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Yang Song¹, Kainam Thomas Wong

¹Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Hung Hom Kowloon KLN, Hong Kong.

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|April 6, 2013

Summary

A novel spatially distributed acoustic vector-sensor relaxes collocation constraints for improved direction-finding accuracy. This innovation enhances acoustic wavefield analysis and emitter localization by orders of magnitude.

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Area of Science:

Acoustics
Signal Processing
Sensor Technology

Background:

Acoustic vector-sensors use orthogonally oriented particle-velocity and pressure sensors for direction-of-arrival estimation.
Traditional vector-sensors require precise spatial collocation of all components in a point-like geometry.
This collocation requirement limits practical applications and achievable accuracy.

Purpose of the Study:

To propose a spatially distributed acoustic vector-sensor design.
To relax the strict spatial-collocation constraint of traditional acoustic vector-sensors.
To enhance direction-finding accuracy and extend spatial aperture.

Main Methods:

Development of a theoretical framework for a spatially distributed acoustic vector-sensor.
Relaxation of the spatial-collocation requirement for component sensors.
Leveraging algorithmic advantages of self-normalization for direction-of-arrival estimation.

Main Results:

Demonstration of a spatially distributed acoustic vector-sensor concept.
Preservation of the self-normalization direction-of-arrival estimation algorithm's benefits.
Significant extension of the spatial aperture leading to orders-of-magnitude improvement in direction-finding accuracy.

Conclusions:

The proposed spatially distributed acoustic vector-sensor overcomes the limitations of traditional collocated designs.
This approach offers superior direction-finding performance by increasing the effective spatial aperture.
The technology holds promise for advanced acoustic wavefield analysis and emitter localization.