The application of DWT for determining the level of audibility
Vincenzo Niola, Giuseppe Quaremba · 2006
Abstract:- Normally, the level of audibility is investigated by means of the Evoked Potentials. These patterns are examined by two independent observers in order to define their features. In particular, the threshold value is obtained by calculating, for each ear, the average of the lowest intensity at which the response was revealed and the highest intensity at which the response disappeared. The aim of the work is to objective the determination of threshold of audibility of auditory Evoked Potentials response and their classification in terms of reliability based on the multiresolution analysis performed by wavelets. Actually the analysis performed by wavelet represents an advanced technique of windowing. It concurs to use a long interval in the case the information must be excreted from detailed low frequency signal. A wavelet is, like suggests the name, a small wave. Many physical phenomena show a structure like wavelet. From a methodological point of view, the wavelet technique provides a multiscale analysis of the signal as a sum of orthogonal signals corresponding to different time scales hierarchically organized.