Brass players practice "lip slurs", which are unarticulated changes in embouchure between partials. It is only against an unarticulated background that representations can make sense to us. The unarticulated rear facade is of plain brick. Through this device he claimed to hear an unarticulated human voice. They were unarticulated and made of a single piece of bisque. With unarticulated wheels, climbing obstacles will cause the body of a vehicle to tilt.