Variance of Energy & Confidence Intervals in SEA: Numerical and Experimental Validation

This paper has shows the extension of a new energy variance formulation3 to the prediction of the variance of the energy density at a point within a built-up system. Numerical and experimental benchmark studies were performed in the paper, with the aim of validating both the original theory and the new developments. In all cases the theory has been found to capture the qualitative trends of the benchmark results, with very good quantitative agreement. For the experimental data, it was found that the deviation from the predicted results may be due in part to the limited number of samples in the experimental Monte Carlo ensemble. The range of problems addressed in this paper covers the variance prediction of both total energy and energy density responses, either at a pure-tone or averaged over frequency bands. It should be emphasized that present theory is based on Statistical Energy Analysis (SEA). The method therefore shares the advantages and disadvantages of SEA: the main advantage is that the method is efficient and easy to apply. The main disadvantage is that the conditions required for the successful application of SEA must be met.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos; References;
  • Pagination: pp 324-332
  • Monograph Title: Noise-Con 04. The 2004 National Conference on Noise Control Engineering

Subject/Index Terms

Filing Info

  • Accession Number: 01054206
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 16 2007 5:55PM