[Rehilamiento: description]

The work analyses the way in which the 'rehilamiento' presents itself. It presents itself as an acoustic stochastic field, superposed on an acoustic periodic field, as a consequence of two articulatory constrictions: the one at the oscillating vocal cords and the other at any place in the pharynx. The auditory perception of the 'rehilamiento' is simply one of voiced friction. The oscillograms presented confirm that in the language of Buenos Aires the realization [z] tends to conserve its voiced quality among men while losing it among women.