Behavior of speech acoustics parameters and compensatory strategies adopted in noised environment

Leila Falek , Hocine Teffahi , Amar Djeradi

We acoustically analyzed behavior of speech signal produced in noisy constraint by four speakers, when noise is sent by a helmet to speaker and when noise is sent by high speaker. The goal is to find speech signal acoustic parameters which are most sensitive to noise and the compensatory strategies adopted by the speakers to counter this constraint. Results obtained in both cases show a great constraint influence over timing, energy, fundamental frequency F0, formants (F1, F2) of the analyzed units. They can be summarized such as: (1) In temporal field: We noted an increase in analyzed units duration. We can conclude that speaker tends to slow down his elocution rhythm with constraint in order to better render comprehensible itself; (2) In energy field: there is an increase in intensity. Thus the speaker speaks extremely in noise constraint; (3) In frequential field: (a) We noted an increase in formants F0 and F1 but F2 stay stable in spite of noise constraint. It’s meaning that the speakers, while speaking extremely, increase their aperture but the vowels anteriority does not change. (b) Vocalic spaces are reduced with centralization. It’s meaning that the speakers modify their formants to avoid constraint while remaining understandable.

Domaines: Acoustique [physics.class-ph]

Leila Falek, Hocine Teffahi, Amar Djeradi. Behavior of speech acoustics parameters and compensatory strategies adopted in noised environment. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810570⟩