DE2527642A1 - Verfahren und einrichtung zur daempfung von longitudinaldruckwellen in gasleitungen - Google Patents

Verfahren und einrichtung zur daempfung von longitudinaldruckwellen in gasleitungen

Info

Publication number
DE2527642A1
DE2527642A1 DE19752527642 DE2527642A DE2527642A1 DE 2527642 A1 DE2527642 A1 DE 2527642A1 DE 19752527642 DE19752527642 DE 19752527642 DE 2527642 A DE2527642 A DE 2527642A DE 2527642 A1 DE2527642 A1 DE 2527642A1
Authority
DE
Germany
Prior art keywords
line
loop
frequency
phase
cancellation
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.)
Pending
Application number
DE19752527642
Other languages
German (de)
English (en)
Inventor
Laurence Arthur Walker
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.)
Sound Attenuators Ltd
Original Assignee
Sound Attenuators Ltd
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 Sound Attenuators Ltd filed Critical Sound Attenuators Ltd
Publication of DE2527642A1 publication Critical patent/DE2527642A1/de
Pending legal-status Critical Current

Links

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
    • F16L55/04—Devices damping pulsations or vibrations in fluids
    • 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
    • G10K11/1781—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17813—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
    • G10K11/17819—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the reference signals, e.g. to prevent howling
    • 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
    • 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
    • G10K2210/30—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
    • G10K2210/3039—Nonlinear, e.g. clipping, numerical truncation, thresholding or variable input and output gain
    • 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)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Duct Arrangements (AREA)
DE19752527642 1974-06-21 1975-06-20 Verfahren und einrichtung zur daempfung von longitudinaldruckwellen in gasleitungen Pending DE2527642A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27679/74A GB1512014A (en) 1974-06-21 1974-06-21 Method of attenuating longitudinal compression waves travelling in a gas filled duct

Publications (1)

Publication Number Publication Date
DE2527642A1 true DE2527642A1 (de) 1976-01-08

Family

ID=10263521

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752527642 Pending DE2527642A1 (de) 1974-06-21 1975-06-20 Verfahren und einrichtung zur daempfung von longitudinaldruckwellen in gasleitungen

Country Status (7)

Country Link
BE (1) BE830489A (fr)
DE (1) DE2527642A1 (fr)
FR (1) FR2275722A1 (fr)
GB (1) GB1512014A (fr)
NO (1) NO752163L (fr)
SE (1) SE7507087L (fr)
ZA (1) ZA753895B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4441217A1 (de) * 1993-12-17 1995-06-29 Escher Wyss Gmbh Verfahren zur Dämpfung von Druckstößen sowie Vorrichtung zur Durchführung des Verfahrens
DE10021031A1 (de) * 2000-05-02 2001-11-08 Mann & Hummel Filter Leitungssystem mit elektromechanischem Wandler zur Erzeugung eines Korrekturgeräusches

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386881A1 (fr) * 1977-04-05 1978-11-03 Sound Attenuators Ltd Perfectionnements relatifs a l'attenuation active de sons
EP0040462A1 (fr) * 1980-05-16 1981-11-25 Bose Corporation Appareil électro-acoustique pour réduire le bruit audible
US4473906A (en) * 1980-12-05 1984-09-25 Lord Corporation Active acoustic attenuator
FR2740599B1 (fr) * 1995-10-30 1997-12-19 Technofirst Dispositif d'attenuation acoustique active destine a etre dispose a l'interieur d'un conduit, en particulier pour l'insonorisation de reseau de ventilation et/ou de climatisation
FR2783869B1 (fr) * 1998-09-24 2000-12-22 Ecia Equip Composants Ind Auto Systeme anti-bruit de ligne d'echappement de vehicule automobile
GB2362058A (en) * 2000-05-04 2001-11-07 Thorn Security Equalising transfer functions of linear electro-acoustic systems
FR2843999B1 (fr) * 2002-09-03 2006-01-27 Comptoir De La Technologie Dispositif actif d'attenuation du bruit de bouche au niveau d'un conduit d'echappement ou d'admission
US6792907B1 (en) 2003-03-04 2004-09-21 Visteon Global Technologies, Inc. Helmholtz resonator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4441217A1 (de) * 1993-12-17 1995-06-29 Escher Wyss Gmbh Verfahren zur Dämpfung von Druckstößen sowie Vorrichtung zur Durchführung des Verfahrens
DE4441217C2 (de) * 1993-12-17 1998-09-10 Voith Sulzer Papiermasch Gmbh Verfahren zur Dämpfung von Druckstößen sowie Vorrichtung zur Durchführung des Verfahrens
DE10021031A1 (de) * 2000-05-02 2001-11-08 Mann & Hummel Filter Leitungssystem mit elektromechanischem Wandler zur Erzeugung eines Korrekturgeräusches

Also Published As

Publication number Publication date
FR2275722B1 (fr) 1981-06-19
NO752163L (fr) 1975-12-23
ZA753895B (en) 1976-05-26
BE830489A (fr) 1975-10-16
SE7507087L (sv) 1975-12-22
AU8232575A (en) 1976-12-23
FR2275722A1 (fr) 1976-01-16
GB1512014A (en) 1978-05-24

Similar Documents

Publication Publication Date Title
DE3144052C2 (fr)
DE68907265T2 (de) Aktive akustische Dämpfungsanordnung mit Differenzfilterung.
DE69835644T2 (de) Akustischer Echokompensator
DE69931637T2 (de) Verfahren zur reduzierung von nulldurchgangsverzerrungen und rauschen in einem verstärker, verstärker sowie anwendung dieses verfahrens und verstärkers
DE2207141C3 (de) Schaltungsanordnung zur Unterdrückung unerwünschter Sprachsignale mittels eines vorhersagenden Filters
EP1258865B1 (fr) Dispositif pour améliorer l'intelligibilité de signaux audio contenant de la parole
DE2635453A1 (de) Geraeuschunterdrueckungsgeraet
DE102013006163A1 (de) Störgeräuschbeseitigungsverfahren
DE2446982A1 (de) Verfahren fuer den betrieb von lautsprecheranlagen
EP1192837B1 (fr) Procede pour traiter un signal audio
DE2527642A1 (de) Verfahren und einrichtung zur daempfung von longitudinaldruckwellen in gasleitungen
DE102016118712A1 (de) Sonar basierend auf Ultraschallrauschen
DE3342928A1 (de) Aktive akustische daempfungseinrichtung
DE102019123971B4 (de) Aktives lärmkompensationssystem und verfahren
DE602004013465T2 (de) Audiosystem mit vorkehrungen zum filterkoeffizienten kopieren
DE3025391C2 (fr)
DE2507428A1 (de) Verfahren und vorrichtung zur unterdrueckung oder abschwaechung der schallfortpflanzung
DE1499327A1 (de) Rechenanlage
DE19832517A1 (de) Verfahren und Vorrichtung zur Steuerung eines aktiven Schalldämpfers
DE2451278C2 (de) Verfahren zur Löschung akustischer Rückkopplung zwischen einer Mikrophonanordnung und einer elektrisch verbundenen Lautsprecheranordnung und elektrische Schaltung zur Durchführung des Verfahrens
WO2004030333A1 (fr) Terminal de communication a elargissement de largeur de bande et compensation d'echo
DE102007012611A1 (de) Vorrichtung und Verfahren zur aktiven Schalldämpfung in einem geschlossenen Innenraum
DE1903623C3 (de) Elektrischer Sprach-Synthetisator
DE102012008557B4 (de) Verfahren zur Rückkopplungsunterdrückung in elektroakustischen Systemen
DE19743192A1 (de) Echokompensationsverfahren, Echokompensationsvorrichtung und Telekommunikationsgerät

Legal Events

Date Code Title Description
OHJ Non-payment of the annual fee