FR2770364A1 - Loudspeaker enclosure for mounting several speakers in vertical column - Google Patents
Loudspeaker enclosure for mounting several speakers in vertical column Download PDFInfo
- Publication number
- FR2770364A1 FR2770364A1 FR9713511A FR9713511A FR2770364A1 FR 2770364 A1 FR2770364 A1 FR 2770364A1 FR 9713511 A FR9713511 A FR 9713511A FR 9713511 A FR9713511 A FR 9713511A FR 2770364 A1 FR2770364 A1 FR 2770364A1
- Authority
- FR
- France
- Prior art keywords
- tube
- acoustic enclosure
- extruded tube
- enclosure according
- extruded
- 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.)
- Granted
Links
- 239000003190 viscoelastic substance Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims 1
- 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 6
- 230000007547 defect Effects 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Enceinte acoustique tubulaire. Tubular acoustic enclosure.
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 of loudspeakers. An acoustic enclosure usually consists of a rigid box placed on a base and having at least one cutout corresponding to a loudspeaker.
Le caisson est constitué par un assemblage de faces en bois ou matériaux équivalents. Une qualité essentielle d'une enceinte est sa rigidité mécanique. The box is made up of an assembly of wooden faces or equivalent materials. An essential quality of an enclosure is its mechanical rigidity.
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 assembly therefore requires great care in its execution, to avoid any inhomogeneity and any defect source of vibration or poor transmission of forces.
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 as concrete.
Il est apparu que l'industrialisation de tels enceintes se traduisait inévitablement par des défauts mécaniques entraînant 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 enclosures inevitably resulted in mechanical defects resulting in a deterioration of the acoustic quality. To avoid these defects, an artisanal manufacture can certainly be envisaged, 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 manufacturing process and a structure making it possible to avoid stiffness defects.
A cet effet, l'invention concerne une enceinte acoustique dont le caisson constitué par un tube extrudé. To this end, the invention relates to an acoustic enclosure including the box consisting of an extruded tube.
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 high mechanical rigidity, insofar as this manufacturing method avoids any assembly of separate elements.
Selon une variante, le tube extrudé présente une longueur au moins 5 fois supérieure à la section. According to a variant, the extruded tube has a length at least 5 times greater than the section.
Selon un premier mode de réalisation, le tube extrudé est réalisé en aluminium. According to a first embodiment, the extruded tube is made of aluminum.
Selon un deuxième mode de réalisation, le tube extrudé est réalisé en acier. According to a second embodiment, the extruded tube is made of steel.
Selon un troisième mode de réalisation, le tube extrudé est réalisé en un matière plastique ou en un mat2riau composite constitué par un liant, des éléments de renforts (fibres) et des adjuvants. According to a third embodiment, the extruded tube is made of a plastic material or a composite material consisting of a binder, reinforcing elements (fibers) and adjuvants.
De préférence, un matériau viscoélastique est prévu à l'intérieur du tube. Preferably, a viscoelastic material is provided inside the tube.
Selon une variante préférée, l'enceinte présente une premier matériau visco-élastique tel que du bitumeélastomère à l'intérieur du tube, et un second matériau visco-élastique, tel que du PVC-élastomère chargé à l'extérieur du tube. According to a preferred variant, the enclosure has a first visco-elastic material such as bitumen-elastomer inside the tube, and a second visco-elastic material, such as PVC-elastomer loaded outside the tube.
Le tube ainsi constitué forme une structure composite présentant, par rapport à une paroi homogène, les avantages suivants
- caractéristiques d'isolation phonique supérieure à masse surfacique égale (perte d'énergie importante à l'interface de milieux différents)
- augmentation de la capacité d'amortissement vibratoire de la structure.The tube thus formed forms a composite structure having, compared to a homogeneous wall, the following advantages
- superior sound insulation characteristics with equal areal mass (significant energy loss at the interface of different media)
- increase in the vibration damping capacity of the structure.
L'absorption phonique est assurée par des plaques de feutre textile et de la ouate synthétique disposée à l'intérieur du tube. Sound absorption is ensured by textile felt plates and synthetic wadding placed 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.
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.The invention will be better understood on reading the description which follows, referring to the appended drawings concerning nonlimiting exemplary embodiments, where:
- 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. The embodiment of an enclosure according to the invention shown in Figure 1 and 2 having the general shape of a very thin column, of square section. It consists of an extruded aluminum tube (4). 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.
Les angles arrière du tube (4) sont renforcés par des équerres (5) en "L" de 15 mm de côté, et de 1,5 mm d'épaisseur. Ces équerres (5) sont maintenues sur le tube extrudé (4) par collage.The rear angles of the tube (4) are reinforced by "L" brackets (5) with a side of 15 mm, and 1.5 mm thick. These brackets (5) are held on the extruded tube (4) by gluing.
Les haut-parleurs sont fixés sur la paroi du tube extrudé, et non pas sur la section frontale. Le tube présente à cet effet des trous de passage. 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". The speakers are attached to the wall of the extruded tube, not to the front section. The tube has for this purpose through holes. The front face of the extruded tube (4) is covered with a facade (7) made of natural wood or of reconstituted wood such as "medium".
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.This facade (7) has a thickness of 31 mm. It supports the midrange (8), treble (9) and bass (10) speakers. The front (7) is fixed to the extruded tube by gluing.
Les haut-parleurs.de médium (8) et d'aigus (9) se trouvent dans un compartiment clos séparé de la charge bass-reflex. The midrange (8) and treble (9) speakers are located 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) collés à l'intérieur et à l'extérieur du tube. The vibration damping of the extruded tube (7) is carried out using viscoelastic materials (6) bonded 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'un matériau viscoélastique à base de PVC chargé d'une épaisseur de l'ordre de 1,5 mm à l'extérieur. The viscoelastic material advantageously consists of sheets of a material based on elastomeric bitumen with a thickness of approximately 3 millimeters inside, and of a viscoelastic material based on PVC loaded with a thickness of the 1.5 mm 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. Medium channels (3) 12 mm thick, glued to each end of the tube (4), make it possible to assemble the intermediate covers (2) and the base (12) with wood screws. The decorative cover (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, integral with the base (12) ensures the stability of the enclosure.
L'habillage du tube extrudé d'un manchon en tissus acoustique de type "Jersey" (nom commercial) ne laissant apparaître que le capot (1) et le socle (12), réalisés en bois naturel. The covering of the extruded tube with an acoustic fabric sleeve of the "Jersey" type (trade name) leaving only the cover (1) and the base (12), made of natural wood.
La figure 3 représente un deuxième exemple de réalisation. L'enceinte est formé par assemblage de deux tubes (21, 22) juxtaposés. La charge acoustique du hautparleur de grave (partie inférieur) est de type ligne acoustique et présente un évent (23). FIG. 3 represents a second exemplary embodiment. The enclosure is formed by assembling two juxtaposed tubes (21, 22). The acoustic load of the subwoofer (lower part) is of the acoustic line 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 an acoustic path between the woofer (10) and the vent (23).
De même, ces cloisons sont percées par des lumières dans la partie supérieure, afin de mettre en communication la charge close du haut-parleur de médium (8) et d'aigus (9) avec un volume arrière (28) rempli de ouate synthétique permettant d'absorber plus efficacement l'onde arrière du haut-parleur de médium (28). Likewise, these partitions are pierced by lights in the upper part, in order to put the closed load of the midrange (8) and treble speaker (9) into communication with a rear volume (28) filled with synthetic wadding. allowing more efficient absorption of the rear wave from the midrange speaker (28).
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 lower part of the speaker, and the upper part containing the tweeter (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 rear extruded tube (22) is filled with a viscoelastic material ensuring vibration damping.
Claims (10)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9713511A FR2770364B3 (en) | 1997-10-28 | 1997-10-28 | TUBULAR ACOUSTIC SPEAKER |
| EP98402631A EP0951200A3 (en) | 1997-10-28 | 1998-10-22 | Tubular loudspeaker enclosure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9713511A FR2770364B3 (en) | 1997-10-28 | 1997-10-28 | TUBULAR ACOUSTIC SPEAKER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2770364A1 true FR2770364A1 (en) | 1999-04-30 |
| FR2770364B3 FR2770364B3 (en) | 2000-04-07 |
Family
ID=9512741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9713511A Expired - Lifetime FR2770364B3 (en) | 1997-10-28 | 1997-10-28 | TUBULAR ACOUSTIC SPEAKER |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0951200A3 (en) |
| FR (1) | FR2770364B3 (en) |
Families Citing this family (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 |
| US7886869B2 (en) * | 2007-09-27 | 2011-02-15 | Kevin Bastyr | Acoustic waveguide mode controlling |
Family Cites Families (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 |
| FR2611105B1 (en) * | 1987-02-12 | 1989-07-13 | Fedoroff Michel | MODULAR BOX FOR SOUND SYSTEM AND SOUND SYSTEM MADE BY MEANS OF SUCH A BOX |
| 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 |
| JPH0549081A (en) * | 1991-08-09 | 1993-02-26 | Pioneer Electron Corp | Speaker system |
| US5802190A (en) * | 1994-11-04 | 1998-09-01 | The Walt Disney Company | Linear speaker array |
| SE9501754D0 (en) * | 1995-04-26 | 1995-05-11 | Mirsch Audioform Ab | Apparatus for providing sound attenuating absorbent effect of structures and method for providing apparatus |
| DE19530743C1 (en) * | 1995-08-22 | 1996-08-22 | Friedrich J Schmitz | High-performance loudspeaker housing for entertainment equipment |
-
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
Also Published As
| Publication number | Publication date |
|---|---|
| EP0951200A3 (en) | 2000-01-05 |
| FR2770364B3 (en) | 2000-04-07 |
| EP0951200A2 (en) | 1999-10-20 |
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