Noise control problems of passenger airplanes (A review)

The consequences of the introduction of new international standards and regulations that impose limitations on the community noise of passenger airplanes and restrict the operation of noisy airplanes are analyzed. The need in developing new methods for reducing the aircraft noise is stated. The main noise sources inherent in passenger airplanes of different types are considered. The ways of increasing the efficiency of noise-suppressing systems used in power plants and the ways of reducing the intensity of airplane noise sources are determined. The methods for reducing the noise both inside and outside an airplane are described.