Have you ever walked down a sidewalk and the sidewalk seems to make a little jump, which would not be much good for anything unless you were a male youth with a BMX Bicycle or were just kicked out of the shopping mall on your skateboard for doing tricks? Most of us have and we know that the roots of the trees have uprooted the sidewalk. Recently some studies have been done which used directional acoustics to train root growth. No the application was not to protect sidewalks or protect the foundation of anyone