Spatial resolution of Acoustic Phase Conjugation

LI Sheng

Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (10) : 28-30.

PDF(879 KB)
PDF(879 KB)
Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (10) : 28-30.
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Spatial resolution of Acoustic Phase Conjugation

  • LI Sheng
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Abstract

T
Phase conjugation (PC) arrays could be used to build the image of a noise source. The discrete plane and spherical surface arrays are used to study the spatial resolution of acoustic phase conjugation. The spatial resolutions of various PC arrays with different distances between array and source are studied numerically. The effect of an acoustic sink on the spatial resolution is discussed. The numerical simulation shows that only the dipole array at near field produces a focal volume much smaller than half a wavelength. The field magnitude and the resolution generated by the plane arrays decrease with increasing distance between the source and the array. The field magnitude and the resolution generated by the closed spherical surface arrays do not change with the radius of the arrays. The arrays with an acoustic sink produce a subwavelength focusing wave even not at the near field

Key words

Phase conjugation / source localization / spatial resolution / acoustic sink

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LI Sheng. Spatial resolution of Acoustic Phase Conjugation [J]. Journal of Vibration and Shock, 2010, 29(10): 28-30
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