Category: 6. Aircraft and Airport Transportation Noise Sources and Control

One of the major environmental noise problems throughout the world is the noise associated with civil aircraft operations nearby airports. In the US, the Federal Aviation Administration (FAA) recognizes that airport noise issues can be highly technical and complex. The European Union (EU) has also recognized the problem and noise emission limitations from civil aircraft have been in force…

15.5.1 Passive Noise and Vibration Control Low interior cabin noise is important for passenger and crew comfort [13]. High cabin noise levels experienced in passenger jet aircraft in the 1960s and 1970s have now been considerably reduced by the use of turbofan engines instead of noisy pure jet engines. Obtaining satisfactory cabin noise environments, which…

The generation of helicopter rotor noise is very complicated [11]. Sources of helicopter noise include (i) main rotor, (ii) tail rotor, (iii) the engines, and (iv) the drive train components. The dominant noise contributors are the main rotor and the tail rotor. Engine noise is normally less important, although for large helicopters engine noise can be…

As described in Ref, propellers are used on small general aviation aircraft as well as small to medium‐sized passenger airliners (See Figure 15.2). In small general aviation aircraft, propellers operate with a fixed‐blade pitch. In larger general aviation and commuter aircraft, they operate with adjustable pitch to improve aircraft take‐off and flight performance. Smaller aircraft have…

The introduction of commercial passenger jet aircraft in the 1950s brought increasing complaints from people living near airports. Not only were the jet engines noisier than corresponding piston engines on airliners, since they were more powerful, but the noise was more disturbing because it had a higher frequency content than piston engines. This was most…

The number of aircraft used for civilian and military air transportation has increased steadily during the last decades. Thus, aircraft noise has been a problem for people living in the vicinity of airports for many years. In the case of aircraft and helicopters, similar power plant and motion‐related noise sources as in surface transportation vehicles…