Angular Spectrum Filtering of Parasitic Images Introduced by the Spatial Sampling of Acoustical Images

  • C. Bruneel
  • B. Delannoy
  • R. Torguet
  • E. Bridoux
  • J. M. Rouvaen
Part of the Acoustical Imaging book series (ACIM, volume 8)

Abstract

The power level of the acoustic echoes used in acoustical imaging systems is very low. The signal processing is therefore eased by sampling the reflected acoustic field with a receiving piezoelectric transducer array before subsequent amplification. This spatial sampling introduces parasitic images. By filtering the most inclined part of the angular spectrum, the power level of these ghosts may be severely reduced. A parallel is drawn between the present case and the situation arising in grating optics and the results of this analysis are well supported by the experimental findings.

Keywords

Convolution Ghost Acoustics Sonar 

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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • C. Bruneel
    • 1
  • B. Delannoy
    • 1
  • R. Torguet
    • 1
  • E. Bridoux
    • 1
  • J. M. Rouvaen
    • 1
  1. 1.Centre Universitaire de ValenciennesValenciennes CédexFrance

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