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Method and apparatus for low frequency active attenuation 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G10K-011/16
  • F16L-055/02
출원번호 US-0491324 (1983-04-11)
우선권정보 GB-0024567 (1981-08-11)
국제출원번호 PCT/GB82/00250 (1982-08-10)
§371/§102 date 19830411 (19830411)
국제공개번호 WO-8300580 (1983-02-17)
발명자 / 주소
  • Chaplin George B. B. (Colchester GBX) Jones Andrew (Colchester GBX) Jones Owen (Doncaster GBX)
출원인 / 주소
  • Sound Attenuators Limited (Essex GBX 03)
인용정보 피인용 횟수 : 36  인용 특허 : 0

초록

A low frequency attenuation method based on the virtual earth system has the driver feeding cancelling waveforms into a partially closed volume which contains the microphone of the virtual earth feed-back loop. The volume preferably has a maximum dimensions which lies between one third and one seven

대표청구항

A method of attenuating low frequency gas-borne primary vibrations using the virtual earth system comprising locating a pressure microphone (1) in the near field of a driver (2), enclosing the microphone (1) in an acoustically partially closed volume (4) whose largest dimension is smaller than the w

이 특허를 인용한 특허 (36)

  1. Eriksson Larry J. (Madison WI), Active attenuation system with on-line modeling of speaker, error path and feedback pack.
  2. Proksch, Roger, Active damping of high speed scanning probe microscope components.
  3. Proksch, Roger, Active damping of high speed scanning probe microscope components.
  4. Kr체ger,Jan; Castor,Frank, Active exhaust muffler.
  5. Krueger, Jan; Castor, Frank, Active muffler for an exhaust system.
  6. Miller Scott ; Shipps J. Clay, Active noise cancelling muffler.
  7. Dekker Nicolaas M. J. (Pinner GB2) Edwards John W. (Pinner GB2) James Adrian W. (London GB2), Active noise control.
  8. Patrick William P., Active noise control using phased-array active resonators.
  9. Eriksson Larry J. (Madison WI), Active sound attenuation system with on-line adaptive feedback cancellation.
  10. Donald R. Gasner, Actively control sound transducer.
  11. Parkins, John Warren, Adaptive feedback controller with open-loop transfer function reference suited for applications such as active noise control.
  12. Mondragon, Christopher K.; Greig, Nigel; Scholten, Edward; Moody, Roy; Simmonds, Paul; Clarke, Elaine; Darbonne, Thomas Allen, Airline passenger seat modular user interface device.
  13. von Flotow Andreas H. ; Mercadal Mathieu ; Tappert Peter M., Apparatus and method for active control of sound transmission through aircraft fuselage walls.
  14. Busse, Stefan; Heuwinkel, Claus; Enghardt, Lars; Röhle, Ingo, Apparatus and method for improving the damping of acoustic waves.
  15. Proksch, Roger; Callahan, Roger C.; Stetter, Frank; Limpoco, Ted; Hohlbach, Sophia; Bemis, Jason; Cleveland, Jason, Automated atomic force microscope and the operation thereof.
  16. Proksch, Roger; Callahan, Roger C.; Stetter, Frank; Limpoco, Ted; Hohlbauch, Sophia; Bemis, Jason; Cleveland, Jason; Geiss, Nicholas, Automated atomic force microscope and the operation thereof.
  17. Donaldson, Mark; Steyn, Andre; Guiu, Pierre Victor Manuel; Givernet, Damien Oliver; Sim, William James, Component for noise reducing earphone.
  18. Yamaguchi Atsushi,JPX ; Furuya Hiroyuki,JPX, Configuration of providing microphone in duct and active noise reduction device using same.
  19. Krueger, Jan; Leistner, Philip, Controlled acoustic waveguide for soundproofing.
  20. Eriksson Larry J. (Madison WI) Allie Mark C. (Oregon WI) Hoops Richard H. (Stoughton WI), Hybrid active silencer.
  21. Darlington, Paul; Azmi, Yacine; Lefebvre, Mickael Bernard Andre; Hewitt, Oliver Michael James, In-ear device incorporating active noise reduction.
  22. Ryan,Jim G.; Csermak,Brian D., Low-noise directional microphone system.
  23. Shoureshi Rahmat (West Lafayette IN), Method and apparatus for intelligent active and semi-active vibration control.
  24. Lyon,Richard H.; Bowen,David L.; Unger,Gladys L., Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation.
  25. Garabedian, Christian, Method and device for attenuating the noise generated at the outlet of an exhaust line.
  26. Taylor Brian A. (Felixstowe GB2 4), Method of transfer function generation and active noise cancellation in a vibrating system.
  27. Swinbanks Malcolm A. (Pentlands Close GB2), Methods and apparatus for reducing noise by cancellation.
  28. Andrea Douglas ; Topf Martin, Noise cancellation apparatus.
  29. Donaldson, Mark; Givernet, Damien Oliver, Noise cancellation earphone.
  30. Sakiyama Kazuhiro,JPX ; Sako Kazuya,JPX ; Nagami Masaaki,JPX ; Babasaki Masahiro,JPX, Noise control device.
  31. Fuller, Graeme Colin, Realisation of controller transfer function for active noise cancellation.
  32. Nakanishi Keiji (Takatsuki JPX) Sekiguchi Yasuyuki (Ibaraki JPX), Silencer.
  33. Cain John J. (Phoenix AZ) Barnes Dennis (Mesa AZ) Dye David A. (Phoenix AZ), Single cavity automobile muffler.
  34. Marash, Joseph; Berdugo, Baruch, Super directional beamforming design and implementation.
  35. Joseph Marash IL; Baruch Berdugo IL, System, method and apparatus for cancelling noise.
  36. Sim, William James; Greig, Nigel; Beck, Robert David; Nicklin, Mark, Vehicle media distribution system using optical transmitters.
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