Browse Items (2 total)

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  "Noise reduction study in a scaled model acoustic test facility."

  The acoustic properties of five insulation materials were investigated in a 1/10- scale model acoustic facility. The materials were designed for applications in space vehicles. The model facility, consisting of a reverberation chamber coupled to an anechoic chamber, was evaluated for its use in noise reduction testing. It was found that a reasonably diffuse sound field existed above 900 Hertz. Modal density graphs of the reverberation chamber and spatial acoustic gradients measured within the chamber and across the test panel opening are compared to an idealized facility.; Prepared for the 75th Meeting of the Acoustical Society of America,Ottawa, Ontario, Canada. May 21 - 24, 1968.
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  "Ground testing at MSFC : research achievements review series no 9"

  In 1955, the team which has become the Marshall Space Flight Center (MSFC) began to organize a research program within its various laboratories and offices. The purpose of the program was two-fold: first, to support existing development projects by research studies and second, to prepare future development projects by advancing the state of the art of rockets and space flight. Funding for this program came from the Army, Air Force, and Advanced Research Projects Agency. The effort during the first year was modest and involved relatively few tasks. The communication of results was, therefore, comparatively easy.; Pages of handwritten notes on yellow legal paper. There is also a 3 x 5 inch card with this information. Article reference for Saturn History Files: Schuler, Albert E. (NASA-MSFC) Research and development in instrumentation for static testing.