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특허 상세정보

Fan and compressor noise attenuation

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H04R-005/00   
미국특허분류(USC) 381/017; 381/071.1; 181/204; 415/119
출원번호 US-0514141 (2000-02-28)
우선권정보 CA-2293076 (1999-12-22)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Ogilvy Renault LLP
인용정보 피인용 횟수 : 5  인용 특허 : 13
초록

An exciting sound wave generator is positioned within a nacelle of a jet engine at its inlet to generate an exciting sound wave having a primary frequency generally different from a frequency of the primary tone of the noise. The exciting sound wave is used to modulate the primary tone of the noise and, therefore, distribute sound energy of the noise from the primary tone to a broad range of side bands so that the amplitude of the primary tone of the noise is reduced.

대표
청구항

1. A method for suppressing noise dominated by a primary tone from a noise source within a duct housing comprising:generating an exciting sound wave dominated by a primary frequency generally within an audible range and different from a frequency of the primary tone of the noise, andmodulating the primary tone of the noise using the generated exciting sound wave to excite within the duct housing a fluid medium in which a sound wave of the noise propagates so that sound energy of the noise is re-distributed from the frequency of the primary tone to a broa...

이 특허에 인용된 특허 (13)

  1. Burdisso Ricardo (Blacksburg VA) Fuller Chris R. (Blacksburg VA) O\Brien Walter F. (Blacksburg VA) Thomas Russell H. (Blacksburg VA) Dungan Mary E. (Malden SC). Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors. USP1996055515444.
  2. Andersson Anders O. (Seattle WA). Active control of tone noise in engine ducts. USP1997125692702.
  3. Gliebe Philip R. (Waynesville OH). Active low noise fan assembly. USP1995125478199.
  4. Kato Masahiko (Nukata JPX) Katou Masanori (Toyoake JPX) Kuwakado Satosi (Nukata JPX) Tanaka Katsuyuki (Nishio JPX) Ito Koji (Anjo JPX). Active silencer. USP1989024805733.
  5. Michael Joseph DeLuca. Anti-sound beam method and apparatus. USP2002086434239.
  6. Newell John Keith ; Zwernemann Gregory Richard. Mechanism of noise suppression system for a supersonic aircraft. USP1998095801341.
  7. Andre Pierre A. (Paris FRX) Thevenin Jean-Claude P. H. P. (Saint-Maur-Des-Fosses FRX) Girault Jean-Pierre Y. B. (Dammarie Les Lys FRX) Richter Gerhard (Boissise Le Roi FRX). Method and device for reducing the noise of turbo-machines. USP1981034255083.
  8. Raffy Pierre M. (Saint-Germain Laxis FRX) Andre Pierre A. (Paris FRX) Girault Jean-Pierre Y. B. (Dammarie les Lys FRX) Richter Gerhard (Boissise le Roi FRX) Thevenin Jean-Claude P. H. P. (Saint-Maur-. Method and device for reducing the noise of turbo-machines. USP1980044199295.
  9. Bourk Terrance R. (San Diego CA). Noise cancellation headset. USP1993015182774.
  10. Nagami Masaaki (Kobe JPX) Motojima Akira (Akashi JPX) Kageyama Yoshihiro (Kobe JPX). Noise reducing device. USP1994035293578.
  11. Norris Elwood G.. Sound reduction method and system for jet engines. USP1999105966452.
  12. Zwernemann Gregory R.. Supersonic aircraft exhaust noise suppression system. USP1998105821472.
  13. Goto Akira,JPX ; Katsumata Tatsuyoshi,JPX. Turbomachine. USP1998015707206.