Correlation between measures of perceptual assessment of GRB and contact quotient (CQ).

Objective: The aim of the present workis to correlate the perceptual parameters grade, roughness and breathiness of the GRB scale with the contact quotient (CQ) obtained by electroglotography.
Material and Method: 70 samples of normal and pathological voices were analyzed by means of auditory-perceptual analysis and electroglotography. The perceptual analysis was carried out by two expert judges depending on the parameters grade, roughness and breathiness. The CQ values were obtained through the VoceVista System Version 3.3.7.
Results: The results show a strong correlation between CQ and breathiness (r = -0.869), whereas between grade of dysphonia and CQ (r = -0.567), and roughness and CQ (r = 0.643) the correlation is average.
Conclusions: It is possible to establish relationships between the vibrational behavior of the vocal folds and the resulting phenomenon that we perceive auditively. The most relevant parameter in this respect was breathiness. The correlation between grade, roughness and CQ was weaker.
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