Mach number a small area around the object's leading edge. (Fig.1b) Fig. 1. "Mach number in transonic airflow around an airfoil; M < 1 (a) and M > 1 (b)." When an aircraft exceeds Mach 1 (i.e. the sound barrier), a large pressure difference is created just in front of the aircraft. This abrupt pressure difference, called a shock wave, spreads backward and outward from the aircraft in a cone shape (a so-called Mach cone). It is this shock wave that causes the sonic boom heard as a fast moving aircraft travels overhead. A person inside the aircraft will not hear this.
Mach and Daddy artists in this genre. "Daily" and "Unforgettable" were the label's first releases. Mach and Daddy Peter "Mach" Machore and Martin "Daddy" Machore, better known as Mach and Daddy, are Panamanian duo brothers of Spanish reggae and reggaeton. The first single for which they were recognized, "La Botella" (""The Bottle""), charted throughout Latin America and hit #1 on the "Billboard" chart. Other popular singles included "La Juma" and "El Que Se Fue Pa Barranquilla". The duo's concerts attracted as many as fifty thousand people. They tour and perform throughout Latin America and the U.S. Peter Machore is "Mach" and Martin Machore