Summary: Researchers have identified common sequence variants in the gene ABCC9 that are linked to differences in human voice pitch.
Using nearly 13,000 speech recordings from Icelandic volunteers together with genomic sequence data, scientists performed the first large-scale analysis connecting genetic variation to acoustic features of the human voice. The study found ABCC9 variants that are associated with higher voice pitch in both men and women. Those same variants also show associations with higher pulse pressure, suggesting an unexpected connection between vocal traits and cardiovascular-related measures.
Beyond pitch, the team examined vowel acoustics and identified a measurable heritable component in how vowel sounds are produced—likely reflecting anatomical differences in the vocal tract that shape resonance and formant frequencies. Together, these results illuminate genetic contributions to voice diversity and offer new leads for studying the biology of speech.
Key Facts:
- This study is the first comprehensive, population-scale investigation into genetic influences on voice pitch, leveraging almost 13,000 Icelandic speech samples paired with genome sequence data.
- The researchers discovered common variants in ABCC9 that correlate with higher voice pitch in both sexes; these same variants are also associated with higher pulse pressure, a cardiovascular trait, indicating links between vocal acoustics and health-related phenotypes.
- Measurements of vowel acoustics show a heritable component that likely reflects physical features of the vocal tract, demonstrating that both anatomy and genetics contribute to how vowel sounds are produced and perceived.
Source: deCODE Genetics
In a paper published in Science Advances, an international team led by deCODE Genetics (an Amgen subsidiary) reports the discovery of sequence variants in the gene ABCC9 that influence voice pitch.
Speech and vocalization are defining human behaviors, yet the genetic architecture underlying natural variation in voice pitch and vowel acoustics has been largely unexplored. To address this gap, researchers combined acoustical analyses of recorded speech with comprehensive genetic data from participants in Iceland. The large, well-characterized cohort allowed the team to detect common genetic variants that correlate with subtle differences in voice and vowel production.
The analysis focused on acoustic markers such as fundamental frequency (commonly perceived as pitch) and measurable vowel features. By correlating these acoustic metrics with genetic variation, the team identified ABCC9 as a locus where common sequence variants are statistically associated with higher average voice pitch across the study population. Importantly, associations were consistent for both male and female participants.
In addition to the vocal associations, the same ABCC9 variants were found to link to higher pulse pressure, a physiological measure relevant to cardiovascular health. The variants also show relationships with adrenal gene expression and other cardiovascular traits, pointing to biological pathways that might connect systemic physiology and vocal characteristics. These findings do not imply direct causation but indicate correlated genetic influences worth further study.
The vowel acoustics component of the study revealed that aspects of vowel production—despite being shaped by cultural and linguistic context—also carry a heritable signal. Such heritability likely reflects anatomical differences (for example, vocal tract shape and resonance properties) that influence formant frequencies and other acoustic features of vowels. Identifying genetic influences on these acoustic traits helps distinguish the roles of anatomy, physiology, and environment in shaping speech.
Overall, this work advances our understanding of the genetic and biological bases of human vocal variation. By demonstrating measurable, heritable effects on both pitch and vowel acoustics and by linking a specific gene, ABCC9, to vocal characteristics and cardiovascular measures, the study opens new avenues for research into speech biology, evolutionary questions about vocal traits, and potential health-related associations.
About this genetics research news
Author: Thora Asgeirsdottir
Source: deCODE Genetics
Contact: Thora Asgeirsdottir – deCODE Genetics
Image: The image is credited to Neuroscience News
Original Research: Open access. “Sequence variants affecting voice pitch in humans” by Kari Stefansson et al., published in Science Advances.
Abstract
Sequence variants affecting voice pitch in humans
The genetic basis of the human vocal system is largely unknown, as are the sequence variants that give rise to individual differences in voice and speech. In this study, researchers combined genomic sequence diversity with acoustic analyses of speech recordings from 12,901 Icelandic participants. They show how voice pitch and vowel acoustics vary across the lifespan and how these acoustic measures correlate with anthropometric, physiological, and cognitive traits.
The investigators report that both voice pitch and vowel acoustics have a heritable component and identify correlated common variants in ABCC9 that associate with voice pitch. These ABCC9 variants also associate with adrenal gene expression and cardiovascular traits. By demonstrating genetic influences on vocal acoustics, this work represents an important step toward understanding the genetics and evolution of the human vocal system.