{HEAD ~ One or more sonic speakers} disposed below or coincident to the fluid based center generate {TAIL ~ fluid sound waves} 
generate
{ HEAD ~ One or more sonic speakers } disposed below or coincident to the fluid based center generate { TAIL ~ fluid sound waves }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL