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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)
GB1289288D 1969-04-12 1970-03-20 Expired GB1289288A (enrdf_load_stackoverflow)

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 (enrdf_load_stackoverflow) 1972-09-13

Family

ID=5731078

Family Applications (1)

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

Country Status (4)

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

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
WO1994009484A1 (en) * 1992-10-08 1994-04-28 Noise Cancellation Technologies, Inc. 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
US3602331A (en) 1971-08-31
FR2041167B1 (enrdf_load_stackoverflow) 1973-01-12
DE1918741A1 (de) 1970-10-15
FR2041167A1 (enrdf_load_stackoverflow) 1971-01-29

Similar Documents

Publication Publication Date Title
GB1289288A (enrdf_load_stackoverflow)
AU1698670A (en) Method of generating electricity and electrical generator
AU7345591A (en) Tinnitus masking device
GB1510691A (en) Electronic singing suppressor device
CA932063A (en) Powerful sound impulse generation methods and apparatus
JPS51122422A (en) Piezooelectric transducer unit and underwater acoustic receiver assembly
JPS5365718A (en) Sound wave generator
CA1023957A (en) Method and arrangement for the generation of energy particularly electrical energy
SE305894B (enrdf_load_stackoverflow)
JPS51146220A (en) Electronic acoustic sound generating method
GB988778A (en) Pulse generator
CA951011A (en) Acoustic impulse generator for producing seismic signals
JPS5434228A (en) Back load horn speaker system
JPS53132246A (en) Elastic surface wave filter
JPS5392123A (en) Method of mounting speaker
US1637397A (en) Telephone transmitter and receiver
ES367887A1 (es) Un aparato para transformar el sonido de energia electrica.
JPS51145128A (en) Vibration resisting and sound insulation method of structure
CA847509A (en) Method of low frequency electric impulse metal working and generators for producing impulses needed to accomplish the same method
Welch Acoustic surface wave implementation of video transforms
JPS5221802A (en) Three dimensional space sound reproduction system
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
HERMSEN et al. Suppression of combustion instability in rocket motors using electrothermal acoustics(Electrothermal acoustics model for predicting and suppressing combustion instability in rocket motors)
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