EP0445431A2 - Ecran à résonateur pour un écran amortisseur de son - Google Patents

Ecran à résonateur pour un écran amortisseur de son Download PDF

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Publication number
EP0445431A2
EP0445431A2 EP90125461A EP90125461A EP0445431A2 EP 0445431 A2 EP0445431 A2 EP 0445431A2 EP 90125461 A EP90125461 A EP 90125461A EP 90125461 A EP90125461 A EP 90125461A EP 0445431 A2 EP0445431 A2 EP 0445431A2
Authority
EP
European Patent Office
Prior art keywords
resonator
cover
backdrop
filling
bulges
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.)
Withdrawn
Application number
EP90125461A
Other languages
German (de)
English (en)
Other versions
EP0445431A3 (en
Inventor
Gerd De Lank
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.)
G&H Montage GmbH
Original Assignee
G&H Montage GmbH
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 G&H Montage GmbH filed Critical G&H Montage GmbH
Publication of EP0445431A2 publication Critical patent/EP0445431A2/fr
Publication of EP0445431A3 publication Critical patent/EP0445431A3/de
Withdrawn legal-status Critical Current

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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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Definitions

  • the invention relates to a resonator backdrop for backdrop silencers, with a support housing or frame in which a filling made of an absorber material is arranged, and at least one surface facing a flow channel is provided with a perforated cover which is spaced apart by spacing elements from the filling made of absorber material is held.
  • Such scenes for backdrop silencers based on hole resonators or Helmholz resonators are known.
  • a system capable of oscillation is formed by the scenes, in which the air present in the vicinity of the perforations acts as a mass and the air layer in the resonator cavity acts as a spring.
  • the resonance i.e. H. at the greatest speed of the air particles moving through the holes, sound energy is extracted from the space in front of the resonator backdrop.
  • the solution to this problem according to the invention is characterized in that the spacer elements are formed by bulges of the cover protruding in the direction of the filling.
  • the bulges are formed by depressions made in the cover, in particular by deep drawing.
  • the reference numeral 1 denotes a carrier box of a resonator backdrop, in which a substantially plate-shaped filling 5 made of an absorber material, such as. B. mineral wool, cotton wool or plastic fibers is arranged.
  • the carrier box which preferably consists of a metal or plastic, is provided with a cover 2, in which round holes 3 are provided in the present exemplary embodiment arranged in a square grid. A random arrangement of the holes is also possible.
  • cover 2 With 4 in each case between the rows of holes in the present embodiment, parallel to each other in one direction, introduced in the cover 2 beads. The beads form bulges in the cover, which protrude in the direction of the filling 5 and come into contact with the filling at the points labeled 6.
  • the cover 2 consists of sheet steel, and the beads 4 are introduced into the steel sheet by deep drawing.
  • a grid of beads, preferably perpendicularly, crossing beads could also be provided and the holes 3 could have different hole shapes than in the exemplary embodiment shown.
  • the arrangement of the holes differ from that of the exemplary embodiment shown in FIG. 1 for a resonator backdrop.
  • the holes it is not absolutely necessary, as in the exemplary embodiment according to FIGS. 1 and 2, for the holes to be arranged at grid spacings which are the same size in mutually perpendicular directions.
  • the sum of the cross-sectional areas of the holes 3 is 3% of the total surface of the cover 2. This proportion can range from 0.1% to 3% of the total surface.
  • the depth of the depressions is adapted to the size of the holes and the intended degree of damping of the resonators.
  • the box 1 shown in FIGS. 1 and 2 could also be designed as a frame and a cover corresponding to the cover 2 could be provided on the side of the frame opposite the cover 2.
  • the backdrops are arranged in such a way that a gas flow, the noise of which is to be damped, flows past the covers provided with the holes.
  • a cover is provided, in which triangular recesses 14 are provided in cross section, which can be produced advantageously and with little effort by folding a sheet metal sheet forming the cover.
  • punctiform depressions 104a are introduced by the spacer elements, which put the filling 105 on to prevent the cover 102 are formed. These depressions can, if appropriate also together with beads, be embossed in one step into a sheet metal sheet forming the cover 102 using the deep-drawing process.
  • the bulges can in particular be designed so that they form a closed cavity of predetermined dimensions and volume around an opening between the cover and the filling.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Exhaust Silencers (AREA)
EP19900125461 1990-03-09 1990-12-24 Resonator screen for a sound damping screen Withdrawn EP0445431A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4007556 1990-03-09
DE19904007556 DE4007556C2 (de) 1990-03-09 1990-03-09 Resonatorkulisse für Kulissenschalldämpfer

Publications (2)

Publication Number Publication Date
EP0445431A2 true EP0445431A2 (fr) 1991-09-11
EP0445431A3 EP0445431A3 (en) 1992-10-21

Family

ID=6401839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900125461 Withdrawn EP0445431A3 (en) 1990-03-09 1990-12-24 Resonator screen for a sound damping screen

Country Status (2)

Country Link
EP (1) EP0445431A3 (fr)
DE (1) DE4007556C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504629A3 (en) * 1991-03-20 1993-06-16 Arthur Fries Panel-like element, in particular for sound absorbing arrangements, and sound absorbing arrangement
EP0584442A1 (fr) * 1992-08-25 1994-03-02 Firma Carl Freudenberg Elément de revêtement
US5422446A (en) * 1991-03-20 1995-06-06 Fries; Arthur Panel shaped element, specifically for sound absorbing structures and a sound absorbing installation
DE10122617C1 (de) * 2001-05-10 2002-06-20 Lta Lufttechnische Komponenten Schalldämpferkulisse für Anlagen der Lüftungstechnik
US6622818B2 (en) * 1997-09-11 2003-09-23 Hrl Technology Pty Ltd. Sound attenuating device
EP1418569A1 (fr) * 2002-11-06 2004-05-12 Calsonic Kansei Corporation Atténuateur acoustique pour un système de gaz d'échappement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2303610A1 (de) * 1973-01-25 1974-08-08 Costa Silard Dipl I Vasiljevic Schalldaempfer
FR2396868A1 (fr) * 1977-07-07 1979-02-02 Snecma Garniture insonorisante pour paroi interne de conduit de gaz, notamment de conduit de turboreacteur
DK4379A (da) * 1979-01-04 1980-07-05 Daempa As Lydabsorberingsaggregat
FR2462522A1 (fr) * 1979-07-27 1981-02-13 Scal Gp Condit Aluminium Panneau d'isolation acoustique industrielle
DE8525130U1 (de) * 1985-09-03 1985-10-24 Gerb Akustik Consult GmbH, 4300 Essen Schalldämpferkulisse

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504629A3 (en) * 1991-03-20 1993-06-16 Arthur Fries Panel-like element, in particular for sound absorbing arrangements, and sound absorbing arrangement
US5422446A (en) * 1991-03-20 1995-06-06 Fries; Arthur Panel shaped element, specifically for sound absorbing structures and a sound absorbing installation
EP0584442A1 (fr) * 1992-08-25 1994-03-02 Firma Carl Freudenberg Elément de revêtement
US6622818B2 (en) * 1997-09-11 2003-09-23 Hrl Technology Pty Ltd. Sound attenuating device
DE10122617C1 (de) * 2001-05-10 2002-06-20 Lta Lufttechnische Komponenten Schalldämpferkulisse für Anlagen der Lüftungstechnik
EP1418569A1 (fr) * 2002-11-06 2004-05-12 Calsonic Kansei Corporation Atténuateur acoustique pour un système de gaz d'échappement

Also Published As

Publication number Publication date
DE4007556C2 (de) 1998-05-07
EP0445431A3 (en) 1992-10-21
DE4007556A1 (de) 1991-09-12

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