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EP 2 486 202 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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26.06.2013 Bulletin 2013/26 |
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Date of filing: 08.10.2009 |
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International Patent Classification (IPC):
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International application number: |
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PCT/IB2009/007104 |
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International publication number: |
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WO 2011/042768 (14.04.2011 Gazette 2011/15) |
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ACOUSTIC PANEL
AKUSTISCHE PLATTE
PANNEAU ACOUSTIQUE
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Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO
PL PT RO SE SI SK SM TR |
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Date of publication of application: |
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15.08.2012 Bulletin 2012/33 |
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Proprietor: Brown, Petter |
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3222 Sandefjord (NO) |
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Inventor: |
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- Brown, Petter
3222 Sandefjord (NO)
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Representative: Lekova, Tatyana Boyanova |
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136, Hristo Botev Boulevard 1202 Sofia 1202 Sofia (BG) |
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References cited: :
GB-A- 1 447 588 US-A1- 2008 034 876
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US-A- 5 303 526
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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Technical field
[0001] The present invention is related to an acoustic panel used for the creation of acoustic
waves in a solid body corresponding to music and/or speech and for the development
of dancing floors or training platforms for hearing impaired people.
Technical Background
[0002] GB 1447588 (A) describes a dancing floor that includes at least one floor panel resiliently mounted
on a firm foundation and having an electro-mechanical transducer fixed to its underside
so as to convert electrical audio-frequency power supplied and modulated with dance
music into mechanical vibrations. The panel may be of wood or wood composition board
or of plastics. The transducer is attached to the back side of the board which is
mounted on sound absorbing material surrounded by safety frames formed of rigid and
resilient material respectively.
[0003] The described panel cannot reproduce mechanical vibrations that strictly correspond
to the acoustic signal of the entire frequency range of acoustic signal modulation
do to the positioning of a transducer (of speaker type) under the central part of
the floor panel, and as a result, the resilient connection between the solid bottom
and the acoustic board has constant solidity that cannot be changed when changing
the frequency range of the acoustic signal.
Technical description of the invention
[0004] This invention is aimed at the development of an acoustic panel that allows more
precise reproduction of acoustic signal by means of mechanical vibrations in an extended
frequency range of the acoustic signal modulation.
[0005] The objective is achieved by using an acoustic panel that includes solid foundation,
above which there is a board resiliently mounted on the foundation. The panel characterizes
in that at the foundation there is an electrodynamic system mounted with an even number
of poles created by at least one constant magnet. Around each pole a modulating coil
is placed. On the foundation there are at least three support sockets fixed, each
of which has an internal hole in its upper part where an elastic heel is loosely mounted
which is fixed to the board, and the board is made of magnetic soft material.
[0006] In one embodiment of the acoustic panel the constant magnet is formed by segments
with serial alternating poles.
[0007] In another embodiment there are four magnets forming four magnetic chains with joint
poles.
[0008] In this embodiment it is appropriate to form the joint poles with a separate magnetic
core around which a modulating coil is placed.
[0009] In another embodiment of the acoustic panel in each corner of the foundation a support
socket is placed with a formed internal hole in the upper part in which a loosely
mounted elastic heel is placed respectively, attached to the board.
[0010] The advantages of the acoustic panel according to the invention are related to the
delivery of more precise reproduction of the acoustic signal as mechanical vibrations
in an extended range of the acoustic signal modulation. On the one hand, this is because
of the use of additional magnetic field of constant magnets which reduces the hysteresis
of the electromagnetic transducer. On the other hand, the use of a resilient heel,
loosely mounted at the hole of the support socket, by supporting the board of the
acoustic panel, it allows to achieve different hardness of the vibration system loaded
with the human body weight over the board on the one hand, and on the other hand -
with the equivalent magnetic power of the modulating impact of the acoustic signal.
Description of the attached figures
[0011]
Figure 1 is an axonometric image of the acoustic panel according to the invention;
Figure 2 is a cutaway diagram through the support socket;
Figure 3 shows the basic embodiment of the acoustic panel with one magnetic chain
Examples of particular embodiment
[0012] The acoustic panel (fig. 1 and 3) consists of a solid foundation 1 over which a board
is placed (membrane) 2, resiliently mounted on the foundation 1. On the foundation
there is a mounted system of at least one constant magnet 3 with poles N and S 4,
around which there is a modulating coil 5. On the foundation 1 there are at least
three support sockets 6 fixed, having an internal hole 7 in its upper part where a
resilient heel 8 is loosely mounted.
[0013] It is possible in the area of the poles 4 to mount a separate magnetic core 9 around
which a modulating core 5 is placed.
It is possible to form the constant magnets 3 with segments 20 with serial alternating
poles.
[0014] In the most preferred embodiment shown in axonometry on Figure 1 the magnets 3 are
four, and joint poles 4 are formed in the four tops of the system among which the
magnetic core 9 is set. In this embodiment the foundation 1 and the board 2 have quadrangular
shape, and square shape is preferred.
[0015] In order to assure sufficient solidness of the acoustic panel, in each corner of
the foundation 1 a support socket 6 with an internal hole 7 in the upper part can
be placed, where a resilient heel 8 is loosely mounted and attached on the board 2.
Use of the invention
[0016] The acoustic panel according to the invention is used to develop dance floors suitable
for hearing impaired and deaf people. The panel is also suitable for training or educational
purposes for the same group of people, e.g. a seat, back of a chair or similar tools.
[0017] On supplying electrical signal that is frequency and amplitude modulated with any
acoustic signal (for example, music or speech), at the coils 5 of the electro dynamic
system, in the magnetic core 9 alternating magnetic field is generated which combined
with the magnetic field of the constant magnets 3 is closed through the magnetic soft
board 2 and creates forces of attraction or repulsion of the board 2 towards the magnetic
core 9, and thus it forces vibrations of the board 2 in two directions with respect
to the static condition of the platform when the acoustic panel is loaded with a person
in conformity with the amplitude and the frequency of the acoustic signal.
[0018] When the board 2 moves downwards towards the foundation 1 under the force of one
half wave of the amplitude-frequency modulated signal, as a result of the filled looseness
between the heel 8 and the socket 6 because of the deformation of the resilient heel
8, the system hardens and the board 2 vibration is in conformity with the high-frequency
component of the acoustic signal. Alternatively, the board moves upwards from the
foundation 1 under the force of the other half wave of the amplitude-frequency modulated
signal, as a result of created looseness between the heel 8 and the socket 6, the
system softens and reproduces a low-frequency component (part) of the acoustic signal.
1. An acoustic panel that consists of a solid foundation (1) on which a board (2) is
placed characterised in that the board is resiliently mounted on the foundation and at the foundation (1) electrodynamic
system is mounted with an even number of poles (4), formed by at least one constant
magnet (3), and around each pole (4) there is a modulating coil (5), and at the foundation
(1) there are at least three support sockets (6) fixed, and each of them has an internal
hole (7) in its upper part where there is a loosely mounted resilient heel (8) attached
to the board (2), and the board is made of magnetic soft material.
2. An acoustic panel according to claim 1, characterized in that the constant magnets (3) are formed by segments (10) with serial alternating poles.
3. An acoustic panel according to claim 1, characterized in that the magnets (3) are four in number and they form four magnetic chains with joint
poles (4).
4. An acoustic panel according to claim 3, characterized in that the joint poles (4) are formed by a separate magnetic core (9), around which a modulating
coil is placed (5).
5. An acoustic panel according to claims 1-4, characterized in that on each corner of the foundation (1) a support socket is mounted (6) with an internal
hole (7) in its upper part in which a resilient heel (8) is loosely mounted and is
attached to the board (2).
1. Eine Akustikplatte, die aus einem festen Fundament (1) besteht, auf dem ein Brett
(2) platziert ist, und durch Folgendes charakterisiert ist: Das Brett (2) ist federnd
auf dem Fundament montiert, am Fundament (1) ist ein elektrodynamisches System mit
einer geraden Anzahl an Polen (4) montiert, die von mindestens einem Permanentmagneten
(3) gebildet werden. Um jeden Pol (4) ist eine modulierende Spule (5) angebracht,
und am Fundament (1) sind mindestens drei Stützsockel (6) befestigt, je mit einer
Innenbohrung (7) im oberen Teil, in der sich ein lose montierter federnder Zapfen
(8) befindet, der am Brett (2) befestigt ist. Das Brett besteht aus weichmagnetischem
Material.
2. Eine Akustikplatte gemäß Anspruch 1, die durch Folgendes charakterisiert ist: Die
Permanentmagnete (3) werden durch Segmente (10) mit seriellen wechselnden Polen gebildet.
3. Eine Akustikplatte gemäß Anspruch 1, die durch Folgendes charakterisiert ist: Es sind
insgesamt vier Magnete (3) vorhanden, die vier Magnetketten mit verbundenen Polen
(4) bilden.
4. Eine Akustikplatte gemäß Anspruch 3, die durch Folgendes charakterisiert ist: Die
verbundenen Pole (4) werden durch einen separaten Magnetkern (9) gebildet, um den
eine modulierende Spule (5) angebracht ist.
5. Eine Akustikplatte gemäß den Ansprüchen 1 bis 4, die durch Folgendes charakterisiert
ist: An jeder Ecke des Fundaments (1) ist ein Stützsockel (6) mit einer Innenbohrung
(7) in seinem oberen Teil montiert, in der ein federnder Zapfen (8) lose montiert
ist, der am Brett (2) befestigt ist.
1. Un panneau acoustique composé d'une couche solide (1) sur laquelle repose une membrane
(2) flottante constitué d'un matériau magnétique doux, ainsi qu'un système électrodynamique
constitué d'au moins un aimant constant (3) et comportant un nombre pair de pôles
(4) autour desquels figure une bobine de modulation (5) ; la couche solide (1) se
caractérise également par un minimum de trois supports (6) fixes dotés chacun d'un
orifice interne (7) dans sa partie supérieure où vient se loger un talon (8) flottant
rattaché à la membrane (2).
2. Un panneau acoustique conformément à la revendication 1, caractérisé par le fait que les aimants constants (3) soient formés par des segments (10) avec alternance en
série des pôles.
3. Un panneau acoustique conformément à la revendication 1, caractérisé par le fait que les aimants constants (3), au nombre de quatre, forment quatre chaînes magnétiques
avec des pôles communs (4).
4. Un panneau acoustique conformément à la revendication 1, caractérisé par le fait que les pôles communs (4) sont formés par un noyau magnétique (9) distinct autour duquel
est placée une bobine de modulation (5).
5. Un panneau acoustique conformément aux revendications 1 à 4, caractérisé par le montage, à chaque coin de la couche solide (1), d'un support (6) doté d'un orifice
interne (7) en sa partie supérieure, dans lequel repose un talon (8) flottant rattaché
à la membrane (2).
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description