NDLI: Spectral Kurtosis based system for transients' detection: Application to termite targeting

Content Provider	IEEE Xplore Digital Library
Author	de la Rosa, J.J.G. Moreno-Munoz, A. Gallego, A. Piotrkowski, R. Castro, E.
Copyright Year	2009
Description	Author affiliation: Univ. of Granada, Research unit PAIDI-TEP-232, Technical Architecture School, E-18071-Granada-Spain (Gallego, A.; Piotrkowski, R.; Castro, E.) \|\| Univ. of Cádiz. Electronics, Research Group PAIDI-TIC-168, EPSA-Av. Ramón Puyol S/N, E-11202-Algeciras-Spain (de la Rosa, J.J.G.) \|\| Univ. of Córdoba. Electronics, Research Group PAIDI-TIC-168, Albert Einstein building C-2, SPAIN, E-14071-Córdoba-Spain (Moreno-Munoz, A.)
Abstract	In this paper we present the operation results of a portable computer-based measurement equipment conceived to perform non-destructive testing of suspicious termite infestations. Its signal processing module is based in the Spectral Kurtosis (SK) and it can be applied to numerous kinds of transients' detection. We introduce the de-noising complement of the discrete wavelet transform (DWT) and we study how can it serves to reduce subjectiveness. The SK pattern allows the targeting of alarms and activity signals. The DWT complements the SK, by keeping the successive approximations of the termite emissions, supposed more non-Gaussian (less noisy) and with less entropy than the detail approximations. For a given mother wavelet, the maximum acceptable level, in the wavelet decomposition tree, which preserves the insects' emissions features, depends on the comparative evolution of the approximations details' entropies, and the value of the global spectral kurtosis associated to the approximation of the separated signals. The paper explains the detection criterion by showing different types of real-life recordings (alarms, activity, and background).
Starting Page	188
Ending Page	193
File Size	639922
Page Count	6
File Format	PDF
ISBN	9781424427864
DOI	10.1109/SAS.2009.4801804
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-02-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spectral Kurtosis Rotating machines Electronic equipment testing Sensor systems and applications Entropy Acoustic signal detection Discrete wavelet transforms Synthetic aperture sonar Insect detection Acoustic Emission Insects Acoustic noise Wavelet packets Higher-Order Statistics
Content Type	Text
Resource Type	Article

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