Ultrasonics, 3rd Edition

Preface to the Third Edition

There have been significant advances in the science and technology employed in commercial systems and in both the scope and the range of applications of ultrasound since the second edition of this book was published in January 1988. The present edition includes discussion of many of these advances and improvements; additional figures and numerous new references are provided. In 1988, it became a requirement to write technical papers using the international system of units (abbreviated as “SI” from the French Systeme International d’unites) rather than British units. All the parameters reported are now completely described using SI units: Meters have replaced feet, velocity is now expressed in kilometers per second, ...