Vocal tone and effort of the vocal chords

Abstract

The variation of ten indicators of shimmer and jitter was observed in a sample of 71 subjects, all teachers of secondary education. The results show that the high vowels /i/ and /u/ present a higher F0 frequency and amplitude disturbance. It may be assumed that this is related to the greater effort to which the vocal chords are subjected when articulating /i/ and /u/. From a linguistic point of view, this fact is important both in the theoretical as well as applied aspects, particularly in language teaching and clinical phonetics.