In this paper we consider wavelet analyses of acoustic signatures of ground vehicles. We select two test cases, a squeak emanating from a tank track and the clatter of a tank running on pavement. We examine various cost functions that can be utilized in determining which set of wavelet basis functions give the most accurate representation of a given signal. We compare different orthogonal and biorthogonal wavelet transforms with each other and with the local cosine transform. We found that the local cosine transform performed better for the squeak than the particular wavelet packet transforms that we used, while they both gave approximately equivalent results for the clatter signal.

Date Published: 6 April 1995
PDF: 11 pages
Proc. SPIE 2491, Wavelet Applications II, (6 April 1995); doi: 10.1117/12.205418

Published in SPIE Proceedings Vol. 2491:
Wavelet Applications II
Harold H. Szu, Editor(s)