Acoustic Holography with a Concentric Rigid and Open Spherical Microphone Array

Abstract

We present a new method and performance data related to volumetric acoustic intensity imaging using a spherical microphone array (SMA) that consists of a dual, concentric rigid and open SMA. The dual, concentric array was designed to improve the frequency range of a standard SMA. We apply standard techniques associated with interior spherical near-field acoustic holography (NAH) and, in particular, consider issues related to the optimal use of information from both arrays for NAH projection and the advantages that thereby accrue from utilizing a dual, concentric SMA.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2010
Accession Number
ADA552454

Entities

People

  • Abhaya Parthy
  • Andre van Schaik
  • Craig Jin

Organizations

  • University of Sydney

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Acoustic Absorption
  • Acoustic Holography
  • Acoustics
  • Anechoic Chambers
  • Coefficients
  • Computers
  • Coordinate Systems
  • Free Field
  • Frequency
  • Geometry
  • Intensity
  • Measurement
  • Microphones
  • Pressure Measurement
  • Sound Pressure
  • Standards

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Life Cycle Cost Analysis
  • Robotics and Automation.