A two-step hybrid technique for accurately localizing acoustic source in anisotropic structures without knowing their...

Area of Science:

• Mechanical Engineering
• Acoustics
• Materials Science

Background:

• Acoustic source localization typically assumes straight-line wave propagation.
• This assumption fails in anisotropic plates or when inclusions/cavities are present.
• Existing methods like distributed sensors or time reversal are costly or complex.

Purpose of the Study:

• To propose a novel, efficient two-step hybrid technique for acoustic source localization in anisotropic plates.
• To overcome the limitations of the straight-line propagation assumption in complex plate structures.
• To reduce the computational and labor demands associated with current localization methods.

Main Methods:

• A two-step hybrid approach was developed for acoustic source prediction.
• Step 1: Initial localization assuming straight-line wave propagation.
• Step 2: Refinement of the initial prediction by solving an optimization problem.

Main Results:

• Experimental results validated the effectiveness of the two-step hybrid technique.
• The second step consistently improved the accuracy of the initial source location estimates.
• The method effectively reduced prediction errors in anisotropic plate scenarios.

Conclusions:

• The proposed two-step hybrid technique offers a more accurate and efficient solution for acoustic source localization in anisotropic plates.
• This method mitigates the inaccuracies arising from non-straight-line wave propagation.
• It provides a practical alternative to expensive distributed sensor systems or computationally intensive time reversal methods.