[Perceptual evaluation of dysphonia: correlation with acoustic parameters and reliability].

The perceptual GRBAS scale for analysis of voice quality is quite important clinically in voices that cannot be effectively analyzed with a voicing parameter method like vocalizations with strong subharmonics and modulations and in chaotic or random voices. In the present study, two experiments were performed: Firstly, GRBAS/acoustical correlations were investigated in 107 pathological voices. Secondly, the GRBAS interrater and intrarater agreement. The severity of dysphonia was assesed better by breath related parameters and low fundamental frequencies. The presence of subharmonics in the power spectrum had not a significant relationship with the degree of roughness. A (asthenic) and S (strain) scales. The results of this study show that GRBAS test-retest reliability and intrerrater agreement is high.