspondant de manière omnidirectionnelle et ce grâce à un diffuseur disposé sur chaque face de la cloison présentant une forme convexe de révolution alignée avec l'axe des transducteurs. Le son produit par les transducteurs ainsi diffusé est de qualité médiocre compte tenu du mode de diffusion provoquant des réflexions sur les platines et la cloison de séparation non contrôlées.Omnidirectional electro-acoustic speakers are known, such as those described in the Certificate of Utility FR 2 242 830 comprising integral with circular plates the treble, medium and bass transducers arranged coaxially, the treble and medium transducers are oriented their membranes facing each other, said membranes being separated by a transverse circular partition generating with the holding plates two corridors whose periphery is open, each intended to diffuse the sound produced by the corresponding transducer in an omnidirectional manner, thanks to a diffuser arranged on each face of the partition having a convex shape of revolution aligned with the axis of the transducers. The sound produced by the transducers thus diffused is of mediocre quality taking into account the mode of diffusion causing reflections on the plates and the partition of uncontrolled separation.

L'invention a pour but de pallier à l'inconvénient précédemment exposé.The object of the invention is to overcome the drawback previously explained.

L'invention a pour objet une enceinte électro-acoustique omnidirectionnelle comportant deux transducteurs des graves/médiums et aigus disposés de manière coaxiale leurs membranes se faisant face maintenues sur des caissons, ladite enceinte est caractérisée en ce que les transducteurs sont maintenus l'un sur l'extrémité des prolongements de son caisson et l'autre en l'extrémité du caisson de forme en tronc de pyramide régulier ou de cône de révolution engendrant des surfaces réfléchissantes permettant de diffuser de manière horizontale chacun une partie des sons émis par le transducteur opposé, l'autre partie desdits sons étant dispersée de manière horizontale au moyen d'un déflec­ teur unique de forme convexe de révolution disposé dans l'alignement et entre les transducteurs.The subject of the invention is an omnidirectional electro-acoustic enclosure comprising two bass / mid and treble transducers arranged coaxially with their membranes facing each other held on boxes, said enclosure is characterized in that the transducers are held one on the end of the extensions of its box and the other at the end of the box in the form of a trunk of regular pyramid or cone of revolution generating reflective surfaces making it possible to diffuse each part of the sounds emitted by the opposite transducer horizontally , the other part of the said sounds being dispersed horizontally by means of a deflec single sensor of convex shape of revolution arranged in alignment and between the transducers.

D'autres caractéristiques et avantages de l'invention ressortiront plus clairement de la description qui va suivre faite en regard des dessins joints donnés à titre d'exemple non limitatif, où :

  • - la figure 1 est une vue en perspective d'une enceinte présentant des surfaces réfléchissantes en tronc de pyramide régulier,
  • - la figure 2, une variante d'une enceinte présentant des surfaces réfléchisssantes en tronc de cône régulier,
  • - la figure 3, une vue de face des enceintes représentées figures 1 et 2.
Other characteristics and advantages of the invention will emerge more clearly from the description which follows, given with regard to the accompanying drawings given by way of nonlimiting example, where:
  • FIG. 1 is a perspective view of an enclosure having reflecting surfaces in a regular pyramid trunk,
  • FIG. 2, a variant of an enclosure having reflective surfaces in a regular truncated cone,
  • - Figure 3, a front view of the speakers shown in Figures 1 and 2.

Tel que représenté figures 1 et 3, une enceinte selon l'invention comporte un caisson supérieur 1 de forme parallélépipèdique dont les faces en sa partie basse sont prolongées par un tronc de pyramide régulier 2 en extrémité 3 et au centre duquel est maintenu le transducteur 4 des graves et médiums, le caisson 1 et son prolongement 2 constituant le volume d'accord du transducteur 4 connu en soi.As shown in Figures 1 and 3, an enclosure according to the invention comprises an upper box 1 of parallelepiped shape whose faces at its lower part are extended by a regular pyramid trunk 2 at the end 3 and at the center of which the transducer 4 is held bass and midrange, the box 1 and its extension 2 constituting the tuning volume of the transducer 4 known per se.

Opposé au caisson 1 est disposé un caisson inférieur 5, ce dernier présente une forme en tronc de pyramide régulier à quatre côtés dont l'axe prolonge l'axe du tronc de pyramide supérieur 2 et celui du caisson 1, le sommet ou petite base 6 orienté vers le transducteur 4 reçoit le transducteur 7 des aigus, lesdits transducteurs 4 et 7 sont disposés de manière coaxiale leurs membranes se faisant face, lesdits caissons 1 et 5 sont maintenus écartés entre eux au moyen de montants 8 par exemple. Afin de diffuser de manière horizontale et omnidirectionnelle une partie des sons émis par les transducteurs 4 et 7, intermédiairement entre les membranes un diffuseur 9 de forme convexe de révolution de type piriforme est maintenu de manière connue en soi en prolon­gement des axes des transducteurs 4 et 7, il présente une forme de révolution conique exponentielle 10 orientée vers le transducteur des aigus 7 et une forme parabolique 11 orientée vers le transducteur des graves/médiums 4, la partie des sons émis par les transducteurs 4 et 7 et non diffusés par le diffuseur 9 est quant à elle réfléchie par les faces 12 du caisson inférieur 5 pour les gra­ves/médiums et par les faces 13 du prolongement 2 pour les aigus, la dispersion ayant lieu de manière horizontale sur le pourtour de l'enceinte.Opposite the casing 1 is disposed a lower casing 5, the latter has a shape in a regular pyramid trunk with four sides whose axis extends the axis of the upper pyramid trunk 2 and that of the casing 1, the top or small base 6 oriented towards the transducer 4 receives the treble transducer 7, said transducers 4 and 7 are arranged coaxially with their membranes facing each other, said boxes 1 and 5 are kept spaced apart by means of uprights 8 for example. In order to diffuse horizontally and omnidirectionally part of the sounds emitted by the transducers 4 and 7, intermediate between the membranes a diffuser 9 of convex shape of revolution of piriform type is maintained in known manner as an extension of the axes of the transducers 4 and 7, it has an exponential conical shape of revolution 10 oriented towards the treble transducer 7 and a parabolic shape 11 oriented towards the bass / midrange transducer 4, the part of the sounds emitted by the transducers 4 and 7 and not diffused by the diffuser 9 is in turn reflected by the faces 12 of the lower box 5 for the bass / midrange and by the faces 13 of the extension 2 for the treble, the dispersion taking place horizontally around the periphery of the enclosure.

Selon la variante représentée figure 2 et de manière à parfaire la dispersion omnidirectionnelle des sons non diffusés par le diffuseur 9, la base des caissons 1 et 5 présente une forme circulaire, le caisson 1 constituant le volume d'accord du transducteur 4 des graves/médiums est cylindrique et son prolongement un tronc de cône de révolution 15, le caisson opposé 5 support du transducteur 7 est lui aussi un tronc de cône de révolution 17.According to the variant shown in Figure 2 and so as to perfect the omnidirectional dispersion of sounds not broadcast by the diffuser 9, the base of the boxes 1 and 5 has a circular shape, the box 1 constituting the tuning volume of the bass / mid-range transducer 4 is cylindrical and its extension a truncated cone of revolution 15, the opposite box 5 supporting the transducer 7 is also a trunk of cone of revolution 17.

Il va de soi que la base des caissons opposés peut présenter différentes formes régulières passant de la forme triangulaire équilatérale, carrée, polygonale, à la forme circulaire, les prolongements correspondant auxdites bases étant des troncs de pyramide réguliers ou troncs de cône de révolution.It goes without saying that the base of the opposite caissons can have different regular shapes passing from the equilateral, square, polygonal triangular shape to the circular shape, the extensions corresponding to said bases being regular pyramid trunks or trunks of cone of revolution.

Sans sortir du cadre de l'invention les caissons opposés peuvent avantageusement présenter des bases différentes notamment une base carrée pour le caisson supérieur et une base circulaire pour le caisson inférieur.Without departing from the scope of the invention, the opposite boxes can advantageously have different bases, in particular a square base for the upper box and a circular base for the lower box.

Claims (5)

1°) Enceinte électro-acoustique omnidirectionnelle du type comportant deux transducteurs graves/médiums et aigus disposés et fixés de manière coaxiale leurs membranes se faisant face sur un caisson caractérisée en ce que le transducteur (4) des graves/médiums est maintenu en l'extrémité (3) du prolongement (2) du caisson (1) et le transducteur (7) des aigus en l'extrémité du caisson (5), le prolongement (2) du caisson (1) présentant une forme en tronc de pyramide régulier de même que le caisson (5) engendrant des surfaces réfléchisantes servant à diffuser de manière horizontale et omnidirectionnelle chacune une partie des sons émis par le transducteur opposé, l'autre partie des sons étant diffusée de manière horizontale et omnidirectionnelle au moyen d'un diffuseur (9) de forme convexe de révolution du type piriforme maintenu dans l'axe et entre les membranes des transducteurs (4, 7).1 °) Omnidirectional electro-acoustic enclosure of the type comprising two bass / mid and treble transducers arranged and coaxially fixed with their membranes facing each other on a box characterized in that the bass / mid transducer (4) is maintained in the end (3) of the extension (2) of the box (1) and the treble transducer (7) at the end of the box (5), the extension (2) of the box (1) having the shape of a regular pyramid trunk as well as the box (5) generating reflecting surfaces used to diffuse horizontally and omnidirectionally each part of the sounds emitted by the opposite transducer, the other part of the sounds being diffused horizontally and omnidirectionally by means of a diffuser (9) of convex shape of revolution of the piriform type maintained in the axis and between the membranes of the transducers (4, 7). 2°) Enceinte électro-acoustique omnidirectionnelle selon la revendication 1 caractérisée en ce que la base des caissons (1, 5) peut présenter une forme circulaire, le caisson (1) étant un cylindre et son prolongement un tronc de cône de révolution (15), le caisson (5) étant un tronc de cône de révolution (17).2) omnidirectional electro-acoustic enclosure according to claim 1 characterized in that the base of the boxes (1, 5) can have a circular shape, the box (1) being a cylinder and its extension a truncated cone of revolution (15 ), the box (5) being a truncated cone of revolution (17). 3°) Enceinte électro-acoustique omnidirectionnelle selon les revendications 1 et 2 caractérisée en ce que la base des caissons (1, 5) peut présenter différentes formes passant de la forme triangulaire équilatérale, carrée, polygonale, à la forme circulaire, les prolongements correspondant auxdites bases étant des troncs de pyramide réguliers ou des troncs de cône de révolution.3) omnidirectional electro-acoustic enclosure according to claims 1 and 2 characterized in that the base of the boxes (1, 5) can have different shapes passing from the equilateral, square, polygonal triangular shape to the circular shape, the corresponding extensions to said bases being regular pyramid trunks or trunks of cone of revolution. 4°) Enceinte électro-acoustique omnidirectionnelle selon les revendications 1 et 3 caractérisée en ce que les caissons opposés présentent des bases différentes.4 °) omnidirectional electro-acoustic enclosure according to claims 1 and 3 characterized in that the opposite caissons have different bases. 5°) Enceinte électro-acoustique omnidirectionnelle selon la revendication 1 caractérisée en ce que le diffuseur (9) présente une forme de révolution conique exponentielle (10) orientée vers le transducteur (7) des aigus et une forme parabolique (11) orientée vers le transducteur des graves/médiums (4).5 °) omnidirectional electro-acoustic enclosure according to claim 1 characterized in that the diffuser (9) has a form of exponential conical revolution (10) oriented towards the treble transducer (7) and a parabolic shape (11) oriented towards the bass / mid transducer (4).
EP89450012A 1988-09-29 1989-09-29 Omnidirectional electroacoustic enclosure Ceased EP0362097A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812930 1988-09-29
FR8812930A FR2637147B1 (en) 1988-09-29 1988-09-29 OMNIDIRECTIONAL ELECTROACOUSTIC SPEAKER

Publications (1)

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EP0362097A1 true EP0362097A1 (en) 1990-04-04

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EP89450012A Ceased EP0362097A1 (en) 1988-09-29 1989-09-29 Omnidirectional electroacoustic enclosure

Country Status (4)

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US (1) US5086871A (en)
EP (1) EP0362097A1 (en)
JP (1) JPH02223297A (en)
FR (1) FR2637147B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007449A1 (en) * 1990-10-17 1992-04-30 Canon Research Centre Europe Ltd Sound output device
AU653027B2 (en) * 1991-06-12 1994-09-15 Sonic Systems, Inc. Hemispherically wide-radiating-angle loudspeaker system
US10341761B2 (en) 2017-02-17 2019-07-02 Tymphany Hk Limited Acoustic waveguide for audio speaker

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US5525767A (en) * 1994-04-22 1996-06-11 Fields; Walter High-performance sound imaging system
US5657392A (en) * 1995-11-02 1997-08-12 Electronique Messina Inc. Multi-way speaker with a cabinet defining a midrange driver pyramidal compartment
DE29705406U1 (en) * 1997-03-25 1997-06-12 Bünzow, Hans-Dieter, Dipl.-Ing. (FH), 91054 Erlangen Housing for a loudspeaker
US5821470A (en) * 1997-04-08 1998-10-13 Meyer Sound Laboratories Incorporated Broadband acoustical transmitting system
US5847331A (en) * 1997-10-09 1998-12-08 Vollmer; Edward Omnidirectional loudspeaker
US6152257A (en) * 1998-05-05 2000-11-28 Thomas L. Denham Audio speaker
USD408035S (en) * 1998-06-20 1999-04-13 Denham Thomas L Audio speaker
US6431308B1 (en) 1998-12-11 2002-08-13 Edward G. Vollmer High fidelity small omnidirectional loudspeaker
JP2004072140A (en) * 2002-08-01 2004-03-04 Hiroshi China Omnidirectional back load horn speaker
US8068618B2 (en) * 2006-01-09 2011-11-29 Vollmer Edward G Spherical loudspeaker for omnipresent sound reproduction
JP6121699B2 (en) * 2012-11-28 2017-04-26 シャープ株式会社 Speaker system, control method, program, and recording medium
WO2014144968A1 (en) 2013-03-15 2014-09-18 O'polka Richard Portable sound system
US10149058B2 (en) 2013-03-15 2018-12-04 Richard O'Polka Portable sound system
USD740784S1 (en) 2014-03-14 2015-10-13 Richard O'Polka Portable sound device
JP6612344B2 (en) * 2015-06-30 2019-11-27 シャープ株式会社 Speaker system, display device, and television receiver
US11277684B2 (en) * 2019-01-17 2022-03-15 Onkyo Corporation Diffuser

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US3816672A (en) * 1970-07-06 1974-06-11 K Peter Sound reproduction system
LU69645A1 (en) * 1973-08-30 1974-07-10
BE894728A (en) * 1982-10-19 1983-02-14 Meyer Rudy De Loudspeaker box with tapering sound distributor unit - has geometrically-shaped housing with hole for speaker and distributor
WO1985001176A1 (en) * 1983-09-06 1985-03-14 Henry Oliver Wolcott Loudspeaker structure
US4588042A (en) * 1984-07-23 1986-05-13 Palet Timothy J Parabolic speaker

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LU69645A1 (en) * 1973-08-30 1974-07-10
BE894728A (en) * 1982-10-19 1983-02-14 Meyer Rudy De Loudspeaker box with tapering sound distributor unit - has geometrically-shaped housing with hole for speaker and distributor
WO1985001176A1 (en) * 1983-09-06 1985-03-14 Henry Oliver Wolcott Loudspeaker structure
US4588042A (en) * 1984-07-23 1986-05-13 Palet Timothy J Parabolic speaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007449A1 (en) * 1990-10-17 1992-04-30 Canon Research Centre Europe Ltd Sound output device
AU653027B2 (en) * 1991-06-12 1994-09-15 Sonic Systems, Inc. Hemispherically wide-radiating-angle loudspeaker system
US10341761B2 (en) 2017-02-17 2019-07-02 Tymphany Hk Limited Acoustic waveguide for audio speaker

Also Published As

Publication number Publication date
FR2637147A1 (en) 1990-03-30
US5086871A (en) 1992-02-11
JPH02223297A (en) 1990-09-05
FR2637147B1 (en) 1990-12-28

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