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Performance of an underwater acoustic volume array using time-reversal focusing
Joseph A Root1, Peter H Rogers
1G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332, USA.
The Journal of the Acoustical Society of America
|November 15, 2002
Summary
Time reversal acoustic focusing with a volume array effectively concentrates sound in challenging underwater environments. This method shows promise for applications like sonar and underwater communication, outperforming standard focusing techniques.
Area of Science:
- Underwater acoustics
- Array signal processing
Background:
- Time reversal enables acoustic focusing in complex environments.
- Volumetric arrays offer advantages in space-constrained applications like submarines.
Purpose of the Study:
- Investigate time-reversal focusing using an underwater acoustic volume array.
- Evaluate focusing performance in various scattering conditions.
Main Methods:
- Utilized a 27-element, 3x3x3 cubic volume array with 18.75-cm spacing.
- Employed second-derivative Gaussian pulses for focusing at 30 cm.
- Compared time-reversal focusing against standard focusing methods.
Main Results:
- Demonstrated effective acoustic focusing using the volume array.
- Evaluated the array's capability to suppress back lobes.
- Analyzed the impact of scattering environments on focal region size.
Conclusions:
- Time reversal is effective for acoustic focusing with volume arrays in scattering media.
- Volume arrays show potential for underwater applications such as sonar and imaging.
