EP0029898A3 - Variable resonators for noise attenuation - Google Patents

Variable resonators for noise attenuation Download PDF

Info

Publication number
EP0029898A3
EP0029898A3 EP80106229A EP80106229A EP0029898A3 EP 0029898 A3 EP0029898 A3 EP 0029898A3 EP 80106229 A EP80106229 A EP 80106229A EP 80106229 A EP80106229 A EP 80106229A EP 0029898 A3 EP0029898 A3 EP 0029898A3
Authority
EP
European Patent Office
Prior art keywords
main frame
subframe
noise
vaulting
struts forming
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
EP80106229A
Other languages
German (de)
Other versions
EP0029898B1 (en
EP0029898A2 (en
Inventor
Oskar Dipl.-Ing.Dr. Bschorr
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Priority to AT80106229T priority Critical patent/ATE13232T1/en
Publication of EP0029898A2 publication Critical patent/EP0029898A2/en
Publication of EP0029898A3 publication Critical patent/EP0029898A3/en
Application granted granted Critical
Publication of EP0029898B1 publication Critical patent/EP0029898B1/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Laminated Bodies (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

A noise reducing resonator, herein referred to as a silator due to its noise silencing quality, is made up of primary struts forming a main frame and secondary struts forming at least one subframe enclosed by a vacuum tight cover to enclose a vaulting evacuated volume. Each frame has a given span width and a vaulting height corresponding to 0.005 to 0.05 times the respective span width. The frames are arranged in a hierarchic order which means that a larger main frame holds a smaller subframe which in turn holds a still smaller subframe and so on. The resonance frequency increases with the number of subframes held in a main frame. Interconnected silators may cover entire surface areas for noise reduction or absorption.
EP80106229A 1979-11-22 1980-10-14 Variable resonators for noise attenuation Expired EP0029898B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106229T ATE13232T1 (en) 1979-11-22 1980-10-14 VOLUME CHANGING RESONATORS FOR NOISE REDUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2947026A DE2947026C2 (en) 1979-11-22 1979-11-22 Silators to reduce noise
DE2947026 1979-11-22

Publications (3)

Publication Number Publication Date
EP0029898A2 EP0029898A2 (en) 1981-06-10
EP0029898A3 true EP0029898A3 (en) 1981-08-26
EP0029898B1 EP0029898B1 (en) 1985-05-08

Family

ID=6086587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106229A Expired EP0029898B1 (en) 1979-11-22 1980-10-14 Variable resonators for noise attenuation

Country Status (4)

Country Link
US (1) US4325461A (en)
EP (1) EP0029898B1 (en)
AT (1) ATE13232T1 (en)
DE (1) DE2947026C2 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3020830A1 (en) * 1980-06-02 1981-12-10 Messerschmitt-Bölkow-Blohm GmbH, 8000 München COINCIDENCE SILENCER
DE3217784C2 (en) * 1982-05-12 1985-12-19 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Sound-absorbing element with resonators
DE3217783C2 (en) * 1982-05-12 1985-12-19 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Sound-absorbing and sound-absorbing element with resonators
DE3241932A1 (en) * 1982-11-12 1984-05-17 Transformatoren Union Ag, 7000 Stuttgart TRANSFORMER WITH OIL-COOLED ACTIVE COMPONENT AND SOUND ABSORBING RESONATORS
DE3317103C2 (en) * 1983-05-10 1986-08-07 Metzeler Kautschuk GmbH, 8000 München Resonant, volume-changing resonator in the form of a silator
DE3347827A1 (en) * 1983-05-10 1985-03-07 Metzeler Kautschuk GmbH, 8000 München Resonating, variable-volume resonator in the form of a silator
DE3330471A1 (en) * 1983-08-24 1985-03-14 Metzeler Kautschuk GmbH, 8000 München Covibrating, variable-volume resonator in the form of a silator
US5267321A (en) * 1991-11-19 1993-11-30 Edwin Langberg Active sound absorber
DE19626167C1 (en) * 1996-06-29 1997-09-04 Coldewey Maik Volume-alternating resonator component
GB0304867D0 (en) * 2003-03-04 2003-04-09 Rickards M J A sound barrier vacuum panel
JP4227618B2 (en) * 2003-05-29 2009-02-18 リオン株式会社 Sound insulation structure and structure using the same
DE10332833B4 (en) * 2003-07-18 2005-07-28 Siemens Ag Silencer with surface membrane
DE102011006242A1 (en) 2011-03-28 2012-10-04 BSH Bosch und Siemens Hausgeräte GmbH Refrigerant circuit component and refrigeration device
CN103975385B (en) 2011-10-06 2018-04-10 Hrl实验室有限责任公司 High bandwidth anti-resonance vibration film
CN103137118B (en) 2011-11-30 2016-07-06 香港科技大学 Acoustic energy absorption metamaterial
CN102951795A (en) * 2012-03-21 2013-03-06 戴长虹 Vacuum glass without extraction opening and support and preparation method thereof
US8616330B1 (en) 2012-08-01 2013-12-31 Hrl Laboratories, Llc Actively tunable lightweight acoustic barrier materials
US11021870B1 (en) * 2013-03-14 2021-06-01 Hrl Laboratories, Llc Sound blocking enclosures with antiresonant membranes
US8857563B1 (en) 2013-07-29 2014-10-14 The Boeing Company Hybrid acoustic barrier and absorber
US8869933B1 (en) 2013-07-29 2014-10-28 The Boeing Company Acoustic barrier support structure
US9222229B1 (en) 2013-10-10 2015-12-29 Hrl Laboratories, Llc Tunable sandwich-structured acoustic barriers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773141A (en) * 1972-09-22 1973-11-20 G Thien Sound-proofing wall-forming structural element

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710335A (en) * 1952-12-30 1955-06-07 Cepco Inc Light diffusing and sound absorbing unit
DE2632290C3 (en) * 1976-07-17 1980-02-14 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Sound reduction through resonating resonators
DE2834823C2 (en) * 1978-08-09 1980-07-17 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Volume-changing resonators based on the disc spring principle
CH616980A5 (en) * 1976-09-02 1980-04-30 Saurer Ag Adolph Sound-insulating, wall-like component and use thereof
DE2650462A1 (en) * 1976-11-04 1978-05-11 Heinz Wendt Hollow partition wall for sound insulation - has two sheets of glass with separating gasket and vacuum space
DE2758041C2 (en) * 1977-12-24 1985-10-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Use of a component consisting of at least two films, in particular plastic films, arranged one above the other
US4228868A (en) * 1979-01-08 1980-10-21 Raczuk Richard C Muffler apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773141A (en) * 1972-09-22 1973-11-20 G Thien Sound-proofing wall-forming structural element

Also Published As

Publication number Publication date
EP0029898B1 (en) 1985-05-08
US4325461A (en) 1982-04-20
DE2947026B1 (en) 1980-11-27
ATE13232T1 (en) 1985-05-15
EP0029898A2 (en) 1981-06-10
DE2947026C2 (en) 1981-10-01

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