Hearing Protection for High-Noise Environments. Part 2: Finite Element Modeling

Abstract

Report developed under STTR contract for topic AF06-T035. The objective of our effort was to develop powerful software tools and to perform high fidelity simulation which would allow identification and understanding of relevant bio-acoustic and psycho-acoustic mechanisms responsible for the transmission of acoustic energy through non-airborne pathways to the cochlea. As the main achievements of our Phase I work we consider: (1) development of a set of algorithms (including non-lossy, error-controlled matrix compression techniques) for general, i.e., variable-density, volumetric equations of acoustics, and (2) development of a solution technique overcoming ill-conditioning difficulties arising in large density contrast problems.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 2007
Accession Number
ADA471904

Entities

People

  • Elizabeth Bleszynski
  • Marek Bleszynski
  • Thomas Jaroszewicz

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Acoustic Waves
  • Acoustics
  • Computational Science
  • Computations
  • Contracts
  • Data Sets
  • Ear
  • Elastic Properties
  • Equations
  • Hearing Protection
  • Instructions
  • Plane Waves
  • Pressure Distribution
  • Standards
  • Three Dimensional
  • Waves

Readers

  • Acoustical Oceanography.
  • Auditory Neuroscience/Auditory Physiology.
  • Computational Fluid Dynamics (CFD)