Now showing items 1-7 of 7

    • Acoustic performance of a stretched membrane and porous blanket combination 

      Thomas, W. A., Jr.; Hurst, Charles J. (Acoustical Society of America, 1976)
      The sound absorption performance of an acoustic absorber consisting of a stretched circular membrane placed a short distance in front of a fiberglass blanket was both measured and predicted. Both theoretical and experimental ...
    • Adaptive feedforward and feedback methods for active/passive sound radiation control using smart foam 

      Guigou, Catherine; Fuller, Chris R. (Acoustical Society of America, 1998-07-01)
      This work investigates and compares the potential of adaptive feed forward and feedback methods for a hybrid active/passive radiation control using smart foam. The radiating structure is a vibrating plate mounted in a rigid ...
    • A broadband passive-active sound absorption system 

      Smith, Jerome P.; Johnson, Brody D.; Burdisso, Ricardo A. (Acoustical Society of America, 1999-11-01)
      In recent years, hybrid absorption systems have been implemented which achieve high sound absorption over a broad frequency range. This work is an experimental study of a broadband hybrid absorption system which is comprised ...
    • Computer-aided, interactive design routine for the prediction of sound levels in irregularly shaped factory spaces 

      Blanding, James M.; Mitchell, Larry D.; Hurst, Charles J. (Acoustical Society of America, 1977)
      An interactive computer algorithm is presented which utilizes modified room acoustics theory to predict dBA sound pressure levels in regularly- and irregularly-shaped factory spaces. Irregularly positioned and nonuniform ...
    • A new hybrid passive/active noise absorption system 

      Beyene, Samson; Burdisso, Ricardo A. (Acoustical Society of America, 1997-03-01)
      A new hybrid passive/active system is developed for sound absorption over a wide frequency range. The system is comprised of a layer of absorbing material positioned at a distance from an active wall, leaving an air space. ...
    • Prediction of sound pressure levels in irregularly shaped factory spaces 

      Zinskie, John H.; Mitchell, Larry D.; Hurst, Charles J. (Acoustical Society of America, 1976)
      The prediction of sound pressure levels in irregularly shaped factory spaces is approached through an analysis of acoustically coupled rooms. Previous work has indicated that room surface sound absorption characteristics ...
    • Smart foam for applications in passive-active radiation control 

      Gentry, C. A.; Guigou, Catherine; Fuller, Chris R. (Acoustical Society of America, 1997-04-01)
      The development of a smart foam for passive-active noise control is discussed. The smart foam consists of cylindrically curved sections of PVDF film embedded in partially reticulated polyurethane acoustic foam forming a ...