REFERENCE DGICYT - PB91 - 0278
TÍTLE The prosecution of the speech and the acoustic invariación in Spanish.
CHAIR Dr. Eugenio Martínez Celdrán
DURATION 1992-1994 
ABSTRACT The objective of this investigation is to find all the acoustic invariates index in the consonants and vowels of Spanish. This implies to investigate through different speakers and dialects those components of the acoustic signal that are presented with some same characteristics of frequency and amplitude. The topic has a double interest: in the first place, to develop an acoustic-perceptive phonetics for the Castilian that is almost an unexplored field in the bibliography; in second place, to carry out a work from a great face importance to the automatic speech recognition. The study is inserted in the «theory of acoustic invariance of speech» developed, mainly, in England and United States for investigators as Blumstein, Stevens, Kewlwy-Port, Repp...