Figure 2.

Schematic overview of the terms used for characterizing bursts and pulses of ELF-PEMF. PEMF-signals use periodically repeated bursts consisting of a certain number of pulses, $N,$ at a certain frequency, $\mathrm{f}$. The pulses can be described by their shape, amplitude, and pulse width, $\Delta {\mathrm{t}}_{\mathrm{p}}$. Here, bursts are repeated at the burst-frequency ${\mathrm{f}}_{\mathrm{b}}\ll \mathrm{f}$. Some publications refer to the magnetic flux density, $\mathrm{B},$ or the time-derivative of the magnetic field, dB/dt, others only state the search coil induction voltage. However, without knowing the exact search coil dimensions, the magnetic field amplitude cannot be derived from this value.