Acoustical Holography, Softcover reprint of the original 1st ed. 1972
Volume 4 Proceedings of the Fourth International Symposium on Acoustical Holography, held in Santa Barbara, California, April 10-12, 1972

The latest progress in acoustical holography and related research areas, generally involving imaging by means of acoustic waves, was discussed and treated in depth at the Fourth International Symposium on Acoustical Holography, held in Santa Barbara, California on April 10-12, 1972. This volume contains the proceedings of that symposium. As the papers presented here indicate, a num­ ber of startling advances have been realized in the state-of-the-art since publication of Volume 3 of Acoustical Holography. Progress has been partic­ ularly impressive in the field of acoustical imag­ ing. The Fourth International Symposium represents something of alandmark conference in this respect. The scope of this volume is substantially broad­ er than the term "acoustical holography' usually implies and encompasses the whole area of visualiza­ tion, detection, and recording of sound fields whether with long wavelengths, microwaves, or with extrememly short sound wavelengths. The 37 sympo­ sium papers appear here each as aseparate chapter. In general, the work reported deals mainly with ex­ perimental and theoretical developments in the a­ bove areas. This work has significant practical potential use in terms of seismic sensing, under­ water imaging, non-destructive testing, real-time acoustic microscopy, and medical diagnosis.

I. Real-Time Imaging Systems.- Real-Time Acoustical Imaging by Means of Liquid Surface Holography.- A Progress Report on the Laser Scanned Acoustic Camera.- Real-Time Reconstruction of Images from Hydroacoustic Holograms.- II. High-Resolution Imaging Systems.- Practical High Resolution Acoustic Microscopy.- A 1.1 GHz Scanned Acoustic Microscope.- III. Systems for Bio-Medical Applications.- Considerations for Diagnostic Ultrasonic Imaging.- Multi-information Recording and Reproduction in the Ultrasono-Cardio-Tomography.- Bragg-Diffraction Imaging: A Potential Technique for Medical Diagnosis and Material Inspection.- Biomedical Studies Using Ultrasonic Holography.- Ultrasonic Stereoholography.- IV. Array-Imaging Techniques.- Foil-Electret Transducer Arrays for Real-Time Acoustical Holography.- A Small Scale Model for Seismic Imaging Systems.- Solid-State Acoustic Image Sensor.- Acoustical Imaging by Electrostatic Transducers.- Conventional and Weak Signal Enhancement Holography in the Presence of Measurement Errors.- Spiral Scanning in Longwave Holography.- V. Systems for Nondestructive Testing.- Graphic Display for Ultrasonic Nondestructive Testing.- Acoustical Reconstruction of Holograms, and Their Potential Use.- Cylindrical Scan Acoustical Holography.- VI. Experimental Systems for Underwater and Seismic Exploration.- An Experimental Focused Acoustic Imaging System.- An Experimental Holographic Acoustic Imaging System.- First-Arrival Seismic Holograms.- VII. Theory and Methods.- Analysis of Various Ultrasonic Holographic Imaging Methods for Medical Diagnosis.- Threshold Contrast for Various Acoustic Imaging Systems.- Influence of Quantization and of Other Nonlinear Distortions of the Holographic Signal.- The Effects of Scanning Position and Motion Errors on Hologram Resolution.- Spherical Aberration in Long Wavelength Holography.- Amplitude-Only and Phase-Only Holograms.- Spatial Filtering Considerations in Bragg-Diffraction Imaging.- Gain and Phase Variations in Holographic Acoustic Imaging Systems.- Acoustic Bragg Imaging with an Optical Point Source.- The Ultimate Sensitivity of Sokolov Image Converter Tubes.- A Comparison of Holographic Versus Lens Type Acoustic Image Systems by Computer Simulation.- Correction of Perceived First-Order Distortions in Holography.- Ultrasonic Holography in a Source- and Object-Movable System.- Acoustic Interference in Solids and Holographic Imaging.- Detection of Buried Geological Ore-Bodies by Reconstructed Wavefronts.- List of Participants.