METHOD FOR REDUCING THE NOISE LEVEL OF AN AVIATION ENGINE AND SYSTEM FOR CARRYING OUT SAID METHOD

摘要

The inventive method for reducing the noise level of an aviation engine consists in receiving and converting a noise acoustic signal into an electric signal, transmitting the received signal to the place of the processing thereof, processing the electric signal in order to actively reduce the noise level, amplifying said signal, converting it into an acoustic signal and in emitting it to a point of space where the acoustic signals are received. The electric signals used for the active noise reduction are formed in a low-frequency region of a noise spectrum in order to increase the dimensions of a space region where noises are reduced. The inventive systems for carrying out said method are disposed in the regions of a more probable location of people which can be disturbed by the noise of aviation engines arranged inside an aircraft or thereoutside.