It this article, is described the apparatus producer of sounds anatomicophysiological structure (acoustics apparatus), which for amphibiens has its particulates of morphofunctional organization. Then it passed to the temporal and spectral structure’s descripton of greenish-toad claim song – Bufo viridis Laur (taken like a model-species of amphibiens equadated in Republic of Moldova), this description beeing accompanied by an unfolded analise of factors which, acting in direct or indirect mode on acoustics apparatus, alter and establish, till the end, the main characteristics (parametres) of emited claim sound.