HK46980A - Active control of sound waves - Google Patents

Active control of sound waves

Info

Publication number: HK46980A
Authority: HK; Hong Kong
Prior art keywords: sound waves; active control; active; control; waves
Prior art date: 1972-11-24

Application number

HK469/80A

Inventor

M A Swinbanks

Original Assignee

Nat Res Dev

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.)

1972-11-24

Filing date

1980-08-28

Publication date

1980-09-05

1980-08-28 Application filed by Nat Res Dev filed Critical Nat Res Dev

1980-09-05 Publication of HK46980A publication Critical patent/HK46980A/en

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/0333—Noise absorbers by means of an active system
- 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
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2200/00—Mathematical features
- F05D2200/10—Basic functions
- F05D2200/11—Sum
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
- F05D2260/962—Preventing, counteracting or reducing vibration or noise by means of "anti-noise"
- 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
- G10K2210/107—Combustion, e.g. burner noise control of jet engines
- 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
- G10K2210/112—Ducts
- 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
- G10K2210/128—Vehicles
- G10K2210/1281—Aircraft, e.g. spacecraft, airplane or helicopter
- 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
- G10K2210/301—Computational
- G10K2210/3011—Single acoustic input
- 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
- G10K2210/301—Computational
- G10K2210/3042—Parallel processing
- 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
- G10K2210/301—Computational
- G10K2210/3046—Multiple acoustic inputs, multiple acoustic outputs
- 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
- G10K2210/3219—Geometry of the configuration
- 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
- G10K2210/3229—Transducers
- 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
- G10K2210/50—Miscellaneous
- G10K2210/506—Feedback, e.g. howling

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Multimedia (AREA)
General Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Soundproofing, Sound Blocking, And Sound Damping (AREA)
Exhaust Silencers (AREA)
Applications Or Details Of Rotary Compressors (AREA)
Structures Of Non-Positive Displacement Pumps (AREA)

HK469/80A 1972-11-24 1980-08-28 Active control of sound waves HK46980A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB5437072A GB1456018A (en)	1972-11-24	1972-11-24	Active control of sound waves

Publications (1)

Publication Number	Publication Date
HK46980A true HK46980A (en)	1980-09-05

Family

ID=10470785

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
HK469/80A HK46980A (en)	1972-11-24	1980-08-28	Active control of sound waves

Country Status (5)

Country	Link
JP (1)	JPS4997601A (en)
DE (1)	DE2358436A1 (en)
FR (1)	FR2208573A5 (en)
GB (1)	GB1456018A (en)
HK (1)	HK46980A (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2385972A2 (en) *	1977-04-01	1978-10-27	Anvar	ACTIVE ACOUSTICAL ABSORBERS FOR DUCTS
FR2386881A1 (en) *	1977-04-05	1978-11-03	Sound Attenuators Ltd	Active sound attenuation using secondary wave - has stored programme used to obtain signal representing secondary wave
JPS5462509A (en) *	1977-10-27	1979-05-19	Agency Of Ind Science & Technol	Blower-noise reducing method by phase control
DE3209617C2 (en) *	1982-03-17	1985-10-10	Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln	Low noise turbo working machine
GB8329218D0 (en) *	1983-11-02	1983-12-07	Ffowcs Williams J E	Reheat combustion system for gas turbine engine
GB8405914D0 (en) *	1984-03-07	1984-04-11	Swinbanks M A	Reducing noise by cancellation
GB2160742B (en) *	1984-06-21	1988-02-03	Nat Res Dev	Damping for directional sound cancellation
GB8610297D0 (en) *	1986-04-28	1986-10-01	Rolls Royce	Turbomachinery
JPS63140897A (en) *	1986-12-02	1988-06-13	Komatsu Ltd	Transverse blower
US4967550A (en) *	1987-04-28	1990-11-06	Rolls-Royce Plc	Active control of unsteady motion phenomena in turbomachinery
GB2204916B (en) *	1987-05-19	1991-10-16	British Gas Plc	A silencer
DE4011658A1 (en) *	1990-04-11	1991-10-17	Messerschmitt Boelkow Blohm	Anti-sound wave generator - incorporates at least fluidic amplifier with input and output connections
FR2740599B1 (en) *	1995-10-30	1997-12-19	Technofirst	ACTIVE ACOUSTIC MITIGATION DEVICE INTENDED TO BE ARRANGED WITHIN A DUCT, PARTICULARLY FOR SOUNDPROOFING A VENTILATION AND / OR AIR CONDITIONING NETWORK
US5828759A (en) *	1995-11-30	1998-10-27	Siemens Electric Limited	System and method for reducing engine noise
JP2972875B1 (en)	1998-06-18	1999-11-08	京都大学長	Noise reduction device for supersonic jet
EP1099050B1 (en) *	1998-07-22	2002-10-23	Friedmund Nagel	Device and method for actively reducing the noise emissions of jet engines and for diagnosing the same
GB9906258D0 (en)	1999-03-11	1999-09-15	Gkn Westland Helicopters Ltd	Apparatus from the suppression of infra red emissions from an engine
DE102014107234A1 (en) *	2014-05-22	2015-11-26	WaveScape Technologies GmbH	Arrangement for reducing sound
JP7039512B2 (en)	2019-03-12	2022-03-22	株式会社東芝	Rotor blade interference noise reduction system and air vehicle

1972
- 1972-11-24 GB GB5437072A patent/GB1456018A/en not_active Expired
1973
- 1973-11-23 DE DE2358436A patent/DE2358436A1/en not_active Ceased
- 1973-11-23 FR FR7341862A patent/FR2208573A5/fr not_active Expired
- 1973-11-24 JP JP48132110A patent/JPS4997601A/ja active Pending
1980
- 1980-08-28 HK HK469/80A patent/HK46980A/en unknown

Also Published As

Publication number	Publication date
GB1456018A (en)	1976-11-17
DE2358436A1 (en)	1974-05-30
JPS4997601A (en)	1974-09-14
FR2208573A5 (en)	1974-06-21

Publication	Publication Date	Title
AU5415873A (en)	1974-10-10	Acoustic transducer
HK46980A (en)	1980-09-05	Active control of sound waves
CA1021870A (en)	1977-11-29	Electro-acoustic transducer system
IE35948L (en)	1972-07-04	Electro acoustic transducer
CA963571A (en)	1975-02-25	Transducer
CA986510A (en)	1976-03-30	Complex of 7-dimethylamino-6-demethyl-6-deoxytetracycline hydrochloride
GB1439174A (en)	1976-06-09	Surround sound systems
GB1548362A (en)	1979-07-11	Active control of sound waves
CA969637A (en)	1975-06-17	Pressure-to-electric transducer
AU474093B2 (en)	1976-07-15	Chemosterilization of ixodides
CA974656A (en)	1975-09-16	Acoustic wave amplification system
AU461756B2 (en)	1975-06-05	Electrodeposition of iron active mass
AU473825B2 (en)	1976-07-01	Treatment of water
CA903878A (en)	1972-06-27	Acoustic transducer
CA904977A (en)	1972-07-11	Acoustic transducers
CA908801A (en)	1972-08-29	Electro-acoustic transducer
CA896754A (en)	1972-03-28	Ultrasonic wave microphone
CA905069A (en)	1972-07-18	Rotocasting of polystyrene
ZA73857B (en)	1973-11-28	Electroacoustic transducer
AU456143B2 (en)	1972-01-13	Dionisation of water
CA893888A (en)	1972-02-22	Sonar transducer
CA891306A (en)	1972-01-25	Construction of ships
CA890487A (en)	1972-01-11	Copolymers of benzimidazolone
CA901249A (en)	1972-05-30	Construction of silos
CA910672A (en)	1972-09-26	Transducer