During actual sound waves, what is being spread apart from us to hear sound?

The sound is being spread out into vibrations which are silent. so the noise goes down the ear canal and hit the eardrum and clusters the sound together to allow an actual sound.

good looking response

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.