FR2083045A5 - - Google Patents

Info

Publication number
FR2083045A5
FR2083045A5 FR7102497A FR7102497A FR2083045A5 FR 2083045 A5 FR2083045 A5 FR 2083045A5 FR 7102497 A FR7102497 A FR 7102497A FR 7102497 A FR7102497 A FR 7102497A FR 2083045 A5 FR2083045 A5 FR 2083045A5
Authority
FR
France
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
Application number
FR7102497A
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR2083045A5 publication Critical patent/FR2083045A5/fr
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D33/00—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
    • B64D33/04—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for of exhaust outlets or jet pipes
    • B64D33/06—Silencing exhaust or propulsion jets
    • 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
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • 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
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
FR7102497A 1970-02-26 1971-01-26 Expired FR2083045A5 (OSRAM)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702009105 DE2009105A1 (de) 1970-02-26 1970-02-26 Larmminderung bei Propellertriebwerken

Publications (1)

Publication Number Publication Date
FR2083045A5 true FR2083045A5 (OSRAM) 1971-12-10

Family

ID=5763477

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7102497A Expired FR2083045A5 (OSRAM) 1970-02-26 1971-01-26

Country Status (4)

Country Link
US (1) US3685610A (OSRAM)
DE (1) DE2009105A1 (OSRAM)
FR (1) FR2083045A5 (OSRAM)
GB (1) GB1304329A (OSRAM)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936606A (en) * 1971-12-07 1976-02-03 Wanke Ronald L Acoustic abatement method and apparatus
JPS5298585U (OSRAM) * 1976-01-22 1977-07-25
US4473906A (en) * 1980-12-05 1984-09-25 Lord Corporation Active acoustic attenuator
GB2126837B (en) * 1982-08-19 1986-07-23 British Aerospace Noise suppression
US4562589A (en) * 1982-12-15 1985-12-31 Lord Corporation Active attenuation of noise in a closed structure
GB8405914D0 (en) * 1984-03-07 1984-04-11 Swinbanks M A Reducing noise by cancellation
US5156353A (en) * 1987-04-13 1992-10-20 General Electric Company Aircraft pylon
US4966338A (en) * 1987-08-05 1990-10-30 General Electric Company Aircraft pylon
DE3735421A1 (de) * 1987-10-20 1989-05-11 Deutsche Forsch Luft Raumfahrt Verfahren zur minderung des ueberfluggeraeusches von flugzeugen mit einem von einem kolbenmotor getriebenen propeller
US5479251A (en) * 1993-12-30 1995-12-26 Corning Incorporated Methods for determining optical properties of optical waveguide fibers using an optical time domain reflectometer
US5713438A (en) * 1996-03-25 1998-02-03 Lord Corporation Method and apparatus for non-model based decentralized adaptive feedforward active vibration control
DE19803947C1 (de) 1998-02-02 1999-03-18 Deutsch Zentr Luft & Raumfahrt Anordnung und Verfahren zur Minderung des Überfluggeräusches von Propellerflugzeugen
US6768799B1 (en) 2000-03-23 2004-07-27 Maytag Corporation Appliance incorporating sound cancellation system
FR2959342B1 (fr) * 2010-04-27 2012-06-15 Snecma Procede de traitement des ondes acoustiques emises en sortie d'un turbomoteur d'un aeronef avec un dispositif a decharge a barriere dielectrique et aeronef comprenant un tel dispositif
FR2959341B1 (fr) * 2010-04-27 2021-06-25 Snecma Procede de traitement des ondes acoustiques emises en sortie d'un turbomoteur d'un aeronef avec un dispositif piezoelectrique et aeronef comprenant un tel dispositif
US8590827B2 (en) * 2011-09-07 2013-11-26 Textron Innovations Inc. Rijke tube cancellation device for helicopters
US9816529B2 (en) 2013-03-15 2017-11-14 Kcf Technologies, Inc. Propeller sound field modification systems and methods
US9394045B2 (en) 2013-03-15 2016-07-19 Kcf Technologies, Inc. Propeller sound field modification systems and methods
CN103807220B (zh) * 2013-12-24 2016-03-23 国家电网公司 双旋主动式风机降噪总成
DE102015226048B4 (de) * 2015-12-18 2020-07-16 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Ermittlung und/oder Anpassung des von einer Abgasanlage emittierten Schalls und Steuereinheit dafür
DE102017000132A1 (de) * 2017-01-09 2018-07-12 Reinhard Steeg Gegenschallanlagen für Luft-, Land-, Wasser- und Schienenfahrzeuge usw.
TWI640981B (zh) * 2017-12-05 2018-11-11 財團法人船舶暨海洋產業研發中心 螺槳噪音之分析方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US811140A (en) * 1905-04-01 1906-01-30 Edythe Prudence Garney Telephone or other booth.
US2043416A (en) * 1933-01-27 1936-06-09 Lueg Paul Process of silencing sound oscillations
FR859276A (fr) * 1939-05-04 1940-12-14 Silencieux
US2783008A (en) * 1951-07-28 1957-02-26 Jr Albert G Bodine Acoustical boundary layer control for aerodynamic bodies
US2853852A (en) * 1956-12-10 1958-09-30 Jr Albert G Bodine Boundary layer control for aerodynamic ducts

Also Published As

Publication number Publication date
DE2009105A1 (de) 1971-09-02
GB1304329A (OSRAM) 1973-01-24
US3685610A (en) 1972-08-22

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Legal Events

Date Code Title Description
ST Notification of lapse