Key Technologies of Low Altitude Target Passive Acoustic Recognition
LEI Ming
QIAO Ke
Abstract：Low altitude target passive acoustic detection technology is playing a more and more important role in modern warfare.Some key technologies of passive acoustic recognition for low altitude targets are studied.Firstly, from the similarity of low altitude target sound signal and the characteristics of speech signal, it is proved that the low altitude target passive acoustic recognition and speech recognition can be used in the same way.Then, the time-frequency analysis of the acoustic signals of the four rotor aircraft is carried out, and a low altitude target recognition method based on MFCC parameters is proposed.Finally, the key technologies of low altitude target sound recognition technology is discussed, the MFCC in feature extraction is analyzed emphatically and simulation identification experiment is carried out using dynamic time warping (DTW) algorithm, laid the foundation for the development of low altitude target sound recognition system.
Keywords：passive voice recognitionendpoint detectionMFCCdynamic time warping
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 645-649 )