Sonic is the speed of sound.
Sound is a physical vibration.
When it is converted to an electro-magnetic wave it becomes a radio wave.
Radio waves are the lowest vibration on the electro-magnetic spectrum.
They have the slowest frequency & the longest wavelength.
I talk at the speed of my thinking.
My thinking is sub-sonic yet my words travel at sonic speed.
I think, write & read at speeds lower that the speed of sound.
At sub-sonic speeds, my brain is able to process individual frequencies off sound as distinct words.
Super-conscious thoughts travel at super-sonic speeds.
Inspired, illuminating thoughts travel at the speed of light.
They appear instantly in my conscious mind.
Super-sonic thought is an electro-magnetic wave.
Sub-sonic thinking is a process of my brain.
My super-conscious mind is light speeds faster than my sub-sonic sub-conscious mind.