FR2482663A1 - Revetement d'isolation acoustique a couches multiples - Google Patents

Revetement d'isolation acoustique a couches multiples Download PDF

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Publication number
FR2482663A1
FR2482663A1 FR8108469A FR8108469A FR2482663A1 FR 2482663 A1 FR2482663 A1 FR 2482663A1 FR 8108469 A FR8108469 A FR 8108469A FR 8108469 A FR8108469 A FR 8108469A FR 2482663 A1 FR2482663 A1 FR 2482663A1
Authority
FR
France
Prior art keywords
layer
layers
coating according
acoustic impedance
fixed
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
FR8108469A
Other languages
English (en)
French (fr)
Other versions
FR2482663B1 (enExample
Inventor
John David Harvey
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Publication of FR2482663A1 publication Critical patent/FR2482663A1/fr
Application granted granted Critical
Publication of FR2482663B1 publication Critical patent/FR2482663B1/fr
Granted 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/24—Heat or noise insulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Exhaust Silencers (AREA)
  • Laminated Bodies (AREA)
FR8108469A 1980-05-17 1981-04-28 Revetement d'isolation acoustique a couches multiples Granted FR2482663A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8016395A GB2076049B (en) 1980-05-17 1980-05-17 Variable acoustic impedance lining

Publications (2)

Publication Number Publication Date
FR2482663A1 true FR2482663A1 (fr) 1981-11-20
FR2482663B1 FR2482663B1 (enExample) 1984-11-16

Family

ID=10513498

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8108469A Granted FR2482663A1 (fr) 1980-05-17 1981-04-28 Revetement d'isolation acoustique a couches multiples

Country Status (3)

Country Link
US (1) US4410065A (enExample)
FR (1) FR2482663A1 (enExample)
GB (1) GB2076049B (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750527A1 (fr) * 1996-06-28 1998-01-02 Bertin & Cie Structures d'absorption de bruit et parois constituees de ces structures
FR2915522A1 (fr) * 2007-04-30 2008-10-31 Airbus France Sas Panneau acoustique a caracteristique acoustique variable
FR2925208A1 (fr) * 2007-12-14 2009-06-19 Eurocopter France Structure absorbante pour l'attenuation de bruits generes notamment par un rotor et carenage comportant une telle structure
EP1701028A3 (en) * 2005-02-03 2009-12-09 United Technologies Corporation Acoustic liner with a nonuniform depth backwall

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US4921648A (en) * 1983-04-02 1990-05-01 Raychem Corporation Method of joining an article comprising a conductive polymer composition to a polymeric substrate
DE3504208A1 (de) * 1985-02-07 1986-08-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Schalldaempfer-box
US5022943A (en) * 1989-08-25 1991-06-11 Eften, Inc. Method of making thermoformably shaped fibreboard sandwich structures
US5175401A (en) * 1991-03-18 1992-12-29 Grumman Aerospace Corporation Segmented resistance acoustic attenuating liner
US5250764A (en) * 1992-10-16 1993-10-05 The United States Of America As Represented By The Administrator Of The National Aeroneutics And Space Administration Consecutive plate acoustic suppressor apparatus and methods
DE4340951A1 (de) * 1992-12-04 1994-06-09 Grumman Aerospace Corp Einstückiges Triebwerkeinlaß-Schallrohr
CA2164663C (en) * 1994-12-20 1999-08-10 David B. Martin Tackable acoustical-barrier panel
US5828759A (en) * 1995-11-30 1998-10-27 Siemens Electric Limited System and method for reducing engine noise
US6084971A (en) * 1997-06-10 2000-07-04 Siemens Electric Limited Active noise attenuation system
US5912442A (en) * 1997-07-02 1999-06-15 Trw Inc. Structure having low acoustically-induced vibration response
JP3310931B2 (ja) * 1997-09-25 2002-08-05 三菱重工業株式会社 ガスタービン排気煙道
BR9900914A (pt) * 1999-04-20 2000-10-24 Edmond Pol Jean Lepoutre Dispositivo controlador de porosidade em tubo helicoidal flexìvel acústico condutor de ar
US6217281B1 (en) * 1999-06-30 2001-04-17 Industrial Technology Research Institute Low-noise fan-filter unit
SE515528C2 (sv) 1999-12-07 2001-08-20 Saab Ab Anordning vid en akustisk absorbent
US20010046302A1 (en) * 2000-04-14 2001-11-29 Daly Paul D. Active noise cancellation optimized air gaps
US20010046300A1 (en) * 2000-04-17 2001-11-29 Mclean Ian R. Offline active control of automotive noise
US20010036279A1 (en) * 2000-05-08 2001-11-01 Daly Paul D. Active noise cancellation system
US20010036282A1 (en) * 2000-05-12 2001-11-01 Roy Haworth Active noise attenuation inlet microphone system
US6557665B2 (en) 2000-06-06 2003-05-06 Siemens Canada Limited Active dipole inlet using drone cone speaker driver
US6996242B2 (en) * 2000-06-06 2006-02-07 Siemens Vdo Automotive Inc. Integrated and active noise control inlet
US20020039422A1 (en) * 2000-09-20 2002-04-04 Daly Paul D. Driving mode for active noise cancellation
US6775384B2 (en) 2000-09-20 2004-08-10 Siemens Vdo Automotive Inc. Environmentally robust noise attenuation system
US6898289B2 (en) 2000-09-20 2005-05-24 Siemens Vdo Automotive Inc. Integrated active noise attenuation system and fluid reservoir
FR2814987B1 (fr) * 2000-10-11 2003-04-18 Valeo Climatisation Panneau de diffusion d'air pour vehicule automobile
FR2818421B1 (fr) * 2000-12-20 2003-03-28 Eads Airbus Sa Panneau acoustique sandwich a plusieurs degres de liberte
US6702061B2 (en) 2001-03-15 2004-03-09 Siemens Vdo Automotive, Inc. Environmentally protected microphone for an active noise control system
US6684977B2 (en) 2001-09-13 2004-02-03 Siemens Vdo Automotive, Inc. Speaker retention assembly for an active noise control system
WO2003028007A1 (en) * 2001-09-25 2003-04-03 Siemens Vdo Automotive Inc. Modular active noise cancellation air filter speaker and microphone assembly
US20030112981A1 (en) * 2001-12-17 2003-06-19 Siemens Vdo Automotive, Inc. Active noise control with on-line-filtered C modeling
US6817442B2 (en) * 2002-03-29 2004-11-16 Intel Corporation Acoustically insulated bezel
SE526406C2 (sv) * 2004-01-14 2005-09-06 Silvent Ab Ljuddämpare för pneumatiska maskiner
TWI242706B (en) * 2004-03-08 2005-11-01 Avance Technologies Inc Convective cooling chassis air guide
US9669593B2 (en) 2007-06-14 2017-06-06 The Boeing Company Light weight thermoplastic flex foam and hybrid duct system
JP2009062977A (ja) * 2007-08-15 2009-03-26 Rohr Inc 線形音響ライナー
JP5762284B2 (ja) * 2008-05-22 2015-08-12 スリーエム イノベイティブ プロパティズ カンパニー メッシュ層を含む多層吸音構造物
DE102009037956B4 (de) 2009-08-18 2024-06-06 MTU Aero Engines AG Turbinenaustrittsgehäuse
US9416752B2 (en) 2012-02-28 2016-08-16 Pratt & Whitney Canada Corp. Gas turbine exhaust having reduced jet noise
GB201209658D0 (en) 2012-05-31 2012-07-11 Rolls Royce Plc Acoustic panel
US8800714B2 (en) * 2012-06-26 2014-08-12 Hexcel Corporation Structure with active acoustic openings
WO2016190753A1 (en) 2015-05-25 2016-12-01 Dotterel Technologies Limited A shroud for an aircraft
US10460714B1 (en) 2016-02-05 2019-10-29 United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Broadband acoustic absorbers
US11774944B2 (en) 2016-05-09 2023-10-03 Strong Force Iot Portfolio 2016, Llc Methods and systems for the industrial internet of things
US10983507B2 (en) 2016-05-09 2021-04-20 Strong Force Iot Portfolio 2016, Llc Method for data collection and frequency analysis with self-organization functionality
US11327475B2 (en) 2016-05-09 2022-05-10 Strong Force Iot Portfolio 2016, Llc Methods and systems for intelligent collection and analysis of vehicle data
US11156998B2 (en) 2016-05-09 2021-10-26 Strong Force Iot Portfolio 2016, Llc Methods and systems for process adjustments in an internet of things chemical production process
US11097828B2 (en) 2017-07-24 2021-08-24 Dotterel Technologies Limited Shroud
CN112513976A (zh) 2018-05-16 2021-03-16 多特瑞尔技术有限公司 用于音频捕获的系统和方法
US12392292B2 (en) 2023-04-27 2025-08-19 Pratt & Whitney Canada Corp. Acoustic panel with active impedance control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB270708A (en) * 1926-05-07 1927-09-08 Julius Duffner Improvements in exhaust silencers for internal combustion engines
GB1306651A (en) * 1971-03-02 1973-02-14 Rolls Royce Air intakes for gas turbine engines
FR2317504A1 (fr) * 1975-06-23 1977-02-04 Short Brothers & Harland Ltd Structure absorbant les sons et moteur a turbine a gaz comprenant une telle structure
FR2347539A1 (fr) * 1976-04-05 1977-11-04 Rolls Royce Revetement acoustique pour conduit de soufflante canalisee de turboreacteur
US4104002A (en) * 1976-12-02 1978-08-01 General Electric Company Spiral strip acoustic treatment

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320668A (en) * 1941-08-15 1943-06-01 Harry A Smith Mechanical exhaust silencer
US2988302A (en) * 1959-01-14 1961-06-13 Gen Sound Control Inc Silencing means for aircraft
US3630312A (en) * 1969-11-07 1971-12-28 Rohr Corp Sound absorptive honeycomb sandwich panel with multilayer, porous, structural facing
US3937590A (en) * 1974-09-03 1976-02-10 General Electric Company Acoustic duct with peripherally segmented acoustic treatment
US4235303A (en) * 1978-11-20 1980-11-25 The Boeing Company Combination bulk absorber-honeycomb acoustic panels
US4294329A (en) * 1979-12-17 1981-10-13 Rohr Industries, Inc. Double layer attenuation panel with two layers of linear type material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB270708A (en) * 1926-05-07 1927-09-08 Julius Duffner Improvements in exhaust silencers for internal combustion engines
GB1306651A (en) * 1971-03-02 1973-02-14 Rolls Royce Air intakes for gas turbine engines
FR2317504A1 (fr) * 1975-06-23 1977-02-04 Short Brothers & Harland Ltd Structure absorbant les sons et moteur a turbine a gaz comprenant une telle structure
FR2347539A1 (fr) * 1976-04-05 1977-11-04 Rolls Royce Revetement acoustique pour conduit de soufflante canalisee de turboreacteur
US4104002A (en) * 1976-12-02 1978-08-01 General Electric Company Spiral strip acoustic treatment

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750527A1 (fr) * 1996-06-28 1998-01-02 Bertin & Cie Structures d'absorption de bruit et parois constituees de ces structures
EP0817164A1 (fr) * 1996-06-28 1998-01-07 Bertin & Cie Structures d'absorption de bruit et parois constituées de ces structures
US6332027B1 (en) 1996-06-28 2001-12-18 Bertin & Cie Noise-absorption structures and walls constituted thereby
EP1701028A3 (en) * 2005-02-03 2009-12-09 United Technologies Corporation Acoustic liner with a nonuniform depth backwall
FR2915522A1 (fr) * 2007-04-30 2008-10-31 Airbus France Sas Panneau acoustique a caracteristique acoustique variable
WO2008152259A3 (fr) * 2007-04-30 2009-02-12 Airbus France Panneau acoustique a caracteristique acoustique variable
US7963362B2 (en) 2007-04-30 2011-06-21 Airbus Operations Sas Acoustic panel having a variable acoustic characteristic
FR2925208A1 (fr) * 2007-12-14 2009-06-19 Eurocopter France Structure absorbante pour l'attenuation de bruits generes notamment par un rotor et carenage comportant une telle structure
US7779965B2 (en) 2007-12-14 2010-08-24 Eurocopter Absorbent structure for attenuating noise particular by a rotor-generator noise, and a rotor duct including such a structure
EP2071561A3 (fr) * 2007-12-14 2017-05-17 Airbus Helicopters Structure absorbante pour l'atténuation de bruits générés notamment par un rotor et carénage comportant une telle structure

Also Published As

Publication number Publication date
GB2076049A (en) 1981-11-25
US4410065A (en) 1983-10-18
FR2482663B1 (enExample) 1984-11-16
GB2076049B (en) 1983-10-26

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