Accession Number:

ADA574401

Title:

Numerical Simulation of Acoustic Wave Propagation to Assess Noise-Induced Damage to Human Hearing

Descriptive Note:

Final rept. 15 Feb 2006-30 Nov 2008

Corporate Author:

MONOPOLE RESEARCH THOUSAND OAKS CA

Report Date:

2009-07-19

Pagination or Media Count:

17.0

Abstract:

The objective of the effort was to develop mathematical algorithms and corresponding efficient numerical simulation tools for modeling propagation of acoustic waves through the human head, and, subsequently, to apply these tools to simulate energy transfer to the inner ear, and to assess the noise induced damage to the human hearing system. The unique achievementsdevelopments pertaining to this effort are i adaptation of non-lossy, error controlled Fast Fourier Transform Adaptive Integral Method compression technique to the problems of acoustics, ii development of fast integral equation formulation for solving high-contrast problems e.g. biological tissues embedded in air, iii parallel, distributed memory implementation of the developed algorithms with near perfect scalability, iv initiation of the extension of the developed approach to a full elasto-acoustic problem In summary, the developed fast, parallel, volumetric integral equation based solver is capable of accurate large-scale numerical simulations involving anatomically realistic models of a human head discretized with several million tetrahedral elements and characterized by complex geometrical details and large density contrasts.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE