According to the standard of aircraft noise environment around Airport(GB9660-88)and with reference to the computing method ICAO(International Civil Aviation Organization)and SAE(Society of Automotive Engineers),this paper makes a detailed impact analysis of a certain civil airport s aircraft noise.

As the civil aviation industry developing,aircraft noise pollution is getting more and more serious environment problem.

The calculation of noise flight path of civil transport jet aircrafts is an important step in the aircraft noise certification.

The problems occurred in the measurement of noise airworthiness verification to a light propeller airplane and the ways to solve them, which include the methods to monitor the flight path and measure the altitude of the airplane when it is over the measurement point, to select the acoustic equipments and to calculate the confidence range of measurement data are described.

By analyzing the characteristic of the power spectrum of aviation noise, short-time energy in frequency domain is used to detect voice activity.

According to collecting real data of aviation noise, comparing the outcomes of classical spectral subtraction and modified algorithm, the result showed the modified algorithm could eliminate aviation noise effectively and improve the intelligibility and SNR of speech signal.