A Computational Model for Sound Field Absorption by Acoustic Arrays (revision 6)

Abstract

In this paper, the authors discuss the sound absorption property of arrays of micro-acoustic actuators at a control surface. They use the wave equation over the half plane for the velocity potential with a boundary dissipation by a proportional pressure feedback law along the half plane boundary. The feedback gain over the array is described by a distributed shape function. They develop a computational method based on the Fourier transform and employ it to analyze and evaluate the decay rate of acoustic energy. Specifically, they carry out computations for a diffusive random initial field and report on the resulting numerical findings.

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Document Details

Document Type
Technical Report
Publication Date
Jul 24, 2001
Accession Number
ADA454357

Entities

People

  • D. G. Cole
  • G. A. Pinter
  • H. Thomas Banks
  • K. M. Furati
  • Kazufumi Ito

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Acoustic Arrays
  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Angle Of Incidence
  • Arrays
  • Boundaries
  • Computational Science
  • Eigenvalues
  • Energy
  • Equations
  • Frequency
  • Frequency Domain
  • Materials
  • Pressure Measurement
  • Waves

Readers

  • Acoustical Oceanography.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Robotics and Automation.