摘要:The aim of this study is to analyse the relevance of the duration of the tonic vowelscompared to the pre-tonic and pos-tonic ones in a formal speech corpus emitted bytwelve speakers from two Canary Islands, El Hierro and Fuerteventura. We takeinto account the intonational mode (declarative vs. interrogative), the type of stress(oxytone, paroxytone, proparoxytone) and its position in the sentence (NP and PP),in addition to the sociolinguistic variables diatopia and gender. The acousticanalysis has been carried out with Matlab. The statistical significance has beendetermined from the results obtained by means of the application of the t-test forrelated samples and the perceptual significance was calculated from perceptualthreshold of 36%. The statistical and perceptual results, as was expected, do notcoincide, for they are more significant from the first perspective.