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Unformatted text preview: Octave band centre (Hz) 125 250 500 1000 2000 4000 Sound pressure level 86 85 84 83 82 80 1. What Noise Criterion (NC) would be appropriate for the conference room (receiving room)? 2. What is the Noise Reduction (NR) in the conference room (receiving room)? 3. Determine the required TL at each octave band frequency center. Assume the following for calculating the Transmission Loss (TL): The wall between the units is 12ft tall and 16ft long and the receiving room is finished with ½" gypsum board on wood studs (16"o c) for the walls and ceiling. The floor is heavy carpet on a foam pad. The source room has walls that are 12ft high x 16ft long (256 square feet in plan). Figure 1: Plan showing adjacent rooms 4. From the figure below, name three categories of noise sources/types. 5. Provide a noise control solution for each of these acoustical problems. Figure 2: Sources of noise...
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This note was uploaded on 08/27/2011 for the course ARC 4620 taught by Professor Staff during the Fall '08 term at University of Florida.
- Fall '08