EP0297008A1 - Very high performance acoustic enclosures - Google Patents
Very high performance acoustic enclosures Download PDFInfo
- Publication number
- EP0297008A1 EP0297008A1 EP88430015A EP88430015A EP0297008A1 EP 0297008 A1 EP0297008 A1 EP 0297008A1 EP 88430015 A EP88430015 A EP 88430015A EP 88430015 A EP88430015 A EP 88430015A EP 0297008 A1 EP0297008 A1 EP 0297008A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- enclosure
- loudspeakers
- channels
- enclosure according
- tubes
- 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.)
- Withdrawn
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000001413 cellular effect Effects 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 claims 1
- 229920006255 plastic film Polymers 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 239000010426 asphalt Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 239000006260 foam Substances 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 241000208140 Acer Species 0.000 description 1
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 210000003027 ear inner Anatomy 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
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
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
- H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
- H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
Definitions
- the present invention relates to very high performance loudspeakers.
- the technical sector of the invention is that of the construction of loudspeakers.
- One of these solutions consists in building double-walled enclosures and filling the intermediate space between the two walls with a powdery and dense material which is generally sand.
- Some manufacturers have constructed enclosures with a perforated wall or labyrinths formed on the back of the loudspeakers, made of wooden arrays delimiting cells which are lined with fibrous materials.
- An objective of the present invention is to provide high fidelity loudspeakers having very good qualities of reproduction thanks to new acoustic screens placed against the internal faces of the walls.
- Another objective of the invention is to further improve the quality of reproduction of the loudspeakers comprising said acoustic screens by means of absorbent blocks placed behind the loudspeakers.
- the acoustic speakers according to the invention are of the type comprising one or more speakers placed inside an enclosure.
- enclosures whose walls are lined internally by a screen made up of parallel tubes, which are substantially contiguous and which are filled with a solid material in the divided state which is preferably , sand, graphite or silica.
- the screen lining each wall is made up of parallel tubes which are connected together by flexible and deformable connecting elements with which they constitute a unitary piece.
- the tubes of the screens are arranged horizontally.
- an enclosure according to the invention further comprises, inside said enclosure, one or more insulating blocks composed of cellular material pierced with channels parallel to the axes of the loudspeakers.
- the subject of the invention is new high fidelity loudspeakers, which make it possible to obtain a very good quality of sound reproduction.
- the distortion as well as the coloring of the sounds are very reduced, because the vibrations of the walls of the enclosure are very attenuated, as well as the interference in the cavity on the back of the speakers.
- FIG. 1 represents an exploded view of part of an acoustic enclosure according to the invention.
- An acoustic enclosure according to the invention comprises a housing 1, which is shown with a rectangular shape, but which can have other shapes.
- the housing 1 delimits an internal cavity in which are placed one or more loudspeakers, visible in FIGS. 2 and 3, for example a loudspeaker for bass sounds 2, a loudspeaker for medium sounds 3 and a loudspeaker -speaker for treble 4, the speaker membranes being directed forward.
- loudspeakers visible in FIGS. 2 and 3, for example a loudspeaker for bass sounds 2, a loudspeaker for medium sounds 3 and a loudspeaker -speaker for treble 4, the speaker membranes being directed forward.
- the side walls, the top, the bottom and the rear wall of the housing comprise, going from the outside towards the inside, a wooden plate 5, which is for example a plywood plate made of birch or maple wood, having a thickness of 12 to 25 mm, then two layers 6 of an elastomeric coating, which is sprayed under pressure on the internal faces of the plates 5, then a plate 7 of amorphous bitumen having a thickness of the order of 5 mm.
- a wooden plate 5 which is for example a plywood plate made of birch or maple wood, having a thickness of 12 to 25 mm
- two layers 6 of an elastomeric coating which is sprayed under pressure on the internal faces of the plates 5
- a plate 7 of amorphous bitumen having a thickness of the order of 5 mm.
- the walls of the enclosure are lined internally by an absorbent and non-reflecting screen 8 which is composed of substantially contiguous parallel tubes, which are filled with a solid and dense material, in the state divided, for example, from sand, or particles of graphite or grains of silica.
- the material is strongly packed in the tubes during filling thereof, so that vibrations do not risk bringing additional settlements and voids.
- Figures 1 to 3 show a preferred example in which the tubes 9, which line the side walls, the top and the bottom, are horizontal and parallel to the axes of the loudspeakers, while the tubes 10 which line the bottom are horizontal and perpendicular to the axes of the loudspeakers.
- the tubes 9, 10 could be vertical or inclined.
- FIG. 1 represents an embodiment in which the screen which lines each flat wall is made up of a single piece of parallel tubes 9 or 10, which are connected together by a flexible and deformable film 11.
- the screens are shown in the deployed position in FIG. 1. When they are in place, as can be seen in FIG. 2, the tubes are juxtaposed by being contiguous or almost contiguous and the flexible connections 11 are folded.
- the flexible connections 11 can be formed by a continuous film or by ribbons which connect the tubes together.
- the tubes 9, 10 and the thin webs 11 are made of plastic and are cast or molded in one piece.
- the screens 8 have the function of absorbing the pressure waves which strike them and thus of reducing the vibration of the walls. In addition, they have an internal face made up of cylinder portions which has the effect of reducing the reflections of the acoustic waves and thus of reducing the interferences between the reflected waves which cause distortions of the sounds.
- Figures 1 to 3 show tubes having a circular section. It should be noted that this example is not limiting. The tubes can also have a flattened or oval section.
- Figure 1 shows an embodiment of an enclosure which further comprises a block 12 located inside the enclosure at the rear of the speakers.
- the block 12 is composed of three contiguous layers which are perpendicular to the axes of the loudspeakers. It comprises a front layer 12a and a rear layer 12b which are made of a dense cellular material with open cells, for example made of polyurethane foam having a density greater than 100 Kg / M3.
- the two layers 12a and 12b are crossed right through by channels 13 which are parallel to the axes x x ′ of the loudspeakers.
- the channels 13 of the rear layer are staggered relative to the channels of the front layer.
- the block 12 further comprises an intermediate layer 12c which is composed of a cellular material with open cells of low density, for example a polyurethane foam having a density equal to or less than 30 Kg / m3.
- an intermediate layer 12c which is composed of a cellular material with open cells of low density, for example a polyurethane foam having a density equal to or less than 30 Kg / m3.
- the ratio between the volume of the channels and the total volume of the layers 12a or 12b is between 50% and 70%.
- the block 12 of Figure 1 is fixed for example to the upper wall or to the lower wall of the enclosure.
- Figures 2 and 3 show another embodiment of an enclosure which has two blocks 141 and 142, which are located respectively at the rear of the low frequency speaker 2 and at the rear of the medium frequency speaker 3 and which are attached to them.
- blocks 141 and 142 are similar to that of block 12.
- the function of the blocks 12 or 141, 142 is to prevent the waves reflected by the rear wall or by the side walls from returning towards the front and from interfering by forming standing wave systems.
- FIG. 4 shows a horizontal section with partial cutaway of another embodiment of a block 15 of cellular material with open cells which is in one piece and which has both channels 16 which pass through the block in part and which are parallel to the axes xx ′ of the loudspeakers and horizontal channels 17, which are perpendicular to the previous ones, which are arranged transversely to the enclosure and which are located in intermediate planes between the planes containing the channels 16.
- the subject of the invention is not only the enclosures equipped with acoustic screens 8 according to the invention and, in addition, preferably blocks of cellular material 12, 141, 142 or 15, but also acoustic screens or prefabricated cellular blocks if these are delivered separately to allow the construction of enclosures according to the invention.
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)
Abstract
L'invention a pour objet des enceintes acoustiques à très hautes performances.Une enceinte selon l'invention comporte un boîtier contenant un ou plusieurs haut-parleurs.Les parois du boîtier comportent de l'extérieur vers l'intérieur une plaque (5) multiplis, une ou plusieurs couches (6) d'enduit élastomère, une plaque de bitume amorphe et des écrans acoustiques(8) composés de tubes parallèles (9), qui sont sensiblement jointifs et qui sont remplis d'un matériau solide à l'état divisé fortement tassé, par exemple de sable ou de particules de graphite ou de grains de silice. Les enceintes comportent, en outre, à l'arrière des haut-parleurs, un ou plusieurs blocs (12) en mousse cellulaire, percés de canaux (13) parallèles aux axes des haut-parleurs.Une application est la construction d'enceintes acoustiques à très haute fidélité.The subject of the invention is very high performance acoustic enclosures. An enclosure according to the invention comprises a box containing one or more loudspeakers. The walls of the box include from the outside to the inside a multi-ply plate (5) , one or more layers (6) of elastomeric coating, a sheet of amorphous bitumen and acoustic screens (8) composed of parallel tubes (9), which are substantially contiguous and which are filled with a material which is solid in the divided strongly packed, for example sand or graphite particles or silica grains. The loudspeakers also include, at the rear of the loudspeakers, one or more blocks (12) of cellular foam, pierced with channels (13) parallel to the axes of the loudspeakers. One application is the construction of loudspeakers at very high fidelity.
Description
La présente invention a pour objet des enceintes acoustiques à très hautes performances.The present invention relates to very high performance loudspeakers.
Le secteur technique de l'invention est celui de la construction des enceintes acoustiques.The technical sector of the invention is that of the construction of loudspeakers.
Les enceintes acoustiques traditionnelles contenant un ou plusieures haut-parleurs, sont soumises à des vibrations parasites dues aux oscillations de pression, qui sont engendrées par les haut-parleurs, notamment les haut-parleurs qui émettent les sons graves et les sons à moyenne fréquence. Ces oscillations de pression s'exercent sur les parois de l'enceinte et font vibrer celles-ci. De plus, elles subissent des réflexions multiples sur les parois d'où résultent des distorsions et des colorations des sons qui nuisent à la qualité de la reproduction musicale ou sonore.Traditional loudspeakers containing one or more loudspeakers are subjected to parasitic vibrations due to pressure oscillations, which are generated by the loudspeakers, in particular the loudspeakers which emit bass sounds and medium frequency sounds. These pressure oscillations are exerted on the walls of the enclosure and cause them to vibrate. In addition, they undergo multiple reflections on the walls which result in distortions and colorations of sounds that affect the quality of musical or sound reproduction.
Diverses solutions ont été proposées pour réduire l'absorption et la réflexion des sons les parois de l'enceinte.Various solutions have been proposed to reduce the absorption and reflection of sounds from the walls of the enclosure.
Une de ces solutions consiste à construire des enceintes à double paroi et à garnir l'espace intermédiaire entre les deux parois d'un matériau pulvérulent et dense qui est généralement du sable.One of these solutions consists in building double-walled enclosures and filling the intermediate space between the two walls with a powdery and dense material which is generally sand.
Cette solution a dû être abandonnée car elle était onéreuse du fait qu'elle obligeait à construire deux caissons et à comprimer au maximum du sable dans l'espace intermédiaire entre ceux-ci. De plus, sous l'effet des vibrations, le sable tend à se tasser, ce qui crée des vides qui peuvent former des cavités résonantes. Enfin, le sable utilisé est souvent humide et l'humidité risque d'entraîner des moisissures qui attaquent les parois de l'enceinte.This solution had to be abandoned because it was expensive because it required the construction of two caissons and to compress sand as much as possible in the space between them. In addition, under the effect of vibrations, the sand tends to settle, which creates voids which can form resonant cavities. Finally, the sand used is often damp and humidity risks causing mold which attacks the walls of the enclosure.
D'autres solutions consistent à tapisser les faces internes des parois de l'enceintede matelas fibreux tels que de la laine de verre ou de roche, du feutre, du molleton, mais l'absorption des sons due à ces matelas est relativement faible, notamment pour les sons graves.Other solutions consist of lining the internal faces of the walls of the enclosure of fibrous mattresses such as glass or rock wool, felt, fleece, but the absorption of sounds due to these mattresses is relatively low, in particular for bass sounds.
Un autre problème que l'on rencontre dans les enceintes acoustiques découle du fait que l'espace interne, qui se trouve à l'arrière des haut-parleurs est le siège d'interférences entre les ondes de pression dues aux déplacements arrière des membranes des haut-parleurs et des évents d'accord et les ondes réfléchies par les parois.Another problem encountered in loudspeakers arises from the fact that the internal space, which is at the rear of the loudspeakers, is the seat of interference between the pressure waves due to backward movement of the speaker membranes and tuning vents and the waves reflected from the walls.
Certains fabricants ont construit des enceintes comportant, à l'arrière des haut-parleurs, une paroi perforée ou des labyrintes formés de réseaux de bois délimitant des cellules qui sont garnies de matériaux fibreux.Some manufacturers have constructed enclosures with a perforated wall or labyrinths formed on the back of the loudspeakers, made of wooden arrays delimiting cells which are lined with fibrous materials.
Un objectif de la présente invention est ce procurer des enceintes acoustiques à haute fidélité ayant des très bonnes qualités de reproduction des grâce à de nouveaux écrans acoustiques placés contre les faces internes des parois.An objective of the present invention is to provide high fidelity loudspeakers having very good qualities of reproduction thanks to new acoustic screens placed against the internal faces of the walls.
Un autre objectif de l'invention est d'améliorer encore la qualité de reproduction des enceintes comportant lesdits écrans acoustiques au moyen de blocs absorbants placés à l'arrière des haut-parleurs.Another objective of the invention is to further improve the quality of reproduction of the loudspeakers comprising said acoustic screens by means of absorbent blocks placed behind the loudspeakers.
Les enceintes acoustiques selon l'invention sont du type comportant un ou plusieurs haut-parleurs placés à l'intérieur d'une enceinte.The acoustic speakers according to the invention are of the type comprising one or more speakers placed inside an enclosure.
Les objectifs de l'invention sont atteints au moyen d'enceintes dont les parois sont tapissées intérieurement par un écran composé de tubes parallèles, qui sont sensiblement jointifs et qui sont remplis d'un matériau solide à l'état divisé qui est, de préférence, du sable, du graphite ou de la silice.The objectives of the invention are achieved by means of enclosures whose walls are lined internally by a screen made up of parallel tubes, which are substantially contiguous and which are filled with a solid material in the divided state which is preferably , sand, graphite or silica.
Selon un mode de réalisation préférentiel, l'écran tapissant chaque paroi est constitué de tubes parallèles qui sont reliés entre eux par des éléments de liaison souples et déformables avec lesquels ils constituent une pièce unitaire.According to a preferred embodiment, the screen lining each wall is made up of parallel tubes which are connected together by flexible and deformable connecting elements with which they constitute a unitary piece.
Avantageusement, les tubes des écrans sont disposés horizontalement.Advantageously, the tubes of the screens are arranged horizontally.
Selon un mode de réalisation préférentiel, une enceinte selon l'invention comporte, en outre, à l'intérieur de ladite enceinte, un ou plusieurs blocs isolants composés d'un matériau cellulaire percé de canaux parallèles aux axes des haut-parleurs.According to a preferred embodiment, an enclosure according to the invention further comprises, inside said enclosure, one or more insulating blocks composed of cellular material pierced with channels parallel to the axes of the loudspeakers.
L'invention a pour objet de nouvelles enceintes acoustiques à haute fidélité, qui permettent d'obtenir une très bonne qualité de reproduction des sons. La distorsion ainsi que la coloration des sons sont très réduites, du fait que les vibrations des parois de l'enceinte sont très atténuées, ainsi que les interférences dans la cavité située à l'arrière des haut-parleurs.The subject of the invention is new high fidelity loudspeakers, which make it possible to obtain a very good quality of sound reproduction. The distortion as well as the coloring of the sounds are very reduced, because the vibrations of the walls of the enclosure are very attenuated, as well as the interference in the cavity on the back of the speakers.
La description suivante se réfère aux dessins annexés qui représentent, sans aucun caractère limitatif, des exemples de réalisation d'enceinte acoustiques selon l'invention.
- La figure 1 représente une vue éclatée en perspective des parois d'une enceinte selon l'invention.
- La figure 2 est une coupe verticale d'une enceinte selon l'invention.
- La figure 3 est une coupe horizontale selon III-III de la figure 2.
- La figure 4 est une coupe horizontale avec arrachement partiel d'un autre mode de réalisation d'un bloc absorbant selon l'invention.
- La figure 5 est une vue de face en perspective du boîtier d'une enceinte selon l'invention.
- FIG. 1 represents an exploded perspective view of the walls of an enclosure according to the invention.
- Figure 2 is a vertical section of an enclosure according to the invention.
- Figure 3 is a horizontal section on III-III of Figure 2.
- Figure 4 is a horizontal section with partial cutaway of another embodiment of an absorbent block according to the invention.
- Figure 5 is a perspective front view of the housing of an enclosure according to the invention.
La figure 1 représente une vue éclatée d'une partie d'une enceinte acoustique selon l'invention.FIG. 1 represents an exploded view of part of an acoustic enclosure according to the invention.
Pour la clarté du dessin, la paroi arrière, la paroi avant et les haut-parleurs ne sont pas représentés sur cette figure.For clarity of the drawing, the rear wall, the front wall and the speakers are not shown in this figure.
Une enceinte acoustique selon l'invention comporte un boîtier 1, qui est représenté avec une forme parallélépipédique, mais qui peut avoir d'autres formes.An acoustic enclosure according to the invention comprises a housing 1, which is shown with a rectangular shape, but which can have other shapes.
Le boîtier 1 délimite une cavité interne dans laquelle sont disposés un ou plusieurs haut-parleurs,visibles sur les figures 2 et 3, par exemple un haut-parleur pour les sons graves 2, un haut-parleur pour les sons moyens 3 et un haut-parleur pour les sons aigus 4, les membranes des haut-parleurs étant dirigées vers l'avant.The housing 1 delimits an internal cavity in which are placed one or more loudspeakers, visible in FIGS. 2 and 3, for example a loudspeaker for
Les parois latérales, le dessus, le fond et la paroi arrière du boîtier comportent, en allant de l'extérieur vers l'intérieur, une plaque de bois 5, qui est par exemple une plaque multiplis en bois de bouleau ou d'érable, ayant une épaisseur de 12 à 25 mm, puis deux couches 6 d'un enduit élastomère, qui est pulvérisé sous pression sur les faces internes des plaques 5, puis une plaque 7 de bitume amorphe ayant une épaisseur de l'ordre de 5 mm.The side walls, the top, the bottom and the rear wall of the housing comprise, going from the outside towards the inside, a
Selon une caractéristique essentielle de l'invention, les parois de l'enceinte sont tapissées intérieurement par un écran absorbant et non réfléchissant 8 qui est composé de tubes parallèle sensiblement jointifs, qui sont remplis d'un matériau solide et dense, à l'état divisé, par exemple de sable, ou de particules de graphite ou de grains de silice.According to an essential characteristic of the invention, the walls of the enclosure are lined internally by an absorbent and
Le matériau est fortement tassé dans les tubes lors du remplissage de ceux-ci, de sorte que les vibrations ne risquent pas d'amener des tassements supplémentaires et des vides.The material is strongly packed in the tubes during filling thereof, so that vibrations do not risk bringing additional settlements and voids.
Les figures 1 à 3 représentent un exemple préférentiel dans lequel les tubes 9, qui tapissent les parois latérales, le dessus et le dessous, sont horizontaux et parallèles aux axes des haut-parleurs, tandis que les tubes 10 qui tapissent le fond sont horizontaux et perpendiculaires aux axes des haut-parleurs.Figures 1 to 3 show a preferred example in which the
En variante, les tubes 9, 10 pourraient être verticaux ou inclinés.Alternatively, the
La figure 1 représente un mode de réalisation dans lequel l'écran qui tapisse chaque paroi plane est composé d'une seule pièce de tubes parallèles 9 ou 10, qui sont reliés entre eux par un film souple et déformable 11.FIG. 1 represents an embodiment in which the screen which lines each flat wall is made up of a single piece of
Les écrans sont représentés en position déployée sur la figure 1. Lorsqu'ils sont en place, comme on le voit sur la figure 2, les tubes sont juxtaposés en étant jointifs ou presque jointifs et les liaisons souples 11 sont repliées.The screens are shown in the deployed position in FIG. 1. When they are in place, as can be seen in FIG. 2, the tubes are juxtaposed by being contiguous or almost contiguous and the
Les liaisons souples 11 peuvent être constituées par un film continu ou par des rubans qui relient les tubes entre eux.The
Selon un mode de réalisation préférentiel, les tubes 9, 10 et les voiles minces 11 sont en matière plastique et sont coulés ou moulés d'une seule pièce.According to a preferred embodiment, the
Les écrans 8 ont pour fonction d'absorber les ondes de pression qui viennent les frapper et ainsi de réduire la vibration des parois. De plus, ils présentent une face interne constituée de portions de cylindre qui a pour effet de réduire les réflexions des ondes acoustiques et ainsi de réduire les interférences entre les ondes réfléchies qui provoquent des distorsions des sons.The
Les figures 1 à 3 représentent des tubes ayant une section circulaire. Il est précisé que cet exemple n'est pas limitatif. Les tubes peuvent également avoir une section aplatie ou ovale.Figures 1 to 3 show tubes having a circular section. It should be noted that this example is not limiting. The tubes can also have a flattened or oval section.
La figure 1 représente un mode de réalisation d'une enceinte qui comporte, en outre, un bloc 12 situé à l'intérieur de l'enceinte à l'arrière des haut-parleurs.Figure 1 shows an embodiment of an enclosure which further comprises a
Selon un mode de réalisation préférentiel, le bloc 12 est composé de trois couches accolées qui sont perpendiculaires aux axes des haut-parleurs. Il comporte une couche avant 12a et une couche arrière 12b qui sont en un matériau cellulaire dense à cellules ouvertes, par exemple en mousse de polyuréthane ayant une masse volumique supérieure à 100 Kg/M³.According to a preferred embodiment, the
Les deux couches 12a et 12b sont traversées de par en part par des canaux 13 qui sont parallèles aux axes x x′ des haut-parleurs. Les canaux 13 de la couche arrière sont décalés en quinconce par rapport aux canaux de la couche avant.The two
Le bloc 12 comporte, en outre, une couche intermédiaire 12c qui est composée d'un matériau cellulaire à cellules ouvertes de faible densité par exemple d'une mousse de polyuréthane ayant une masse volumique égale ou inférieure à 30 Kg/m³.The
Le rapport entre le volume des canaux et le volume total des couches 12a ou 12b est compris entre 50% et 70%.The ratio between the volume of the channels and the total volume of the
Le bloc 12 de la figure 1 est fixé par exemple à la paroi supérieure ou à la paroi inférieure de l'enceinte.The
Les figures 2 et 3 représentent un autre mode de réalisation d'une enceinte qui comporte deux blocs 14₁ et 14₂, qui sont situés respectivement à l'arrière du haut-parleur basse fréquence 2 et à l'arrière du haut-parleur moyenne fréquence 3 et qui sont fixés à ceux-ci.Figures 2 and 3 show another embodiment of an enclosure which has two
Dans ce mode de réalisation, il n'y a aucun bloc isolant à l'arrière du haut-parleur haute fréqueunce car un tel bloc n'est pas efficace pour les hautes fréquences. La structure des blocs 14₁ et 14₂ est analogue à celle du bloc 12.In this embodiment, there is no insulating block at the rear of the high-frequency speaker because such a block is not effective for high frequencies. The structure of
La fonction des blocs 12 ou 14₁, 14₂ est d'éviter que les ondes réfléchies par la paroi arrière ou par les parois latérales ne reviennent vers l'avant et n'interfèrent en formant des systèmes d'ondes stationnaires.The function of the
La figure 4 représente une coupe horizontale avec arrachement partiel d'un autre mode de réalisation d'un bloc 15 en matériau cellulaire à cellules ouvertes qui est d'une seule pièce et qui comporte à la fois des canaux 16 qui traversent le bloc de part en part et qui sont parallèles aux axes x x′ des haut-parleurs et des canaux horizontaux 17, qui sont perpendiculaires aux précédents, qui sont disposés transversalement à l'enceinte et qui sont situés dans des plans intermédiaires entre les plans contenant les canaux 16.4 shows a horizontal section with partial cutaway of another embodiment of a
L'invention a pour objet non seulement les enceintes équipées d'écran acoustiques 8 selon l'invention et, en outre, préférentiellement de blocs en matériau cellulaire 12, 14₁, 14₂ ou 15, mais également des écrans acoustiques ou des blocs cellulaires préfabriqués si ceux-ci sont livrés séparément pour permettre la construction d'enceintes selon l'invention.The subject of the invention is not only the enclosures equipped with
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8708845A FR2616994B1 (en) | 1987-06-22 | 1987-06-22 | HIGH PERFORMANCE ACOUSTIC SPEAKERS |
| FR8708845 | 1987-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0297008A1 true EP0297008A1 (en) | 1988-12-28 |
Family
ID=9352431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88430015A Withdrawn EP0297008A1 (en) | 1987-06-22 | 1988-06-17 | Very high performance acoustic enclosures |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4869340A (en) |
| EP (1) | EP0297008A1 (en) |
| FR (1) | FR2616994B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0669781A4 (en) * | 1992-07-23 | 1995-05-23 | Katsutoshi Tozawa | Speaker system. |
| FR2802051A1 (en) * | 1999-12-03 | 2001-06-08 | Acoustique Et Lutherie | Audio enclosure for two loudspeakers includes rigid framework with flexibly mounted panels to avoid transmission of vibration |
| WO2010046301A1 (en) * | 2008-10-20 | 2010-04-29 | Atlas Elektronik Gmbh | Submarine antenna |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714721A (en) * | 1990-12-03 | 1998-02-03 | Bose Corporation | Porting |
| US5689573A (en) * | 1992-01-07 | 1997-11-18 | Boston Acoustics, Inc. | Frequency-dependent amplitude modification devices for acoustic sources |
| US5298693A (en) * | 1992-06-11 | 1994-03-29 | Heijn Roland A | Speaker support stand |
| GB2301727A (en) * | 1995-05-19 | 1996-12-11 | B & W Loudspeakers | Interior of loudspeaker cabinet includes projections to prevent standing waves |
| US5949033A (en) * | 1996-10-30 | 1999-09-07 | Sony Corporation | Constrained layer damped loudspeaker enclosure |
| US6808044B1 (en) * | 2000-08-04 | 2004-10-26 | Anthony T. Barbetta | Lightweight loudspeaker enclosure |
| US6719092B1 (en) * | 2000-08-04 | 2004-04-13 | Anthony T. Barbetta | Lightweight loudspeaker enclosure |
| IT1315163B1 (en) * | 2000-12-29 | 2003-02-03 | Alessandro Copetti | SOUND DIFFUSER AND METHOD FOR ITS REALIZATION |
| US8356689B2 (en) * | 2001-08-06 | 2013-01-22 | Harman International Industries, Inc. | Structure for the compositely formed sound box |
| US6571909B1 (en) | 2001-08-31 | 2003-06-03 | Jeffrey Olinger | Loudspeaker enclosure |
| US7093688B2 (en) * | 2001-09-05 | 2006-08-22 | Samsung Electronics Co., Ltd. | Structure for preventing the generation of standing waves and a method for implementing the same |
| US6763117B2 (en) | 2001-09-27 | 2004-07-13 | Barry Goldslager | Speaker enclosure |
| DE10149518A1 (en) * | 2001-10-08 | 2003-04-10 | Kolja Willimzik | Electroacoustic device for conversion of electrical signals into acoustic signals comprises electrodynamic converter(s) whose drive is coupled to an element with a mass equal to at least 100 times the converter mass |
| US6913110B1 (en) * | 2002-08-05 | 2005-07-05 | Southern California Sound Image | Lightweight speaker enclosure |
| JPWO2006022199A1 (en) * | 2004-08-23 | 2008-05-08 | 松下電器産業株式会社 | Speaker device |
| US8630435B2 (en) * | 2008-08-08 | 2014-01-14 | Nokia Corporation | Apparatus incorporating an adsorbent material, and methods of making same |
| US8292023B2 (en) * | 2009-02-13 | 2012-10-23 | Nokia Corporation | Enclosing adsorbent material |
| US8857559B2 (en) * | 2011-06-14 | 2014-10-14 | Chris Reviel | Speaker cabinet and method for fabrication |
| US8807269B1 (en) | 2012-01-09 | 2014-08-19 | Brian Lucy | Loudspeaker enclosure |
| US8985268B2 (en) | 2013-05-31 | 2015-03-24 | David A. Wilson | Speaker enclosure frame |
| TWI536850B (en) * | 2013-07-29 | 2016-06-01 | 雅瑟音響股份有限公司 | Speaker enclosure and method for fabricating the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2363956A1 (en) * | 1976-09-03 | 1978-03-31 | Sony Corp | ACOUSTIC SPEAKER |
| DE2930069A1 (en) * | 1979-07-25 | 1981-02-05 | Deutsche Forsch Luft Raumfahrt | Loudspeaker mounting - with casing and diaphragm cage made of specified fibre reinforced plastic |
| DE8604066U1 (en) * | 1986-02-15 | 1986-06-26 | Linke, Heinrich, 2000 Hamburg | Insert part for loudspeaker boxes to achieve a low-vibration housing |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1912454A (en) * | 1932-03-03 | 1933-06-06 | William H Hutter | Acoustic apparatus |
| US2986228A (en) * | 1957-05-08 | 1961-05-30 | Rca Corp | Miniature reverberation chamber system |
| US4591020A (en) * | 1980-02-04 | 1986-05-27 | Hruby Jr John O | Loudspeaker enclosure with isolation of loudspeaker vibration |
| JPS57116494A (en) * | 1981-01-09 | 1982-07-20 | Matsushita Electric Ind Co Ltd | Box for speaker |
| JPS56165487A (en) * | 1981-01-26 | 1981-12-19 | Sony Corp | Cabinet for acoustic machinery |
| JPS57155893A (en) * | 1981-03-20 | 1982-09-27 | Matsushita Electric Ind Co Ltd | Speaker system |
| JPS60186191A (en) * | 1984-03-06 | 1985-09-21 | Mitsubishi Electric Corp | Speaker device |
| JPS61150494A (en) * | 1984-12-24 | 1986-07-09 | Onkyo Corp | Cabinet for speaker |
| GB8503389D0 (en) * | 1985-02-09 | 1985-03-13 | B & W Loudspeakers | Loudspeaker enclosures |
-
1987
- 1987-06-22 FR FR8708845A patent/FR2616994B1/en not_active Expired
-
1988
- 1988-06-17 US US07/208,993 patent/US4869340A/en not_active Expired - Fee Related
- 1988-06-17 EP EP88430015A patent/EP0297008A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2363956A1 (en) * | 1976-09-03 | 1978-03-31 | Sony Corp | ACOUSTIC SPEAKER |
| DE2930069A1 (en) * | 1979-07-25 | 1981-02-05 | Deutsche Forsch Luft Raumfahrt | Loudspeaker mounting - with casing and diaphragm cage made of specified fibre reinforced plastic |
| DE8604066U1 (en) * | 1986-02-15 | 1986-06-26 | Linke, Heinrich, 2000 Hamburg | Insert part for loudspeaker boxes to achieve a low-vibration housing |
Non-Patent Citations (5)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN, vol. 10, no. 352 (E-458)[2408], 27 novembre 1986, page 35 E 458; & JP-A-61 150 494 (ONKYO CORP.) 09-07-1986 * |
| PATENT ABSTRACTS OF JAPAN, vol. 6, no. 211 (E-137)[1089], 23 octobre 1982, page 136 E 137; & JP-A-57 116 494 (MATSUSHITA DENKI SANGYO K.K.) 20-07-1982 * |
| PATENT ABSTRACTS OF JAPAN, vol. 6, no. 259 (E-149)[1137], 17 décembre 1982, page 68 E 149; & JP-A-57 155 893 (MATSUSHITA DENKI SANGYO K.K.) 27-09-1982 * |
| PATENT ABSTRACTS OF JAPAN, vol. 6, no. 52 (E-100)[930], 7 avril 1982, page 118 E 100; & JP-A-56 165 487 (SONY K.K.) 19-12-1981 * |
| PATENT ABSTRACTS OF JAPAN;, vol. 10, no. 27 (E-378)[2084], 4 février 1986, page 94 E 378; & JP-A-60 186 191 (MITSUBISHI DENKI K.K.) 21-09-1985 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0669781A4 (en) * | 1992-07-23 | 1995-05-23 | Katsutoshi Tozawa | Speaker system. |
| EP0669781A1 (en) * | 1992-07-23 | 1995-08-30 | TOZAWA, Katsutoshi | Speaker system |
| FR2802051A1 (en) * | 1999-12-03 | 2001-06-08 | Acoustique Et Lutherie | Audio enclosure for two loudspeakers includes rigid framework with flexibly mounted panels to avoid transmission of vibration |
| WO2010046301A1 (en) * | 2008-10-20 | 2010-04-29 | Atlas Elektronik Gmbh | Submarine antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| US4869340A (en) | 1989-09-26 |
| FR2616994A1 (en) | 1988-12-23 |
| FR2616994B1 (en) | 1989-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0297008A1 (en) | Very high performance acoustic enclosures | |
| US6411721B1 (en) | Audio speaker with harmonic enclosure | |
| WO2003071043A1 (en) | Device for fixing a sound-proofing panel on a wall | |
| EP3039672B1 (en) | Acoustic panel | |
| JP3637419B2 (en) | Speaker system | |
| EP0138712A2 (en) | Sound absorbing building block with sequential cavities | |
| EP0604450B1 (en) | Loudspeaker with an enclosure having a hexagonal prism shape | |
| WO2004053246A1 (en) | Double-wall acoustic panel | |
| FR2499346A1 (en) | ELECTRO-ACOUSTIC REPRODUCTION EFFECT SYSTEM | |
| CA3216884A1 (en) | Perforated devices and glazings comprising same | |
| US3712411A (en) | Loud speaker cabinet | |
| FR2462522A1 (en) | Demountable noise barrier panel - uses lead membrane sandwiched between elastic sound absorbing material and is clad with aluminium sheet with reception face perforated | |
| US6870942B1 (en) | Loudspeaker for line array sound system | |
| CA2757170A1 (en) | Acoustic panel for receiving, emitting or absorbing sounds | |
| FR2466163A1 (en) | Loudspeaker cabinet with external tweeter - has walls made from two types of wood of differing resonances, and tweeter mounted on upper panel via cellular foam | |
| BE1017303A6 (en) | PASSIVE SOUND ABSORBER FOR ACOUSTIC CORRECTION WITHIN A BUILDING. | |
| FR2933430A1 (en) | SELF-SUPPORTING ACOUSTIC INSULATION WALL | |
| FR2581106A1 (en) | Insulating self-supporting structure, particularly for acoustic insulation and method for its manufacture | |
| EP4172448A1 (en) | Sound spacer | |
| EP0728877A1 (en) | Element for acoustical insulation and noise insulation wall made of the same | |
| WO1999034641A1 (en) | Acoustic tunnel | |
| FR2652978A1 (en) | Acoustic enclosure | |
| JPH11220787A (en) | Loud speaker system | |
| FR2618284A1 (en) | Acoustic enclosure with high musical definition | |
| FR2770364A1 (en) | Loudspeaker enclosure for mounting several speakers in vertical column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE ES GB IT LI NL SE |
|
| 17P | Request for examination filed |
Effective date: 19890301 |
|
| 17Q | First examination report despatched |
Effective date: 19920331 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19920930 |