Noise Considerations in the Design and Operation of the Supersonic Transport Free

The main sources of noise for the supersonic transport are noted to be power plants, aerodynamic boundary layers, and shock waves. Discussions are given on the state of knowledge of these noise environments and the manner in which noise considerations may affect the design and operation of this type of aircraft. Engine noise problems related to aircraft structural damage, exposure of ground crews, and reactions of communities near airports are discussed for various proposed power plants including the turbofan. Boundary layer noise considerations include possible fatigue damage to external skin surfaces at high dynamic pressures as well as the internal noise environments which may affect voice communications and passenger and crew comfort. Sonic boom considerations include the generation and propagation as well as the associated effects on structures, equipment, and personnel. Special attention will be devoted to discussions of operating procedures useful for minimizing sonic boom disturbances on the ground.