To test this, we dropped a ball into a tub of water and observed which occurred or arrived first - sound or the surface wave. What we were really investigating was are there more waves than a surface wave.
Since the second ball wiggles when the surface waves hit it, and a stethoscope picks up sound, this simple test explores the possibility that the surface wave and the sound wave may be similar, but are they the same wave? If they are, they should arrive at the stethoscope at the same time. If they are not, then they should arrive at different times.