Table 2.

Scaling laws for reported peak SPL and rTMS sound level.

Effect	Change in peak SPL	Change in rTMS sound level
Stimulation strength	$12\text{dB}\cdot {\log }_2\frac{\text{Stim}.\text{strength}[\%\text{RMT}]}{100\%}$	$12\text{dB}\cdot {\log }_2\frac{\text{Stim}.\text{strength}\left[\%\text{RMT}\right]}{100\%}$
Repetition rate	0	$3\text{dB}\cdot {\log }_2\frac{\text{Rate}[\text{Hz}]}{20\text{Hz}}$
Distance from coila	$-6\text{dB}\cdot {\log }_2\frac{\text{Distance}[\text{cm}]}{25\text{cm}}$	$-6\text{dB}\cdot {\log }_2\frac{\text{Distance}[\text{cm}]}{25\text{cm}}$

^aValid down to distance of 5 cm [14].