ELECTRONIC FILE CHARACTERISTICS: 395 files; Adobe Acrobat (.PDF), video files (.MPG,.AVI), graphics (.GIF) and HTML. PHYSICAL DESCRIPTION: 1 CD-ROM; 4 3/4 in.; 252 MB. ABSTRACT: This report describes research performed over the period 31 July 1996 to 31 December 2002 on a MURI under Office of Naval Research contract N00014-96-1-1173 on the topic "Acoustic Transduction - Materials and Devices". This program brings together researchers from the Materials Research Laboratory (MRL, present Materials Research Institute, MRI), the Applied Research Laboratory (ARL) and the Center for Acoustics and Vibrations (CAV) at the Pennsylvania State University. As has become customary over many years, research on the program is detailed in the technical appendices of published work, and only a brief narrative description connecting these studies is given in the text. The program combines a far reaching exploration of the basic phenomena contributing to piezoelectric and electrostrictive response with the highly applied thrusts necessary to produce the pay-off in new applications relevant to Navy needs. Polarization vector tilting in the ferroelectric phase of perovskite structure crystals at compositions close to a morphotropic phase boundary (MPB) was first underscored on this program some five years ago, and is now widely accepted as one mode for exploiting the large intrinsic spontaneous strain in the ferroelectric to produce exceedingly strong anhysteritic piezoelectric response and very large electric field controlled elastic strain. New evidence for the importance of both spontaneous (monoclinic) and electric field induced tilting on the properties of both single (lead zinc niobate-lead titanate) and polycrystal (PZT) MPB systems was presented in this program. Loss mechanisms in piezoelectrics have been intensively investigated, aiming at development of high power materials. A new concept, intensive (measurable) and extensive (material's intrinsic) losses of dielectric, elasti.