GB1289288A - - Google Patents

Info

Publication number
GB1289288A
GB1289288A GB1289288DA GB1289288A GB 1289288 A GB1289288 A GB 1289288A GB 1289288D A GB1289288D A GB 1289288DA GB 1289288 A GB1289288 A GB 1289288A
Authority
GB
United Kingdom
Prior art keywords
sound
grating
antiphase
incident
source
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.)
Expired
Application number
Other languages
English (en)
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 filed Critical
Publication of GB1289288A publication Critical patent/GB1289288A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0094—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic constructions for generation of phase shifting
    • 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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17861—Methods, e.g. algorithms; Devices using additional means for damping sound, e.g. using sound absorbing panels
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/103—Three dimensional
    • 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
    • G10K2210/12—Rooms, e.g. ANC inside a room, office, concert hall or automobile cabin
    • 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
    • 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
    • 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
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3229—Transducers
    • G10K2210/32291—Plates or thin films, e.g. PVDF
GB1289288D 1969-04-12 1970-03-20 Expired GB1289288A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691918741 DE1918741A1 (de) 1969-04-12 1969-04-12 Schallabschirmung durch Schallgitter

Publications (1)

Publication Number Publication Date
GB1289288A true GB1289288A (de) 1972-09-13

Family

ID=5731078

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1289288D Expired GB1289288A (de) 1969-04-12 1970-03-20

Country Status (4)

Country Link
US (1) US3602331A (de)
DE (1) DE1918741A1 (de)
FR (1) FR2041167B1 (de)
GB (1) GB1289288A (de)

Families Citing this family (11)

* 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
US3879578A (en) * 1973-06-18 1975-04-22 Theodore Wildi Sound masking method and system
DE2814093C2 (de) * 1978-04-01 1980-05-14 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Antischallgeber
US4449235A (en) * 1982-07-14 1984-05-15 The United States Of America As Represented By The Secretary Of The Air Force Electronic cancelling of acoustic traveling waves
GB8418056D0 (en) * 1984-07-16 1984-08-22 Roberts J P Active control of acoustic instability in combustion chambers
US5256113A (en) * 1992-04-29 1993-10-26 Ford Motor Company Automotive accessory drive belt tensioner
CA2145862C (en) * 1992-10-08 1999-03-09 Christopher R. Fuller Active acoustic transmission loss box
US5692053A (en) * 1992-10-08 1997-11-25 Noise Cancellation Technologies, Inc. Active acoustic transmission loss box
US5812684A (en) * 1995-07-05 1998-09-22 Ford Global Technologies, Inc. Passenger compartment noise attenuation apparatus for use in a motor vehicle
DE10002984C1 (de) * 2000-01-24 2001-08-09 Daimler Chrysler Ag Akustischer Absorber und Verfahren zur Schallabsorption
US20040125922A1 (en) * 2002-09-12 2004-07-01 Specht Jeffrey L. Communications device with sound masking system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563648A (en) * 1948-05-25 1951-08-07 Jr John Hays Hammond Microphone system having automatic volume level sensitivity
US2983790A (en) * 1953-04-30 1961-05-09 Rca Corp Electronic sound absorber
US2893508A (en) * 1955-07-14 1959-07-07 Bolt Beranek & Newman Method of and apparatus for acoustic silencing
DE1098730B (de) * 1957-07-01 1961-02-02 Licentia Gmbh Einrichtung zur Daemmung des von Gehaeusen abgestrahlten Geraeusches

Also Published As

Publication number Publication date
DE1918741A1 (de) 1970-10-15
FR2041167A1 (de) 1971-01-29
US3602331A (en) 1971-08-31
FR2041167B1 (de) 1973-01-12

Similar Documents

Publication Publication Date Title
US3612211A (en) Method of producing locally occurring infrasound
GB1289288A (de)
AU1698670A (en) Method of generating electricity and electrical generator
GB1510691A (en) Electronic singing suppressor device
AU473382B2 (en) Two-dimensional coils for electromagnetic generation and detection of acoustic waves
BE844953A (fr) Montage generateur de sons
FR1519914A (fr) Procédé de montage des moteurs électriques de faible puissance et moteurs ainsi assemblés
CA951011A (en) Acoustic impulse generator for producing seismic signals
NO141817C (no) Anlegg til sending av ultralydboelger
GB1420201A (en) Method and apparatus for producing sound
JPS5434228A (en) Back load horn speaker system
JPS5244588A (en) Disturbance detection system
JPS52127140A (en) Receiver
JPS5392123A (en) Method of mounting speaker
ES367887A1 (es) Un aparato para transformar el sonido de energia electrica.
CA847509A (en) Method of low frequency electric impulse metal working and generators for producing impulses needed to accomplish the same method
JPS5386939A (en) Electric wave noise prevention of engine
JPS5221802A (en) Three dimensional space sound reproduction system
JPS53123609A (en) Sound signal level control system
JPS5627598A (en) Microphone
ES339010A1 (es) Dispositivo para la transformacion de impulsos electricos en ondas de sonido.
ES242562A3 (es) Perfeccionamientos en los sistemas de telecomunicaciën electrico-alambre en frecuencias audibles
Greenhough et al. Experiments on the pitch of signals derived from three-tone complexes
CA812989A (en) Transducer and method of converting mechanical energy to electrical energy
AU436989B2 (en) Acoustic impulse generator and method for producing seismic signals

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees