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Acoustic source localization in anisotropic plates.

Tribikram Kundu1, Hayato Nakatani, Nobuo Takeda

  • 1Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, AZ 85721, USA. tkundu@email.arizona.edu

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Summary

A new acoustic source localization technique uses only six sensors for anisotropic plates, eliminating the need for known velocity profiles. This method also works for isotropic plates, reducing sensor count to four.

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Area of Science:

  • Acoustics
  • Materials Science
  • Mechanical Engineering

Background:

  • Conventional acoustic source localization fails in anisotropic plates due to direction-dependent wave speeds.
  • Existing methods require detailed velocity profiles or numerous sensors, limiting practical application.

Purpose of the Study:

  • To develop a novel acoustic source localization technique for anisotropic plates.
  • To reduce the number of sensors required for accurate source identification.
  • To eliminate the need for pre-determined velocity profiles.

Main Methods:

  • Acoustic signal analysis using a minimal sensor array.
  • Development of a new localization algorithm tailored for anisotropic materials.
  • Experimental validation on both isotropic and anisotropic plate structures.

Main Results:

  • Successfully located acoustic sources in large anisotropic plates using only six sensors.
  • Demonstrated the technique's efficacy without prior knowledge of direction-dependent velocity profiles.
  • Achieved accurate localization for both isotropic and anisotropic materials, with fewer sensors for isotropic cases (four sensors).

Conclusions:

  • The proposed technique offers a significant advancement in acoustic source localization for anisotropic structures.
  • It provides a practical and efficient solution, reducing hardware and data requirements.
  • The method's versatility extends to isotropic materials, enhancing its applicability across different structural types.