Accession Number:

ADA574400

Title:

Evaluation of Acoustic Propagation Paths into the Human Head

Descriptive Note:

Final rept. Dec 2005-Nov 2008

Corporate Author:

ILLINOIS UNIV AT URBANA BOARD OF TRUSTEES

Personal Author(s):

Report Date:

2009-02-24

Pagination or Media Count:

43.0

Abstract:

In summary, the highly interdisciplinary program has addressed successfully the challenging technical goals set forth to develop and validate an acoustic wave propagation model using well understood and documented computational techniques that track an air-borne incident acoustic wave propagated around, into and in the human head. A finite element model was formulated for simulating the acoustic wave propagation concentric spheres. This model was verified against the closed form solution of the plane wave propagation into concentric fluid spheres. A ray tracing method was developed and verified to visualic the acoustic wave propagation pathways from a scalar pressure field. Finally, the occlusion effect provides a relatively robust phenomenon to compare the computational findings with the behavioral and functional findings the occlusion effect contour or difference score between the open and occluded ear show a similar trend between the computational findings and the behavioral and functional findings In conclusion, the computational approach, utilizing fluid elements, provides very good agreement m ith human subject findings.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE