Soundproofing element and soundproofing wall

Acoustics – Sound-modifying means – Sound absorbing panels

Reexamination Certificate

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Reexamination Certificate

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06609591

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to a soundproofing element. More particularly, the invention relates to a first sheet of flexible material, and a second sheet of flexible material; the first and second sheets being positioned at a distance from another and connected to each other at the surfaces facing one another by a connector; at least one chamber being formed between the first and second sheets for receiving a filler medium.
BACKGROUND OF THE INVENTION
Soundproofing elements, for instance in the form of soundproofing walls, are generally known, and serve as sound insulation, such as for the insulation of traffic noise, construction noise, or noise in factories.
Soundproofing elements are known from DE 30 04 102 C2 and DE 42 30 786 A1, that are essentially rigidly constructed. Although these soundproofing elements provide very effective soundproofing, their disadvantage, however, is that they are hard to handle due to their large weight.
A soundproofing element is known from DE 196 52 871 C2, that possess a first sheet consisting of flexible material, and a second sheet of flexible material, whereby the sheets are positioned at a distance from one another and at least one chamber is formed between the sheets for receiving a filler medium. In the known soundproofing element, the sheets are constructed in the form of a flexible jacket that can be inflated with air or other gases as the filler medium. One disadvantage of the known soundproofing element is that the sound insulating effect is low due to the gaseous filler medium.
A similar soundproofing element is also known by DE 44 22 585 C1.
A soundproofing material is known from DE 41 31 394 A1 that is essentially rigidly constructed, and possesses two cover layers, between which a core layer is positioned.
Furthermore, a soundproofing material is known from DE 40 40 583 A1 that consists of plastic hollow sections in which, or between which, wastewater sludge is placed.
A soundproofing mat is known from DE 83 09 535 U1 that possesses two layers of plastic foil, between which chambers are constructed for receiving a sound insulating work material.
A soundproofing element of the relevant type is known from the magazine
Schweizer Ingenieur und Architekt
[“Swiss Engineer and Architect,”] 38/1984, page 718, that possesses a first sheet consisting of flexible material, and a second sheet consisting of flexible material, whereby the sheets are positioned at a distance from one another, and whereby the first sheet and the second sheet are connected by connection means located on opposing surfaces. The sheets in the known soundproofing element are constructed of a spacer fabric, the spacer threads or the pole threads of which form the connecting means for the connection of the sheets to one another. The flexible soundproofing wall constructed in this way possesses excellent sound insulating characteristics. However, a disadvantage is that their production is complicated, and therefore expensive. Another disadvantage is that the known soundproofing element can be produced at only a short maximum width.
The invention further relates to a soundproofing wall of the type having a first soundproofing element, and at least a second soundproofing element.
Such a soundproofing wall is known from GB 2 305 451 A. It possesses a first soundproofing element, and at least a second soundproofing element, whereby the first soundproofing element and the second soundproofing element are arranged in neighboring proximity to each other, and whereby additional soundproofing means are intended that span an area in which the first and the second soundproofing elements are in neighboring proximity to each other, by soundproofing it. The additional soundproofing means on the soundproofing wall known from the specification are constructed of cover panels that are connected to a supporting pole of the soundproofing wall by means of screws or rivets. One disadvantage is that this construction is complicated in its production, and therefore expensive, and that the cover panel possesses only a low soundproofing effect.
Similar soundproofing walls are also known from DE 295 13 248 U1, DE 91 13 416.1 U1, DE 197 32 904 A1, and DE 86 12 223 U1.
The invention is based on the task of stating a soundproofing element and a soundproofing wall with simplified production methods, that is therefore constructed less expensive, and with which a high soundproofing effect can be achieved.
This task with regard to the soundproofing elements is solved by the inventive teaching of a first sheet of flexible material, and a second sheet of flexible material; the first and second sheets being positioned at a distance from one another and connected to each other at surfaces facing one another by a connector; at least one chamber being formed between the first and second sheets for receiving a filler medium; the connector possessing at least one connecting length including a flexible material; the connecting length being connected to the first sheet and the second sheet in such a way that a multitude of chambers is formed that are arranged next to each other; and the chambers being separate from each other, and each possessing a lockable fill opening for the filler medium that can be locked, and with regard to the soundproofing wall, by the inventive teaching feature of a soundproofing wall, with a first soundproofing element, and at least a second soundproofing element, whereby the first soundproofing element and the second soundproofing element are arranged in neighboring proximity to each other, and whereby additional soundproofing means are provided that span an area in which the first soundproofing element and the second soundproofing element neighbor each other, as sound insulation, the additional soundproofing means possess an additional soundproofing element according to one of the previous embodiments that can be connected to and detached from the first soundproofing element and the second soundproofing element. The soundproofing wall may be configured so that the additional soundproofing element is friction-lock connected to the first soundproofing element and/or the second soundproofing element.
The invention is based on the knowledge that an excellent soundproofing effect can be achieved by using a filler medium consisting of hard material of high density, such as sand, granulate, or similar.
Accordingly, the invention is based on the idea of connecting the first and the second sheets to one another in such a way that at least two chambers are formed, and an undesired deformation of the soundproofing element is prevented when filling with a filler medium consisting of hard material.
The inventive soundproofing element therefore enables the use of filler media consisting of hard materials that have a substantially higher density and therefore a substantially higher soundproofing effect, than gaseous media. The inventive soundproofing element therefore achieves an excellent soundproofing effect.
The inventive soundproofing element has a low weight in its unfilled state, and is therefore easy to handle. It can therefore be used in various applications, such as a mobile soundproofing element for temporary sound insulation, for instance in the area of construction sites.
After the soundproofing element has been set up, it is filled with the filler medium so that the desired soundproofing effect is achieved.
After use, the filler medium can be removed from the soundproofing element so that the same advantages with regard to easy handling exist in disassembling the soundproofing element, as in the set up.
A safe connection of the first sheet with the second sheet is achieved by means of the connecting length, whereby the weight of the soundproofing element is kept low by essentially omitting rigid connection elements, such as metal. The connecting length can consist of the same material as both the first and the second sheets. However, it may also consist of a different material.
An extremely advantageous further embodiment of the previously mentioned embo

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