GB8306542D0 - Low noise fluid moving system - Google Patents

Low noise fluid moving system

Info

Publication number
GB8306542D0
GB8306542D0 GB838306542A GB8306542A GB8306542D0 GB 8306542 D0 GB8306542 D0 GB 8306542D0 GB 838306542 A GB838306542 A GB 838306542A GB 8306542 A GB8306542 A GB 8306542A GB 8306542 D0 GB8306542 D0 GB 8306542D0
Authority
GB
United Kingdom
Prior art keywords
low noise
moving system
fluid moving
noise fluid
low
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
GB838306542A
Other versions
GB2117046B (en
GB2117046A (en
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.)
DFVLR EV
Original Assignee
DFVLR EV
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 DFVLR EV filed Critical DFVLR EV
Publication of GB8306542D0 publication Critical patent/GB8306542D0/en
Publication of GB2117046A publication Critical patent/GB2117046A/en
Application granted granted Critical
Publication of GB2117046B publication Critical patent/GB2117046B/en
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
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • 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
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • 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
    • G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/109—Compressors, e.g. fans
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/121—Rotating machines, e.g. engines, turbines, motors; Periodic or quasi-periodic signals in general
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3212—Actuator details, e.g. composition or microstructure
    • G10K2210/32121—Fluid amplifiers, e.g. modulated gas flow speaker using electrovalves
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3216—Cancellation means disposed in the vicinity of the source
GB08306542A 1982-03-17 1983-03-09 Silencing in fluid flour impelling systems Expired GB2117046B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3209617A DE3209617C2 (en) 1982-03-17 1982-03-17 Low noise turbo working machine

Publications (3)

Publication Number Publication Date
GB8306542D0 true GB8306542D0 (en) 1983-04-13
GB2117046A GB2117046A (en) 1983-10-05
GB2117046B GB2117046B (en) 1985-07-10

Family

ID=6158445

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08306542A Expired GB2117046B (en) 1982-03-17 1983-03-09 Silencing in fluid flour impelling systems

Country Status (4)

Country Link
JP (1) JPS59600A (en)
DE (1) DE3209617C2 (en)
FR (1) FR2523658B1 (en)
GB (1) GB2117046B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8329218D0 (en) * 1983-11-02 1983-12-07 Ffowcs Williams J E Reheat combustion system for gas turbine engine
AT387045B (en) * 1985-06-29 1988-11-25 Voith Gmbh J M DEVICE FOR DAMPING VIBRATIONS IN TREATMENT SYSTEMS FOR FABRIC SUSPENSIONS, IN PARTICULAR PAPER FIBER FIBER SUSPENSIONS
US5233137A (en) * 1990-04-25 1993-08-03 Ford Motor Company Protective anc loudspeaker membrane
CA2113068A1 (en) * 1991-07-16 1993-02-04 Eldon W. Ziegler High efficiency fan with adaptive noise cancellation
SE500489C2 (en) * 1992-11-06 1994-07-04 Flaekt Ab Supply air device for ventilation air in ships
DE4408278A1 (en) * 1994-03-11 1995-09-14 Gaggenau Werke Extractor hood with at least partial cancellation of the fan noise

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225398A (en) * 1939-09-13 1940-12-17 Clyde M Hamblin Construction of ventilating fans
US3826870A (en) * 1970-03-20 1974-07-30 Quest Electronics Corp Noise cancellation
GB1456018A (en) * 1972-11-24 1976-11-17 Nat Res Dev Active control of sound waves
US4174020A (en) * 1975-07-01 1979-11-13 Challis Louis A Acoustic treatment for fans
GB1577322A (en) * 1976-05-13 1980-10-22 Bearcroft R Active attenuation of recurring vibrations
FR2370170A1 (en) * 1976-11-05 1978-06-02 Snecma METHOD AND DEVICE FOR REDUCING TURBOMACHINE NOISE
JPS545402A (en) * 1977-06-14 1979-01-16 Jinichi Nishiwaki Low frequency silencer
WO1981003201A1 (en) * 1980-04-28 1981-11-12 G Koopmann Noise reduction system
ZA824145B (en) * 1981-06-12 1983-04-27 Sound Attenuators Ltd Method and apparatus for reducing repetitive noise entering the ear

Also Published As

Publication number Publication date
GB2117046B (en) 1985-07-10
FR2523658B1 (en) 1988-06-03
FR2523658A1 (en) 1983-09-23
DE3209617A1 (en) 1983-10-06
DE3209617C2 (en) 1985-10-10
GB2117046A (en) 1983-10-05
JPS59600A (en) 1984-01-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee