A study method of noise effects on the acoustic parameters of speech signal

摘要

This study is part of adaptive mechanisms research in speech production. We were interested to acoustic variations of the voice message when the speaker is placed in a noisy environment. We propose a methodology to highlight the articulatory strategies adopted by the speaker to adapt to the noisy environment. This methodology consists of two parts: a noise effect analysis on the timing in the one hand and on the frequency envelope of the speech signal in the other. In addition, we also highlighted the strategies adopted in the event of significant decrease of auditory feedback in the presence of noise [1]. The results are considered good because they rejoin those found in literature[1][22]. Furthermore, the methodology proposed in this study can be used in rehabilitation for the deaf (test the degree of hearing loss before and after treatment), in communication systems (level estimation of the signal alteration by noise before its transmission, in coding speech, recognition, synthesis etc…)