there is Teslas patent released to public domain that could be potentially be combined directly to bifilar coil.

active noise control.. anc emp lfo scalar cymatics.. i recommend 30-40hz, there is evidence that even 50 hz can be dangerous, i am still learning about the details.

have ideas in my secret hideout on steemit, put these sonically invisible medical devices near 5G & hack the matrix with real analog.. 40 hz is gamma brain waves, responsible for deepest levels of meditation & advanced levels of awareness.