Abstract: Ultrasound puts materials to the test

Abstract:
Ultrasound puts materials to the test
Many industries use ultrasound to find defects in materials, and a new technique that seems to make time go backwards could make ultrasonic imaging more accurate and reliable Mathias Fink *

TABLE OF CONTENTS

Introduction
Defects and echoes
Ways to improve focusing
Ways to reverse time
Waves on the surface
Further reading

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