Field of the invention
[0001] The present invention relates to loudspeaker arrangements for converting during use
a electric drive signal to acoustic radiation, which includes a panel and at least
one component cooperating with the panel to define an inner volume, where the panel
has mounted thereon at least one exciter element for operably causing said panel to
flex for generating acoustic radiation from said loudspeaker arrangement. Moreover,
the present invention also relates to methods of manufacturing such loudspeaker arrangements.
Background of the invention
[0002] Various types of acoustic transducers have been previously proposed and manufactured.
Contemporary commercial electromagnetic acoustic transducers each include a conical
member flexibly mounted within a support frame, the conical member being electromagnetically
actuated in respect of the support frame when in operation; an example of measuring
magnetic resonance for picture editing is described in published patent application
no.
US2007/0080687. In
US 2002/0114483 A1 there is described a speaker wiht a panel where to the exciter element is fastened
in order to make the panel vibrate and thus bring forth acoustic radiation from the
loudspeaker. Electromagnetic actuated speakers are robust and capable of handling
large amounts of drive power, for example approaching 1 kW, as well as transducing
signals to frequencies as low as 20 Hz and as high as 20 kHz for electromagnetic woofers
and tweeters respectively. However, a problem encountered in practice is that a conical
structure supported on a flexible mount exhibits complex resonance Eigenmodes at various
frequencies which causes sound colouration and reduced clarity in reproduced sounds.
[0003] Such colouration problems were appreciated many years ago and resulted in more exotic
types of loudspeaker, for example electrostatic loudspeakers as described in United
States patent no.
US 3, 773, 984 (Walker) from year 1973. An aim of such electrostatic speakers is not to obtain a planar
structure per se, but principally to obtain a far-field axis pressure which is frequency
independent, thereby providing an electrostatic loudspeaker that is acoustically transparent
over a complete audio frequency range. The electrostatic speakers need to be biased
with a potential in an order of hundreds of volts, even several kiloVolts in certain
product examples. The quality of sound reproduction from such loudspeakers is extremely
high, although it is sometimes found to be difficult to obtain adequate transducing
response at low frequencies below 100 Hz whereat large diaphragm excursions are potentially
required.
[0004] Use of piezo-electric elements to manufacture planar loudspeakers are also known,
for example as described in granted United States patent no.
US 7, 194, 098 B2 (Azima, New Transducers Ltd.). In this patent, embodiments comprise a box-like structure
including a flexible membrane onto which a piezo-electric element is asymmetrical
mounted. Such a planar loudspeaker suffers a problem of sound colouration due to a
complex series of resonance modes occurring in operation in a continuous planar membrane.
Summary of the invention
[0006] The present invention seeks to provide a loudspeaker arrangement which is capable
of providing an enhanced quality of sound reproduction in comparison to hitherto known
types of loudspeaker.
[0007] Thus the loudspeaker arrangement in accordance with the present invention is characterized
by that the panel includes one or more groups of one ore more apertures, where the
inner volume is connected fluidly with an external area to the speaker arrangement
by the one or more groups to the one or more apertures.
[0008] The invention is of advantage in that loudspeaker is capable via its slots of providing
an enhanced quality of sound reproduction.
[0009] Optionally, the loudspeaker arrangement is manufactured such that the at least one
exciter element includes a piezo-electric element. Piezo-electric elements are very
efficient at converting electrical energy to stress energy for straining flexible
structures such as the panel of the loudspeaker arrangement. More optionally, the
at least one exciter element is mounted symmetrically onto the panel.
[0010] Optionally, the loudspeaker arrangement is manufactured such that the one or more
groups of one or more slots are disposed in a rectilinear manner on the panel.
[0011] Optionally, the loudspeaker arrangement is manufactured such that the one or more
groups of one or more slots are disposed in a radial manner on the panel.
[0012] Optionally, the loudspeaker arrangement is manufactured such that the panel is implemented
in a rectilinear, triangular or ellipsoidal manner. Other geometrical manners of construction
for the panel are also feasible within the scope of the present invention.
[0013] Optionally, the loudspeaker arrangement is manufactured to be disposed in combination
with other loudspeakers to provide a loudspeaker unit. Such a manner of construction
for the loudspeaker unit is capable of enable extremely high quality sound reproduction
whilst providing an extended frequency response encompassing, for example, the full
audible range of frequencies, for example 20 Hz to 20 kHz.
[0014] Optionally, the loudspeaker arrangement is provided with one or more rear vents to
provide a back reflex loudspeaker configuration. Utilization of the one or more rear
vents is capable of enhancing bass response of the loudspeaker arrangement and/or
increasing its acoustic efficiency for converting electrical drive signals to corresponding
acoustic energy.
[0015] Optionally, the loudspeaker arrangement may be mounted in a wire system or on adjustable
spacers mounted to a wall - then without an inner volume/box. The distance and angle
to the back wall has the same function as a physical frame/box around the speaker.
In other words, one achieves the same increased bass response as an inner volume.
The spacers may optionally be fitted with one or more springs/shock absorbing units
(gaskets) in order to stop the transfer of vibrations to the fastening point in the
existing construction.
[0016] Optionally, the loudspeaker arrangement is implemented so that the at least one component
cooperating with the panel is provided with one or more projections for scattering
acoustic energy within the inner volume for reducing occurrence of standing acoustic
waves therein when the arrangement is in operation. Utilization of the one or more
projections is capable of reducing occurrence of standing waves within the inner volume
and hence improving flatness of frequency response provided by the loudspeaker arrangement.
[0017] Further, the method according to the present invention is characterized by that the
method includes:
- (a) manufacturing a front panel including one or more groups of one or more apertures;
- (b) mounting at least one exciter element to the front panel;
- (c) assembling one or more components to the panel to define an internal volume in
fluid communication via the one or more groups of one or more apertures to a region
external to the loudspeaker arrangement.
[0018] The steps (a) to (c) are susceptible to being implemented in various sequences whilst
still representing an implementation of the invention.
[0019] It will be appreciated that features of the invention are susceptible to being combined
in any combination without departing from the scope of the invention.
Description of the diagrams
[0020] Embodiments of the present invention will now be described, by way of example only,
with reference to the following diagrams wherein:
- FIG. 1
- is an illustration of a first embodiment of a loudspeaker arrangement pursuant to
the present invention;
- FIG. 2
- is an illustration of a second embodiment of a loudspeaker arrangement pursuant to
the present invention;
- FIG. 3
- is an illustration of a third embodiment of a loudspeaker arrangement pursuant to
the present invention;
- FIG. 4
- is an illustration of a first configuration of loudspeakers mounted into a loudspeaker
cabinet pursuant to the present invention;
- FIG. 5
- is an illustration of a second configuration of loudspeakers in a hanging arrangement
to provide an elongate spatially-distributed sound source;
- FIG. 6
- is an illustration of a fourth embodiment of a loudspeaker arrangement pursuant to
the present invention, the embodiment employing a concave back panel;
- FIG. 7
- is an illustration of fifth embodiment of a loudspeaker arrangement pursuant to the
present invention including one or more rear vents in reflex configuration;
- FIG. 8
- is an illustration of a sixth embodiment of a loudspeaker arrangement pursuant to
the present invention including one or more rear vents in reflex configuration with
a profiled back panel for reducing standing resonances by way of standing waves within
the loudspeaker arrangement; and
- FIG. 9
- is an illustration of a seventh embodiment of a loudspeaker arrangement pursuant to
the present invention constructed in an open form with flexible material side panels.
[0021] In the accompanying diagrams, an underlined number is employed to represent an item
over which the underlined number is positioned or an item to which the underlined
number is adjacent. A non-underlined number relates to an item identified by a line
linking the non-underlined number to the item. When a number is non-underlined and
accompanied by an associated arrow, the non-underlined number is used to identify
a general item at which the arrow is pointing.
Description of embodiments of the invention
[0022] In describing the present invention, the expression "loudspeaker" is used to refer
to all types of transducer capable of converting an electrical signal into corresponding
acoustic pressure waves, for example which can be received by the human ear.
[0023] Referring to FIG. 1, there is shown a loudspeaker arrangement pursuant to the present
invention. The loudspeaker arrangement is indicated generally by
10. The loudspeaker arrangement includes a front panel
20 coupled to a back component
30. The back component
30 is optionally stiffened with base ridges
40A and side ridges
40B for enhancing its mechanical rigidity. The ridges
40A, 40B are optionally mutually parallel, alternatively mutually diagonal and/or mutually
perpendicular. The back component
30 is beneficially at least one of: cast, machined, moulded, pressed, thermally formed
and explosively formed. The back component
30 is beneficially fabricated from at least one of:
- (a) metal, for example aluminium or steel;
- (b) plastics material, for example acrylic plastics material or filled plastics material;
- (c) wood, for example beechwood;
- (d) reinforced carbon fibre or reinforced fibreglass;
- (e) concrete, stone or glass.
[0024] Side walls of the back component
30 are beneficially implemented in a tapered manner as illustrated. The front panel
20 is beneficially manufactured from at least one of:
- (i) plastics material, for example acrylic plastics material, polypropylene, nylon,
Teflon, PTFE, Perspex;
- (ii) sheet metal, for example with slots punched therein; and
- (iii) flexible wood, for example willow wood.
[0025] A piezo-electric exciter
50 is beneficially mounted to the panel
20 as illustrated; beneficially, the exciter
50 is centrally mounted to the panel
20 although asymmetrical mounting is also feasible. The exciter element may of course
also be any exciting element, such as an electromagnetic exciter element. A configuration
of one or more groups of one or more slots
60 are formed into the front panel
20, namely penetrating through a depth of the front panel
20. The slots function as apertures in the front panel
20. Each slot is capable of functioning as an individual acoustic radiation source, such
that speaker arrangement
10 thereby corresponds to an array of a plurality of minute acoustic radiation emitters. Optionally,
there are provided at least two groups of slots
60. Optionally, each group includes at least two slots, for example in a range of 2 to
100 slots. Each slot is about 0,05 to 3 mm wide. Each slot is beneficially in a range
of 0.5 to 3 mm wide. Each slot has a lenght:width ration of 2:1 to 500:1. Optionally,
each slot has a length:width ratio in a range 2:1 to 50: 1. Optionally, the slots
60 are of mutually different length and/or mutually different width, for example tapered
along a length of a group. The slots (holes) defines rays/columns, and it is advantageous
for these to be long, since long slots define elongated columns between each other
the hight to width ratio for the columns themselves is preferably in the area of 1:2
to 1:30. The one or more groups of one or more slots
60 are beneficially disposed symmetrically around the piezo-electric exciter
50. The slots
60 are beneficially laser cut and/or mechanically cut and/or moulded. Mechanical cutting
is beneficially performed by a row of circular cutting blades mounted to a common
spindle. Moreover, mechanical cutting is potentially faster in manufacture than laser
cutting and also provided a benefit of utilizing less capitally-intensive apparatus.
Beneficially, the one or more groups of one or more slots
60 provide a path for fluid communication from an interior region
80 of the loudspeaker
10 to an external region
90 surrounding the loudspeaker
10.
[0026] The front panel
20 is attached to the back component
30 by at least one of: screws, adhesives, friction welding, rivets, snap-connections,
although other fixing methods can be employed. A peripheral region of the front panel
20 is provided with fastening points or holes
70 for use when mounting the loudspeaker arrangement
10 to cabinets, enclosures and so forth.
[0027] Alternatively, the speaker arrangement
10 is optionally implemented in circular format as illustrated in FIG. 2 as indicated
by
100. The speaker arrangement
100 includes the front panel
20 implemented in ellipsoidal form, for example circular form. The one or more groups
of one or more slots
60 are beneficially disposed in an arrangement as illustrated, namely in a symmetrical
form of arrays of slots
60. Alternatively, the one or more groups of one or more slots
60 are disposed in a radial manner around the piezo-electric exciter
50 as illustrated in FIG. 3. Moreover, the back component
30 is beneficially implemented in a substantially hemispherical or hemi-ellipsoid form
as illustrated. The advantage of the speaker arrangement
100 is that it can be manufactured to be a form-fit replacement for conventional round-format
electromagnetically-actuated loudspeakers. Optionally, the back component
30 includes one or more ridges
40 for rendering the back component
40 stiffer. Optionally, the one or more ridges
40 of the speaker arrangement
100 are implemented in a radially-symmetrical manner.
[0028] The speaker arrangement
10, 100 is capable of being used in high fidelity applications because of its reduced degree
of sound colouration and wide acoustic energy dispersion characteristic in comparison
to conventional electromagnetically-actuated cone-diaphragm loudspeakers. The speaker
arrangement
10, 100 is capable of being mounted within a cabinet or enclosure and driven by a signal
from an electronic amplifier. Optionally, especially when the back component
20 is manufactured from a heat-conducting metal such as aluminium, such an amplifier
is mounted to the back component
20 so that the amplifier is cooled by fluidic dissipation synergistically occurring,
at least in part, through the one or more groups of one or more slots
60 to the external region
90.
[0029] Optionally, configurations of a plurality of the loudspeaker arrangements
10, 100 can be mounted into a cabinet or enclosure to provide more acoustic output. Optionally,
the plurality of the loudspeaker arrangements
10, 100 are of mutually different size to provide an extended frequency response range.
[0030] Referring to FIG. 4, the speaker arrangement
10 is susceptible to being mounted in a multi-speaker arrangement as indicated by
200. The multi-speaker arrangement
200 includes a cabinet
210 into which the speaker arrangement
10 together with a tweeter
220 and an electromagnetically-actuated woofer
230 are also mounted for example. Optionally, the speaker arrangement
10 is coupled in parallel with the woofer
230 and the tweeter
220 fed via a capacitor
240 to function as a simple high-pass filter formed with a resistance of the tweeter
220; by such a parallel arrangement, optimal loudspeaker damping can be achieved and thereby
superlative sound reproduction performance. Optionally, the speaker arrangement
10 is replaced by the speaker arrangement
100.
[0031] The speaker arrangement
10, 100 is beneficially disposed in plurality in vertical speaker towers in use for providing
superlative acoustic clarity as well as impressive stereo image. For example, in FIG.
5 there is shown a hanging arrangement of the loudspeaker arrangements
10 suspended by flexible supports
330, for example chains, from a wall-mounted support bracket
340 mounted to one or more walls
310 of a room with ceiling
320. The hanging arrangement is indicated generally by
300 in FIG. 5.
[0032] In FIG. 2, the back component
30 is illustrated having a concave profile in a loudspeaker arrangement indicated generally
by
400. Alternatively, the back component
30 has a convex profile an illustrated in FIG. 6 to obtain a wider angle of sound dispersion
from the loudspeaker arrangement
400.
[0033] In FIG. 7, there is shown a back reflex configuration for the loudspeaker arrangement
10. The back reflex configuration is indicated generally by
500 and includes one or more rear ports
520 as additional paths through which sound generated by the piezo-electric exciter
50 cooperating with the front panel
20 is able to exit. The one or more ports
520 are beneficially provided between one or more side portions and a rear panel
510. Optionally, the one or more side portions coupled to the front panel
20 are also provided with one or more piezo-electric exciters
50 for being excited by a drive signal. Optionally, one or more vents are provided in
the rear panel
510.
[0034] In FIG. 8, there is shown a modified version of the back reflex configuration
500, wherein the modified version is indicated generally by
600. The modified version of the back reflex configuration employs a rear panel
610 including a plurality of up-standing projections
630 for causing complex scattering of acoustic energy received at the rear panel
610 to assist to reduce occurrence of standing acoustic waves which can result in an
uneven frequency response for converting drive signals applied to the piezo-electric
exciter
50 into acoustic energy radiated from the modified back reflex configuration
600. Optionally, the back reflex configuration includes one of more side vents
620 as illustrated.
[0035] In FIG. 7 and FIG. 8, use of back reflex configuration
500, 600 is beneficially capable of enhancing bass response, for example at frequencies below
80 Hz present in the drive signal applied to excite the piezo-electric exciter
50.
[0036] In FIG. 9, there is shown a simple configuration for the speaker arrangement
10; the simple arrangement is indicated by
700 and comprises the front panel
20 with its associated one or more groups of one or more slots
60 together with its piezo-electric exciter
50. The front panel
20 includes at its extremities one or more support members
710. One or more of sides of a volume behind the front panel
20 is bounded by one or more flexible fabric covers
720, for example woven fabric. The simple arrangement
700 for the loudspeaker arrangement
10 is potentially inexpensive to manufacture and of potentially low weight. The simple
arrangement
700 can, for example, be attached to ceilings and walls of rooms, for example by hanging
the simple arrangement
700 onto hooks or screws secured to the ceilings and/or walls.
[0037] Optionally, the piezo-electric exciter
50 is implemented in alternative manners, for example by utilizing an electromagnetic
flexing module, or stacks of multiple piezoelectric elements.
[0038] Although rectilinear and ellipsoidal implementation of the front panel
20 is described in the foregoing, the front panel
20 is capable of having other geometrical forms, for example being of triangular or
polygonal form.
[0039] Numerals included within parentheses in the accompanying claims are intended to assist
understanding of the claims and should not be construed in any way to limit subject
matter claimed by these claims.
1. A loudspeaker arrangement (10, 100) for converting in operation an electrical drive
signal to acoustic radiation, that includes a panel (20) and at least one component
(30) cooperating with the panel (20) to define an inner volume (80) wherein said panel
(20) has mounted thereon at least one exciter element (50) for operably causing said
panel (20) to flex for generating acoustic radiation from said loudspeaker arrangement
(10, 100),
characterized in that
the panel (20) includes one or more groups of apertures (60) arranged to define elongate
members there between, where the inner volume (80) is coupled in fluidic communication
with an external region (90) to the loudspeaker arrangement (10, 100) via said one
or more groups of apertures (60).
2. A loudspeaker arrangement (10, 100) as claimed in claim 1, wherein said at least one
exciter element (50) includes a piezo-electric element.
3. A loudspeaker arrangement (10, 100) as claimed in claim 1, wherein said at least one
exciter element (50) is an electro magnetic exciter element.
4. A loudspeaker arrangement (10, 100) as claimed in claim 2 or 3, herein said at least
one exciter element (50) is mounted symmetrically onto said panel (20).
5. A loudspeaker arrangement (10, 100) as claimed in claim 1, wherein the apertures(s)
are implemented as slots (60) disposed in a rectilinear manner on said panel (20).
6. A loudspeaker arrangement (10, 100) as claimed in claim 1, wherein the apertures(s)
are implemented as slots (60) disposed in a radial manner on said panel (20).
7. A loudspeaker arrangement (10, 100) as claimed in claim 1, wherein said panel (20)
is implemented in a rectilinear, triangular, ellipsoidal or polygonal manner.
8. A loudspeaker arrangement (10, 100) as claimed in claim 1 disposed in combination
with other loudspeakers to provide a loudspeaker unit (200).
9. A loudspeaker arrangement (10, 500, 600) as claimed in claim 1 provided with one or
more rear vents to provide a back reflex loudspeaker configuration.
10. A loudspeaker arrangement (10, 600) as claimed in claim 1, wherein the at least one
component (30) cooperating with the panel (20) is provided with one or more projections
for scattering acoustic energy within the inner volume (80) for reducing occurrence
of standing acoustic waves therein when the arrangement (10, 600) is in operation.
11. A method of manufacturing a loudspeaker arrangement (10, 100) as claimed in claim
1, said method including:
(a) manufacturing a front panel (20) including one or more groups of apertures (60)
arranged to defme elongate members there between;
(b) mounting at least one exciter element (50) to said front panel (20);
(c) assembling one or more components (30) to said panel (20) to define an internal
volume (80) in fluid communication via said one or more groups of apertures (60) to
a region external to said loudspeaker arrangement (10, 100).
1. Lautsprecheranordnung (10, 100) zur Umwandlung im Betrieb eines elektrischen Treibersignals
in akustische Strahlung, wobei die Lautsprecheranordnung ein Panel (20) beinhaltet
und wenigstens ein Bauteil (30), welches mit dem Panel (20) zusammenwirkt, um ein
inneres Volumen (80) zu definieren, wobei auf dem Panel (20) wenigstens ein Erregerelement
(50) montiert ist, um operabel dafür zu sorgen, dass sich das Panel (20) zur Erzeugung
akustischer Strahlung von der Lautsprecheranordnung (10, 100) biegt,
dadurch gekennzeichnet, dass
das Panel (20) eine oder mehrere Gruppen von Öffnungen (60) beinhaltet, welche angeordnet
sind, lang gestreckte Elemente dazwischen zu definieren, wo das innere Volumen (80)
in Fluid-Kommunikation mit einem externen Bereich (90) der Lautsprecheranordnung (10,
100) über die eine oder die mehreren Gruppen von Öffnungen (60) gekoppelt ist.
2. Lautsprecheranordnung (10, 100), wie sie in Anspruch 1 beansprucht wird, wobei das
wenigstens eine Erregerelement (50) ein piezoelektrisches Element beinhaltet.
3. Lautsprecheranordnung (10, 100), wie sie in Anspruch 1 beansprucht wird, wobei das
wenigstens eine Erregerelement (50) ein elektromagnetisches Erregerelement ist.
4. Lautsprecheranordnung (10, 100), wie sie in Anspruch 2 oder 3 beansprucht wird, wobei
das wenigstens eine Erregerelement (50) symmetrisch auf dem Panel (20) montiert ist.
5. Lautsprecheranordnung (10, 100), wie sie in Anspruch 1 beansprucht wird, wobei die
Öffnung(en) als Schlitze (60) implementiert sind, welche geradlinig auf dem Panel
(20) angeordnet sind.
6. Lautsprecheranordnung (10, 100), wie sie in Anspruch 1 beansprucht wird, wobei die
Öffnung(en) als Schlitze (60) implementiert sind, welche radial auf dem Panel (20)
angeordnet sind.
7. Lautsprecheranordnung (10, 100), wie sie in Anspruch 1 beansprucht wird, wobei das
Panel (20) geradlinig, dreieckig, elliptisch oder polygonal implementiert ist.
8. Lautsprecheranordnung (10, 100), wie sie in Anspruch 1 beansprucht wird, welche in
Kombination mit anderen Lautsprechern angeordnet ist, um eine Lautsprechereinheit
(200) zur Verfügung zu stellen.
9. Lautsprecheranordnung (10, 500, 600), wie sie in Anspruch 1 beansprucht wird, welche
mit einem oder mehreren rückwärtigen Luftdurchlässen versehen ist, um eine Rückwirkungslautsprecherkonfiguration
zur Verfügung zu stellen.
10. Lautsprecheranordnung (10, 600), wie sie in Anspruch 1 beansprucht wird, wobei das
wenigstens eine Bauteil (30), welches mit dem Panel (20) zusammenwirkt, mit einem
oder mehreren Vorsprüngen zum Streuen akustischer Energie innerhalb des inneren Volumens
(80) versehen ist, um das Auftreten stehender akustischer Wellen darin zu vermindern,
wenn die Anordnung (10, 600) in Betrieb ist.
11. Verfahren zur Herstellung einer Lautsprecheranordnung (10, 100), wie sie in Anspruch
1 beansprucht wird, wobei das Verfahren beinhaltet:
(a) Herstellen eines vorderen Panels (20) beinhaltend eine oder mehrere Gruppen von
Öffnungen (60), welche angeordnet sind, um dazwischen lang gestreckte Elemente zu
definieren;
(b) Montieren wenigstens eines Erregerelements (50) an dem vorderen Panel (20);
(c) Zusammenbauen eines oder mehrerer Bauteile (30) zu dem Panel (20), um ein internes
Volumen (80) in Fluid-Kommunikation über die eine oder die mehreren Gruppen von Öffnungen
(60) zu einem Bereich außerhalb der Lautsprecheranordnung (10, 100) zu definieren.
1. Arrangement de haut-parleurs (10, 100) pour convertir en fonctionnement un signal
d'entraînement électrique en radiation acoustique, qui inclut un panneau (20) et au
moins un composant (30) coopérant avec le panneau (20) pour définir un volume interne
(80) où sur le dit panneau (20) est monté au moins un élément excitant (50) pour commander
de manière fonctionnelle la flexion du dit panneau (20) afin de générer une radiation
acoustique à partir du dit arrangement de haut-parleur (10, 100), caractérisé en ce que ledit panneau (20) inclut un ou plusieurs groupes d'ouvertures (60) placés de manière
à définir des éléments allongés entre eux, où le volume interne (80) est couplé en
communication fluide avec une région externe (90) à l'arrangement de haut-parleur
(10, 100) via le dit un ou plusieurs groupes d'ouvertures (60).
2. Arrangement de haut-parleur (10, 100) selon la revendication 1, caractérisé en ce que le dit au moins un élément excitant (50) inclut un élément piézo-électrique.
3. Arrangement de haut-parleur (10, 100) selon la revendication 1, caractérisé en ce que le dit au moins un élément excitant (50) est un élément excitant électromagnétique.
4. Arrangement de haut-parleur (10, 100) selon la revendication 2 ou 3, caractérisé en ce que le dit au moins un élément excitant (50) est monté de manière symétrique sur le dit
panneau (20).
5. Arrangement de haut-parleur (10, 100) selon la revendication 1, caractérisé en ce que les ouvertures sont réalisées sous forme de fentes (60) placées de manière rectiligne
sur le dit panneau (20).
6. Arrangement de haut-parleur (10, 100) selon la revendication 1, caractérisé en ce que les ouvertures sont réalisées sous forme de fentes (60) placées de manière radiale
sur le dit panneau (20).
7. Arrangement de haut-parleur (10, 100) selon la revendication 1, caractérisé en ce que le dit panneau (20) est réalisé de manière rectiligne, triangulaire, ellipsoïdale
ou polygonale.
8. Arrangement de haut-parleur (10, 100) selon la revendication 1, placé en combinaison
avec d'autres haut-parleurs pour créer une unité de haut-parleurs (200).
9. Arrangement de haut-parleur (10, 500, 600) selon la revendication 1, équipé d'une
ou plusieurs orifices à l'arrière pour fournir une configuration de haut-parleur réflexe
arrière.
10. Arrangement de haut-parleur (10, 600) selon la revendication 1, caractérisé en ce que le dit au moins un composant (30) coopérant avec le panneau (20) est pourvu d'une
ou plusieurs projections pour disperser l'énergie acoustique dans le volume interne
(80) afin de réduire l'occurrence d'ondes acoustiques fixes à l'intérieur quand l'arrangement
(10, 600) est en fonctionnement.
11. Méthode de fabrication d'un arrangement de haut-parleur (10, 100) selon la revendication
1, la dite méthode comprenant :
(a) la fabrication d'un panneau avant (20) incluant un ou plusieurs groupes d'ouvertures
(60) placés de manière à définir des éléments allongés entre eux,
(b) le montage d'au moins un élément excitant (50) sur le dit panneau avant (20),
(c) l'assemblage d'un ou plusieurs composants (30) sur le dit panneau (20) afin de
définir un volume interne (80) en communication fluide à travers le dit un ou plusieurs
groupes d'ouvertures (60) avec une région externe au dit arrangement de haut-parleur
(10, 100).