When it comes to therapeutic PEMF devices, the “F” stands for Field
Frequency is a parameter, or property of PEMF. It is by definition a measure of the rate of occurrence within a specific time period (as in heartbeats per minute or, pulses per second) Example: “ Extremely low frequency pulsed electromagnetic field designed for antinociception does not affect microvascular responsiveness to the vasodilator acetylcholine.”
Wavelength is another parameter or property of PEMF and directly corresponds to the frequency.