Introduction General Remarks on Wood Material Outline of the Book References PART I. ENVIRONMENTAL ACOUSTICS Acoustics of Forests and Acoustic Quality Control of Some Forest Products Acoustics of Forests and Forest Products Ultrasound for the Germinability Detection of Acorns References Wood and Wood-Based Materials in Architectural Acoustics Influence of Anatomic Structure of Wood on Sound Absorption Characteristics Wood Materials as Acoustic Insulators Wood and the Acoustics of Concert Halls References PART II. MATERIAL CHARACTERIZATION Theory and Experimental Methods for the Acoustic Characterization of Wood Elastic Symmetry of Propagation Media Wave Propagation in Anisotropic Media Velocity of Ultrasonic Waves in Wood Attenuation of Ultrasonic Waves Internal Friction in Wood in the Audible Frequency Range References Elastic Constants of Wood Material Global Characterization Local Characterization References Structural Anisotropy and Ultrasonic Parameters of Wood Filtering Action Induced by the Anatomic Structure of Wood Estimation of Anisotropy by Velocities of Longitudinal and Transverse Bulk Waves Estimation of Anisotropy by Invariants References PART III. QUALITY ASSESSMENT Wood Species for Musical Instruments Acoustic Properties of Wood Species Factors Affecting Acoustic Properties of Wood for Musical Instruments Chemical Treatments for Improving the Acoustic Properties of Common Solid Wood Used for Mass-Produced Instruments Composites as Substitutes for Resonance Wood Appendix References Ultrasound as a Complementary Nondestructive Tool for Wood Quality Assessment Ultrasound and Wood Quality Ultrasonic Methods for Trees, Timber, and Wood Composites Other Nondestructive Techniques for the Detection of Defects in Wood References Environmental Modifiers of the Structural Parameters of Wood Detected with Ultrasonic Waves Dependence of Ultrasonic Velocities and Related Mechanical Parameters of Wood on Moisture Content and Temperature Ultrasonic Parameters and Biological Deterioration References Acoustic Emission Principles and Instrumentation Acoustic Emission for the Structural Evaluation of Trees, Solid Wood, Particleboard, and Other Wood-Based Composites Acoustic Emission for Monitoring Technological Processes References High-Energy Ultrasonic Treatment for Wood Processing Modifications Induced in Anatomic Structure by High-Energy Ultrasonic Waves High-Energy Ultrasonic Treatment, A Tool for Wood Processing Improving Wood Preservation Using Ultrasound References Index.