FR2615064A1 - Acoustic column with ground effect - Google Patents

Acoustic column with ground effect Download PDF

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Publication number
FR2615064A1
FR2615064A1 FR8706439A FR8706439A FR2615064A1 FR 2615064 A1 FR2615064 A1 FR 2615064A1 FR 8706439 A FR8706439 A FR 8706439A FR 8706439 A FR8706439 A FR 8706439A FR 2615064 A1 FR2615064 A1 FR 2615064A1
Authority
FR
France
Prior art keywords
tube
loudspeaker
ground
feet
base
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.)
Pending
Application number
FR8706439A
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French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GREMAUD HERVE
Original Assignee
GREMAUD HERVE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GREMAUD HERVE filed Critical GREMAUD HERVE
Priority to FR8706439A priority Critical patent/FR2615064A1/en
Publication of FR2615064A1 publication Critical patent/FR2615064A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—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
    • H04R1/02—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 
    • H04R1/28—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
    • H04R1/2892—Mountings or supports for transducers
    • H04R1/2896—Mountings or supports for transducers for loudspeaker transducers

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

The invention relates to a device allowing sonic reproduction of acoustic signals. It consists of a vertically positioned fibrocement tube 1 whose upper end is blocked off by a loudspeaker 2. The latter is fixed to the tube 1 by a silicone seal 4 limiting the vibrations. The rear wave emitted by the loudspeaker 2 is guided in the tube 1 and emerges in the gap created between the base of the tube 1 and the ground, by the use of feet. One or more additional loudspeakers 5 allow the reproduction of the high frequencies. The tube 1 can be fitted into a sleeve 6 provided with feet 7 so as to create the same gap at the base. The device according to the invention is particularly intended to be connected to a Hi-Fi or sound system, and more especially, in places requiring aesthetic design.

Description

COLONNES ACOUSTIQUE A EFFET DE SOL
La présente invention concerne un dispositif pour la reproduction sonore de signaux électriques.ACOUSTIC GROUND COLUMNS
The present invention relates to a device for the sound reproduction of electrical signals.

La reproduction sonore de tels signaux est traditionnellement effectuée par des enceintes acoustiques, où les Hauts-Parleurs sont positionnés sur la face avant de parallépipèdes, généralement constitués de bois. Ces enceintes acoustiques sont soit closes, et absorbent entièrement l'onde arriere emise par les Hauts-Parleurs, soit équipées d'un évent, ou d'un radiateur passif, permettant de réémettre une partie de cette onde. The sound reproduction of such signals is traditionally carried out by loudspeakers, where the loudspeakers are positioned on the front face of parallelepipeds, generally made of wood. These loudspeakers are either closed, and fully absorb the rear wave emitted by the loudspeakers, or fitted with a vent, or with a passive radiator, allowing part of this wave to be re-emitted.

La diffusion du message sonore est donc très directionnelle, la reproduction des basses fréquences, est limite parla faible utilisation de l'onde arrière émise par les Hauts-parleurs, et la réalisation du corps de l'enceinte est rendue difficile par l'obligation d'obtenir des constructions inertes, ne reagissant pas aux vibrations provoquées par les oscillations de la membrane des Hauts-parleurs. The broadcasting of the sound message is therefore very directional, the reproduction of low frequencies is limited by the low use of the rear wave emitted by the loudspeakers, and the creation of the body of the speaker is made difficult by the obligation to '' obtain inert constructions, not reacting to vibrations caused by oscillations of the loudspeaker membrane.

Le dispositif, selon l'invention, permet de remédier à ces inconvénients. Il se compose, en effet, d'un tube de fibrociment, peu sensible aux vibrations, en position verticale, dont I'extrêmite est obturée entièrement par un Haut-parleur, à l'aide d'un joint silicone ; ltextrêmite inférieure est laissée libre, mais à proximite du sol, car munie de pieds. The device according to the invention overcomes these drawbacks. It consists, in effect, of a fiber cement tube, not very sensitive to vibrations, in a vertical position, the end of which is completely closed by a loudspeaker, using a silicone seal; the lower end is left free, but close to the ground, because it has feet.

Selon une variante, l'extrémité inférieure est emmanchée dans un man chon faisant office de base, et muni de pieds. According to a variant, the lower end is fitted into a sleeve serving as a base, and provided with feet.

L'onde avant du Haut-parleur est emise vers le haut, avec une symétrie d'axe, tandis que l'onde arrière émerge librement par l'extrémité inférieure du tube, dans l'espace compris entre le bas du tube (ou du manchon), et le sol, avec la même symétrie d'axe. La proximite du sol permet néanmoins de créer une charge acoustique à l'intérieur du tube, afin que le haut-parleur travaille dans des conditions normales. La reproduction des Hautes-Fréquences est effectuée par un ou plusieurs Haut-parleurs, fixés à l'extrémité supérieure du tube. The front wave of the loudspeaker is emitted upwards, with an axis symmetry, while the rear wave emerges freely from the lower end of the tube, in the space between the bottom of the tube (or the sleeve), and the ground, with the same axis symmetry. The proximity of the ground nevertheless makes it possible to create an acoustic load inside the tube, so that the loudspeaker works under normal conditions. High-frequency reproduction is carried out by one or more loudspeakers, fixed at the upper end of the tube.

Le message sonore est. donc beaucoup moins directionnel, et l'utilisation importante de l'onde arrière, permet une meilleure reproduction des basses frequences. L'utilisation d'un tube de fibrociment et d'un joint silicone permet d'éviter les vibrations parasites, et le rayonnement du corps de l'enceinte. The audible message is. therefore much less directional, and the significant use of the rear wave, allows better reproduction of low frequencies. The use of a fiber cement tube and a silicone joint makes it possible to avoid parasitic vibrations and radiation from the body of the enclosure.

La figure 1 représente, en coupe, le dispositif selon l'invention. Figure 1 shows, in section, the device according to the invention.

La figure 2 représente, en coupe, une variante de ce dispositif.  Figure 2 shows, in section, a variant of this device.

Le dispositif représenté sur la figure. 1, se compose d'un tube de fibro-ciment (1) de dimensions quelconques. L'emploi d'un Haut-parleur (2) de dimensions appropriées, permet d'obturer l'extrêmité supérieure du tube (1), à l'aide d'un joint silicone (4). L'extrémité inferieure du tube (1), est munie de pieds (3) qui la surélèvent par rapport au sol, permettant ainsi à l'onde arrière émise par le Haut-parleur (2), d'émerger librement, tout en gardant une certaine charge acoustique dans le tube. Les basses et moyennes fréquences sont donc émises dans toutes les directions, à partir des extrêmités supérieures et inférieures du tube (1), tandis que les hautes fréquences sont émises vers l'auditeur par un (ou plusieurs) Haut-parleur (5) fixés à l'extrémité supérieure du tube (1). The device shown in the figure. 1, consists of a fiber cement tube (1) of any size. The use of a loudspeaker (2) of appropriate dimensions makes it possible to seal the upper end of the tube (1), using a silicone seal (4). The lower end of the tube (1) is provided with feet (3) which raise it above the ground, thus allowing the rear wave emitted by the loudspeaker (2) to emerge freely, while keeping some acoustic load in the tube. The low and medium frequencies are therefore emitted in all directions, from the upper and lower ends of the tube (1), while the high frequencies are emitted to the listener by one (or more) speaker (5) fixed at the upper end of the tube (1).

Dans la forme de réalisation selon la figure 2, l'extrémité inférieure du tube (1), est emmanchée dans un manchon (6) faisant office de base, et augmentant la stabilité de l'ensemble. Le manchon (6) est alors muni de pieds (7) permettant de positionner l'extrémité du tube (1) à proximité du sol. In the embodiment according to Figure 2, the lower end of the tube (1) is fitted into a sleeve (6) acting as a base, and increasing the stability of the assembly. The sleeve (6) is then provided with feet (7) making it possible to position the end of the tube (1) close to the ground.

Le dispositif selon l'invention est particulièrement destiné à être raccordé à une chaine Haute fidélité, ou une sonorisation, et plus spécialement, dans des lieux nécessitant une recherche esthétique.  The device according to the invention is particularly intended to be connected to a High fidelity chain, or a sound system, and more especially, in places requiring aesthetic research.

Claims (5)

REVENDICATIONS 1) Dispositif pour la reproduction sonore de Messages électriques caractérise en ce qu'il est constituéd'un tube de fibro-ciment (1) positionné verticalement, dont l'extrémité supérieure est obstruée par un Haut-parleur (2), et dont l'extrêmité inferieure est libre, mais à proximité du sol. 1) Device for the sound reproduction of Electric Messages characterized in that it consists of a fiber cement tube (1) positioned vertically, the upper end of which is obstructed by a loudspeaker (2), and the l he lower end is free, but close to the ground. 2) Dispositif selon la revendication l caractérisé en ce que le tube (1: est munis de pieds (3) à la base, afin d'en positionner l'extrémité inférieure à proximité du sol. 2) Device according to claim l characterized in that the tube (1: is provided with feet (3) at the base, in order to position the lower end close to the ground. 3) Dispositif selon la revendication 1 caractérise en ce que le joint silicone (4) permet de coller le Haut-parleur (2) à l'extrémité supérieure du tube (1) tout en assurant l'étanchéité à cet endroit, et en limitant la transmission des vibrations mécaniques provoquées par le fonctionnement du Hautparleur (2). 3) Device according to claim 1 characterized in that the silicone seal (4) makes it possible to stick the loudspeaker (2) to the upper end of the tube (1) while ensuring sealing at this location, and limiting the transmission of mechanical vibrations caused by the operation of the loudspeaker (2). 4) Dispositif selon la revendication 1 caractérisé en ce que les Hautes frequences sont reproduites par un (ou plusieurs) Haut parleur (5) fixé sur la collerette du Haut-parleur (2). 4) Device according to claim 1 characterized in that the high frequencies are reproduced by one (or more) speaker (5) fixed to the collar of the speaker (2). 5) Dispositif selon la revendication 1 caractérisé en ce que l'extré- mité inférieure du tube (1) est engagée dans un Manchon (6) faisant office de base, et muni de pieds (7) permettant de positionner l'ensemble à proximite du sol.  5) Device according to claim 1 characterized in that the lower end of the tube (1) is engaged in a sleeve (6) serving as a base, and provided with feet (7) for positioning the assembly nearby of the ground.
FR8706439A 1987-05-05 1987-05-05 Acoustic column with ground effect Pending FR2615064A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8706439A FR2615064A1 (en) 1987-05-05 1987-05-05 Acoustic column with ground effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8706439A FR2615064A1 (en) 1987-05-05 1987-05-05 Acoustic column with ground effect

Publications (1)

Publication Number Publication Date
FR2615064A1 true FR2615064A1 (en) 1988-11-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8706439A Pending FR2615064A1 (en) 1987-05-05 1987-05-05 Acoustic column with ground effect

Country Status (1)

Country Link
FR (1) FR2615064A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652224A1 (en) * 1989-09-15 1991-03-22 Vernede Benoit Acoustic enclosure with hydraulic damping
WO1996027999A1 (en) * 1995-03-06 1996-09-12 Willibrordus Hermanus Korfage Loudspeaker device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1363068A (en) * 1963-06-10 1964-06-05 Improvement in sound reproduction at the stage of electroacoustic transformation for monophonic and stereophonic hearing
US3547220A (en) * 1969-12-04 1970-12-15 Michael L Watson Sound radiating device
US4580654A (en) * 1985-03-04 1986-04-08 Hale James W Portable sound speaker system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1363068A (en) * 1963-06-10 1964-06-05 Improvement in sound reproduction at the stage of electroacoustic transformation for monophonic and stereophonic hearing
US3547220A (en) * 1969-12-04 1970-12-15 Michael L Watson Sound radiating device
US4580654A (en) * 1985-03-04 1986-04-08 Hale James W Portable sound speaker system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652224A1 (en) * 1989-09-15 1991-03-22 Vernede Benoit Acoustic enclosure with hydraulic damping
WO1996027999A1 (en) * 1995-03-06 1996-09-12 Willibrordus Hermanus Korfage Loudspeaker device
NL9500440A (en) * 1995-03-06 1996-10-01 Willibrordus Hermanus Korfage Loudspeaker device.

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