Patents by Inventor Yat-Sze Choy

Yat-Sze Choy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods for designing a chamber to reduce noise in a duct
    Patent number: 6988057
    Abstract: Low-frequency duct noise is relatively difficult to deal with by passive methods such as porous duct lining. Reactive methods like expansion chamber are rather bulky, while compact resonators are to narrow-banded. This invention shows that a suitably stetched thin membrane backed by a slender cavity can achieve a satisfactory performance from low to medium frequencies over an octave band.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: January 17, 2006
    Assignee: The Hong Kong Polytechnic University
    Inventors: Lixi Huang, Yat-Sze Choy
  • Methods for designing a chamber to reduce noise in a duct
    Publication number: 20050096882
    Abstract: Low-frequency duct noise is relatively difficult to deli with by passive methods such as porous duct lining. Reactive methods like expansion chamber are rather bulky, while compact resonators are too narrow-banded. This invention shows that a suitably stretched thin membrane backed by a slender cavity can achieve a satisfactory performance from low to medium frequencies over an octave band.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 5, 2005
    Applicant: The Hong Kong Polytechnic University
    Inventors: Lixi Huang, Yat-Sze Choy