Correlation between Pathological Voice Onset and Voice Quality Based on Vocal Attack Time(VAT) and Multidimensional Voice Parameters

Correlation between pathological Voice Onset and Voice Quality of Chinese patients based on Vocal Attack Time(VAT) and Multidimensional Voice Parameters is discussed in this paper. The test subjects were divided into three groups, one is normal voice group and the other two are pathologic voice groups, namely, vocal cord polyps and non vocal cord polyps. We recorded the EGG signal for the above subjects and extracted the Jitter, Shimmer, HNR and VAT parameters by the relevant software. The VAT and other voice parameters at /a:/, /i:/ and /u:/ vowels were then compared and analyzed in different groups. The results showed that there was no significant difference in the VAT between the three groups at /a:/, /i:/, and /u:/ vowels. In addition, the analysis of VAT changes in a patient with vocal cord polyps before and after surgery revealed that neither the overall difference in stops nor the difference in manner of aspiration or not was significant, indicating VAT is not a specific indicator of vocal cord polyps.