Why Sex and Age Dominate Any Model of Voice Pitch
The specific covariate lesson for this trait, and terminal understanding 4. In the seed sample, males sit about 5 SD below females, female pitch falls from 223.3 Hz at ages 20 to 30 to 197.4 Hz at 60 (about -0.8 Hz per year), and male pitch is flat until 60 then rises about +0.6 Hz per year to 136.5 Hz at 90. Against that, a per-allele 0.11 SD is a rounding error, and the student should feel the ratio.
Questions this Concept answers
- Why are sex and age accounted for in a model of voice pitch before sequence variants are tested?
Presbyphonia
This review explains why voice pitch is governed first by sex and then by age. It traces fundamental frequency to sex hormones acting on the larynx: male and female voices differ little before pubert…