DocumentCode :
1934853
Title :
Influence of window width selection in fault diagnosis of loudspeaker based on Short-time Fourier Transform
Author :
Zeng-pu, Xu ; Li-xiang, Hu ; Yu-ming, Qi
Author_Institution :
Coll. of Mech. Eng., Tianjin Univ. of Sci. & Technol., Tianjin, China
Volume :
5
fYear :
2010
fDate :
9-11 July 2010
Firstpage :
564
Lastpage :
567
Abstract :
It is important that selects window function and width to Short-time Fourier Transform(STFT). Especially, when diagnosing fault loudspeaker, the different analysis window function and width can influent the result of analysis on respond signal of loudspeaker. So, it proposed a selecting analysis window function and width method based on the energy correction factor, the maximum side lobe and main lobe peak value in the frequency domain. Through reasonable selecting analysis window function and width, it can reduce the influence of truncation of signal caused by the Gibbs phenomenon and resolve the frequency resolution problem on STFT. Therefore, it can be more accurately to extract the fault feature of loudspeaker, and improve the loudspeaker on-line automatic fault detection accuracy.
Keywords :
Fourier transforms; audio signal processing; fault diagnosis; frequency-domain analysis; loudspeakers; Gibbs phenomenon; automatic fault detection; energy correction factor; fault diagnosis; frequency domain; loudspeaker signal; main lobe peak value; maximum side lobe; short-time Fourier transform; signal truncation; window width selection; Gibbs; Loudspeaker; STFT; Window width;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5537-9
Type :
conf
DOI :
10.1109/ICCSIT.2010.5563855
Filename :
5563855
Link To Document :
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