amplitude

But, if we 15:56 use a longer duration stimuli, we see 15:59 that longer duration stimuli elicit a 16:01 greater number of action potentials with 16:04 each action potential having the same 16:06 all or nothing amplitude.

Intro to Neuroscience

This is an ordinary differential equation, and the solution is a sinusoidal function. t is time, Phi is the phase angle and A is the amplitude of vibration.

Understanding Vibration and Resonance

And then we can differentiate the equation for x to calculate the amplitude of vibration A.

Understanding Vibration and Resonance

This happens because when the natural frequency and forcing frequency are the same, the energy added to the system by the external force is timed just right so that it increases the amplitude of the displacement with each cycle.

Understanding Vibration and Resonance