Nuevos datos para la caracterización acústica del seseo

This paper addresses the phenomenon of the Castilian lisp Basque from two parameters: analysis of evidence in documents of the 16th–19th centuries, late medieval securing data as it is produced in centuries to come, and an analysis of the seseo of the current speakers lisp in order to get a phonetic description of a phenomenon that in view of the results is dying among the younger bilinguals. Palabras clave