Mach 2
Another term for unwanted sound is noise.
supersonic
supersonic
When an aircraft travels at the speed of sound, it is said to be travelling at Mach 1.
it is resoning
The simple answer is "Faster than the speed of sound"
sound barrier
sound barrier
Sound Barrier
sound barrier
By definition, Mach 1 is the speed of sound. Most of the time it is used to refer to the speed of sound in air, but it can be used to refer to the speed of sound in any fluid. Mach numbers are multiples of this speed, so Mach 0.5 is half the speed of sound while Mach 2.5 is two and half times the speed of sound. The term "transonic" refers to a condition where the speed crosses over the speed of sound - so it refers to a range of velocities of airflow exist surrounding and flowing past an air vehicle or an airfoil that are concurrently below, at, and above the speed of sound in the range of Mach 0.8 to 1.2. In this respect - at least some of the velocities must be below the speed of sound, some at the speed of sound and some faster. The correct term for speeds that are exclusively faster than Mach 1 is supersonic.
sound barrier