EP0315710A1 - Tube absorbant le son - Google Patents

Tube absorbant le son Download PDF

Info

Publication number
EP0315710A1
EP0315710A1 EP87116656A EP87116656A EP0315710A1 EP 0315710 A1 EP0315710 A1 EP 0315710A1 EP 87116656 A EP87116656 A EP 87116656A EP 87116656 A EP87116656 A EP 87116656A EP 0315710 A1 EP0315710 A1 EP 0315710A1
Authority
EP
European Patent Office
Prior art keywords
sound absorbing
pipe according
pipe
disposed
hollow
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.)
Granted
Application number
EP87116656A
Other languages
German (de)
English (en)
Other versions
EP0315710B1 (fr
Inventor
Naoyuki Furuta
Shinta Yamamura
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.)
Nitto Boseki Co Ltd
Original Assignee
Nitto Boseki Co Ltd
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 Nitto Boseki Co Ltd filed Critical Nitto Boseki Co Ltd
Priority to EP19870116656 priority Critical patent/EP0315710B1/fr
Priority to DE19873784171 priority patent/DE3784171T2/de
Publication of EP0315710A1 publication Critical patent/EP0315710A1/fr
Application granted granted Critical
Publication of EP0315710B1 publication Critical patent/EP0315710B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • E01F8/0064—Perforated plate or mesh, e.g. as wall facing
    • E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material
    • 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

Definitions

  • the present invention relates to a sound absorbing material to be attached on a fence, a side wall, a ceiling, or the like which surrounds a noise source.
  • Japanese Patent Publication No. 51-46969/1976 discloses a structure in which cylindrical bodies of glass wool are fixed on the upper edge of a sound-insulation fence.
  • Japanese 59-41400/1984 discloses a structure in which a sound absorbing board is stuck on the side edge of a sound-insulation fence (see FIG. 2).
  • the sound absorbing member according to the present invention is arranged such that a sound absorbing material is disposed in the interior of a protection pipe in a hollow of the pipe having opening portions formed in a circumferential wall of the protection pipe at regular intervals with an open area ratio of not less than 25%.
  • the sound absorbing pipe according to the present invention is arranged such that, as described above, the opening portions are formed in the circumferential wall of the protection pipe at regular intervals and the sound absorbing material is disposed interior of the protection pipe in the hollow of the pipe.
  • the opening portions of the protection pipe are provided in the entire circumference, so that there is no directivity in sound absorbing characteristics thereof and good sound absorbing performance is exhibited wherever the sound absorbing pipe is used. Therefore, based on a comparison in which the same amount of sound material is used, the sound absorbing power according to the present invention is increased to about 1.5 - 2.4 times as strong as that disclosed in Japanese Utility Model Unexamined Publication No. 59-41400/1984, the amount of increase varying depending on the frequency of sound.
  • the sound absorbing pipe can be fixedly fastened by a band means or the like, thereby facilitating the attachment of the pipe onto the upper or lower ends of a fence, onto the upper inclined surfaces at the opposite sides of a road, onto the fences, the side walls, and the ceiling of an expressway onto the noise-insulation wall of a railway, and so on.
  • a band means or the like thereby facilitating the attachment of the pipe onto the upper or lower ends of a fence, onto the upper inclined surfaces at the opposite sides of a road, onto the fences, the side walls, and the ceiling of an expressway onto the noise-insulation wall of a railway, and so on.
  • the strong sound absorbing member is provided.
  • FIGS. 3 through 5 show a first embodiment in which a sound absorbing pipe 1 is constituted by a hollow protection pipe 2, a hollow sound absorbing material 4 having a lamination structure of rock wool or the like, provided in the interior of pipe 2 in space 3, and a film 10 coating the sound absorbing material 4.
  • the protection pipe 2 is made from a strong material having superior corrosion resistance, for example, stainless steel, aluminum, FRP, or the like.
  • Pipe 2 is formed to be a hollow cylindrical body having a suitable sectional shape, and a number of opening portions 6 are equidistantly disposed in a circumferential wall 5 of the pipe 2.
  • the often area ratio of the opening portions 6 in the circumferential wall 5 is selected to be not less than 25%.
  • the upper limit of the open area ratio may be selected to be a desired value so long as the sound absorbing material 4 is not damaged or dropped off owing to contact with a foreign matter. However, the ratio is restricted to 80% for practical use.
  • the illustrated protection pipe 2 is arranged such that a stainless wire 8 having a triangular cross section is coiled on and welded to the outer circumference of a group of circumferentially equidistantly disposed stainless steel rods 7, which extend in the longitudinal direction of the pipe, to form a cylindrical netty body.
  • the structure of the protection pipe 2 is, however, not limited to the illustrated structure.
  • the dimensions of various members are selected to have values as shown in the following table.
  • the open area ratio of the opening portions 6 is calculated to be 72% using the following formula.
  • the sound absorbing material 4 formed of a hollow cylindrical body 9 of rock wool covered with a thin synthetic resin film 10 at its outer circumferential surface, is inserted into the hollow 3 of the protection pipe 2 so as internally touch the inner surface of the hollow 3.
  • the hollow portion of the cylindrical body 9 is left intact.
  • FIG. 6 shows a second embodiment in which four hollow sound absorbing materials 15, each having a glass wool hollow cylindrical body 14 with its outer circumferential surface covered with a thin synthetic resin film 13 are disposed circumferentially side by side in a hollow 12 of a protection pipe 11 having the same structure as that shown in FIG. 4.
  • Each sound absorbing pipe was constituted by a sound absorbing material having a hollow cylindrical body having a 400 mm outer diameter, a 2000 mm length, and a 40 mm thickness and is made of rock wool of 80 Kg/m3 in density.
  • Five sound absorbing pipes prepared in such a manner as described above were disposed on a floor of a reverberation room side by side at intervals of 1 m, and sound absorbing power was measured by a reverberation method.
  • the sound absorbing power of the above-mentioned sound absorbing pipes was compared with that of a conventional rock wool flat plate having a 100 mm thickness and made of rock wool of 80 Kg/m3 in density, the rock wool plate being spread over an area of 10 m2 in the reverberation room.
  • the following numerical results were obtained.
  • the results shown in the above table confirm that the sound absorbing power of the sound absorbing pipe according to the present invention is 1.5 - 2.4 times as strong as that of the sound absorbing material of the plane plate.
  • the area of execution of sound absorption by means of the sound absorbing member of the present invention is decreased to about one half that of the conventional one.
  • the open area ratio in the circumferential wall of the protection pipe is not less than 25% but within a range in which the protecting function is not lost, because the sound absorbing effect becomes extremely low if the open area ratio is less than 25%.
  • the sound absorbing material is not specifically limited in its quality, it is preferable to use rock wool or glass wool because they are light in weight and they have superior sound absorbing properties as well as superior corrosion resistance.
  • the film for covering the outer circumferential surface of the sound absorbing material it is a matter of course to select a synthetic resin film which is thin and so thin as to ameliorate the sound absorbing effect.
  • the film should be superior in water-proof qualities as well as in moisture-proof qualities.
  • the protection pipe may be formed of a plate having holes bored therein, a netty body, or the like.
  • FIG. 7 is a front view showing a third embodiment, in which sintered aluminum sound absorbing plates 17, 18, 19 and 20 are arranged to form a square-pipe in the inside of a protection pipe 16, the 16 being the same as that of the first and the second embodiments.
  • FIG. 8 shows a fourth embodiment, in which sintered aluminum sound absorbing plates 21, 22 and 23, which are the same as those shown in FIG. 7, are disposed in parallel to each other in the inside of a protection pipe 24.
  • the above-mentioned sintered aluminum sound absorbing plates may be replaced by, for example, concrete foam plates or other known sound absorbing plates.
  • FIG. 9 shows a fifth embodiment, in which a cylindrical sound absorbing material 26, similar to that shown in the first embodiment, is disposed inside a square-pipe 25 constituted by sintered aluminum sound absorbing plates of the sound absorbing pipe shown in FIG. 7.
  • FIG. 10 shows a sixth embodiment, in which a plurality of small diameter cylindrical sound absorbing materials 29 and 30 similar to those used in the second embodiment shown in FIG. 6 are disposed in the interior of the sound absorbing pipe of FIG. 8 in hollows 27 and 28 constituted by sintered aluminum sound absorbing plates 21, 22 and 23.
  • FIGS. 11 through 16 show different examples of execution of work according to the present invention.
  • FIG. 11 shows an example in which a plurality of sound absorbing pipes 33 according to the present invention are disposed on a ceiling surface 32 of a tunnel 31 in parallel to each other in the longitudinal direction of the tunnel 31.
  • FIG. 12 shows an example in which a plurality of sound absorbing pipes 37 and 38 according to the present invention are disposed in parallel to each other on the upper edge of a fence 35 and on the lower surface of a ceiling 36 of an expressway 34 having two paths, an upper path and a lower path.
  • FIG. 13 shows an example in which a series of sound absorbing pipes 41 according to the present invention are disposed on the upper edge a fence 40 on each of the opposite sides of a high-speed railroad floor 39.
  • Various kinds of communication cables may be disposed in a hollow hole 42 of the sound absorbing material constituting each of the sound absorbing pipes 41 so as to also use the sound insulation structure as a cable laying structure.
  • FIG. 14 shows an example in an expressway 44 having inclined surfaces 43 at its opposite sides, in which a number of sound absorbing pipes 45 according to the present invention are disposed side by side on the inclined surfaces 43.
  • FIG. 15 shows an example in which sound absorbing pipes 48 and 49 according to the present invention are disposed on the upper edge and the lower edge of a sound-insulating fence 47 surround a cooling tower 46 disposed on the roof of a building or the like so as to improve the noise insulation effect.
  • FIG. 16 shows an example in which sound absorbing pipes 51 according to the present invention are disposed on the upper edge of a fence 50 surrounding a press factory or the like so as to improve the noise insulation effect.
  • the present invention achieves meritorious effects with respect to following points. Being arranged such that the sound absorbing material is accommodated in the protection pipe having the opening portions formed at regular intervals with an open area ratio of not less than 25%, the sound absorbing pipe will have no directivity in sound absorbing characteristics and will have a single structure. Thus, the pipe can be used with no limitations in the positional application thereof.
  • the sound absorbing pipe is strong enough in structure for long use outdoors. Having a cylindrical shape, the sound absorbing pipe can be fixed through fastening by an attachment means such as a band on the like, which is relatively easy to execute, thereby facilitating the execution work.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Building Environments (AREA)
  • Pipe Accessories (AREA)
EP19870116656 1987-11-11 1987-11-11 Tube absorbant le son Expired - Lifetime EP0315710B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19870116656 EP0315710B1 (fr) 1987-11-11 1987-11-11 Tube absorbant le son
DE19873784171 DE3784171T2 (de) 1987-11-11 1987-11-11 Schallabsorbierendes rohr.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19870116656 EP0315710B1 (fr) 1987-11-11 1987-11-11 Tube absorbant le son

Publications (2)

Publication Number Publication Date
EP0315710A1 true EP0315710A1 (fr) 1989-05-17
EP0315710B1 EP0315710B1 (fr) 1993-02-10

Family

ID=8197438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870116656 Expired - Lifetime EP0315710B1 (fr) 1987-11-11 1987-11-11 Tube absorbant le son

Country Status (2)

Country Link
EP (1) EP0315710B1 (fr)
DE (1) DE3784171T2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0560200A2 (fr) * 1992-03-10 1993-09-15 Lino Cardin Ecran anti-bruit
EP0744496A1 (fr) * 1995-05-22 1996-11-27 TUBOSIDER ITALIANA S.p.A. Réducteur du bruit pour mur anti-bruit routier
FR2778487A1 (fr) * 1998-05-05 1999-11-12 Socarel Dispositif de reduction des nuisances sonores et ecran anti-bruit muni d'un tel dispositif
NL1018220C2 (nl) * 2001-06-06 2002-12-10 Henricus Johannes Raym Pessers Geluidsscherm voor een verkeersweg.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2226910A5 (en) * 1973-04-20 1974-11-15 Elastomeres Plastiques Motorway sound-insulating panel - several aligned screens adjacent motorway
FR2348429A1 (fr) * 1976-04-17 1977-11-10 Gruenzweig Hartmann Glasfaser Silencieux a coulisses
BE878854A (fr) * 1979-09-18 1980-01-16 Delhez Philippe Methode de realisation de barrieres acoustiques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2226910A5 (en) * 1973-04-20 1974-11-15 Elastomeres Plastiques Motorway sound-insulating panel - several aligned screens adjacent motorway
FR2348429A1 (fr) * 1976-04-17 1977-11-10 Gruenzweig Hartmann Glasfaser Silencieux a coulisses
BE878854A (fr) * 1979-09-18 1980-01-16 Delhez Philippe Methode de realisation de barrieres acoustiques

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
RUNDFUNKTECHNISCHE MITTEILUNGEN, Band 27, Nr. 2, März/April 1983, Seiten 62-70, Norderstedt, DE; H. WOLLHERR: "Gestaltung des Abhörbereiches in einem Tonübertragunswagen" *
RUNDFUNKTECHNISCHE MITTEILUNGEN, Band 29, Nr. 6, November/Dezember 1985, Seiten 278-286, Norderstedt, DE; T.J. SCHULTZ: "Acoustical uses for perforated metals" *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0560200A2 (fr) * 1992-03-10 1993-09-15 Lino Cardin Ecran anti-bruit
EP0560200A3 (en) * 1992-03-10 1993-12-01 Lino Cardin Antinoise barrier
EP0744496A1 (fr) * 1995-05-22 1996-11-27 TUBOSIDER ITALIANA S.p.A. Réducteur du bruit pour mur anti-bruit routier
FR2778487A1 (fr) * 1998-05-05 1999-11-12 Socarel Dispositif de reduction des nuisances sonores et ecran anti-bruit muni d'un tel dispositif
NL1018220C2 (nl) * 2001-06-06 2002-12-10 Henricus Johannes Raym Pessers Geluidsscherm voor een verkeersweg.
WO2002099200A1 (fr) * 2001-06-06 2002-12-12 Pessers Henricus Johannes Raym Paroi antibruit

Also Published As

Publication number Publication date
EP0315710B1 (fr) 1993-02-10
DE3784171D1 (de) 1993-03-25
DE3784171T2 (de) 1993-07-29

Similar Documents

Publication Publication Date Title
US4899846A (en) Sound absorbing pipe
US5826390A (en) Building wall membrane
US3333390A (en) Metallic stud for resilient wall construction
US2476433A (en) Hollow reinforced concrete building unit
DE2806434A1 (de) Verfahren zur schalldaempfung und schallschutzverkleidung
KR930016612A (ko) 건설용 돌출 판넬 유니트
CA1185905A (fr) Armature
JPH06129029A (ja) 共鳴型吸音・遮音パネル
DE2902831A1 (de) Schall- und waermeisolationswand
EP0315710B1 (fr) Tube absorbant le son
EP0990932B1 (fr) Réseau de cable de télécommunication dans un système de canalisation ou tube utilisé primairemement pour d' autres intentions
EP0698482A2 (fr) Matériau isolant
DE29712560U1 (de) Wärmeisoliertes Leitungsrohr
AT404643B (de) Schalldämmende abdeckhaube
GB2258480A (en) Protective membrane
FI82113C (fi) Skalkonstruktion.
DE102006060795B3 (de) Unterwasserantenne
JP2817997B2 (ja) 吸音体及び吸音構成体
EP0754901A1 (fr) Dispositifs d'atténuation de bruit, leur fabrication et leur utilisation pour l'atténuation de bruit dans les canalisations
JPH0465182B2 (fr)
GB2261001A (en) Construction board
KR102426604B1 (ko) 건축물의 프레임에 그물망 구조물이 삽입된 패시브 하우스의 하우징 구조와 그를 이용한 단열 방음 방진 내화의 복합적 시공과 그 방법
DE3021537A1 (de) Isolierung fuer den hoch- und tiefbau
JPH078941Y2 (ja) たて割り波付プラスチツク管
JP2992212B2 (ja) 地中配線用多孔管

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

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NITTO BOSEKI CO., LTD.

17P Request for examination filed

Effective date: 19890831

17Q First examination report despatched

Effective date: 19910201

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: 3784171

Country of ref document: DE

Date of ref document: 19930325

ET Fr: translation filed
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19961104

Year of fee payment: 10

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

Ref country code: FR

Payment date: 19961111

Year of fee payment: 10

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

Ref country code: DE

Payment date: 19961115

Year of fee payment: 10

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: 19971111

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

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971130

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

Effective date: 19971111

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: 19980801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST