WO1998016085A1 - Method and apparatus for acoustic chamber with variable volume - Google Patents
Method and apparatus for acoustic chamber with variable volume Download PDFInfo
- Publication number
- WO1998016085A1 WO1998016085A1 PCT/FR1997/001764 FR9701764W WO9816085A1 WO 1998016085 A1 WO1998016085 A1 WO 1998016085A1 FR 9701764 W FR9701764 W FR 9701764W WO 9816085 A1 WO9816085 A1 WO 9816085A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acoustic
- volume
- enclosure
- transducer
- adjustable
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 3
- 239000004744 fabric Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- H04R1/20—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
- H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
Definitions
- the present method is an acoustic enclosure with variable dimension potential, open on both sides, allowing the front and rear sound waves to propagate in space.
- the mechanical constraints are low, and do not require great rigidity.
- the material constituting the acoustic enclosure open in front of or behind an electro-acoustic transducer or both, can be a potentially extensible, modular or elastic structure.
- rubber, a fabric impregnated with elastomer, the whole being foldable and crumpled is suitable.
- the present method can use products not having a continuity of rigidity such as a wooden board, creating a face, but rigid in several elements, modules hinging on themselves, such as a telescopic system, which deploys on itself and folds in on itself before and after using the device.
- products not having a continuity of rigidity such as a wooden board, creating a face, but rigid in several elements, modules hinging on themselves, such as a telescopic system, which deploys on itself and folds in on itself before and after using the device.
- the present process characterized by walls in structure 5 which are extensible and compressible, elastic, determines the variable volume of the speakers, constituting the acoustic load of the speakers.
- the adjustable volume for setting active tests is then set according to listening for use.
- the process using tubes, extensible and compressible, in aluminum sheets, or stainless steel for example, of small thicknesses, millimeter, folded in accordion are applications of light materials.
- Aluminum and thin stainless steel have a very low sound absorption coefficient, which allows better performance.
- the aluminum sheets glued on a flexible support like polyamide fabrics for example, and fixed on a wire frame, or a wooden frame represent an enclosure structure, according to the process, it is the same for materials such as stainless steel or metals, or metal alloys, in folded thin sheets, becoming elastic structures.
- An apparatus (FIG. 1), according to the process of the variable-volume enclosure made of fabric impregnated with polymer, consists of a bellows, provided with at least one acoustic transducer (1) mounted glued, at one end of the bellows ( 2) in accordion with the regular internal cavities (9), thus constituting an acoustic enclosure.
- the transducer in its volume-adjustable enclosure, by its length has the advantage of being used under the most acoustically favorable conditions, by determining exactly the length of the front volume (3), and in Q determining the length of the rear volume ( 4).
- a measuring bar (5) on which slide two collars (7,8) integral with the bellows at its two ends.
- a fixed collar (6) integral with the transducer and the bellows determines on the bar a reference point of length to be determined in real acoustic length 5 front and rear of the transducer according to the characteristics of the transducer, the room and the desired effect, put implemented by a person skilled in the art, who fixes the parameters definitively or leaves them adjustable for use.
- This example is purely indicative, not limiting of the possibilities of the process.
- a variant of the device 0 consists in that the collars are all permanently fixed after a development.
- This method and apparatus have the advantage of being light, flexible in use and of having acoustic characteristics giving a natural ambience, the field of use of which is everyone of audio and audio visual.
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention concerns a method and apparatus for producing an acoustic chamber provided with at least an electroacoustic transducer with adjustable acoustic load. The structure of the chamber consists of telescopic modules or resilient or extensible structures, for adjusting the acoustic load, the volume of which is open in front or at the back of the transducer. An accordion mounting of the structure in the form of bellows, determines the cavities (9) providing an acoustic fineness to the apparatus adjustable in front (3) or at the back (4) of the electroacoustic transducer. The structures in thin folded aluminium or metal or metal alloy sheets represent a structure with resilient chambers for implementing this method. The appliances have the properties of being foldable, light and with acoustic features ensuring a natural ambience, and the field of its use is the whole audio and audio-visual world.
Description
PROCEDE ET APPAREIL POUR ENCEINTE ACOUSTIQUE A VOLUME VARIABLE METHOD AND APPARATUS FOR A VARIABLE VOLUME ACOUSTIC SPEAKER
Il est commun de voir des boites en bois munies de hautsIt is common to see wooden boxes with tops
5 parleurs, ces boites sont nommées de part leurs usages des enceintes acoustiques. En général, pour des causes de vibrations et de résonnances, nuisibles à la pureté du son, les enceintes acoustiques sont toujours rigides, à volume déterminé et parfois lourdes à porter. 0 Le son est véhiculé par l'air, ainsi la densité des matériaux pour réaliser les enceintes acoustiques n'a pas besoin d' être spécialement importante. Le contraste entre la légèreté de l'air et la densité des matériaux , lourds n'a plus de nécessité. En effet la théorie du haut parleur plan se doit d'avoir une séparation absolue 5 entre les ondes avant et les ondes arrière des membranes, ce qui a nécessité des caissons rigides d'absorbtion des ondes arrières.5 speakers, these boxes are named for their uses of loudspeakers. In general, for reasons of vibration and resonance, detrimental to the purity of the sound, the loudspeakers are always rigid, at a determined volume and sometimes heavy to carry. 0 Sound is transported by air, so the density of the materials used to make the loudspeakers need not be particularly high. The contrast between the lightness of the air and the density of heavy materials is no longer necessary. Indeed the theory of the plane loudspeaker must have an absolute separation 5 between the front waves and the rear waves of the membranes, which required rigid boxes for absorbing the rear waves.
Le présent procédé est une enceinte acoustique à potentiel de dimension variable, ouverte des deux cotés, laissant l'onde sonore avant et arrière se propager dans l'espace. Les contraintes o mécaniques sont faibles, et ne demandent pas une grande rigidité. La matière constituant l'enceinte acoustique ouverte en avant ou en arrière d'un transducteur électro-acoustique ou les deux, peut être une structure potentiellement extensible modulable ou élastique. Pour former une structure en soufflet de dimension fixe pendant l'usage de 5 l'appareil, le caoutchouc, un tissu imprégné d'elastomere, le tout étant pliable froissable, convient. Le soufflet et les cavités régulières, internes du volume de l'enceinte, par les plis de la structure sur elle- même , constituent une finesse acoustique supplémentaire.The present method is an acoustic enclosure with variable dimension potential, open on both sides, allowing the front and rear sound waves to propagate in space. The mechanical constraints are low, and do not require great rigidity. The material constituting the acoustic enclosure open in front of or behind an electro-acoustic transducer or both, can be a potentially extensible, modular or elastic structure. To form a bellows structure of fixed dimension during use of the apparatus, rubber, a fabric impregnated with elastomer, the whole being foldable and crumpled, is suitable. The bellows and the regular internal cavities of the volume of the enclosure, by the folds of the structure on itself, constitute an additional acoustic finesse.
Le présent procédé peut utiliser des produits n'ayant pas une 0 continuité de rigidité comme une planche de bois, créant une face, mais rigide en plusieurs éléments, modules s'articulant sur eux- mêmes, tel un système télescopique, qui se déploie sur lui-même et se replie sur lui-même avant et après usage de l'appareil.The present method can use products not having a continuity of rigidity such as a wooden board, creating a face, but rigid in several elements, modules hinging on themselves, such as a telescopic system, which deploys on itself and folds in on itself before and after using the device.
Le présent procédé caractérisé par des parois en structure 5 extensibles et compressibles, élastiques, détermine le volume variable des enceintes, constituant la charge acoustique des haut- parleurs. Le volume modulable pour un réglage d'essais en activité , est ensuite fixé en fonction de l'écoute pour l'usage.
Le procédé utilisant des tubes, extensibles et compressibles, en feuilles d'aluminium , ou inox par exemple, de faibles épaisseurs, millimétriques, pliées en accordéon sont des applications de matières légères. L'aluminium et l'inox en faible épaisseur ont un très faible coefficient d'absorbtion sonore, ce qui permet un rendement meilleur. Les feuilles d'aluminium collées sur un support souple comme les tissus polyamide par exemple , et fixées sur une armature de fil de fer, ou une armature de bois, représentent une structure d'enceinte, suivant le procédé, il en est de même pour les matières comme l'inox ou des métaux, ou alliages de métaux, en feuilles fines pliées, devenant des structures élastiques.The present process characterized by walls in structure 5 which are extensible and compressible, elastic, determines the variable volume of the speakers, constituting the acoustic load of the speakers. The adjustable volume for setting active tests is then set according to listening for use. The process using tubes, extensible and compressible, in aluminum sheets, or stainless steel for example, of small thicknesses, millimeter, folded in accordion are applications of light materials. Aluminum and thin stainless steel have a very low sound absorption coefficient, which allows better performance. The aluminum sheets glued on a flexible support like polyamide fabrics for example, and fixed on a wire frame, or a wooden frame, represent an enclosure structure, according to the process, it is the same for materials such as stainless steel or metals, or metal alloys, in folded thin sheets, becoming elastic structures.
Un appareil (Fig.1) , suivant le procédé de l'enceinte à volume variable en tissu imprégné de polymère est constitué d'un soufflet, muni d'au moins un transducteur acoustique (1) monté collé, en une extrémité du soufflet (2) en accordéon avec les cavités régulières internes(9), constituant ainsi une enceinte acoustique. Le transducteur dans son enceinte réglable en volume, par sa longueur a l'avantage d'être utilisé dans les conditions les plus favorables acoustiquement , en déterminant exactement la longueur du volume avant (3) , et en Q déterminant la longueur du volume arrière (4). Une barrette de mesure (5) sur laquelle coulissent deux colliers (7,8) solidaires du soufflet en ses deux extrémités. Un collier (6) fixe solidaire du transducteur et du soufflet détermine sur la barrette un point de référence de longueur à déterminer en longueur réelle acoustique 5 avant et arrière du transducteur suivant les caractéristiques du transducteur, du local et de l'effet désiré , mis en oeuvre par un homme de I' art, qui fixe les paramètres définitivement ou les laisse réglables pour l'utilisation. Cet exemple est purement indicatif, non limitatif des possiblités du procédé. Une variante de l'appareil 0 consiste en ce que les colliers soient tous fixés définitivement après une mise au point.An apparatus (FIG. 1), according to the process of the variable-volume enclosure made of fabric impregnated with polymer, consists of a bellows, provided with at least one acoustic transducer (1) mounted glued, at one end of the bellows ( 2) in accordion with the regular internal cavities (9), thus constituting an acoustic enclosure. The transducer in its volume-adjustable enclosure, by its length has the advantage of being used under the most acoustically favorable conditions, by determining exactly the length of the front volume (3), and in Q determining the length of the rear volume ( 4). A measuring bar (5) on which slide two collars (7,8) integral with the bellows at its two ends. A fixed collar (6) integral with the transducer and the bellows determines on the bar a reference point of length to be determined in real acoustic length 5 front and rear of the transducer according to the characteristics of the transducer, the room and the desired effect, put implemented by a person skilled in the art, who fixes the parameters definitively or leaves them adjustable for use. This example is purely indicative, not limiting of the possibilities of the process. A variant of the device 0 consists in that the collars are all permanently fixed after a development.
Ce procédé et appareil ont l'avantage d'être légers, souples d'utilisation et d' avoir des caractéristiques acoustiques donnant une ambiance naturelle, dont le domaine d'utilisation est tout le monde de 5 l'audio et l'audio visuel.
This method and apparatus have the advantage of being light, flexible in use and of having acoustic characteristics giving a natural ambience, the field of use of which is everyone of audio and audio visual.
Claims
REVENDICATIONS
1°- Procédé est une enceinte caractérisée par un volume de longueur variable, enceinte ouverte des deux côtés, laissant l'onde sonore avant et arrière d'au moins un transducteur électro acoustique se propager dans l'espace, la structure de l'enceinte étant non rigide, pliable sur elle même .1 ° - Method is an enclosure characterized by a volume of variable length, enclosure open on both sides, letting the front and rear sound wave of at least one electro-acoustic transducer propagate in space, the structure of the enclosure being non-rigid, foldable on itself.
2°- Procédé selon la revendication 1 caractérisé par une structure élastique. 3°- Appareil (Fig.1), étant une enceinte acoustique ouverte des deux cotés, muni d'au moins un transducteur acoustique, collé, monté dans une structure à volume réglable par sa longueur , la structure étant non rigide, pliable , tel un tissu, imprégné de polymère. 4°- Appareil selon la revendication 3 caractérisé par une structure en feuille d'aluminium ou de métal ou alliage de métaux.2 ° - Method according to claim 1 characterized by an elastic structure. 3 ° - Device (Fig. 1), being an acoustic enclosure open on both sides, provided with at least one acoustic transducer, glued, mounted in a structure with volume adjustable by its length, the structure being non-rigid, foldable, such a fabric, impregnated with polymer. 4 ° - Apparatus according to claim 3 characterized by a structure of aluminum foil or metal or metal alloy.
5°- Appareil selon la revendication 3 caractérisé par une structure en polymère.5 ° - Apparatus according to claim 3 characterized by a polymer structure.
6°- Appareil selon la revendication 3 caractérisé par une structure en tissu.6 ° - Apparatus according to claim 3 characterized by a fabric structure.
7°- Appareil selon la revendication 3 caractérisé par des cavités internes du volume de l'enceinte.
7 ° - Apparatus according to claim 3 characterized by internal cavities of the volume of the enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU46262/97A AU4626297A (en) | 1996-10-07 | 1997-10-06 | Method and apparatus for acoustic chamber with variable volume |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR96/12399 | 1996-10-07 | ||
| FR9612399A FR2754415B1 (en) | 1996-10-07 | 1996-10-07 | METHOD AND APPARATUS FOR A VARIABLE VOLUME ACOUSTIC SPEAKER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998016085A1 true WO1998016085A1 (en) | 1998-04-16 |
Family
ID=9496557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1997/001764 WO1998016085A1 (en) | 1996-10-07 | 1997-10-06 | Method and apparatus for acoustic chamber with variable volume |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU4626297A (en) |
| FR (1) | FR2754415B1 (en) |
| WO (1) | WO1998016085A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009123825A1 (en) * | 2008-04-03 | 2009-10-08 | Bose Corporation | Loudspeaker assembly |
| GB2576562A (en) * | 2018-08-24 | 2020-02-26 | Pure International Ltd | An enclosure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2209481A5 (en) * | 1972-12-06 | 1974-06-28 | Varteressian Gerard | |
| JPS56795A (en) * | 1979-06-18 | 1981-01-07 | Yutaka Fukuda | Variable volume speaker box |
| US4889208A (en) * | 1987-02-23 | 1989-12-26 | Katsutoshi Sugihara | Speaker enclosures |
| US5082084A (en) * | 1990-07-23 | 1992-01-21 | Ye Ming Tsao | Extensible sound case |
-
1996
- 1996-10-07 FR FR9612399A patent/FR2754415B1/en not_active Expired - Fee Related
-
1997
- 1997-10-06 AU AU46262/97A patent/AU4626297A/en not_active Abandoned
- 1997-10-06 WO PCT/FR1997/001764 patent/WO1998016085A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2209481A5 (en) * | 1972-12-06 | 1974-06-28 | Varteressian Gerard | |
| JPS56795A (en) * | 1979-06-18 | 1981-01-07 | Yutaka Fukuda | Variable volume speaker box |
| US4889208A (en) * | 1987-02-23 | 1989-12-26 | Katsutoshi Sugihara | Speaker enclosures |
| US5082084A (en) * | 1990-07-23 | 1992-01-21 | Ye Ming Tsao | Extensible sound case |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 5, no. 44 (E - 050) 24 March 1981 (1981-03-24) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009123825A1 (en) * | 2008-04-03 | 2009-10-08 | Bose Corporation | Loudspeaker assembly |
| US8345909B2 (en) | 2008-04-03 | 2013-01-01 | Bose Corporation | Loudspeaker assembly |
| GB2576562A (en) * | 2018-08-24 | 2020-02-26 | Pure International Ltd | An enclosure |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2754415A1 (en) | 1998-04-10 |
| FR2754415B1 (en) | 1998-12-24 |
| AU4626297A (en) | 1998-05-05 |
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