Do These houses have the best acoustic quality?

http://associations.missouristate.edu/m ... sHouse.jpg http://www.simondale.net/house/ http://thatroundhouse.info/how.htm It is said that soil is one of the best insulation material... fiberglass is also made of sillica, which is in sand.. and soil is very good for eletrical grounding or earth... I am very curious about those houses' frequency response... no rectangular wall... wall ,floor, ceilling are made of soil

Acousically you'd think they'd great! I wonder what height you could get out of them. Sound proof???? that would depand on the weakest link- doors and windows. But if your building a home like that you probually don't have neighbours to worry about. either way I want one!