Authors' Homepages:   Anthony Bedford  
Wallace Fowler  
Chapter 21: Vibrations
"Vibrations have been of concern in engineering since the beginning of the industrial revolution.
Beginning with the development of electromechanical devices capable of creating and measuring
mechanical vibrations, engineering applications of vibrations have included the various areas of
acoustics, from architectural acoustics to earthquake detection and analysis. We consider vibrating
systems that have one degree of freedom - that is, the position, or configuration, of a system can be
specified by a single variable. The fundamental concepts we introduce, including amplitude, frequency,
period, damping, and resonance, are also used in the analysis of systems with multiple degrees of
freedom."