Animation of the creation of a sine function from the definition of the sine as a ratio between sides of a right triangle.

This animation shows one of the elemental resonators in motion, the tuning fork. The tuning fork represents the simplest torsional resonators.

This is an animation of one of the elemental resonators, the LRC circuit.

Animation of one of the elemental resonators, the pendulum.

This animation shows both positive and negative going traveling waves together forming a partial standing wave. Attenuation of the waves complicate the wave pattern.