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