EP0833544A1 - Enceinte acoustique destinée plus particulièrement à des hauts-parleurs de puissance pour les basses fréquences - Google Patents
Enceinte acoustique destinée plus particulièrement à des hauts-parleurs de puissance pour les basses fréquences Download PDFInfo
- Publication number
- EP0833544A1 EP0833544A1 EP97440090A EP97440090A EP0833544A1 EP 0833544 A1 EP0833544 A1 EP 0833544A1 EP 97440090 A EP97440090 A EP 97440090A EP 97440090 A EP97440090 A EP 97440090A EP 0833544 A1 EP0833544 A1 EP 0833544A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- box
- space
- speaker
- speakers
- compartments
- 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- Withdrawn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
- 238000005192 partition Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 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
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
- H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material 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
Definitions
- the present invention relates to an enclosure acoustics intended more particularly for loudspeakers power for low frequencies.
- Bass-Reflex acoustic enclosures and in particular closed enclosures and the vented speakers
- Closed enclosures are the most common and do not require any adjustment, they are presented usually in the form of a parallelepiped box rectangle housing one or more loudspeakers, the front face is oriented towards the outside of the enclosure and the back side inward.
- the vented enclosures are made on the Helmholtz resonator principle, namely that when a cavity communicates with the atmosphere through a small opening, or vent, there is a frequency for which the mass of air pushed through the vent enters resonance with the elastic forces of the air enclosed in the cavity, thereby improving the efficiency of the speaker at low frequencies, by resonating the speaker on the resonant frequency of the loudspeaker, the sound energy mainly emanating from the vent.
- the performance of this type of enclosure is higher than that of enclosures closed because the energy coming from the back side the speaker membrane, including the wave representative of this energy which is restored by the vent, is in phase with the wave coming from the front face speaker.
- the devices known to date have a limited bandwidth which does not allow "going down" in the lowest frequencies is the in particular case of the speakers known under the name of "bass-bin".
- the object of the present invention is to remedy these disadvantages by proposing an acoustic enclosure intended to receive loudspeakers radiating in the low frequency range, with limited space and with a very good yield.
- the acoustic enclosure according to the invention is essentially characterized in that it includes a rectangular rectangular box open at its front face, internally comprising on the one hand a wall vertical secured substantially centrally, parallel to the sides of said box, to the internal face of its bottom, and on the other hand oblique panels secured at the free end of said vertical wall and at the edges fronts of the sides of said box, delimiting with the wall vertical two vertical compartments and a space open on the front of the box, said space being separated by two by a horizontal partition delimiting a space upper and lower space, said oblique panels each comprising two circular openings located on either side of said horizontal partition and in each of which is arranged a speaker for low frequencies, the sound wave from a loudspeaker emitted in a vertical compartment being positively coupled with the sound wave emitted in the same compartment by the other speaker and the sound wave from one speaker emitted in the upper or lower space being coupled positively with the sound wave emitted in the same space through the other speaker.
- the loudspeakers are secured so that the waves they emit from their front face propagate directly into the compartments of the box, and that the rear waves propagate directly in the upper or lower spaces.
- the wave propagations can be reversed.
- an enclosure according to the invention comprises a box 1 of rectangular parallelepiped shape whose front side is open, and which internally has a partition vertical 10 delimiting two vertical compartments 11 and 12, secured to the panel 13 forming the bottom of the box 1.
- Two oblique panels 20 and 21 are joined by their lateral edges at the free edge of the vertical partition 10 and at the front inner edge of the side panels, respectively 14 and 15 and each have a circular opening 16 and 17 intended to receive a loudspeaker, not shown in FIG. 1, secured by its front face to the panel 20, 21 at these openings.
- a horizontal partition 22 delimits two open upper 30 and lower 31 spaces towards the front of the housing 1.
- the oblique panels 20 and 21 have triangular openings 23, or decompression vents, which are located near the four corners of the front opening of cabinet 1. These vents 23 optimize the mechanical working mode of the enclosure and therefore to control the extraction value of speakers.
- peripheral edge 160, 170 openings 16, 17 is bevelled towards the outside of so as to leave a space around the speaker membrane, in order to create a compression system by the formation of a compressed air gap during operation speakers, which gives them the outfit necessary for their operation in optimum conditions.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Description
- la figure 1 représente une vue en perspective d'un mode de réalisation préférentiel de l'enceinte selon l'invention.
- la figure 2 représente une vue en coupe transversale, effectuée dans sa moitié supérieure, de la même enceinte munie des hauts-parleurs.
Claims (3)
- Enceinte acoustique destinée plus particulièrement à des hauts-parleurs de puissance pour les basses fréquences caractérisée en ce qu'elle comprend un caisson (1) de forme parallélépipédique rectangle ouvert à sa face avant, comportant intérieurement d'une part une paroi verticale (10) solidarisée sensiblement centralement, parallèlement aux côtés (14,15) dudit caisson (1) à la face interne de son fond (13), et d'autre part des panneaux obliques (20,21) solidarisés à l'extrémité libre de ladite paroi centrale (10) et aux bords antérieurs des côtés (14, 15) dudit caisson (1), délimitant avec la paroi verticale (10) deux compartiments verticaux (11, 12) ainsi qu'un espace ouvert sur l'avant du caisson (1), ledit espace étant séparé en deux par une cloison horizontale (22) délimitant un espace supérieur (30) et un espace inférieur (31), lesdits panneaux obliques (20, 21) comportant chacun deux ouvertures circulaires (16,17) situées de part et d'autre de ladite cloison horizontale (22) et dans chacune desquelles est disposé un haut-parleur (40, 41) pour les basses fréquences, l'onde sonore (6,7) d'un haut-parleur émise dans un compartiment vertical (11, 12) étant couplée positivement avec l'onde sonore émise dans le même compartiment par l'autre haut-parleur et l'onde sonore (6,7) d'un haut-parleur émise dans l'espace supérieur (30) ou inférieur (31) étant couplée positivement avec l'onde sonore émise dans le même espace (30) ou (31) par l'autre haut-parleur.
- Enceinte acoustique selon la revendication 1 caractérisée en ce que le bord périphérique (160,170) des ouvertures circulaires (16,17) est biseauté vers la face avant du caisson (1) et en ce que les haut-parleurs (40, 41) sont solidarisés de manière que les ondes sonores (7) qu'ils émettent par leur face avant se propagent directement dans l'un des compartiments (11, 12) du caisson (1), et que les ondes arrières (6) se propagent directement dans l'un des espaces supérieur (30) ou inférieur (31).
- Enceinte acoustique selon la revendication 1 caractérisée en ce que le bord périphérique (160,170) des ouvertures circulaires (16,17) est biseauté vers les compartiments (11,12) et en ce que les haut-parleurs (40, 41) sont solidarisés de manière que les ondes sonores (7) qu'ils émettent par leur face avant se propagent directement dans l'un des espaces supérieur (30) ou inférieur (31), et que les ondes arrière (6) se propagent directement dans l'un des compartiments (11,12) du caisson (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9611834A FR2753872B1 (fr) | 1996-09-25 | 1996-09-25 | Enceinte acoustique destinee plus particulierement a des hauts-parleurs de puissance pour les basses frequences |
FR9611834 | 1996-09-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0833544A1 true EP0833544A1 (fr) | 1998-04-01 |
Family
ID=9496149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97440090A Withdrawn EP0833544A1 (fr) | 1996-09-25 | 1997-09-25 | Enceinte acoustique destinée plus particulièrement à des hauts-parleurs de puissance pour les basses fréquences |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0833544A1 (fr) |
FR (1) | FR2753872B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999055117A1 (fr) * | 1998-04-22 | 1999-10-28 | Long Tall Ribbon Co. Ab | Transducteur electroacoustique |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB489588A (en) * | 1936-09-02 | 1938-07-29 | Standard Telephones Cables Ltd | Improvements in or relating to sound-translating devices |
DE1270615B (de) * | 1963-06-06 | 1968-06-20 | Automatic Canteen Co | Lautsprechergehaeuse, insbesondere fuer Musikboxen |
US4733749A (en) * | 1986-02-26 | 1988-03-29 | Electro-Voice, Inc. | High output loudspeaker for low frequency reproduction |
US4870691A (en) * | 1987-01-14 | 1989-09-26 | Mindel Gerard S | Load and dispersion cell for sound |
-
1996
- 1996-09-25 FR FR9611834A patent/FR2753872B1/fr not_active Expired - Fee Related
-
1997
- 1997-09-25 EP EP97440090A patent/EP0833544A1/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB489588A (en) * | 1936-09-02 | 1938-07-29 | Standard Telephones Cables Ltd | Improvements in or relating to sound-translating devices |
DE1270615B (de) * | 1963-06-06 | 1968-06-20 | Automatic Canteen Co | Lautsprechergehaeuse, insbesondere fuer Musikboxen |
US4733749A (en) * | 1986-02-26 | 1988-03-29 | Electro-Voice, Inc. | High output loudspeaker for low frequency reproduction |
US4870691A (en) * | 1987-01-14 | 1989-09-26 | Mindel Gerard S | Load and dispersion cell for sound |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999055117A1 (fr) * | 1998-04-22 | 1999-10-28 | Long Tall Ribbon Co. Ab | Transducteur electroacoustique |
Also Published As
Publication number | Publication date |
---|---|
FR2753872A1 (fr) | 1998-03-27 |
FR2753872B1 (fr) | 2004-08-06 |
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