Title :
A comparison between spectral and bispectral analysis for ship detection from acoustical time series
Author :
Regazzoni, C.S. ; Tesei, A. ; Tacconi, G.
Author_Institution :
Dept. of Biophys. & Electron. Eng., Genoa Univ., Italy
Abstract :
An acoustic underwater communication problem is considered at low frequency ranges (up to 1 kHz), where propagation performances are improved. This range is dominated by ship noise components and is expected to be non-Gaussian. Classical detector performances may decay in the presence of non-Gaussianity. Spectrum-based and bispectrum-based methods have been used and compared to statistically characterize shipping noise and then to design non-conventional detectors; the main process properties are stationarity, frequency composition and coupling, Gaussianity. Analysis results are reported and refer to real acoustic data recording background traffic and a known-target-ship passage
Keywords :
acoustic noise; acoustic signal detection; ships; spectral analysis; underwater sound; Gaussianity; acoustic time series; acoustic underwater communication problem; background traffic; bispectral analysis; coupling; frequency composition; known-target-ship passage; nonGaussian noise; propagation performance; ship detection; ship noise components; spectral analysis; stationarity; Acoustic noise; Acoustic propagation; Acoustic signal detection; Detectors; Frequency; Low-frequency noise; Marine vehicles; Spectral analysis; Underwater acoustics; Underwater communication;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.389663
