The strength or intensity of the electromagnetic field produced by a PEMF device, measured in Gauss (G) or Tesla (T). Amplitude is distinct from frequency: it describes how powerful each pulse is, not how often pulses occur. A higher amplitude keeps the field above a usable level farther from the coil, which is greater reach rather than the field forcing its way through tissue. In high-intensity PEMF devices, amplitudes typically run from around 1,000 Gauss up to roughly 1 to 2 Tesla (10,000 to 20,000 Gauss) at the extreme.
A real field pulse over time. The height of the pulse is its amplitude, how strong the field gets, separate from how often the pulse repeats. After the pulse the coil rings, a fast shrinking oscillation at the coil's natural frequency; the time from one ring peak to the next is one cycle of that ring frequency. A coil driven at its natural frequency takes up energy most efficiently, which is resonance.
