A new time-frequency representation for underwater acoustic signals: The denoised hearingogram

With the aim to develop a new process useful for underwater acoustic signal identification, with human perception considerations, we have presented in a previous paper [1] the hearingogram. Despite the presence of noisy terms, experimentations on real data have revealed the validity of such an approach. In order to reduce the noise level, we propose, in this paper, to modify this time-frequency transform using a wavelet based denoising method. Experimentation on real underwater signals are presented and discussed.