Acoustic parameters of ficative sounds of galician
Keywords:
fricativas, fonética acústica, fonética articulatoriaAbstract
The fricative sounds of the Galician language have been the topic of several descriptive works, whereas only a few partial studies have examined the acoustic properties of those sounds. In this paper we study the acoustic parameters of the sounds realized by the phonemes f T s s° S in five areas of Galicia[1]. To carry out this research, five women and five men were asked to pronounce common words containing those sounds. The study was designed considering several phonemes that belong to the standard language f T s s° S and was carried out in five areas in Galicia where there are varieties with an opposition s T and s° T and varieties that lack T. The analysis focuses on the shape of the spectrum, where frequency, intensity and bandwidth of peaks were measured. Frequency of noise onset, fricative duration and vowel-consonant relative intensity were also considered as objects of analysis. The speakers' utterances corresponding to f T s s° S were classified in groups; thus f T S capture all the spectral variety perceptively identified with the labiodental fricative, non-sibilant dental and post-alveolar sibilant consonants respectively. The cases of s s°, produced with a higher volume in this study because of the "seseo" pronunciation and the syllable margins in which they appear, could be classified in the sets [s1] [s2] [s3][2]. The basic criteria for grouping was the relevance of the spectrum peak with the highest intensity. The contact with a labialized vowel was crucial for changing the configuration of the shape of the spectrum, especially in the case of sibilants. Differences in the shape of the spectrum lead us to think that there are changes in the articulation of the fricative sound. These changes could be caused either by the area of approximation of articulators or by the part of the tongue involved.
[1] This work is an extract of the doctoral dissertation of the author.
[2] The groups of sounds [s1], [s2] and [s3] are written in brackets in order to signal their nature as sets of phonetic realizations.
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