Influence of Facial, Head, and Neck Dimensions on Vocal Acoustic Parameters in Polish Speakers

The relationships between human voice parameters and body dimensions have been previously described, but the connections between voice and face geometry remain poorly researched. This study aimed to determine the relationships between face dimensions and acoustic parameters in both sexes and examined 111 adult participants (30 males). Each participant underwent voice recording, which included five sustained vowels, along with anthropometric measurements of the neck, head, and face regions. Comparison of the voice and the head, face, and neck regions employed Pearson’s correlation coefficients (r) and a multiple linear regression model. The results revealed significant relationships between head, neck, face dimensions and acoustic parameters in both sexes. Males with higher noses, greater head circumferences and wider faces tended to have lower formants and more stable voices. Females with higher head circumferences had lower formant values, and those with more substantial neck circumferences tended to have more stable voices. Also, females with increased nose height had a lower fourth formant. Moreover, females with wider faces, noses, and jaws tended to have less rough voices (lower jitter) and longer MPT. These findings may be useful for scientists and law enforcement authorities for creating algorithms that build face models based on voice signals.