EP0649269B1 - Enceinte acoustique à diffusion étendue - Google Patents
Enceinte acoustique à diffusion étendue Download PDFInfo
- Publication number
- EP0649269B1 EP0649269B1 EP94490048A EP94490048A EP0649269B1 EP 0649269 B1 EP0649269 B1 EP 0649269B1 EP 94490048 A EP94490048 A EP 94490048A EP 94490048 A EP94490048 A EP 94490048A EP 0649269 B1 EP0649269 B1 EP 0649269B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- enclosure
- transducers
- box
- called
- transducer
- 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
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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
- H04R1/40—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
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
Definitions
- the invention relates to an acoustic enclosure with extended spatial diffusion.
- the invention also relates to an assembly comprising at least two enclosures produced in accordance with the invention.
- this set is one of two elements of a stereophonic reproduction group.
- acoustic speaker with wide spatial diffusion we include an enclosure which, relative to the enclosures classics which are called directional for a domain of determined frequencies, present at least in one sector angular determined in space, a certain omnidirectionality for the frequency domain considered.
- frequency domain determined, it will be understood in particular the domain of frequencies generated by acoustic transducers whether they are “medium”, “tweeters”, bass or broadband.
- the invention relates to an acoustic enclosure comprising at least two acoustic transducers, the emission axes are oriented in divergent directions in the angular sector considered of space.
- the so-called omnidirectional speakers known for a long time date are constituted by a chest comprising a wall which defines several external faces, including a front face, that is to say a face which, facing the listeners, is inscribed in an approximately semi-cylindrical envelope form and in which are arranged at least two cutouts at the periphery of each of which a acoustic transducer also internal to the boot.
- This enclosure architecture is generally reserved to so-called power speakers, such as speakers intended for the sound system of places in which the listeners are distributed in front of a stage on which each enclosure is placed, i.e. in cases where listeners are located in an angular sector of about a hundred eighty degrees, in front of any frontal point of the scene.
- phase differences which appear at at least one point of sector S, between wave fronts of acoustic signals which were emitted by the transducers.
- One of the results that the invention aims to obtain is precisely an enclosure that ensures the implementation acoustic phase of the different acoustic transducers that it entails by guaranteeing an increased distribution of sound pressure in relation to the speakers of the state of technical.
- the state of the art certainly includes a device (US-A-4,953,223) describing an acoustic enclosure whose transducers are, on the one hand, arranged in a column and, on the other hand, each orientable around the longitudinal axis of this column, but the orientation of these transducers does not sufficient to obtain the result targeted by the invention.
- the column of transducers of the document US-A-4.953.223 is a three-way speaker only consists of three spectral transducers different emission levels (treble, mid, bass), which is first vice for obtaining the result and, on the other hand, even on the assumption that the emission spectra of different transducers would overlap locally, nothing in the aforementioned area only indicates the situation of the points "point source base" that they contain is adjusted to the way of the invention.
- the subject of the invention is precisely an enclosure acoustic with wide spatial diffusion, which enclosure is characterized in that the different transducers on the axes privileged issues oriented in different directions, are arranged with their points called “source base point "located on a line, called base, which extends in a plane substantially median and perpendicular to that of the angular sector considered.
- the subject of the invention is also an assembly comprising at least two enclosures produced in accordance with the invention.
- an acoustic enclosure 1 with wide spatial diffusion i.e. an enclosure 1 which is qualified as omnidirectional at least in sector angular S of orientation defined in space, because it includes at least two acoustic transducers 2, for example, electro-acoustic, which, each having a 2A axis privileged acoustic emission, have emission spectra which overlap at least locally and are oriented in such a way that their preferred emission axes are as for them oriented in directions D1 to D4 different, especially divergent when observed projected in the angular sector S considered (figure 2).
- electro-acoustic which, each having a 2A axis privileged acoustic emission, have emission spectra which overlap at least locally and are oriented in such a way that their preferred emission axes are as for them oriented in directions D1 to D4 different, especially divergent when observed projected in the angular sector S considered (figure 2).
- the enclosure 1 consists of a trunk 3 comprising a wall 4 which defines several external faces, including one face front 5 (fully visible in Figure 1), i.e. a face intended to be turned towards listeners A1, A2 (symbolized in Figure 8) and in which are arranged at at least two cutouts 6 on the periphery of each of which connects an acoustic transducer 2 in addition essentially internal to the trunk 3.
- a trunk 3 comprising a wall 4 which defines several external faces, including one face front 5 (fully visible in Figure 1), i.e. a face intended to be turned towards listeners A1, A2 (symbolized in Figure 8) and in which are arranged at at least two cutouts 6 on the periphery of each of which connects an acoustic transducer 2 in addition essentially internal to the trunk 3.
- Each acoustic transducer 2 has a fictitious point remarkable 7 says "equivalent point source base", which point 7 is located, in particular axially at transducer, usually at a distance D beyond of the central front face 9A of a membrane 9 which the said transducer 2 ( Figure 3).
- point source base is actually an area fictitious from which the acoustic waves generated seem to be emitted by the transducer.
- point 7 has been represented in the center of a circle divided into quadrants.
- the transducers the enclosure are arranged substantially in a column 10 of axis 10A longitudinal approximately orthogonal to the said sector angular.
- sector S in which listening is carried out, is substantially horizontal because the listeners preferentially sit or stand and so they hold their heads substantially vertically, which determines the position of their ears.
- Axis 10A of column 10 is therefore considered approximately vertical.
- the various transducers with privileged emission axes 2A oriented in different directions D1 to D4 are arranged with their points 7 called "point source base" are located on a line L, called the base, which extends in a plane P substantially median and perpendicular to that of angular sector S considered.
- the transducers are each controlled by an external signal.
- FIG. 8 of the accompanying drawings shows that the enclosure acoustics of the invention provides acoustic tuning in all points of a sector S located in front of the enclosure.
- the fronts F of the acoustic waves emitted in phase by the various transducers of the enclosure the invention are perceived in the acoustic phase by an auditor located at any point in sector S located in front the enclosure.
- the acoustic wave fronts F were each symbolized by an arc of a circle whose center is the point "base of point source "from the transducer that generated it.
- the plane P which contains the baseline also contains the longitudinal axis 10A of the column 10.
- the so-called base line L is rectilinear.
- such an enclosure can be modularly constructed.
- the different boxes 11 which produce the same enclosure have, in their wall having the surfaces 12 support, at least one cutout 12A which constitutes a wide passage putting the internal volumes of the boxes 11 in communication.
- This last feature makes it possible to build a large volume speaker for bass reproduction frequencies with minimum attenuation and fidelity maximum.
- the enclosure constructed according to the invention applies particularly to quality sound systems in large rooms, but also to the creation of high installation fidelity or so-called "monitor" enclosure, ie enclosure benchmark for studios specializing in reproduction sounds.
- the wall 4 of the enclosure has been represented locally cylindrical of revolution, but this is only one simplification of representation and has no character limiting for the invention.
Description
- figure 1 : une vue de face d'une enceinte acoustique selon l'invention,
- figure 2 : une vue selon F de l'enceinte acoustique de la figure 1,
- figure 3 : une superposition de deux plans de coupes partielles A-A et B-B répertoriés en figure 1,
- figure 4 : une vue en coupe partielle selon IV IV et à plus grande échelle de l'enceinte acoustique de la figure 1.
- figure 5 : une vue en coupe partielle de la figure 1 selon un plan médian vertical,
- figures 6 et 7 : vus de dessus, deux dispositifs de l'état de la technique avec différents fronts d'ondes acoustiques émis par les transducteurs qu'ils comprennent, vers au moins un auditeur (A1, A2),
- figure 8 : vu de dessus, le dispositif de l'invention avec les fronts d'ondes acoustiques qu'il émet vers deux auditeurs (A1, A2).
- d'une part, de manière à produire des sons de fréquences situées dans un domaine défini et,
- d'autre part, à être en phase acoustique.
- en vue de l'appui sur un autre caisson, au moins une surface externe 12, dite d'appui, qui est approximativement orthogonale à la ligne L sur laquelle les points 7 dits "base de source ponctuelle" sont disposés et,
- en vue du port au moins indirect d'un transducteur 2, une surface 13, dite frontale, équipée d'une découpe 6 à laquelle se trouve raccordé ce transducteur 2, par ailleurs interne audit caisson, laquelle surface frontale 13 est approximativement parallèle à la ligne L de base dans sa fraction traversant ce caisson 11,
- en vue d'une orientation relative de chaque caisson par rapport à un autre, et ce, autour de la ligne de base L, au moins un élément d'un moyen 14 d'orientation et de positionnement à cet effet, comprenant deux éléments complémentaires.
- la surface frontale 13 de chaque caisson 11 est sensiblement plane et elle présente des bords 13A qui déterminent un quadrilatère rectangle,
- à cette surface frontale 13, en deux opposés de ses bords, se raccorde sensiblement une surface latérale 15 de forme d'enveloppe approximativement cylindrique de révolution,
- les différents caissons 11 d'un coffre d'enceinte ont, dans un plan parallèle à la surface d'appui 12 du caisson, sensiblement une même section et ce, de manière telle que, lorsqu'ils sont superposés, ils présentent leurs surfaces latérales 15 approximativement en continuité, cependant qu'ils sont orientés différemment pour présenter chacun leur surface frontale 13 dans une direction déterminée par rapport à au moins un autre caisson de l'enceinte,
- la découpe 6 réalisée dans chaque face frontale 13 pour constituer l'ouverture dans laquelle débouche un transducteur 2, à une position déterminée essentiellement par rapport à ceux de ses bords auxquels se raccorde la surface latérale 15, et ce, en fonction de l'orientation relative de chaque caisson par rapport à au moins un autre caisson 11 de l'enceinte.
Claims (9)
- Enceinte acoustique (1) à diffusion spatiale étendue, laquelle enceinte comprend au moins deux transducteurs acoustiques (2) qui, ayant chacun un axe (2A) privilégié d'émission acoustique, ont des spectres d'émission qui se recouvrent au moins localement et sont orientés de manière telle que leurs axes d'émission privilégiée sont quant à eux orientés dans des directions (D1 à D4) différentes, notamment divergentes lorsqu'elles sont observées en projection dans un secteur S angulaire d'orientation définie dans l'espace,les transducteurs étant disposés en une colonne (10) d'axe (10A) longitudinal approximativement orthogonal audit secteur angulaire S,chacun de ces transducteurs (2) présentant un point fictif remarquable (7) qui, dit "base de source ponctuelle équivalente", est situé, notamment axialement au transducteur, généralement à une certaine distance D au delà de la face avant (9A) d'une membrane (9) que comprend ledit transducteur (2),cette enceinte étant CARACTERISEE en ce que les différents transducteurs aux axes d'émission privilégiés (2A) orientés dans différentes directions (D1 à D4), sont disposés avec leurs points (7) dits "base de source ponctuelle" situés sur une ligne (L), dite de base, qui s'étend dans un plan (P) sensiblement médian et perpendiculaire à celui du secteur angulaire considéré (S).
- Enceinte acoustique selon la revendication 1 dont les transducteurs sont chacun commandés par un signal extérieur caractérisée en ce que les différents transducteurs sont commandés par un même signal :d'une part, de manière à produire des sons de fréquences situées dans un domaine défini et,d'autre part, à être en phase acoustique.
- Enceinte acoustique selon la revendication 1 ou 2 et constituée d'un coffre (3) comprenant une paroi (4) qui définit plusieurs faces externes, dont une face frontale (5), c'est à dire une face destinée à être tournée vers des auditeurs et dans laquelle sont aménagées au moins deux découpes (6) à la périphérie de chacune desquelles se raccorde un transducteur acoustique (2) par ailleurs essentiellement interne au coffre (3) caractérisée en ce que le coffre (3) de l'enceinte (1) est constitué d'au moins deux caissons (11) qui, abritant chacun un transducteur acoustique (2), présentent chacun :en vue de l'appui sur un autre caisson, au moins une surface externe (12), dite d'appui, qui est approximativement orthogonale à la ligne (L) sur laquelle les points (7) dits "base de source ponctuelle" doivent être disposés et,en vue du port au moins indirect d'un transducteur (2), une surface (13), dite frontale, équipée d'une découpe (6) à laquelle se trouve raccordé ce transducteur (2), par ailleurs interne audit caisson, laquelle surface frontale (13) est approximativement parallèle à la ligne (L) de base dans sa fraction traversant ce caisson (11).
- Enceinte acoustique selon l'une quelconque des revendications 1 à 3 caractérisée en ce qu'en vue d'une orientation relative de chaque caisson par rapport à un autre, et ce, autour de la ligne de base (L), au moins un élément d'un moyen (14) d'orientation et de positionnement à cet effet, comprenant deux éléments complémentaires.
- Enceinte acoustique selon l'une quelconque des revendications 1 à 4 caractérisée en ce que :la surface frontale (13) de chaque caisson (11) est sensiblement plane et elle présente des bords (13A) qui déterminent un quadrilatère rectangle,à cette surface frontale (13), en deux opposés de ses bords, se raccorde sensiblement une surface latérale (15) de forme d'enveloppe approximativement cylindrique de révolution.
- Enceinte acoustique selon l'une quelconque des revendications 1 à 5 caractérisée en ce que les différents caissons (11) d'un coffre d'enceinte ont, dans un plan parallèle à la surface d'appui (12) du caisson, sensiblement une même section et ce, de manière telle que, lorsqu'ils sont superposés, ils présentent leurs surfaces latérales (15) approximativement en continuité, cependant qu'ils sont orientés différemment pour présenter chacun leur surface frontale (13) dans une direction déterminée par rapport à au moins un autre caisson de l'enceinte.
- Enceinte acoustique selon l'une quelconque des revendications 1 à 6 caractérisée en ce que la découpe (6) réalisée dans chaque face frontale (13) pour constituer l'ouverture dans laquelle débouche un transducteur (2), à une position déterminée essentiellement par rapport à ceux de ses bords auxquels se raccorde la surface latérale (15), et ce, en fonction de l'orientation relative de chaque caisson par rapport à au moins un autre caisson (11) de l'enceinte.
- Enceinte acoustique selon l'une quelconque des revendications 1 à 7 caractérisée en ce que les différents caissons (11) qui réalisent une même enceinte comportent, dans leur paroi présentant les surfaces (12) d'appui, au moins une découpe (12A) qui constitue un large passage mettant les volumes internes des caissons (11) en communication.
- Ensemble comprenant au moins deux enceintes selon l'une quelconque des revendications 1 à 8 et de type produisant des sons dans des domaines de fréquences différents, caractérisé en ce que, pour constituer l'ensemble, les enceintes sont superposées de manière telle que les points de base (7) des transducteurs qu'elles comprennent, se situent sur une ligne (L) de base qui s'étend dans un plan (P) sensiblement médian et perpendiculaire à celui du secteur angulaire (S) dans lequel les enceintes sont présumées omnidirectionnelles.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9312534A FR2711299B1 (fr) | 1993-10-15 | 1993-10-15 | Enceinte acoustique à diffusion spatiale étendue. |
FR9312534 | 1993-10-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0649269A1 EP0649269A1 (fr) | 1995-04-19 |
EP0649269B1 true EP0649269B1 (fr) | 1999-12-08 |
Family
ID=9452060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94490048A Expired - Lifetime EP0649269B1 (fr) | 1993-10-15 | 1994-10-10 | Enceinte acoustique à diffusion étendue |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0649269B1 (fr) |
AT (1) | ATE187595T1 (fr) |
DE (1) | DE69421995T2 (fr) |
FR (1) | FR2711299B1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2736499B1 (fr) * | 1995-07-03 | 1997-09-12 | France Telecom | Procede de diffusion d'un son avec une directivite donnee |
US7936891B2 (en) | 2005-10-06 | 2011-05-03 | Henricksen Clifford A | Line array electroacoustical transducing |
US11095975B2 (en) * | 2019-08-16 | 2021-08-17 | Bose Corporation | Line array loudspeaker |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4764960A (en) * | 1986-07-18 | 1988-08-16 | Nippon Telegraph And Telephone Corporation | Stereo reproduction system |
US4953223A (en) * | 1988-09-08 | 1990-08-28 | Householder George G | Speaker mounting system |
DE9017150U1 (fr) * | 1990-12-19 | 1991-03-21 | Keplinger, Rainer, 8865 Hainsfarth, De |
-
1993
- 1993-10-15 FR FR9312534A patent/FR2711299B1/fr not_active Expired - Fee Related
-
1994
- 1994-10-10 EP EP94490048A patent/EP0649269B1/fr not_active Expired - Lifetime
- 1994-10-10 DE DE69421995T patent/DE69421995T2/de not_active Expired - Fee Related
- 1994-10-10 AT AT94490048T patent/ATE187595T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69421995T2 (de) | 2000-06-29 |
ATE187595T1 (de) | 1999-12-15 |
FR2711299A1 (fr) | 1995-04-21 |
EP0649269A1 (fr) | 1995-04-19 |
DE69421995D1 (de) | 2000-01-13 |
FR2711299B1 (fr) | 1995-12-08 |
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