Fundamentals of Sound contains several figures that attempt to show how something, such as a longitudinal wave, changes in time, by a series of figures, each changed slightly from the previous. Examples are Figures 1-1 and 1-2. It is easier to see what is going on in time by watching the real thing, or at least a simulation of it. Such simulations, called animations, are what we present here. To see an animation associated with a figure in the book, click on the figure number below.
1-1. Transverse wave motion.
Figure 2-2. Formation of a standing wave.
A movie of the Tacoma Narrows bridge oscillations caused by resonance is available here. The bridge's vibration modes were excited by a strong wind. The bridge collapsed soon after the events shown here.
Figure 7-15. Motion of a square wave.
Figure 10-6. Longitudinal pulse on a chain of masses and springs.
Figure 12-10. Traveling wave on the basilar membrane.
Animations can be found on many other sites. Some of the most useful are the following:
motion in a transverse traveling wave