EP0951200A2 - Tubular loudspeaker enclosure - Google Patents
Tubular loudspeaker enclosure Download PDFInfo
- Publication number
- EP0951200A2 EP0951200A2 EP98402631A EP98402631A EP0951200A2 EP 0951200 A2 EP0951200 A2 EP 0951200A2 EP 98402631 A EP98402631 A EP 98402631A EP 98402631 A EP98402631 A EP 98402631A EP 0951200 A2 EP0951200 A2 EP 0951200A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- extruded
- tube
- acoustic enclosure
- enclosure according
- profile
- 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- Withdrawn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
- 239000003190 viscoelastic substance Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002023 wood Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 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
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—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
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
- H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
-
- 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 the field loudspeakers.
- An acoustic enclosure is usually constituted by a rigid box placed on a base and having at least one cutout corresponding to a speaker.
- the box is made up of an assembly wooden faces or equivalent materials.
- a quality essential of an enclosure is its mechanical rigidity. Assembly therefore requires great care in its execution, to avoid any inhomogeneity and any faulty source of vibration or poor transmission some efforts.
- the object of the present invention is to remedy this drawback by proposing a method of manufacturing and a structure to avoid stiffness defects.
- the invention relates to a acoustic enclosure including the box consisting of a profiled in an extruded material, in particular a tube extruded.
- the profile extruded is at least 5 times longer to the section.
- the extruded profile is made of aluminum, for example to form an extruded aluminum tube.
- the extruded profile is made of steel, for example a extruded steel tube.
- the extruded profile is made of plastic by example an extruded plastic tube.
- a viscoelastic material is provided inside the tube.
- the tube is covered with an acoustic fabric sleeve.
- the enclosure according to the invention consists of an assembly of several tuned tubes.
- tube is meant an element having any constant section, closed or not.
- FIG. 1 and 2 having the general shape of a very thin column, square section. It consists of an extruded tube (4) aluminum.
- This extruded tube (4) has a square section of 125 mm side and 2.5 mm thick.
- the length of the tube is 1040 mm.
- the rear corners of the tube (4) are reinforced by 10 mm "L" angle brackets (5) and 1.5 mm thick. These brackets (5) are kept on the extruded tube (4) by gluing.
- the front face of the extruded tube (4) is covered with a facade (7) made of natural wood or in reconstituted wood such as "medium".
- This facade (7) has a thickness of 31 mm. It supports midrange (8), treble (9) and bass speakers (10).
- the front (7) is fixed to the extruded tube by collage.
- Midrange (8) and treble speakers (9) are in a closed compartment separate from the bass reflex load.
- Vibration damping of the extruded tube (7) is made using viscoelastic materials (6, 4) glued to the inside and outside of the tube.
- the viscoelastic material is advantageously constituted by sheets of a material based on elastomeric bitumen with a thickness of approximately 3 millimeters inside, and with a thickness of the order 1.5 mm on the outside.
- a 5 kg steel ballast, fixed to the base (12) ensures the stability of the enclosure.
- Figure 3 shows a second example of achievement.
- the enclosure is formed by assembling two tubes (21, 22) juxtaposed.
- the lower part is bass reflex type and has a vent (23).
- the walls separating the two tubes (21, 22) are pierced by lights (24, 25) providing a path acoustic between the woofer (10) and the vent (23).
- Partitions (26, 27) separate the part bottom of the enclosure, and the top containing the tweeters (9) and midrange (8).
- the upper part (28) of the extruded tube rear (22) is filled with viscoelastic material providing vibration damping.
Abstract
Description
La présente invention concerne le domaine des enceintes acoustiques. Une enceinte acoustique est habituellement constituée par un caisson rigide posé sur un socle et présentant au moins une découpe correspondant à un haut-parleur.The present invention relates to the field loudspeakers. An acoustic enclosure is usually constituted by a rigid box placed on a base and having at least one cutout corresponding to a speaker.
Le caisson est constitué par un assemblage de faces en bois ou matériaux équivalents. Une qualité essentielle d'une enceinte est sa rigidité mécanique. L'assemblage nécessite de ce fait un grand soin dans son exécution, pour éviter toute inhomogénéité et tout défaut source de vibration ou de mauvaise transmission des efforts.The box is made up of an assembly wooden faces or equivalent materials. A quality essential of an enclosure is its mechanical rigidity. Assembly therefore requires great care in its execution, to avoid any inhomogeneity and any faulty source of vibration or poor transmission some efforts.
On a également proposé dans l'art antérieur de fabriquer des caissons par moulage d'un matériau tel que du béton.It has also been proposed in the prior art to manufacture boxes by molding a material such than concrete.
Il est apparu que l'industrialisation de tels enceintes se traduisait inévitablement par des défauts mécaniques entraínant une dégradation de la qualité acoustique. Pour éviter ces défauts, une fabrication artisanale peut certes être envisagée, mais elle se traduit par un coût rédhibitoire.It appeared that the industrialization of such speakers inevitably resulted in mechanical defects resulting in degradation of the acoustic quality. To avoid these faults, a handcrafted can certainly be considered, but it results in a prohibitive cost.
Le but de la présente invention est de remédier à cet inconvénient, en proposant un procédé de fabrication et une structure permettant d'éviter les défauts de rigidité.The object of the present invention is to remedy this drawback by proposing a method of manufacturing and a structure to avoid stiffness defects.
A cet effet, l'invention concerne une enceinte acoustique dont le caisson constitué par un profilé en un matériau extrudé, notamment un tube extrudé.To this end, the invention relates to a acoustic enclosure including the box consisting of a profiled in an extruded material, in particular a tube extruded.
La fabrication d'un caisson par extrusion présente l'avantage d'un faible coût de fabrication et d'une grande rigidité mécanique, dans la mesure où ce mode de fabrication évite tout assemblage d'éléments séparés.The manufacture of a box by extrusion has the advantage of low manufacturing cost and of great mechanical rigidity, insofar as this manufacturing method avoids any assembly of elements separated.
Selon une variante préférée, le profilé extrudé présente une longueur au moins 5 fois supérieure à la section.According to a preferred variant, the profile extruded is at least 5 times longer to the section.
Selon un premier mode de réalisation, le profilé extrudé est réalisé en aluminium, par exemple pour former un tube extrudé en aluminium.According to a first embodiment, the extruded profile is made of aluminum, for example to form an extruded aluminum tube.
Selon un deuxième mode de réalisation, le profilé extrudé est réalisé en acier, par exemple un tube extrudé en acier.According to a second embodiment, the extruded profile is made of steel, for example a extruded steel tube.
Selon un troisième mode de réalisation, le profilé extrudé est réalisé en un matière plastique par exemple un tube extrudé en matière plastique.According to a third embodiment, the extruded profile is made of plastic by example an extruded plastic tube.
De préférence, un matériau viscoélastique est prévu à l'intérieur du tube.Preferably a viscoelastic material is provided inside the tube.
Selon un variante particulière, le tube est revêtu d'un manchon en tissu acoustique.According to a particular variant, the tube is covered with an acoustic fabric sleeve.
Selon une autre variante, l'enceinte selon l'invention est constituée par un assemblage de plusieurs tubes accordés.According to another variant, the enclosure according to the invention consists of an assembly of several tuned tubes.
Par tube, on entendra un élément présentant une section constante quelconque, fermée ou non.By tube is meant an element having any constant section, closed or not.
L'invention sera mieux comprise à la lecture de la description qui suit, se référant aux dessins annexés concernant des exemples non limitatifs de réalisation, où :
- la figure 1 représente une vue éclatée d'un premier exemple de réalisation ;
- la figure 2 représente une vue de coté de l'enceinte ;
- la figure 3 représente une vue en coupe d'un deuxième exemple de réalisation.
- Figure 1 shows an exploded view of a first embodiment;
- Figure 2 shows a side view of the enclosure;
- Figure 3 shows a sectional view of a second embodiment.
L'exemple de réalisation d'une enceinte selon l'invention représentée en figure 1 et 2 présentant la forme générale d'une colonne très fine, de section carrée. Elle est constituée par un tube extrudé (4) en aluminium. Ce tube extrudé (4) présente une section carrée de 125 mm de côté et de 2,5 mm d'épaisseur. La longueur du tube est de 1040 mm. Les angles arrière du tube (4) sont renforcés par des équerres (5) en "L" de 10 mm de côté, et de 1,5 mm d'épaisseur. Ces équerres (5) sont maintenues sur le tube extrudé (4) par collage.The example of an enclosure according to the invention shown in Figure 1 and 2 having the general shape of a very thin column, square section. It consists of an extruded tube (4) aluminum. This extruded tube (4) has a square section of 125 mm side and 2.5 mm thick. The length of the tube is 1040 mm. The rear corners of the tube (4) are reinforced by 10 mm "L" angle brackets (5) and 1.5 mm thick. These brackets (5) are kept on the extruded tube (4) by gluing.
La face avant du tube extrudé (4) est recouverte d'une façade (7) réalisée en bois naturel ou en bois reconstitué tels que du "médium". Cette façade (7) présente une épaisseur de 31 mm. Elle supporte les haut-parleurs de médium (8), d'aigus (9) et de graves (10). La façade (7) est fixé sur le tube extrudé par collage.The front face of the extruded tube (4) is covered with a facade (7) made of natural wood or in reconstituted wood such as "medium". This facade (7) has a thickness of 31 mm. It supports midrange (8), treble (9) and bass speakers (10). The front (7) is fixed to the extruded tube by collage.
Les haut-parleurs de médium (8) et d'aigus (9) se trouvent dans un compartiment clos séparé de la charge bass-reflex.Midrange (8) and treble speakers (9) are in a closed compartment separate from the bass reflex load.
L'amortissement vibratoire du tube extrudé (7) est réalisé à l'aide de matériaux viscoélastiques (6, 4) collés à l'intérieur et à l'extérieur du tube.Vibration damping of the extruded tube (7) is made using viscoelastic materials (6, 4) glued to the inside and outside of the tube.
Le matériau viscoélastique est avantageusement constitué par des feuille d'un matériau à base de bitume élastomère d'une épaisseur d'environ 3 millimètres à l'intérieur, et d'une épaisseur de l'ordre de 1,5 mm à l'extérieur.The viscoelastic material is advantageously constituted by sheets of a material based on elastomeric bitumen with a thickness of approximately 3 millimeters inside, and with a thickness of the order 1.5 mm on the outside.
Des chenaux en médium (3) de 12 mm d'épaisseur, collés à chaque extrémité du tube (4), permettent de réaliser l'assemblage par vis à bois des capots intermédiaires (2) et du socle (12). Le capot décoratif (1) est maintenu sur le capot intermédiaire (2) par du ruban agrippant.12 mm medium channels (3) thick, glued to each end of the tube (4), allow the assembly by wood screws of intermediate covers (2) and of the base (12). The hood decorative (1) is held on the intermediate cover (2) by gripping tape.
Un lest en acier de 5 kg, solidaire du socle (12) assure la stabilité de l'enceinte. A 5 kg steel ballast, fixed to the base (12) ensures the stability of the enclosure.
L'habillage du tube extrudé d'un manchon (20) en tissu acoustique de type "Jersey" (nom commercial) ne laissant apparaítre que le capot (1) et le socle (12), réalisés en bois naturel.The covering of the extruded tube of a sleeve (20) in "Jersey" type acoustic fabric (name commercial) showing only the cover (1) and the base (12), made of natural wood.
La figure 3 représente d'un deuxième exemple de réalisation. L'enceinte est formé par assemblage de deux tubes (21, 22) juxtaposés. La partie inférieur est de type bass-reflex et présente un évent (23).Figure 3 shows a second example of achievement. The enclosure is formed by assembling two tubes (21, 22) juxtaposed. The lower part is bass reflex type and has a vent (23).
Les parois séparant les deux tubes (21, 22) sont percés par des lumières (24, 25) assurant un chemin acoustique entre le haut-parleur de graves (10) et l'évent (23).The walls separating the two tubes (21, 22) are pierced by lights (24, 25) providing a path acoustic between the woofer (10) and the vent (23).
Des cloisons (26, 27) séparent la partie inférieure de l'enceinte, et la partie supérieure renfermant les haut-parleurs d'aigus (9) et de médium (8).Partitions (26, 27) separate the part bottom of the enclosure, and the top containing the tweeters (9) and midrange (8).
La partie supérieure (28) du tube extrudé arrière (22) est rempli d'un matériau viscoélastique assurant l'amortissement vibratoire.The upper part (28) of the extruded tube rear (22) is filled with viscoelastic material providing vibration damping.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9713511A FR2770364B3 (en) | 1997-10-28 | 1997-10-28 | TUBULAR ACOUSTIC SPEAKER |
| FR9713511 | 1997-10-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0951200A2 true EP0951200A2 (en) | 1999-10-20 |
| EP0951200A3 EP0951200A3 (en) | 2000-01-05 |
Family
ID=9512741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98402631A Withdrawn EP0951200A3 (en) | 1997-10-28 | 1998-10-22 | Tubular loudspeaker enclosure |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0951200A3 (en) |
| FR (1) | FR2770364B3 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100479534C (en) * | 2004-12-30 | 2009-04-15 | 南京大学 | Setting method and apparatus for panel loudspeaker case with inner lining micropunch sound absorption material |
| WO2009042383A3 (en) * | 2007-09-27 | 2009-07-16 | Bose Corp | Acoustic waveguide mode controlling |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4267405A (en) * | 1979-06-05 | 1981-05-12 | Mcintosh Laboratory, Inc. | Stereo speaker system for creating stereo images |
| FR2611105A1 (en) * | 1987-02-12 | 1988-08-19 | Fedoroff Michel | Modular cabinet for sound-rigging facilities and sound-rigging facility produced by means of such a cabinet |
| JPH0247996A (en) * | 1988-08-09 | 1990-02-16 | Mitsubishi Electric Corp | Speaker cabinet |
| US4942939A (en) * | 1989-05-18 | 1990-07-24 | Harrison Stanley N | Speaker system with folded audio transmission passage |
| US5058169A (en) * | 1989-11-01 | 1991-10-15 | Temmer Stephen F | Public address system |
| US5333204A (en) * | 1991-08-09 | 1994-07-26 | Pioneer Electronic Corporation | Speaker system |
| DE19530743C1 (en) * | 1995-08-22 | 1996-08-22 | Friedrich J Schmitz | High-performance loudspeaker housing for entertainment equipment |
| WO1996034261A1 (en) * | 1995-04-26 | 1996-10-31 | Audioform Ab | Arrangement for damping sound and a method for manufacturing the arrangement |
| US5802190A (en) * | 1994-11-04 | 1998-09-01 | The Walt Disney Company | Linear speaker array |
-
1997
- 1997-10-28 FR FR9713511A patent/FR2770364B3/en not_active Expired - Lifetime
-
1998
- 1998-10-22 EP EP98402631A patent/EP0951200A3/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4267405A (en) * | 1979-06-05 | 1981-05-12 | Mcintosh Laboratory, Inc. | Stereo speaker system for creating stereo images |
| FR2611105A1 (en) * | 1987-02-12 | 1988-08-19 | Fedoroff Michel | Modular cabinet for sound-rigging facilities and sound-rigging facility produced by means of such a cabinet |
| JPH0247996A (en) * | 1988-08-09 | 1990-02-16 | Mitsubishi Electric Corp | Speaker cabinet |
| US4942939A (en) * | 1989-05-18 | 1990-07-24 | Harrison Stanley N | Speaker system with folded audio transmission passage |
| US5058169A (en) * | 1989-11-01 | 1991-10-15 | Temmer Stephen F | Public address system |
| US5333204A (en) * | 1991-08-09 | 1994-07-26 | Pioneer Electronic Corporation | Speaker system |
| US5802190A (en) * | 1994-11-04 | 1998-09-01 | The Walt Disney Company | Linear speaker array |
| WO1996034261A1 (en) * | 1995-04-26 | 1996-10-31 | Audioform Ab | Arrangement for damping sound and a method for manufacturing the arrangement |
| DE19530743C1 (en) * | 1995-08-22 | 1996-08-22 | Friedrich J Schmitz | High-performance loudspeaker housing for entertainment equipment |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 014, no. 213 (E-0923), 7 mai 1990 (1990-05-07) & JP 02 047996 A (MITSUBISHI ELECTRIC CORP), 16 février 1990 (1990-02-16) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100479534C (en) * | 2004-12-30 | 2009-04-15 | 南京大学 | Setting method and apparatus for panel loudspeaker case with inner lining micropunch sound absorption material |
| WO2009042383A3 (en) * | 2007-09-27 | 2009-07-16 | Bose Corp | Acoustic waveguide mode controlling |
| US7886869B2 (en) | 2007-09-27 | 2011-02-15 | Kevin Bastyr | Acoustic waveguide mode controlling |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2770364A1 (en) | 1999-04-30 |
| FR2770364B3 (en) | 2000-04-07 |
| EP0951200A3 (en) | 2000-01-05 |
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