EP0798426B1 - Akustischer Wellen-Phasenschieber und Lärmschutzwand - Google Patents

Akustischer Wellen-Phasenschieber und Lärmschutzwand Download PDF

Info

Publication number
EP0798426B1
EP0798426B1 EP96117510A EP96117510A EP0798426B1 EP 0798426 B1 EP0798426 B1 EP 0798426B1 EP 96117510 A EP96117510 A EP 96117510A EP 96117510 A EP96117510 A EP 96117510A EP 0798426 B1 EP0798426 B1 EP 0798426B1
Authority
EP
European Patent Office
Prior art keywords
sound insulating
acoustic wave
porous member
wave phase
phase varying
Prior art date
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.)
Expired - Lifetime
Application number
EP96117510A
Other languages
English (en)
French (fr)
Other versions
EP0798426A1 (de
Inventor
Koji Tsukamoto
Katsuhisa Ootsuta
Shigeya Ohhama
Sadao Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0798426A1 publication Critical patent/EP0798426A1/de
Application granted granted Critical
Publication of EP0798426B1 publication Critical patent/EP0798426B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0041—Free-standing grates
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
    • E01F8/0076—Cellular, e.g. as wall facing
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0094—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic constructions for generation of phase shifting
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/8227—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only screens ; Arrangements of sound-absorbing elements, e.g. baffles

Definitions

  • the present invention relates to an acoustic wave phase varying apparatus located around a sound source or in a propagation path for advancing or delaying the phase of an acoustic wave, and further to a sound insulating wall (sound barrier) utilizing the acoustic wave phase varying apparatus.
  • Fig. 23A is an explanatory view showing a prior sound insulating wall exemplified by JP-B- 51-46969.
  • a sound absorbing material 2 is placed along an upper end portion of a sound insulating wall 1.
  • Various types of configurations and fitting constructions are available in terms regards to the sound absorbing material 2 as shown in Figs. 23A to 23G; Fig. 23G showing a configuration as disclosed by DE-U-9311323.
  • Fig. 24A is an explanatory view of another example of a prior sound insulating wall exemplified by JP-A- 52-91514.
  • a non-transmission member 3 is installed along an upper end portion of a sound insulating wall 1.
  • the non-transmission member 3 has a structure capable of hindering the transmission of an acoustic wave.
  • various types of configurations and fitting constructions are practicable for the non-transmission member 3 as shown in Figs. 24A to 24H.
  • Fig. 25 is an explanatory view illustration for describing the operation of the sound insulating wall of Fig. 23A.
  • the sound absorbing material 2 absorbs any acoustic waves 5a emitted from a sound source 4 that strike it directly and any acoustic waves 5b that strike it after being reflected from the sound insulating wall 1. Accordingly, only acoustic waves 5c diffracting over the sound absorbing material 2 constitute acoustic waves running over the sound insulating wall to be radiated toward the outside, thus reducing the sound running over the sound insulating wall.
  • Fig. 26 is an explanatory view for describing the operation of the sound insulating wall of Fig. 24A.
  • the non-transmission member 3 reflects any acoustic waves 5d directly strike it and any acoustic waves 5e strike it after being reflected from the sound insulating wall 1.
  • the phases of these acoustic waves 5d and 5e are slightly shifted relative to the phase of acoustic waves 5c diffracted at the non-transmission member 3, due to the difference in path length therebetween. For this reason, the acoustic waves 5d, 5e and the acoustic wave 5c are weakened by interfering with each other, with the result that the sound running over the sound insulating wall is reduced.
  • the acoustic wave 5c diffracting at the sound absorbing material 2 can not be reduced.
  • no great sound reduction effect due to mutual interference can be expected from a phase shift caused only by a difference in path length resulting from the shape thereof.
  • the present invention has been achieved with a view toward solving the problems described above, and it is an object of the present invention to provide an acoustic wave phase varying apparatus and a sound insulating wall which are capable of radically shifting the phases of incident acoustic waves to enhance the sound reduction effect due to their mutual interference.
  • an acoustic wave phase varying apparatus according to claim 1.
  • Fig. 1 is a cross-sectional view showing a principal portion of a sound insulating wall including an acoustic wave phase varying apparatus according to the First Embodiment of this invention
  • Fig. 2 is an illustration for explaining the operation of the sound insulating wall of Fig. 1.
  • a sound insulating panel 11 is provided to stand at a side portion of a road over which sound sources (or noise sources) 4 such as motor vehicles pass.
  • a first sound insulating plate 12 is vertically fixed on an upper end portion of the sound insulating panel 11.
  • a plurality of second sound insulating plates 13 are horizontally fixedly attached to both side surfaces of the first sound insulating plate 12.
  • the first and second sound insulating plates 12, 13 are made from, for example, steel or plastic plate. Further, the combination of first and second sound insulating plates 12, 13 comprise a sound insulating plate assembly 14.
  • a cylindrical porous member 15 is located on the outer circumference of the sound insulating plate assembly 14.
  • the porous member 15 extends in the longitudinal directions of the sound insulating panel 11. Further, at the back of the porous member 15 there are defined independent spaces 16 with different volumes.
  • An acoustic wave phase varying apparatus 17 according to the First Embodiment is therefore composed of the porous member 15 and the sound insulating plate assembly 14 additionally serving as a reinforcement.
  • the acoustic wave phase varying apparatus 17 and the sound insulating panel 11 constitute the sound insulating wall according to the First Embodiment.
  • the porous member 15 can be made of a material such as plastic, ceramic and foamed metal.
  • plastic for manufacturing the porous member 15, the plastic particulate can be heated to be partially welded to each other.
  • Such a manufacturing method has been disclosed in, for example, JP-A- 2-289333.
  • the plastic materials that may be used are polypropylene resin, acrylate resin, vinyl chloride resin, ABS resin, polycarbonate resin and so on. According to the method of welding the plastic particulates, a porous member 15 with a desirable configuration can be easily formed using a mold.
  • acoustic waves 18 directly incident on the acoustic wave phase varying apparatus 17 and acoustic waves 19 striking the acoustic wave phase varying apparatus 17 after being reflected from the sound insulating panel 11 pass through the porous member 15 to enter the spaces 16 where they are reflected by the sound insulating plates 12, 13 making up the wall portions of the spaces 16. Subsequently, the acoustic waves pass through the porous member 15 to come out of the acoustic wave phase varying apparatus 17.
  • the phase difference ⁇ between the incident acoustic waves 18 and the reflected acoustic waves 18a varies with the normal acoustic impedance Z.
  • the normal acoustic impedance Z is controllable, thus enabling the phase difference to vary. More specifically, a desirable phase characteristic is obtainable by controlling the acoustic mass m and the acoustic resistance r with the thickness and voids of the porous member 15 and others and further by controlling the acoustic capacity c with the volume of the spaces 16. Further, if the aforesaid plastic particulates are used as the material for porous member 15 , the voids are easily controllable with the welding degree between the plastic particulates.
  • Fig. 3 is an illustration of one example of a relationship between the frequency f and the phase difference ⁇ between the incident acoustic waves 18 and the reflected acoustic waves 18a in the acoustic wave phase varying apparatus 17.
  • the fact that the phase difference ⁇ is 180 degrees or -180 degrees signifies that the incident acoustic waves 18 turn into a negative-phase condition to reflect as reflected acoustic waves 18a.
  • the reflected acoustic waves 18a take on an antiphase relation with acoustic wave 20 diffracting over the acoustic wave phase varying apparatus 17 so that both tend to cancel each other significantly attenuating the acoustic waves as a whole.
  • the acoustic wave phase varying apparatus 17 can greatly shift the phase of the incident acoustic wave, with the result that a greater sound reduction effect is obtainable through the mutual interference of the acoustic waves.
  • a plurality of independent spaces 16 having different volumes exist behind the porous member 15, it is possible to offer a plurality of phase characteristics suitable for different frequencies and hence to enhance the sound reduction effect in terms of acoustic waves in a wider frequency-range.
  • the formation into various geometries becomes easy to carry out and void control is facilitated.
  • an acrylate resin, a vinyl chloride resin, an ABS resin, a polycarbonate resin, or the like which allows the transmission of light is used for the sound insulating plate assembly 14 and the porous member 15, this will prevent the area around an installed sound insulating wall from becoming dark.
  • Fig. 4 is a cross-sectional view showing a principal portion of a sound insulating wall including an acoustic wave phase varying apparatus according to the Second Embodiment of this invention
  • Fig. 5 is an explanatory view of the operation of the Fig. 4 sound insulating wall.
  • the cross section of the acoustic wave phase varying apparatus 17 has a circular cross-section
  • an acoustic wave phase varying apparatus 21 has a substantially semi-cylindrical plate-like configuration.
  • a porous member 15 and a second sound insulating plate 13a existing at the lowermost position and exposed to the outside are joined to define an angular portion (an edge portion) 22.
  • the other arrangements are the same as the First Embodiment.
  • phase of acoustic waves 18 directly incident on the acoustic wave phase varying apparatus 21 is shifted as in the First Embodiment. Further, acoustic wave 23 passing through the angular portion after being reflected from the sound insulating panel 11 are shifted by, for example, 180 degrees in phase due to the phase varying effect caused by the configuration of the angular portion 22. Thus, phase-shifted acoustic waves 18a, 23a and acoustic waves 20 diffracting above the acoustic wave phase varying apparatus 21 tend to cancel each other to attenuate the entire acoustic wave.
  • Fig. 6 is a cross-sectional view showing a principal portion of an acoustic wave phase varying apparatus according to the Third Embodiment of this invention.
  • an acoustic wave phase varying apparatus 24 has a substantially sectorial cross section.
  • such an apparatus permits a further reduction in total size.
  • a sound reduction effect is attainable with respect to a sound source at the angular portion 22 side, just as in the Second Embodiment.
  • Fig. 7 is a cross-sectional view showing a principal portion of an acoustic wave phase varying apparatus according to the Fourth Embodiment of this invention.
  • the porous member 15 has a curved configuration
  • an acoustic wave phase varying apparatus 25 according to the Fourth Embodiment employs a flat plate-like porous member 26.
  • the porous member 26 Since the porous member 26 has a flat plate-like configuration, its manufacture and assembly are facilitated. In addition, because of the formation of an angular portion 22, a sound reduction effect is obtainable similar to the Third Embodiment.
  • Fig. 8 is a cross-sectional view showing a principal portion of an acoustic wave phase varying apparatus according to the Fifth Embodiment of this invention.
  • an acoustic wave phase varying apparatus 27 according to the Fifth Embodiment uses a plurality of separate porous members 28.
  • Angular portions 29 are formed at portions joining the respective porous member 28 and sound insulating plates 13.
  • Such an acoustic wave phase varying apparatus 27 not only shifts the phase of the acoustic waves incident on the porous members 28 but also varies the phases thereof with the angular portions 22 and 29, and therefore a great sound reduction effect is attainable.
  • porous members 28 have a flat plate-like configuration, it is also possible that, for example, they have a corrugated or wave-like cross section.
  • Fig. 9 is a cross-sectional view showing a principal portion of an acoustic wave phase varying apparatus according to the Sixth Embodiment of this invention.
  • An acoustic wave phase varying apparatus according to the Sixth Embodiment uses a flat plate-like porous member 26. It has a cross-sectional configuration nearly the inverse of that in Fig. 7.
  • An acoustic wave phase varying apparatus 30 with such a configuration can also provide a sound reduction effect substantially similar to that of the Third Embodiment.
  • Figs. 10 and 11 are cross-sectional views showing principal portions of acoustic wave phase varying apparatuses according to the Seventh Embodiment of this invention.
  • a sound insulating plate assembly 31 comprises first and second sound insulating plates 12, 13, a third sound insulating plate 32 with a circular arc cross section, and two fourth sound insulating plates 33 disposed to extend radially from the third sound insulating plate 32.
  • An acoustic wave phase varying apparatus 34 is composed of the sound insulating plate assembly 31 and a porous member 35 with a circular arc cross section.
  • the plate-like porous member 35 is made of a material that is the same as those in the above-mentioned embodiments, its thickness varies. In the porous member 35 of Fig. 10, its thickness varies to become larger toward one end portion, while in the porous member 35 of Fig. 11 its thickness varies to become larger toward the other end portion.
  • the porous member 35 of the acoustic wave phase varying apparatus 34 has, as acoustic characteristics, an acoustic mass m and an acoustic resistance r, and a space 16 retains an acoustic capacity c.
  • the variation in thickness of the porous member 35 can be used to adjust the acoustic mass m and the acoustic resistance r, thus providing a desired phase characteristic.
  • Figs. 12 and 13 are cross-sectional views showing principal portions of acoustic wave phase varying apparatus according to the Eighth Embodiment of this invention.
  • porous members 15 each having an even thickness are piled up to change the entire thickness.
  • Fig. 13 illustrates a piling example different from that of Fig. 12.
  • Fig. 14 is a cross-sectional view showing principal portion of an acoustic wave phase varying apparatus according to the Ninth Embodiment of this invention.
  • an acoustic wave phase varying apparatus 37 employs, in place of the flat plate-like porous member 28 in Fig. 8, porous members 38, 39 having a curved cross section.
  • the porous members 38, 39 are made to have a curved cross section, their essential surface area, i.e., the acoustic wave reception area, becomes larger than the projected area. Accordingly, the apparent acoustic mass m and acoustic resistance r become smaller so that the phase difference characteristic becomes closer to 180 degrees. Accordingly, further excellent sound reduction effects can be attained.
  • the cross-sectional configuration of the porous member is not limited to that of Fig. 14, and it is also possible to use a porous member 40 with a cross-sectional configuration, for example, as shown in Fig. 15. Even in this case, the same effect is obtainable as long as the surface area exceeds the projected area.
  • Fig. 16 is a cross-sectional view showing a principal portion of an acoustic wave phase varying apparatus according to the Eleventh Embodiment of this invention.
  • an acoustic wave phase varying apparatus 41 according to this embodiment, sound insulating plates constituting bottom portions of spaces 16, i.e., second sound insulating plates 13, are respectively inclined with respect to the horizontal, and their lower end portions are connected to a porous member 15.
  • the other arrangements are the same as those in the Third Embodiment.
  • the acoustic wave phase varying apparatus 41 In the acoustic wave phase varying apparatus 41, water coming in the spaces 16 after passing through the porous member 15 flows along the second sound insulating plates 13 and then comes out through the porous member 15 in the vicinity of an angular portion 22. Thus, in cases where the acoustic wave phase varying apparatus 41 is applied to a sound insulating wall and installed outdoors, countermeasures against rain water become easy to adapt. Further, the sound reduction effect is the same as that of the Third Embodiment.
  • Fig. 17 is a cross-sectional view showing a principal portion of an acoustic wave phase varying apparatus according to the Twelfth Embodiment of this invention.
  • a lighting device 43 such as a fluorescent lamp is provided within a sound insulating plate assembly 31.
  • a porous member 15 and the sound insulating plate assembly 31 are made of a transparent or translucent material such as acrylate resin, vinyl chloride resin, ABS resin, polycarbonate resin and so on.
  • the sound insulating wall may also double as lighting equipment.
  • the sound reduction effect is virtually the same as that of the Third Embodiment.
  • Fig. 18 is a plan view showing an arrangement of an acoustic wave phase varying apparatus according to the Thirteenth Embodiment of this invention, where the cross-sectional configuration is the same as the Fig. 4 configuration.
  • an acoustic wave phase varying apparatus 21 according to this embodiment its entire cross-sectional dimension varies in its longitudinal direction so that the acoustic wave reception surface is enlarged.
  • the virtual surface area is greater than the projected area, the apparent acoustic mass m and acoustic resistance r are reducible, with the result that the phase difference characteristic becomes closer to 180 degrees so that a more excellent sound reduction effect can be attained.
  • the plane shapes of both side portions of the acoustic wave phase varying apparatus 21 assume a saw tooth like configuration, the configuration is not limited thereto, and it is also possible to take a wavelike configuration as shown in Fig. 19. Further, in the acoustic wave phase varying apparatus 24 with the cross-sectional configuration as shown in Fig. 6, the plane shape of one side portion can be formed as shown in Fig. 20.
  • Fig. 21 is a perspective view schematically showing an acoustic wave phase varying apparatus according to the Fourteenth Embodiment of this invention.
  • an acoustic wave phase varying apparatus constructed separately is attached onto a sound insulating panel, in this embodiment a sound insulating panel 11 section and an acoustic wave phase varying apparatus 24 section are integrally manufactured in advance.
  • a sound insulating panel 11 section and an acoustic wave phase varying apparatus 24 section are integrally manufactured in advance.
  • Fig. 22 is a perspective view schematically showing another example of the Fig. 21 apparatus.
  • both longitudinal end portions 11a of a sound insulating panel 11 are more extended than the acoustic wave phase varying apparatus 24 section.
  • the resultant sound insulating wall results in easy installation in such a manner that columns (not shown) with an H-shaped cross section are planted at given intervals and both the end portions 11a of the sound insulating panel 11 are fitted into the channels of the H-shaped cross section type columns.
  • the acoustic wave phase varying apparatus section may be changed as illustrated in the above-described embodiments.
  • the acoustic wave phase varying apparatus is used for a sound insulating wall, the acoustic wave phase varying apparatus may also be placed on other structures such as buildings, without a sound insulating panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Claims (10)

  1. Element zum Verändern der Phase von akustischen Wellen, das folgendes aufweist:
    eine schalldämmende Plattenanordnung (14), die eine Vielzahl von schalldämmenden Platten (12, 13) aufweist, dadurch gekennzeichnet,
    daß die schalldämmenden Platten eine Vielzahl von unabhängigen Räumen (16) mit unterschiedlichem Volumen bilden,
    wobei die schalldämmende Plattenanordnung (14) so ausgebildet ist, daß sie ein poröses Element (15) trägt, das aus porösem Material besteht und das an dem Außenumfang der schalldämmenden Plattenanordnung (14) angeordnet ist.
  2. Element nach Anspruch 1,
    wobei das poröse Material des porösen Elements (15) durch teilweises Verschmelzen einer großen Anzahl von Kunststoffteilchen miteinander hergestellt ist.
  3. Element nach Anspruch 1 oder 2,
    wobei das poröse Element (15) und eine (13a) der schalldämmenden Platten, die nach außen freiliegt, miteinander verbunden sind, um einen winkelförmigen Bereich (22) zu bilden.
  4. Element nach einem der Ansprüche 1 bis 3,
    wobei das poröse Element (15, 35) eine plattenartige Konfiguration mit veränderlicher Dicke hat.
  5. Element nach einem der Ansprüche 1 bis 4,
    wobei die Dicke des porösen Elements (15, 35) durch Ändern ihrer Anzahl von Laminatschichten geändert wird.
  6. Element nach einem der Ansprüche 1 bis 3,
    wobei das poröse Element (38, 39) einen gekrümmten Querschnitt hat.
  7. Element nach einem der Ansprüche 1 bis 6,
    wobei sich der Querschnitt des Elements dimensionsmäßig in seiner Längsdimension ändert, so daß seine Empfangsoberfläche für akustische Wellen vergrößert wird.
  8. Element nach einem der Ansprüche 1 bis 7,
    wobei die unterste schalldämmende Platte (13) in bezug auf eine Horizontalrichtung geneigt ist und der untere Endbereich davon mit dem porösen Element (15) verbunden ist.
  9. Element nach einem der Ansprüche 1 bis 8,
    wobei das poröse Element (15) und die schalldämmende Plattenanordnung (14) aus einem Material bestehen, das einen Lichtdurchlaß ermöglicht.
  10. Schalldämmende Wand, die folgendes aufweist:
    eine schalldämmende Wand (11), die so vorgesehen ist, daß sie in der Nähe einer Schallquelle steht;
    wobei ein Element zum Ändern der Phase von akustischen Welle nach einem der Ansprüche 1 bis 9 entlang einem oberen Endbereich der schalldämmenden Wand (11) angebracht ist.
EP96117510A 1996-03-28 1996-10-31 Akustischer Wellen-Phasenschieber und Lärmschutzwand Expired - Lifetime EP0798426B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP74442/96 1996-03-28
JP8074442A JP2859578B2 (ja) 1996-03-28 1996-03-28 音波位相変化装置及び防音壁
JP7444296 1996-03-28

Publications (2)

Publication Number Publication Date
EP0798426A1 EP0798426A1 (de) 1997-10-01
EP0798426B1 true EP0798426B1 (de) 2000-04-19

Family

ID=13547362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117510A Expired - Lifetime EP0798426B1 (de) 1996-03-28 1996-10-31 Akustischer Wellen-Phasenschieber und Lärmschutzwand

Country Status (8)

Country Link
EP (1) EP0798426B1 (de)
JP (1) JP2859578B2 (de)
KR (1) KR100240212B1 (de)
CN (1) CN1125219C (de)
DE (1) DE69607826T2 (de)
MY (1) MY124453A (de)
SG (1) SG47192A1 (de)
TW (1) TW305006B (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774107B1 (fr) * 1998-01-28 2000-04-28 Pic Conseil Parement amortisseur acoustique pour mur anti-bruit
FR2778487A1 (fr) * 1998-05-05 1999-11-12 Socarel Dispositif de reduction des nuisances sonores et ecran anti-bruit muni d'un tel dispositif
AT408552B (de) * 1998-05-12 2002-01-25 Brunbauer Wolfgang Dipl Ing Schallschutzeinrichtung
DE60038746T2 (de) * 2000-11-08 2009-05-14 Suzuki, Masao, Koganei Gerollte schalldichte wand
KR20040021708A (ko) * 2002-08-29 2004-03-11 유니프레스 가부시키가이샤 방음장치
NL1028876C2 (nl) * 2005-04-26 2006-10-27 Univ Delft Tech Geluidsscherm.
DE102008036581A1 (de) 2008-08-06 2010-02-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Lärmschutzwand und Verfahren zu deren Herstellung
DE102010009987A1 (de) * 2010-03-02 2011-09-08 Bettina Köhne Schallschutzschirm
JP5380610B2 (ja) * 2011-01-24 2014-01-08 学校法人 関西大学 吸音体を用いた遮音壁
CN105603894B (zh) * 2014-11-10 2018-06-26 苏交科集团股份有限公司 一种声屏障顶端消声结构
WO2018038043A1 (ja) * 2016-08-26 2018-03-01 富士フイルム株式会社 防音構造体

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146969B2 (de) 1973-07-10 1976-12-11
JPS5291514A (en) 1976-01-27 1977-08-02 Kiyouji Fujiwara Sound insulation wall
EP0578272B1 (de) * 1988-10-31 1997-02-26 Mitsubishi Denki Kabushiki Kaisha Poröse Struktur
GB2269842A (en) * 1992-08-21 1994-02-23 Univ Southampton Sound absorbing apparatus
JP2652752B2 (ja) * 1993-02-09 1997-09-10 日東紡績株式会社 遮音壁用吸音装置および遮音壁
DE19509678C2 (de) * 1995-03-07 2003-08-21 Deutsche Bahn Ag Schallschutzwand

Also Published As

Publication number Publication date
JP2859578B2 (ja) 1999-02-17
JPH09265291A (ja) 1997-10-07
KR970065965A (ko) 1997-10-13
MY124453A (en) 2006-06-30
DE69607826T2 (de) 2000-12-21
TW305006B (en) 1997-05-11
SG47192A1 (en) 1998-03-20
KR100240212B1 (ko) 2000-01-15
EP0798426A1 (de) 1997-10-01
DE69607826D1 (de) 2000-05-25
CN1125219C (zh) 2003-10-22
CN1160810A (zh) 1997-10-01

Similar Documents

Publication Publication Date Title
EP0798426B1 (de) Akustischer Wellen-Phasenschieber und Lärmschutzwand
EP0722529B1 (de) Akustikpaneelsystem
JP2815542B2 (ja) 多孔質構造体を用いた吸音機構
JP2004062074A (ja) 吸音装置
US8006802B2 (en) Acoustic structure and acoustic room
US8631901B2 (en) Acoustic structure
JP4811822B2 (ja) 吸音ブロック及び吸音ブロックの施工方法
US7613307B2 (en) Active sound reduction apparatus and active noise insulation wall having same
IL227116A (en) Noise protection component
JP2004170665A (ja) 吸遮音構造
JP3529303B2 (ja) 防音壁
JP5350183B2 (ja) 二重壁構造を有する金属製遮音パネル
JP3343309B2 (ja) 音響パネルシステム
JP2005017636A (ja) 吸音構造体
JPH1054096A (ja) 吸音材及び吸音パネル
JP2835014B2 (ja) 防音ユニット
AU717039B2 (en) Acoustical panel system
JP2001032222A (ja) 掘割道路等の通気型遮音壁構造
CA2173503C (en) Acoustical panel system
JP2000265422A (ja) 防音装置
JP2004168173A (ja) 吸音構造及び吸遮音構造体
KR20040056370A (ko) 양면 흡음형 방음판넬
JPH10247086A (ja) 車両の防音装置
FR2835007A1 (fr) Panneau pour cloison d'isolation acoustique; cloison d'isolation acoustique constituee de tels panneaux

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19970912

17Q First examination report despatched

Effective date: 19981126

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69607826

Country of ref document: DE

Date of ref document: 20000525

ET Fr: translation filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 727

REG Reference to a national code

Ref country code: GB

Ref legal event code: 727A

REG Reference to a national code

Ref country code: GB

Ref legal event code: 727B

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20041008

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20041027

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20041028

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060503

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20051031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060630