FR2627341A1 - Bass loudspeaker enclosure using opposed vertical deposition - has units mounted in top and bottom of cabinet and directing sound via floor and ceiling to reach listener's ears in phase - Google Patents

Bass loudspeaker enclosure using opposed vertical deposition - has units mounted in top and bottom of cabinet and directing sound via floor and ceiling to reach listener's ears in phase Download PDF

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Publication number
FR2627341A1
FR2627341A1 FR8801691A FR8801691A FR2627341A1 FR 2627341 A1 FR2627341 A1 FR 2627341A1 FR 8801691 A FR8801691 A FR 8801691A FR 8801691 A FR8801691 A FR 8801691A FR 2627341 A1 FR2627341 A1 FR 2627341A1
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Prior art keywords
box
phase
acoustic enclosure
ceiling
loudspeaker
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FR8801691A
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French (fr)
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FR2627341B1 (en
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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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • 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 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band

Abstract

A symmetrical air-filled enclosured (4) carries bass loudspeaker units (1,2) in its flat top and bottom faces. Airtight seals (6) are provided between the unit edges and the cabinet material. The assembly is mounted on legs (7) which maintain a separation from the floor (3) beneath of at least one-half of the loudspeaker's cone diameter. Sound can thus pass to a listener by reflection both from floor and ceiling. The sound heard by persons disposed horizontally with respect to the enclosure arrives from both sources in phase, and associated reflections from walls are also in phase. Respnse is as enhanced and parasitic resonances are self-cancelling, directivity being eliminated. ADVANTAGE - Opposed vertical disposition avoids disadvantages of other twin-unit loudspeaker arrangements, including out-of-phase losses, directivity, and reflection distortion, and does not involve use of bulky cabinets.

Description

Perfectionnements aux enceintes acoustiques. Improvements to loudspeakers.

La présente invention est -relative aux enceintes acoustiques. The present invention relates to loudspeakers.

Sur les enceintes acoustiques actuelles, divers systèmes existent actuellement pour augmenter la qualité et la puissance des sons graves. Parmi ces systèmes, on peut citer
A) la mise en parallèle de deux haut-parleurs de graves dans le même coffret : sur la face avant, ces deux haut-parleurs poussent l'air en même temps sur les impulsions de basses (voir la figure 1)
B) un système équipé de deux haut-parleurs disposés l'un derrière l'autre sur la face avant : le hautparleur arrière pousse la masse d'air contenue derrière le haut-parleur de façade, aidant celui-ci dans son déplacement (voir la figure 2)
C) un système équipé de deux haut-parleurs en caissons latéraux poussant à droite et à gauche en même temps (voir la figure 3).On current loudspeakers, various systems currently exist to increase the quality and the power of bass sounds. Among these systems, we can cite
A) putting two woofers in parallel in the same box: on the front panel, these two speakers push the air at the same time on the bass pulses (see Figure 1)
B) a system fitted with two loudspeakers placed one behind the other on the front face: the rear loudspeaker pushes the mass of air contained behind the front loudspeaker, helping it to move (see Figure 2)
C) a system equipped with two loudspeakers in lateral boxes pushing right and left at the same time (see Figure 3).

Les défauts générés par la plupart des systèmes à deux ou plusieurs haut-parleurs de graves sont
1') pertes des phases acoustiques, dues à leur position dans l'espace
2') encombrement des ébénisteries par -la disposition horizontale des haut-parleurs
3-) distorsions provoquées'par les réflexions des murs voisins des haut-parleurs, les hauts-parleurs n'étant pas à égales distances de ces murs
4') directivité unique due au montage sur une face de l'enceinte
5-) résonance des haut-parleurs dans un montage non symétrique.The faults generated by most two or more woofer systems are
1 ') losses of the acoustic phases, due to their position in space
2 ') dimensions of the cabinet-making by the horizontal arrangement of the loudspeakers
3-) distortions caused by reflections from the walls near the loudspeakers, the loudspeakers not being at equal distances from these walls
4 ') unique directivity due to mounting on one side of the enclosure
5-) resonance of the loudspeakers in a non-symmetrical assembly.

L'invention a pour but d'améliorer la reproduction des sons graves et extrêmes graves sur les enceintes acoustiques. Elle a également pour but de remédier aux défauts susvisés des enceintes acoustiques connues. The object of the invention is to improve the reproduction of low and extreme low tones on loudspeakers. It also aims to remedy the aforementioned faults of known loudspeakers.

L'invention consiste à utiliser deux hautparleurs agencés pour la reproduction des sons graves et extrêmes graves et alignés verticalement sur un même axe, le haut-parleur du haut rayonnant vers le plafond tandis que le haut-parleur du bas rayonne vers le 501, ces deux hautparleur s étant fixés tête-bêche respectivement à deux extrémités opposées d'un coffret rempli d'air et pratiquement étanche. The invention consists in using two loudspeakers arranged for the reproduction of low and extreme bass sounds and aligned vertically on the same axis, the loudspeaker from the top radiating towards the ceiling while the loudspeaker from the bottom radiates towards the 501, these two loudspeakers being fixed head to tail respectively at two opposite ends of a cabinet filled with air and practically sealed.

L'invention va être maintenant décrite plus en détail à l'aide des dessins annexés. The invention will now be described in more detail using the accompanying drawings.

Les figures 1, 2 et 3, auxquelles il est fait allusion ci-dessus, illustrent l'état de la technique par des vues en coupe verticale schématiques. Figures 1, 2 and 3, to which reference is made above, illustrate the state of the art by schematic vertical section views.

Les figures 4 et 5 représentent, par des. vues en coupe verticale schématiques, deux enceintes acoustiques établies conformément à l'invention. Figures 4 and 5 show, by. schematic vertical section views, two loudspeakers established in accordance with the invention.

La figure 6 illustre, a titre d'exemple, le fonctionnement de l'enceinte acoustique de la figure A.  Figure 6 illustrates, by way of example, the operation of the acoustic enclosure of Figure A.

Sur toutes les figures, on a désigné par 1 et 2 deux haut-parleurs équipant des enceintes acoustiques connues (figures 1 à 3) ou des enceintes acoustiques conformes à l'invention (figures 4 à 6). In all the figures, two and one speakers have been designated by 1 and 2 equipping known loudspeakers (Figures 1 to 3) or loudspeakers according to the invention (Figures 4 to 6).

Comme indiqué ci-dessus, les deux hautparleurs 1 et 2 de l'enceinte acoustique connue de la figure
1 sont mises en parallèle dans un méme coffret 10 ; ceux de l'enceinte acoustique de la figure -2 sont disposés l'un derrière l'autre dans le coffret 10 sur un même axe horizontal ; et ceux de la figure 3 sont alignés tête-bêche sur un axe horizontal dans le coffret 10. Les principaux défauts de ces enceintes acoustiques connues ont été rappelés cidessus.As indicated above, the two speakers 1 and 2 of the known acoustic enclosure of the figure
1 are placed in parallel in the same box 10; those of the acoustic enclosure of Figure -2 are arranged one behind the other in the box 10 on the same horizontal axis; and those of FIG. 3 are aligned head to tail on a horizontal axis in the box 10. The main faults of these known loudspeakers have been recalled above.

Afin d'éliminer ces défauts, l'enceinte acoustique conforme à l'invention est essentiellement caractérisée en ce qu'elle comprend deux haut-parleurs 1 et 2 alignés sur un axe vertical X-X, le haut-parleur 1 du haut rayonnant vers le plafond tandis que le haut-parleur 2 du bas rayonne vers le sol ou plancher 3, ces deux hautparleurs 1 et 2 étant fixés tête-bêche respectivement à deux extrémités opposées d'un coffret 4 rempli d'air et pratiquement étanche. L'étanchéité au niveau de chacun des hautparleurs est assurée par la membrane (non montrée) de celui-ci tandis que l'étanchéité autour de chacun des hautparleurs est assurée par un joint d'étanchéité circulaire 6. In order to eliminate these defects, the acoustic enclosure according to the invention is essentially characterized in that it comprises two loudspeakers 1 and 2 aligned on a vertical axis XX, the loudspeaker 1 from the top radiating towards the ceiling while the bottom speaker 2 radiates towards the ground or floor 3, these two speakers 1 and 2 being fixed head to tail respectively at two opposite ends of a box 4 filled with air and practically sealed. The seal at each of the speakers is provided by the diaphragm (not shown) thereof while the seal around each of the speakers is provided by a circular seal 6.

En général, les haut-parleurs 1 et 2 sont identiques.In general, speakers 1 and 2 are identical.

Le coffret 4 peut être plus haut que large
(figures 4 et 6) ou plus large que haut (figure 5) ou encore approximativement aussi large que haut. Le coffret 4 a avantageusement une forme symétrique par rapport à l'axe vertical X-X -et, en particulier, une forme prismatique ou de révolution : cube, parallélépipède, prisme droit, sphère, pyramides tronquées, cônes ou cylindres tronqués, tonneaux ou analogues.Box 4 can be taller than wide
(Figures 4 and 6) or wider than high (Figure 5) or approximately as wide as high. The box 4 advantageously has a symmetrical shape with respect to the vertical axis XX -and, in particular, a prismatic or revolution shape: cube, parallelepiped, straight prism, sphere, truncated pyramids, truncated cones or cylinders, barrels or the like.

Quel que soit son volume ou sa forme, le coffret 4 doit être agencé de façon à être monté à l'écart du sol 3, d'une distance égale ou supérieure au rayon de la membrane du haut-parleur inférieur 2. A cet effet, le coffret 4 peut être muni de pieds 7 suffisamment étroits pour ne pas gêner la propagation des ondes sonores issues du haut-parleur inférieur 2. En variante, le coffret 4 peut être agencé de manière à pouvoir être suspendu à l'aide de cordes, chaînes ou d'un support mural fixe ou articulé. Whatever its volume or shape, the box 4 must be arranged so as to be mounted away from the ground 3, by a distance equal to or greater than the radius of the diaphragm of the lower speaker 2. For this purpose , the box 4 can be provided with feet 7 which are sufficiently narrow so as not to hinder the propagation of the sound waves coming from the lower loudspeaker 2. As a variant, the box 4 can be arranged so that it can be suspended using cords , chains or a fixed or articulated wall support.

Bien entendu, en plus de l'enceinte acoustique qui vient d'être décrite et qui sert à la reproduction des sons gaves et extrêmes graves, il est prévu des enceintes acoustiques de type classique pour la reproduction du medium et des aigus. Of course, in addition to the acoustic enclosure which has just been described and which is used for the reproduction of gave and extreme bass sounds, there are provided conventional type acoustic speakers for the reproduction of the medium and treble.

On obtient ainsi une enceinte acoustique qui offre les avantages suivants, illustrés à la figure 6. An acoustic enclosure is thus obtained which offers the following advantages, illustrated in FIG. 6.

Les haut-parleurs 1 et 2 se trouvant dans une configuration symétrique verticale "tête-bêche" sur le même axe X-X, rayonnent leur énergie en harmonie parfaite (en "pulsant" en sens opposés comme une "sphère pulsante" qui représente, comme on le sait, l'idéal théorique). Les impulsions de chaque haut-parleur atteignent en même temps les oreilles 8 de l'auditeur qui se trouvent à l'horizontale de l'enceinte. il en est de même pour l'énergie réfléchie par le mur arrière 9 et les murs latéraux, le tout s'additionnant et augmentant les impulsions dans les basses de plus de 50 t par rapport à une enceinte de même volume, de type classique, ce qui représente un gain de plus de 3 décibels. Les résonances parasites de chaque haut-parleur sont stoppées du fait de la parfaite symétrie de charge, les vibrations de l'un annulant celles de l'autre automatiquement. The loudspeakers 1 and 2 being in a vertical symmetrical configuration "head to tail" on the same axis XX, radiate their energy in perfect harmony (by "pulsating" in opposite directions like a "pulsating sphere" which represents, as we know it, the theoretical ideal). The pulses of each speaker reach the ears 8 of the listener which are horizontal to the speaker. the same is true for the energy reflected by the rear wall 9 and the side walls, the whole adding up and increasing the pulses in the bass by more than 50 t compared to an enclosure of the same volume, of the conventional type, which represents a gain of more than 3 decibels. The parasitic resonances of each speaker are stopped due to the perfect load symmetry, the vibrations of one canceling out those of the other automatically.

La bande de fréquence reproduite dans l'extrême grave peut être inférieure à 30 Hz pour un volume utile de 20 litres. Les fréquences maximales reproduites dans le médium peuvent atteindre 1000 Hz (à 2000 Hz pour les petits diamètres de haut-parleurs). Sur le plan horizontal, le rayonnement reste uniforme sur 360' autour de l'enceinte,.  The frequency band reproduced in the extreme bass can be less than 30 Hz for a useful volume of 20 liters. The maximum frequencies reproduced in the midrange can reach 1000 Hz (at 2000 Hz for small speaker diameters). On the horizontal plane, the radiation remains uniform over 360 'around the enclosure.

Claims (8)

REVENDICATIONS 1. Enceinte acoustique comportant deux hautparleurs (1, 2) agencés pour la reproduction des sons graves et extrêmes graves et montés sur le même coffret (4), caractérisée en ce que les deux haut-parleurs (1, 2) sont alignés sur un axe vertical (X-X), le haut-parleur (1) du haut rayonnant vers le plafond tandis que le haut-parleur (2) du bas rayonne vers le sol ou plancher (3), ces deux haut-parleurs (1, 2) étant fixés tête-bêche respectivement à deux extrémités opposées du coffret (4) rempli d'air et pratiquement étanche. 1. Acoustic enclosure comprising two speakers (1, 2) arranged for the reproduction of low and extreme bass sounds and mounted on the same box (4), characterized in that the two speakers (1, 2) are aligned on a vertical axis (XX), the loudspeaker (1) radiating towards the ceiling while the loudspeaker (2) radiating towards the ground or floor (3), these two loudspeakers (1, 2) being fixed head to tail respectively at two opposite ends of the box (4) filled with air and practically sealed. 2. Enceinte acoustique selon la revendication 1, caractérisée en ce que les deux haut-parleurs (1, 2) sont identiques. 2. Acoustic enclosure according to claim 1, characterized in that the two speakers (1, 2) are identical. 3. Enceinte acoustique selon l'une des revendications 1 et 2, caractérisée en ce que l'étanchéité autour des deux haut-parleurs (1, 2) est assurée par un joint d'étanchéité circulaire (6). 3. Acoustic enclosure according to one of claims 1 and 2, characterized in that the seal around the two speakers (1, 2) is ensured by a circular seal (6). 4. Enceinte acoustique selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le coffret (4) a une forme symétrique par rapport à l'axe vertical (X X).  4. Acoustic enclosure according to any one of claims 1 to 3, characterized in that the box (4) has a symmetrical shape relative to the vertical axis (X X). 5. Enceinte acoustique selon la revendication 4, caractérisée en ce que le coffret (4) a une forme de révolution autour de l'axe vertical (X-X). 5. Acoustic enclosure according to claim 4, characterized in that the box (4) has a shape of revolution around the vertical axis (X-X). 6. Enceinte acoustique selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le coffret (4) est agencé de façon à être monté à l'écart du sol (3), d'une distance égale ou supérieure au rayon de la membrane du haut-parleur inférieur (2). 6. Acoustic enclosure according to any one of claims 1 to 5, characterized in that the box (4) is arranged so as to be mounted away from the ground (3), by a distance equal to or greater than the radius the diaphragm of the lower speaker (2). 7. Enceinte acoustique selon la revendication 6, caractérisée en ce que le coffret (4) est muni de pieds (7). 7. Acoustic enclosure according to claim 6, characterized in that the box (4) is provided with feet (7). 8. Enceinte acoustique selon la revendication 6, caractérisée en ce que le coffret (4) est agencé de manière à pouvoir être suspendu.  8. Acoustic enclosure according to claim 6, characterized in that the box (4) is arranged so that it can be suspended.
FR8801691A 1988-02-12 1988-02-12 IMPROVEMENTS ON SOUND LOUDSPEAKERS Expired - Fee Related FR2627341B1 (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673501A1 (en) * 1991-03-01 1992-09-04 Piccaluga Pierre Device for reducing the directional characteristics of loudspeakers of the same acoustic enclosure
EP0665704A1 (en) * 1994-01-28 1995-08-02 Marc Albert Giusto Improvement to sound reproduction devices and acoustic enclosures for omnidirectional radiation
EP1648196A3 (en) * 2004-10-18 2008-08-06 Daniele Ramenzoni Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves
WO2018057146A1 (en) * 2016-09-23 2018-03-29 Apple Inc. Audio driver and power supply unit architecture
US10631071B2 (en) 2016-09-23 2020-04-21 Apple Inc. Cantilevered foot for electronic device
US10652650B2 (en) 2014-09-30 2020-05-12 Apple Inc. Loudspeaker with reduced audio coloration caused by reflections from a surface
US11256338B2 (en) 2014-09-30 2022-02-22 Apple Inc. Voice-controlled electronic device
FR3119960A1 (en) * 2021-02-18 2022-08-19 Moca Audio Vehicle comprising a sound reproduction device placed in a front median space of the passenger compartment, adapted device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054856A (en) * 1959-02-24 1962-09-18 Arany Donald Sound reproducing system
FR2373936A1 (en) * 1976-12-13 1978-07-07 Debergh Jean Loudspeaker cabinet constructional system - includes two opposed woofers with sealed cubic air space between them of min. possible volume
FR2393500A1 (en) * 1977-06-04 1978-12-29 Manger J W LOUD SPEAKER
US4182931A (en) * 1978-04-25 1980-01-08 Kenner Samuel K 360 Degree speakers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054856A (en) * 1959-02-24 1962-09-18 Arany Donald Sound reproducing system
FR2373936A1 (en) * 1976-12-13 1978-07-07 Debergh Jean Loudspeaker cabinet constructional system - includes two opposed woofers with sealed cubic air space between them of min. possible volume
FR2393500A1 (en) * 1977-06-04 1978-12-29 Manger J W LOUD SPEAKER
US4182931A (en) * 1978-04-25 1980-01-08 Kenner Samuel K 360 Degree speakers

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673501A1 (en) * 1991-03-01 1992-09-04 Piccaluga Pierre Device for reducing the directional characteristics of loudspeakers of the same acoustic enclosure
EP0665704A1 (en) * 1994-01-28 1995-08-02 Marc Albert Giusto Improvement to sound reproduction devices and acoustic enclosures for omnidirectional radiation
FR2715791A1 (en) * 1994-01-28 1995-08-04 Giusto Marc Albert Improvement to sound reproduction devices and omnidirectional acoustic speakers.
EP1648196A3 (en) * 2004-10-18 2008-08-06 Daniele Ramenzoni Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves
US7664283B2 (en) 2004-10-18 2010-02-16 Andrea Chiesi Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves
US11256338B2 (en) 2014-09-30 2022-02-22 Apple Inc. Voice-controlled electronic device
US10652650B2 (en) 2014-09-30 2020-05-12 Apple Inc. Loudspeaker with reduced audio coloration caused by reflections from a surface
US11818535B2 (en) 2014-09-30 2023-11-14 Apple, Inc. Loudspeaker with reduced audio coloration caused by reflections from a surface
US10524044B2 (en) 2014-09-30 2019-12-31 Apple Inc. Airflow exit geometry
USRE49437E1 (en) 2014-09-30 2023-02-28 Apple Inc. Audio driver and power supply unit architecture
US10609473B2 (en) 2014-09-30 2020-03-31 Apple Inc. Audio driver and power supply unit architecture
US11290805B2 (en) 2014-09-30 2022-03-29 Apple Inc. Loudspeaker with reduced audio coloration caused by reflections from a surface
US10911863B2 (en) 2016-09-23 2021-02-02 Apple Inc. Illuminated user interface architecture
US10834497B2 (en) 2016-09-23 2020-11-10 Apple Inc. User interface cooling using audio component
EP3399768A1 (en) * 2016-09-23 2018-11-07 Apple Inc. Airflow exit geometry
WO2018057146A1 (en) * 2016-09-23 2018-03-29 Apple Inc. Audio driver and power supply unit architecture
US10631071B2 (en) 2016-09-23 2020-04-21 Apple Inc. Cantilevered foot for electronic device
US10587950B2 (en) 2016-09-23 2020-03-10 Apple Inc. Speaker back volume extending past a speaker diaphragm
US11693488B2 (en) 2016-09-23 2023-07-04 Apple Inc. Voice-controlled electronic device
US11693487B2 (en) 2016-09-23 2023-07-04 Apple Inc. Voice-controlled electronic device
US10257608B2 (en) 2016-09-23 2019-04-09 Apple Inc. Subwoofer with multi-lobe magnet
FR3119960A1 (en) * 2021-02-18 2022-08-19 Moca Audio Vehicle comprising a sound reproduction device placed in a front median space of the passenger compartment, adapted device
WO2022175328A1 (en) 2021-02-18 2022-08-25 Moca Audio Front center vehicle console with speakers, and vehicle comprising same

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