Supersonic aircraft are designed to travel faster than the speed of sound, which is approximately 1,125 feet per second (or 343 meters per second) at sea level. These aircraft can reach speeds of Mach 1 and above, allowing them to significantly reduce travel time. The most famous example of a supersonic passenger aircraft is the Concorde, which operated from 1976 to 2003. Supersonic flight creates a sonic boom, a loud noise caused by shock waves when the aircraft breaks the sound barrier. This phenomenon has led to restrictions on supersonic flights over land in many countries, as the noise can be disruptive. However, advancements in technology are being explored to develop quieter supersonic aircraft for future commercial use.