Ashish Khemka
Ansys Employee

The sound (or sonic) barrier is a term historically used to address the impossibility for aircraft to fly faster than the speed of sound due to a sudden increase of drag due to transonic phenomena. Scientists discovered that the fuselage and the wing shape would affect the drag increase. This, also combined with more powerful engines, allowed humankind to achieve supersonic flights.

Nowadays, this term is still used to describe an aircraft flying supersonic (breaking the sound barrier).