Ultrasonics, 3rd Edition

6    Determining Properties of Materials

6.1      INTRODUCTION

In the previous chapters, it was shown that many factors influence the propagation characteristics of ultrasonic waves. In this and succeeding chapters (through Chapter 10), methods of measuring and evaluating propagation characteristics are presented, demonstrating many varied and practical low-intensity applications of ultrasonic energy. Low-intensity applications are those where the primary purpose is to transmit the energy through a medium and measure a property or parameter, based on analysis of the response. The objective is never to change the state of the medium; that is, the energy level is so low that the medium remains unchanged from its original state after the wave ...