This is an overview of the use of ultrasonic methods to study properties of both magnetic materials and non-magnetic metals. Much of the work in this area was done in the former Soviet Union and is not widely known in the West. The authors discuss not only the experimental techniques for using polarization effects with ultrasonic measurements, but also the theoretical basis for interpreting the data. Such experiments yield information not only about the vibrational spectra of the material over a wide range of frequencies, but also about electromagnetic properties. The book should interest...