EP3440965A1 - Schalldämmender verbundvorhang - Google Patents

Schalldämmender verbundvorhang Download PDF

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Publication number
EP3440965A1
EP3440965A1 EP18186789.6A EP18186789A EP3440965A1 EP 3440965 A1 EP3440965 A1 EP 3440965A1 EP 18186789 A EP18186789 A EP 18186789A EP 3440965 A1 EP3440965 A1 EP 3440965A1
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EP
European Patent Office
Prior art keywords
curtain
layer
frequency
reflective layer
sound waves
Prior art date
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Granted
Application number
EP18186789.6A
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English (en)
French (fr)
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EP3440965B1 (de
Inventor
Jean-Philippe Lemoine
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H23/00—Curtains; Draperies
    • A47H23/02—Shapes of curtains; Selection of particular materials for curtains
    • A47H23/08—Selection of particular materials
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Definitions

  • the invention is in the field of composite noise devices, such devices comprising a plurality of layers assembled together and in particular to isolate a room acoustically.
  • the invention relates more particularly to a flexible composite noise curtain and adapted to be suspended in front of an opening that can be closed by a door or window, or to separate two spaces, or to be suspended in front of a wall or window.
  • Such flexible composite noise curtains in particular acoustic curtains, are known which comprise a plurality of textile layers assembled to one another generally with the aid of one or more seams.
  • Each textile layer of this curtain is composed of a very dense and very thick material, for example heavy cotton fleece of a mass per unit area, or basis weight, greater than 300 g / m 2 .
  • the acoustic curtain in order to present a satisfactory Rw weighted attenuation index, that is to say at least equal to 7 decibels, the acoustic curtain must comprise a large number of layers in order to produce a mass effect that weakens the sound waves passing through. the curtain.
  • the acoustic curtain has much too heavy grammage.
  • this acoustic curtain very often requires for its installation expensive rail systems and difficult to implement.
  • the invention thus relates to a composite noise curtain having a Rw weighted loss index greater than 7 decibels which is not solely conditioned by the weight of the curtain.
  • the invention also provides a composite noise curtain for which the weight has been reduced without reducing its sound insulation qualities.
  • acoustic curtain or "acoustic curtain”
  • acoustic curtain it is the succession of heavy layers assembled together that absorbs part of the sound waves by the mass effect of the layers composing the curtain.
  • the material forming each layer of such a "sound or acoustic” curtain is a fleece fabric of natural or synthetic fibers, said layer having a basis weight greater than 300 g / m 2 .
  • the inventor has developed a composite noise curtain 1a-1c whose soundproofing properties do not rely solely on the mass effect of the curtain 1a - 1c, which allows and especially advantageously considerably reduce the weight of the latter without compromise the weighted sound reduction index Rw.
  • the noise curtain 1a-1c of the invention comprises a series of layers, assembled together for example by seams 10, 11, 13 ( Figures 5a and 5b ) as will be specified later, and whose acoustic properties are different and complementary.
  • the sound waves evoked in the present description, and propagating in any material medium are characterized by frequencies audible to the human ear, that is, that is frequencies between 20 hertz and 20,000 hertz.
  • frequencies audible to the human ear that is, that is frequencies between 20 hertz and 20,000 hertz.
  • sound waves whose frequency is less than 300 Hz of low frequency sound waves will be qualified, while sound waves whose frequency is at least 300 Hz will be described as high frequency sound waves. .
  • the first absorption layer 2a is formed in a heavy material, whose grammage is greater than 300 g / m 2 , ideally between 350 g / m 2 and 500 g / m 2 .
  • the heavy material is a soft fleece textile, for example brushed cotton.
  • the first absorption layer 2a has a thickness of between 1 and 2 millimeters, preferably of the order of 1 millimeter.
  • the first absorption layer 2a absorbs part of the energy emitted by the sound waves propagating towards said layer 2a, which makes it possible to reduce the amplitude of the sound waves passing through this first absorption layer 2a. and this, whatever their frequency.
  • the damping layer 3 is contiguous with the first absorption layer 2a and comprises gas, preferably an inert gas such as air.
  • This damping layer 3 is formed of a soft and light textile material whose weight is between 100 g / m 2 and 150 g / m 2 , and is preferably the order of 120 g / m 2 .
  • this material is particularly porous, so that the gas is uniformly distributed in the damping layer 3.
  • Said damping layer 3 has a thickness of between ten and fifteen millimeters, preferably of the order of twelve millimeters.
  • the material used to make the cushioning layer 3 is mineral wool or wadding, for example cotton wool.
  • the gas contained in the wadding forming the damping layer 3 acts as a spring on the sound waves propagating in this layer 3. This results in a damping of the sound waves whatever their frequency, thus decreasing the amplitude of the sound waves through the damping layer 3. It is understood that it is the gas contained in the material of the damping layer 3 which damps the sound waves. Such a layer 3 formed solely of gas would thus have the same damping qualities of the sound waves. It is therefore not the mass of this layer 3 that conditions its damping qualities.
  • the first absorption layer 2a and the damping layer 3 are contiguous, they both contribute to reducing the amplitude of the sound waves passing through them successively, whatever the frequency of the sound waves.
  • the first low frequency reflective layer 4a is formed of a material adapted to reflect low frequency sound waves, that is to say whose frequency is less than 300 Hz. In other words, the majority of sound waves having passed through this first reflective layer 4a has a frequency of at least 300 Hz.
  • the material forming this layer 4a is a flexible textile, generally a woven fabric such as satin or a tight-knit fabric such as velvet. This fabric, whether it is woven or with tight mesh, may be in natural or synthetic fibers, and is preferably in polyester. It also has the advantage of being opacifying. It is the material forming the low frequency reflective layer 4a which provides the latter with its reflection qualities of sound waves whose frequency is less than 300 Hz.
  • the first high frequency reflective layer 5a is formed of a material adapted to reflect the high frequency sound waves, that is to say whose frequency is at least 300 Hz. In other words, the majority of sound waves having passed through this first reflective layer 5a has a frequency of less than 300 hertz.
  • the material forming this layer 5a is a flexible and waterproof fabric of synthetic fibers, such as polyester or polyvinyl chloride. The sealing properties of the first high frequency layer 5a thus allow it to reflect the high frequency waves. It is the material forming the high frequency reflective layer 5a which provides the latter with its reflection qualities of sound waves whose frequency is at least equal to 300 Hz.
  • the noise curtain 1a-1c therefore comprises two first reflective layers, respectively low frequency 4a and high frequency 5a, which gives the advantage of improving the attenuation of the sound passing through the curtain 1a-1c with respect to a curtain which comprises a layer 2a absorption, a damping layer 3 and a single reflective layer of sound waves whose frequencies are representative of the entire audible sound spectrum, that is to say from 20 Hz to 20000 Hz.
  • the residual sound waves having passed through the curtain 1a-1c are weakened, the noise curtain 1a-1c typically having a Rw-weighted attenuation index of at least 8 decibels.
  • the noise curtain 1a of the invention in the first embodiment comprises four layers successively assembled together in the following order: first high frequency reflective layer 5a, first absorption layer 2a, damping layer 3, and first low frequency reflective layer 4a.
  • the first absorption layer 2a is formed of two-sided brushed cotton, and has a thickness of about 1 millimeter and a basis weight of between 350 g / m 2 and 500 g / m 2 , as described above. above.
  • the damping layer 3 is formed of cotton wool and has a thickness of about 12 millimeters and a basis weight of about 120 g / m 2, as described above.
  • the first high frequency reflective layer 5a is formed of a polyester fabric impregnated with a polyvinyl chloride coating and has a thickness of about 0.3 millimeters and a basis weight of about 135 g / m 2 , as described herein. -above.
  • PES coated we will use in the following description the term PES coated to define this fabric.
  • the first low frequency reflective layer 4a is formed of opacifying polyester satin and has a thickness of about 1 millimeter and a basis weight of about 260 g / m 2 , as described above.
  • the sound waves striking the curtain 1a are first filtered by the first high frequency reflective layer 5a so that a significant portion of the sound waves of frequency greater than or equal to 300 Hz are reflected.
  • the sound waves transmitted in the curtain 1a are then weakened in amplitude by the first absorption layer 2a and then by the damping layer 3.
  • a significant portion of the residual sound waves whose frequency is less than 300 Hz are reflected in the curtain 1a against the first low frequency reflective layer 4a.
  • the curtain 1a thus has a basis weight of 0.875 g / m 2 and a weight loss factor Rw of 8 decibels.
  • This curtain 1a thus constitutes a solution providing a satisfactory sound insulation for a much lower weight than the acoustic curtains known.
  • this first embodiment of the noise curtain is the lightest of all.
  • the assembly of the layers of the curtain 1a is made at the upper edges 8 and 9 side of the curtain 1a.
  • the upper edge 8 will be called the edge of the curtain 1a intended to be hooked, and the lower edge of the curtain intended to be flush with the floor, or even in contact with the floor of the room.
  • the satin layer 4a being longer than the other layers of the curtain 1a, it is folded over the coated PES layer 5a at the upper edge 8 to form a second hem enclosing the first absorption layer 2a and the outer layer.
  • a ruflette 12 is disposed transversely on the coated PES layer 5a, in the vicinity of the upper edge 8 of the curtain 1a to form a fastening means of said curtain 1a to the wall.
  • the four layers 2a, 3, 4a, 5a and the ruflette 12 are then assembled by second transversal seams 11a and 11b, the seam 11a being located at a distance of about 7 to 10 centimeters from the upper edge 8.
  • At least one Velcro strip 14 is disposed against the coated PES fabric layer 5a and joined to the curtain by means of the longitudinal seam 13.
  • These velcro strips 14 are adapted to interact with complementary strips secured to the wall, and allow press the curtain 1a against the wall to further improve the sound insulation. It is understood that any known means of bonding the side edges 9 of the curtain 1a to the wall can be used.
  • the noise curtain 1b of the invention in the second embodiment comprises five layers successively assembled together in the following order: first high frequency reflective layer 5a, first absorption layer 2a, damping layer 3, second absorption layer 2b and first low frequency reflective layer 4a.
  • the first and second absorption layers 2a, 2b are formed of fleece cotton scraped on both sides and each have a thickness of about 1 millimeter and a basis weight of between 350 g / m 2 and 500 g / m 2 , in accordance with the description above.
  • damping layer 3 and the first reflective layers respectively low and high frequency 4a, 5a are as described above with reference to the figure 1 .
  • the succession in this order of the first absorption layer 2a, the damping layer 3 and the second absorption layer 2b form a mass-spring-mass assembly which provides absorption capacities and damping sound waves greater than those provided by a set consisting simply of a succession of heavy layers.
  • the assembly of the layers of the curtain 1b is made in the same way as for the curtain 1a. However, it is specified that the two layers respectively of satin 4a and coated PES 5a are folded inside the curtain 1b between the first absorption layer 2a and the damping layer 3.
  • the sound waves striking the curtain 1b are first filtered by the first high frequency reflective layer 5a so that a significant portion of the sound waves with a frequency greater than or equal to 300 Hz are reflected.
  • the sound waves transmitted in the curtain 1a are then weakened in amplitude by the mass-spring-mass assembly formed by the first absorption layer 2a, the damping layer 3 and the second damping layer 2b.
  • a significant portion of the residual sound waves whose frequency is less than 300 Hz are reflected in the curtain 1a against the first low frequency reflective layer 4a.
  • the curtain 1b thus has a basis weight of 1.235 g / m 2 and a weight loss factor Rw of 12 decibels.
  • This curtain 1b is thus a solution providing a satisfactory sound insulation for a weight less than the acoustic curtains known.
  • Rw weight loss factor
  • the noise curtain 1c of the invention in the third embodiment comprises two layers 4b, 5b more than the curtain 1b according to the second embodiment.
  • These two additional layers are second reflective layers respectively low frequency 4b and high frequency 5b, identical to the first reflective layers respectively low frequency 4a and high frequency 5a.
  • second low frequency reflective layer 4b first high frequency reflective layer 5a, first absorption layer 2a, layer damping element 3, second absorption layer 2b, second high-frequency reflective layer 5b and first low-frequency reflective layer 4a.
  • the first and second absorption layers 2a, 2b and the damping layer 3 forming the mass-spring-mass assembly of the curtain 1c are as described above with reference to FIG. figure 2 .
  • the first and second low frequency reflective layers 4a, 4b, as well as the first and second high frequency reflective layers 5a, 5b are also as described above with reference to FIG. figure 2 .
  • the assembly of the layers of the curtain 1c is made in the same way as for the curtain 1a and the curtain 1b.
  • the two satin layers 4a and 4b are folded inside the curtain 1b at the side edges 9 between the first absorption layer 2a and the damping layer 3.
  • one of the two satin layers 4a or 4b are folded over the other satin layer 4a or 4b to form the hem at the upper edge 8.
  • the sound waves striking the curtain 1c are first filtered by the second low-frequency reflective layer 4b so that a significant portion of the sound waves of frequency less than 300 Hz are reflected, then a significant portion of the sound waves transmitted in this layer 5a and whose frequency is greater than or equal to 300 Hz are reflected on the first high frequency layer 5a.
  • the residual sound waves transmitted in the curtain 1c are then weakened in amplitude by the mass-spring-mass assembly formed by the first absorption layer 2a, the damping layer 3 and the second damping layer 2b.
  • a significant portion of the residual sound waves having passed through the mass-spring-mass assembly and whose frequency is greater than or equal to 300 Hz are reflected in the curtain 1c against the second high frequency layer 5b.
  • a significant portion of the sound waves having passed through this layer 5b and whose frequency is less than 300 Hz are reflected in the curtain 1c against the first low frequency layer 4a.
  • the curtain 1c thus has a basis weight of 1.63 g / m 2 and a weight loss factor Rw of 12 decibels. This curtain 1c thus constitutes a solution providing a satisfactory sound insulation for a weight lower than the acoustic curtains known.
  • the curve 15 represents the sound level of the waves that have not yet passed through the curtain 1c as a function of their emission frequency
  • the curve 16 represents the sound reduction index R of the curtain 1c as a function of the frequency of the emission of sound waves. It is well known that the sound reduction index R of the curtain 1c (and in general of any material) depends on the emission frequency of the sound waves, the attenuation index R being even greater than the emission frequency of the sound waves is high.
  • the weighted attenuation index Rw is calculated according to ISO 16283-1, this Rw-weighted index being independent of the frequency of the sound waves. As stated in the above description, the weighted Rw attenuation index of the curtain 1c is 12 decibels.
  • the tests clearly demonstrate the need to incorporate the first reflective layers respectively low frequency 4a and high frequency 5a.
  • the test I on a curtain which does not include a reflective layer, and the tests II and III on curtains which each comprise two reflective layers of the same nature (low frequency for the curtain II, high frequency for the curtain III) are not able to filter the entire spectrum of audible frequencies, which ultimately leads to poor Rw weighted impairment indices.
  • the IV test also clearly demonstrates the necessity of incorporating into the associated curtain a damping layer 3 contiguous with the first absorption layer 2a, the combination of these two layers 2a and 3 substantially improving the attenuation of the sound waves passing through. the curtain.
  • a comparison of the tests VII and VIII demonstrates that the addition of a second absorption layer 2b of the fleece to the curtain 1a, 1b improves the Rw-weighted attenuation index of said curtain 1b tested in VIII.
  • the reason is that the succession of the first absorption layer 2a, the damping layer 3 and the second absorption layer 2b in this order forms the mass-spring-mass assembly which provides absorption capacities. and damping sound waves higher than those provided by a set consisting simply of a succession of heavy layers.
  • the coated PES is more effective than the PVC, because the PES fabric coated with a polyvinyl chloride coating is more impervious than the PVC fabric. This better impermeability is due to a better toughness of the coated PES, that is to say a greater elasticity of weaving. As a result, the coated PES reflects better the high frequency sound waves.
  • the noise curtain 1a - 1c of the invention thus provides a practical and effective sound insulation solution. Indeed, thanks to the complementary acoustic properties of the layers that compose it, the weakening of the sound waves passing through the curtain 1a-1c does not rely solely on the mass effect, but on the reflection of the sound waves due to the nature of the materials. forming the reflective layers considered 4a, 4b, 5a, 5b and on the mass-spring-mass effect which provide a weighted attenuation ratio Rw of greater than or equal to 8 dB, and even greater than 10 dB for the curtains 1b and 1c .
  • the noise curtain 1a-1c has interesting thermal insulation properties, which is another advantage of the invention.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
EP18186789.6A 2017-08-02 2018-08-01 Schalldämmender verbundvorhang Active EP3440965B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18186789T PL3440965T3 (pl) 2017-08-02 2018-08-01 Kompozytowa kurtyna dźwiękochłonna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1757403A FR3069767B1 (fr) 2017-08-02 2017-08-02 Rideau antibruit composite

Publications (2)

Publication Number Publication Date
EP3440965A1 true EP3440965A1 (de) 2019-02-13
EP3440965B1 EP3440965B1 (de) 2020-12-16

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EP18186789.6A Active EP3440965B1 (de) 2017-08-02 2018-08-01 Schalldämmender verbundvorhang

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EP (1) EP3440965B1 (de)
FR (1) FR3069767B1 (de)
PL (1) PL3440965T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114293898B (zh) * 2021-12-30 2023-12-08 厦门冠音泰科技有限公司 一种可卷曲收拢的消声降噪窗帘及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487256A1 (fr) * 1980-07-24 1982-01-29 Applic Rech En Ste Panneau souple pour rideaux isolants
FR2726886A1 (fr) * 1994-11-15 1996-05-15 Riedel Paul Isolant thermique, phonique, decoratif
EP2623681A1 (de) * 2012-02-02 2013-08-07 Brunswick Et Fils Schallschutz
US20150034415A1 (en) * 2012-04-17 2015-02-05 Aural Sonic, Inc. Sound Insulating Curtain
WO2017005948A1 (es) * 2015-07-03 2017-01-12 Universitat Politècnica De Valencia Cortina de barrera frente a la luz, al ruido, al calor, al fuego y a las radiaciones electromagnéticas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487256A1 (fr) * 1980-07-24 1982-01-29 Applic Rech En Ste Panneau souple pour rideaux isolants
FR2726886A1 (fr) * 1994-11-15 1996-05-15 Riedel Paul Isolant thermique, phonique, decoratif
EP2623681A1 (de) * 2012-02-02 2013-08-07 Brunswick Et Fils Schallschutz
US20150034415A1 (en) * 2012-04-17 2015-02-05 Aural Sonic, Inc. Sound Insulating Curtain
WO2017005948A1 (es) * 2015-07-03 2017-01-12 Universitat Politècnica De Valencia Cortina de barrera frente a la luz, al ruido, al calor, al fuego y a las radiaciones electromagnéticas

Also Published As

Publication number Publication date
PL3440965T3 (pl) 2021-06-28
EP3440965B1 (de) 2020-12-16
FR3069767A1 (fr) 2019-02-08
FR3069767B1 (fr) 2019-08-16

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