Patents Assigned to RSM Technologies Limited
  • Sound attenuating structures
    Patent number: 7395898
    Abstract: There is disclosed a sound attenuation panel comprising, a rigid frame divided into a plurality of individual cells, a sheet of a flexible material, and a plurality of weights. Each weight is fixed to the sheet of flexible material such that each cell is provided with a respective weight and the frequency of the sound attenuated can be controlled by suitable selecting the mass of the weight.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: July 8, 2008
    Assignee: RSM Technologies Limited
    Inventors: Zhi Yu Yang, Weijia Wen, Ping Sheng, Xixiang Zhang
  • Acoustic attenuation materials
    Patent number: 7249653
    Abstract: Acoustic attenuation materials are described that comprise outer layers of a stiff material sandwiching a relatively soft elastic material therebetween, with means such as spheres, discs or wire mesh being provided within the elastic material for generating local mechanical resonances that function to absorb sound energy at tunable wavelengths.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: July 31, 2007
    Assignee: RSM Technologies Limited
    Inventors: Ping Sheng, Man Tse, Che Ting Chan, Xi Xiang Zhang, Zongjin Li, Nelson Cue, Weijia Wen
  • Sound attenuating structures
    Publication number: 20050194209
    Abstract: There is disclosed a sound attenuation panel comprising, a rigid frame divided into a plurality of individual cells, a sheet of a flexible material, and a plurality of weights. Each weight is fixed to the sheet of flexible material such that each cell is provided with a respective weight and the frequency of the sound attenuated can be controlled by suitable selecting the mass of the weight.
    Type: Application
    Filed: March 5, 2004
    Publication date: September 8, 2005
    Applicant: RSM TECHNOLOGIES LIMITED
    Inventors: Zhi Yang, Weijia Wen, Ping Sheng, Xixiang Zhang