Speaker idiosyncrasy on phonetic regularities in function of temporal parameters of voice

Sex, age, emotional state of the subject, pathological voices ... are characteristics than allow us recognise different speakers. The accent difference persons of different regions, indeed their tone establish inequality between analogous voices; intensity and timbre differ voices with similar tones; pauses, tempo, idea's speed ... condition an unique and discriminate voice for each speaker. Previous studies have researched the possibility of studying the speaker idiosyncrasies on phonetic regularities, by mean of temporal parameters like the segmental duration. This kind of characteristics have the property of a very easy measurement, they are very stables by the time and have a minimal change in function of the different environment. All this characteristics allow us, in a practical term, remark the idiosyncrasic pattern of each speaker. Introduction and aim Variation characterized speech production. Research has focused on assessing variation that can be attributed to well-determined factors. A large number of factors have been found to affect the duration of segments and sequences of segments; e.g. phrase-final position, differences intrinsic to the segment type, effects of phonetic context, stress ... (Hollien, 1990 [1]; Mendoza and Carballo, 1998 [2]). Variation that cannot easily be attributed to identifiable factors is labeled "residu:al or error variation". Two sources contribute to this kind or variation in speech: intraand inter-speaker variation. Intraor within-speaker variation is observed when a single speaker repeats the same utterance several times in the same (paralinguistic) contexts; interor between-speaker variation is found when several speakers speak the same utterance in the same context (Heuvel, H. Van den, Rietveld, T. And Cranen, B.,1994 [3]). Previous studies (Bartkowa, 1988 [ 4]; Broeders and Rietveld, 1989 [5]; Campbell, 1990 [6]; Campbell and lsard, 1991 [7], addresses a number of issues concerning the effects of speaker idiosyncrasies on phonetic regularities, by means of temporal parameters. Said regularities provoke that the speech of each speaking will be independent and differentiate, in their characteristic more intimate, of the speech of any speaker of their same language. In these investigations they observed consistent differences between speakers, also intra-subjects stability for temporal measurements of voice. Our objective is to establish objective bases that permit us to isolate said intrinsic characteristics to each speaking particular, in individual parameters function. Said parameters could be spectral (tone, pitch, formants), or well temporary parameters as the that occupy us in this case. In the current study we tried to check if the same temporal parameters provided us similar results in Spanish language. We have check the segmental duration, like the duration of vowels and consonants in each position (Umeda, 1975, 1977 [8,9]; O'Shughnessy, 1981,1984 [10,11]; Crystal and House, 1988ab [12,13]; Johnson, Ladefoged and Lindau, 1993 [14]. We need that the measures of the variables were reliable and constant for each person, if we want to study these difference to know these particularities, but also these variable ought allow us to estimate interindividual and cluster difference. First we want to know the phonetic regularities of the Spanish language. After we need to know the common manner of the phonetics regularities of Spanish people, in the sense of the relative duration of every vowel and consonant, in function of their occupied position in the phrase. Furthermore, we pretended verified that the measures we obtained from different subjects had internal consistence. MAVEBA 1999, Firenze, Italy 171 Models and Analysis of Vocal Emissions for Biomedical Applications