EP0036831A1 - Loudspeaker enclosure - Google Patents

Loudspeaker enclosure Download PDF

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Publication number
EP0036831A1
EP0036831A1 EP81440013A EP81440013A EP0036831A1 EP 0036831 A1 EP0036831 A1 EP 0036831A1 EP 81440013 A EP81440013 A EP 81440013A EP 81440013 A EP81440013 A EP 81440013A EP 0036831 A1 EP0036831 A1 EP 0036831A1
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EP
European Patent Office
Prior art keywords
loudspeakers
loudspeaker
acoustic enclosure
parallel
capacitor
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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Withdrawn
Application number
EP81440013A
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German (de)
French (fr)
Inventor
Jean-Daniel Comparon
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Individual
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Individual
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Publication date
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Publication of EP0036831A1 publication Critical patent/EP0036831A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks

Definitions

  • the present invention relates to an acoustic enclosure.
  • Known loudspeakers usually have two or three loudspeakers specially designed to reproduce bass tones, medium tones and high tones respectively.
  • a filtering device allows the electrical signals transmitted to the different loudspeakers to be separated to properly separate these tones.
  • conventional speakers usually have a flat front face, the different speakers emitting sounds in a more or less open cone whose axis is perpendicular to this face. In this way, the listening angle is relatively narrow and the stereophonic reproduction is of good quality only for a listener placed directly in front of the device.
  • the present invention proposes to remedy these various drawbacks by producing an acoustic enclosure on which the reproduction of the timbre retains all its purity, its clarity and its dynamics, and where the sound retains a very great relief.
  • the equality of the sound spectrum remains the same at all listening levels, which generates excellent sound reproduction for low, medium and high powers.
  • the acoustic enclosure according to the invention is characterized in that it comprises at least one loudspeaker with a large passband, the supply circuit of which comprises at least one of the two resistance and capacitor elements.
  • the acoustic enclosure according to the invention comprises several loudspeakers with wide bandwidth, connected in parallel or in series-parallel, and the supply circuit of which comprises either a pure resistor, or a capacitor, or a resistor and a capacitor connected in parallel.
  • the enclosure of the enclosure according to the invention can comprise at least two flat faces forming an obtuse angle between them, the loudspeakers being embedded in said flat faces.
  • the acoustic enclosure the housing of which is not shown, comprises a loudspeaker 1 connected to ground by a connection 2 and to the positive pole by a connection 3.
  • connection 2 is interposed a circuit composed of a resistor R and a capacitor C connected in parallel.
  • the resistance has the role of constituting a counterweight, that is to say an additional load for high voltages.
  • the purpose of the capacitor is to increase the treble and middle sounds somewhat attenuated due to the presence of the resistor.
  • the enclosure described comprises a loudspeaker 10, which is for example a loudspeaker with an aluminum capsule of 4 Ohm impedance, and a loudspeaker 11, which is preferably a piezoelectric tweeter.
  • the two loudspeakers are connected in parallel, the connection 12 to the ground of the first loudspeaker comprising a circuit constituted by a resistor R and a capacitor C 1 connected in parallel, and the connection 13 to the ground of the second loudspeaker comprising a capacitor C 2 '
  • the acoustic enclosure shown comprises four loudspeakers 20, 21, 22 and 23, the first two of which are for example aluminum capsule loudspeakers, and the second two of which are for example loudspeakers -piezoelectric treble speakers. These speakers are connected in parallel.
  • Ground connections loudspeakers 20 and 21 each comprise a resistor and a capacitor connected in parallel, while the ground connections of the loudspeakers 22 and 23 comprise only one capacitor.
  • FIGS 4 and 5 illustrate an embodiment with eight speakers 30 to 37 connected in parallel.
  • the loudspeaker 30 is connected to ground by a resistor R 1
  • the loudspeaker 31 by a circuit composed of a resistor R 2 and a capacitor CI in parallel
  • the loudspeakers 32 to 36 are connected to the ground by capacitors C 2 to C 6
  • the loudspeaker 37 which is a woofer, has no resistance component, capacitor in its supply circuit.
  • FIG. 6 illustrates an embodiment comprising twelve loudspeakers 40 to 51, connected in series-parallel.
  • the speakers 40 to 43 are connected in series, each comprising in its ground connection circuit, a resistor and a capacitor connected in parallel.
  • This first group of speakers is connected in series with a second group of speakers 44 to 51 respectively connected in parallel.
  • the enclosure shown comprises six speakers 60 to 65 connected on the same principle as those of FIG. 6.
  • the ten speakers are distributed symmetrically and embedded in two front panels arranged in the form of V.
  • FIG. 9 shows a top view, partially in section, which illustrates the shape of the housing 66 of this enclosure, the V-shaped arrangement of the front panels 67 and 68 and the position of the speakers 62 and 63.
  • Figures 10 and 11 show the shape and arrangement of the front panels 52, 53 and 54 relative to the housing 55 of the acoustic enclosure, the circuit of which is shown in Figure 6, as well as the arrangement of the twelve loudspeakers embedded in said front panels.
  • the loudspeaker power supply circuit only includes passive elements, ie resistors and / or capacitors, all active elements such as self-induction coils which consume significant power, having been eliminated.
  • the elements mounted in the circuits can be placed on printed circuit boards directly fixed to the carcass of the loudspeakers.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

Acoustic enclosure comprising a box and at least one loudspeaker housed in this box. It comprises a relatively large number, for example eight loudspeakers 30 to 37, having a wide passband, which are connected in parallel. The earth circuit of these loudspeakers comprises only passive elements, that is to say either a resistor R1 for the loudspeaker 30, capacitors C2 to C6 for the loudspeakers 32 to 36 and a resistor R2 and a capacitor C1 which are connected in parallel for the loudspeaker 31. The loudspeakers are fixed into front panels having several faces disposed in a V shape. <IMAGE>

Description

La présente invention concerne une enceinte acoustique.The present invention relates to an acoustic enclosure.

Les enceintes acoustiques connues comportent habituellement deux ou trois hauts-parleurs spécialement conçus pour reproduire respectivement les sonorités basses, les sonorités moyennes et les sonorités aigues. Un dispositif de filtrage permet de séparer les signaux électriques transmis auxdiffé- rents hauts-parleurs pour bien séparer ces tonalités.Known loudspeakers usually have two or three loudspeakers specially designed to reproduce bass tones, medium tones and high tones respectively. A filtering device allows the electrical signals transmitted to the different loudspeakers to be separated to properly separate these tones.

Cette façon de monter les hauts-parleurs aboutit très souvent à un déséquilibre des sons lorsqu'on augmente la puissance, ce qui se ressent par une décoloration de la reproduction sonore. En outre, le filtrage entraine une modification du timbre, ce qui se traduit par une reproduction non fidèle des sons.This way of mounting the loudspeakers very often results in an imbalance of the sounds when the power is increased, which is felt by a discoloration of the sound reproduction. In addition, the filtering causes a modification of the timbre, which results in an inaccurate reproduction of the sounds.

En outre, les enceintes classiques ont habituellement une face antérieure plane, les différents hauts-parleurs émettant les sons selon un cône plus ou moins ouvert dont l'axe est perpendiculaire à cette face. De cette manière, l'angle d'écoute est relativement étroit et la reproduction stéréophonique n'est de bonne qualité que pour un auditeur placé directement en face de l'appareil.In addition, conventional speakers usually have a flat front face, the different speakers emitting sounds in a more or less open cone whose axis is perpendicular to this face. In this way, the listening angle is relatively narrow and the stereophonic reproduction is of good quality only for a listener placed directly in front of the device.

La présente invention se propose de remédier à ces différents inconvénients en réalisant une enceinte acoustique ppur laquelle la reproduction du timbre garde toute sa pureté, sa clarté et sa dynamique, et où le son conserve un très grand relief. L'égalité du spectre sonore reste le même à tous les niveaux d'écoute, ce qui engendre une reproduction sonore d'excellente qualité pour les basses, moyennes et hautes puissances.The present invention proposes to remedy these various drawbacks by producing an acoustic enclosure on which the reproduction of the timbre retains all its purity, its clarity and its dynamics, and where the sound retains a very great relief. The equality of the sound spectrum remains the same at all listening levels, which generates excellent sound reproduction for low, medium and high powers.

Dans ce but, l'enceinte acoustique selon l'invention est caractérisée en ce qu'elle comporte au moins un haut-parleur à large bande passante dont le circuit d'alimentation comprend au moins un des deux éléments résistance et condensateur.For this purpose, the acoustic enclosure according to the invention is characterized in that it comprises at least one loudspeaker with a large passband, the supply circuit of which comprises at least one of the two resistance and capacitor elements.

Selon une forme de réalisation préférentielle, l'enceinte acoustique selon l'invention comporte plusieurs hauts-parleurs à large bande passante, connectés en parallèle ou en série-parallèle, et dont le circuit d'alimentation comporte soit une résistance pure, soit un condensateur, soit une résistance et un condensateur connectés en parallèle.According to a preferred embodiment, the acoustic enclosure according to the invention comprises several loudspeakers with wide bandwidth, connected in parallel or in series-parallel, and the supply circuit of which comprises either a pure resistor, or a capacitor, or a resistor and a capacitor connected in parallel.

Le boîtier de l'enceinte selon l'invention peut comporter au moins deux faces planes formant un angle obtus entre elles, les hauts-parleurs étant encastrés dans lesdites faces planes.The enclosure of the enclosure according to the invention can comprise at least two flat faces forming an obtuse angle between them, the loudspeakers being embedded in said flat faces.

La présente invention sera mieux comprise en référence à la description d'un exemple de réalisation et des dessins annexés dans lesquels:

  • la figure 1 représente une vue du schéma d'alimentation du haut-parleur unique d'une enceinte selon l'invention,
  • la figure 2 représente le schéma d'alimentation des hauts-parleurs au nombre de deux d'une autre forme de réalisation de l'enceinte acoustique selon l'invention,
  • la figure 3 représente le schéma d'alimentation des quatre hauts-parleurs contenus dans une autre enceinte acoustique selon l'invention,
  • la figure 4 représente le schéma d'alimentation des hauts-parleurs au nombre de huit d'une autre variante d'enceinte acoustique selon l'invention,
  • la figure 5 représente une vue en perspective d'une enceinte selon l'invention,
  • la figure 6 est une vue du schéma d'alimentation des hauts-parleurs au nombre de douze d'une enceinte acoustique selon l'invention,
  • la figure 7 représente une vue du schéma d'alimentation des hauts-parleurs au nombre de six°d'une'autre forme de réalisation d'une enceinte selon l'invention,
  • la figure 8 représente la face antérieure de l'enceinte correspondant au schéma d'alimentation de la figure 7,
  • la figure 9 est une vue de dessus partiellement en coupe de l'enceinte acoustique des figures 7 et 8,
  • la figure 10 représente une vue de la face antérieure de l'enceinte acoustique correspondant au schéma d'alimentation de la figure 6, et
  • la figure 11 représente une vue de dessus partiellement en coupe de l'enceinte acoustique de la figure 10.
The present invention will be better understood with reference to the description of an exemplary embodiment and the accompanying drawings in which:
  • FIG. 1 represents a view of the power supply diagram for the single speaker of an enclosure according to the invention,
  • FIG. 2 represents the power supply diagram for the loudspeakers, two in number, of another embodiment of the acoustic enclosure according to the invention,
  • FIG. 3 represents the power supply diagram for the four loudspeakers contained in another acoustic enclosure according to the invention,
  • FIG. 4 represents the power supply diagram for the eight loudspeakers of another variant of acoustic enclosure according to the invention,
  • FIG. 5 represents a perspective view of an enclosure according to the invention,
  • FIG. 6 is a view of the power supply diagram for the twelve loudspeakers of an acoustic enclosure according to the invention,
  • 7 shows a view of the loudspeaker of the feeding pattern to the number of six-number une'autre embodiment of an enclosure according to the invention,
  • FIG. 8 represents the front face of the corresponding enclosure to the supply diagram in Figure 7,
  • FIG. 9 is a top view partially in section of the acoustic enclosure of FIGS. 7 and 8,
  • FIG. 10 represents a view of the front face of the acoustic enclosure corresponding to the supply diagram of FIG. 6, and
  • FIG. 11 represents a top view partially in section of the acoustic enclosure of FIG. 10.

En référence à la figure 1, l'enceinte acoustique dont le boîtier n'est pas représenté, comporte un haut-parleur 1 relié à la masse par une connexion 2 et au pôle positif par une connexion 3. Dans la connexion 2 est interposé un circuit composé d'une résistance R et d'uncondensateur C connectés en parallèle.With reference to FIG. 1, the acoustic enclosure, the housing of which is not shown, comprises a loudspeaker 1 connected to ground by a connection 2 and to the positive pole by a connection 3. In connection 2 is interposed a circuit composed of a resistor R and a capacitor C connected in parallel.

Dans ce dispositif comme dans les circuits décrits ci-après, la résistance a pour rôle de constituer un contre-poids, c'est-à-dire une charge supplémentaire pour les tensions élevées. Le condensateur a pour but d'augmenter les aigus et les sons moyens quelque peu atténués en raison de la présence de la résistance.In this device as in the circuits described below, the resistance has the role of constituting a counterweight, that is to say an additional load for high voltages. The purpose of the capacitor is to increase the treble and middle sounds somewhat attenuated due to the presence of the resistor.

En référence à la figure 2, l'enceinte décrite comporte un haut-parleur 10, qui est par exemple un haut-parleur à capsule'd'aluminium de 4 Ohm d'impédance, et un haut-parleur 11, qui est de préférence un haut-parleur d'aigus piézo-électriques. Les deux hauts-parleurs sont connectés en parallèle, la connexion 12 à la masse du premier haut-parleur comportant un circuit constitué par une résistance R et un condensateur C1 branchés en parallèle, et la connexion 13 à la masse du deuxième haut-parleur comportant un condensateur C2' With reference to FIG. 2, the enclosure described comprises a loudspeaker 10, which is for example a loudspeaker with an aluminum capsule of 4 Ohm impedance, and a loudspeaker 11, which is preferably a piezoelectric tweeter. The two loudspeakers are connected in parallel, the connection 12 to the ground of the first loudspeaker comprising a circuit constituted by a resistor R and a capacitor C 1 connected in parallel, and the connection 13 to the ground of the second loudspeaker comprising a capacitor C 2 '

En référence à la figure 3, l'enceinte acoustique représentée comporte quatre hauts-parleurs 20, 21, 22 et 23 dont les deux premiers sont par exemple des hauts-parleurs à capsule d'aluminium, et les deux seconds sont par exemple des hauts-parleurs d'aigus piézo-électriques. Ces hautes-parleurs sont connectés en parallèle. Les connexions de masse des hauts-parleurs 20 et 21 comportent chacune une résistance et un condensateur connectés en parallèle, alors que les connexions de masse des hauts-parleurs 22 et 23 ne comportent qu'un condensateur.With reference to FIG. 3, the acoustic enclosure shown comprises four loudspeakers 20, 21, 22 and 23, the first two of which are for example aluminum capsule loudspeakers, and the second two of which are for example loudspeakers -piezoelectric treble speakers. These speakers are connected in parallel. Ground connections loudspeakers 20 and 21 each comprise a resistor and a capacitor connected in parallel, while the ground connections of the loudspeakers 22 and 23 comprise only one capacitor.

Les figures 4 et 5 illustrent une réalisation à huit hauts-parleurs 30 à 37 connectés en parallèle. Le haut-parleur 30 est relié à la masse par une résistance R1, le haut-parleur 31 par un circuit composé d'une résistance R2 et d'un condensateur CI en parallèle, les hauts-parleurs 32 à 36 sont connectés à la masse par des condensateurs C2 à C6, et le haut-parleur 37, qui est un haut-parleur de graves, ne comporte aucun composant résistance, condensateur dans son circuit d'alimentation.Figures 4 and 5 illustrate an embodiment with eight speakers 30 to 37 connected in parallel. The loudspeaker 30 is connected to ground by a resistor R 1 , the loudspeaker 31 by a circuit composed of a resistor R 2 and a capacitor CI in parallel, the loudspeakers 32 to 36 are connected to the ground by capacitors C 2 to C 6 , and the loudspeaker 37, which is a woofer, has no resistance component, capacitor in its supply circuit.

La figure 6 illustre une forme de réalisation comprenant douze hauts-parleurs 40 à 51, connectés en série-parallèle. Les hauts-parleurs 40 à 43, sont connectés en série, chacun comprenant dans son circuit de raccordement à la masse, une résistance et un condensateur branchés en parallèle. Ce premier groupe de hauts-parleurs est branché en série avec un second groupe de hauts-parleurs 44 à 51 respectivement connectés en parallèle.FIG. 6 illustrates an embodiment comprising twelve loudspeakers 40 to 51, connected in series-parallel. The speakers 40 to 43 are connected in series, each comprising in its ground connection circuit, a resistor and a capacitor connected in parallel. This first group of speakers is connected in series with a second group of speakers 44 to 51 respectively connected in parallel.

En référence aux figures 7 et 8, l'enceinte représentée comporte six hauts-parleurs 60 à 65 connectés selon le même principe que ceux de la figure 6. Les dix hauts-parleurs sont répartis symétriquement et encastrés dans deux panneaux frontaux disposés en forme de V.With reference to FIGS. 7 and 8, the enclosure shown comprises six speakers 60 to 65 connected on the same principle as those of FIG. 6. The ten speakers are distributed symmetrically and embedded in two front panels arranged in the form of V.

La figure 9 représente une vue de dessus, partiellement en coupe qui illustre la forme du boîtier 66 de cette enceinte, la disposition en forme de V des panneaux frontaux 67.et 68 et la position des hauts-parleurs 62 et 63.FIG. 9 shows a top view, partially in section, which illustrates the shape of the housing 66 of this enclosure, the V-shaped arrangement of the front panels 67 and 68 and the position of the speakers 62 and 63.

Les figures 10 et 11 montrent la forme et la disposition des panneaux frontaux 52, 53 et 54 par rapport au boîtier 55 de l'enceinte acoustique dont le circuit est représenté par la figure 6, ainsi que la disposition des douze hauts-parleurs encastrés dans lesdits panneaux frontaux.Figures 10 and 11 show the shape and arrangement of the front panels 52, 53 and 54 relative to the housing 55 of the acoustic enclosure, the circuit of which is shown in Figure 6, as well as the arrangement of the twelve loudspeakers embedded in said front panels.

Le circuit d'alimentation des hauts-parleurs ne comporte que des éléments passifs, soit des résistances et/ou des condensateurs, tous les éléments actifs tels que des bobines de self-induction qui consomment une puissance importante, ayant été supprimés. Les éléments montés dans les circuits peuvent être placés sur des plaquettes de circuit imprimé directement fixées à la carcasse des hauts-parleurs.The loudspeaker power supply circuit only includes passive elements, ie resistors and / or capacitors, all active elements such as self-induction coils which consume significant power, having been eliminated. The elements mounted in the circuits can be placed on printed circuit boards directly fixed to the carcass of the loudspeakers.

Claims (6)

1. Enceinte acoustique comportant un boîtier et au moins un haut-parleur logé dans ce boîtier, caractérisée en ce que le haut-parleur est à large bande passante, et en ce que son circuit d'alimentation comporte au moins l'un des deux éléments condensateur et résistance.1. Acoustic enclosure comprising a housing and at least one loudspeaker housed in this housing, characterized in that the loudspeaker has a large bandwidth, and in that its supply circuit comprises at least one of capacitor and resistance elements. 2. Enceinte acoustique selon la revendication 1, comportant plus- sieurs hauts-parleurs, caractérisée en ce que ces hauts-parleurs sont connectés en parallèle ou en série-parallèle.2. Acoustic enclosure according to claim 1, comprising more than one loudspeaker, characterized in that these loudspeakers are connected in parallel or in series-parallel. 3. Enceinte acoustique selon la revendication 2, caractérisée en ce que le circuit d'alimentation de certains hauts-parleurs comporte une résistance pure.3. Acoustic enclosure according to claim 2, characterized in that the power supply circuit of certain loudspeakers comprises a pure resistance. 4. Enceinte acoustique selon la revendication 2, caractérisée en ce que le circuit d'alimentation de certains hauts-parleurs comporte un condensateur.4. Acoustic enclosure according to claim 2, characterized in that the supply circuit of certain loudspeakers comprises a capacitor. 5. Enceinte acoustique selon la revendication 2, caractérisée en ce que le circuit d'alimentation de certains hauts-parleurs comporte une résistance et un condensateur connectés en parallèle.5. Acoustic enclosure according to claim 2, characterized in that the supply circuit of certain loudspeakers comprises a resistor and a capacitor connected in parallel. 6. Enceinte acoustique selon la revendication 1, caractérisée en ce que le boitier comporte une paroi antérieure composée d'au-moins deux faces planes formant un angle obtus entre elles, les hauts-parleurs étant encastrés dans lesdites faces planes.6. Acoustic enclosure according to claim 1, characterized in that the casing comprises a front wall composed of at least two planar faces forming an obtuse angle between them, the loudspeakers being embedded in said planar faces.
EP81440013A 1980-03-20 1981-03-19 Loudspeaker enclosure Withdrawn EP0036831A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8006287A FR2478926A1 (en) 1980-03-20 1980-03-20 ACOUSTIC SPEAKER
FR8006287 1980-03-20

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EP0036831A1 true EP0036831A1 (en) 1981-09-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238447A (en) * 1989-11-15 1991-05-29 Telford Miller Michael Emile A sound reproduction system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2405608A1 (en) * 1977-10-04 1979-05-04 Milot Gilles Speaker enclosure with front and internal loudspeakers - has internal speaker supplied with greater power via low-pass filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2405608A1 (en) * 1977-10-04 1979-05-04 Milot Gilles Speaker enclosure with front and internal loudspeakers - has internal speaker supplied with greater power via low-pass filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Funkschau, Vol. 43, No. 21, Novembre 1971 Munich (DE) F. KUHNE: "Renaissance der Lautsprechergruppe?", pages 701, 702. * page 701, colonne de gauche, lignes 23-29; figure 4 * *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238447A (en) * 1989-11-15 1991-05-29 Telford Miller Michael Emile A sound reproduction system

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FR2478926A1 (en) 1981-09-25
FR2478926B3 (en) 1982-12-31

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