Abstract
The purpose of this paper is to describe our progress in development and applications of numerical simulation tools designed to (a) investigate mechanisms of energy transfer to cochlea through air‐ and bone‐conduction pathways and to (b) assess effectiveness of suitable noise protection devices. Our numerical simulations employ a recently implemented acoustoelastic integral equation solver, capable (through the use of nonlossy fast Fourier transform based matrix compression algorithm and parallelization on distributed‐memory systems) of accurate large‐scale numerical simulations with anatomically realistic models of the human head, discretized with several millions of tetrahedral elements. Recently added new solver features (including treatment of shear waves, described in terms of node‐based linear elements) enable us to analyze detailed aspects of acoustic/elastic wave interaction with the human head with significant accuracy and efficiency. In particular, they facilitate examination of the relative amounts of energy transferred to the middle and inner ears directly through the outer ear and indirectly via excitation of elastic waves in the skull and soft tissues. [This work is supported by AFOSR.]
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