Then, the pattern recognition
stage (Section 5) is considered, starting with the
signal analysis scheme (Subsection 5.1), and followed by
the two considered classifiers (Subsection 5.2), respectively
based on Gaussian Mixtures Models (GMM) and
Hidden Markov Models (HMM). The main contribution
of the paper is exposed in Subsection 5.3, dealing with
robustness improvement based on multimodels. Section 6
discusses the global performance of the detection and
recognition system operating under gaussian white noise,
whereas Section 7 reports results achieved with real
background noise. Finally, concluding remarks and future
works considerations appear in Section 8