Adult Voice Pitch Drifts With Age in Opposite Directions by Sex
The instrument keeps changing after puberty, and the seed paper measured how. Female pitch falls from 223.3 Hz at ages 20 to 30 to 197.4 Hz at 60, about -0.8 Hz per year; male pitch sits at 124.0 Hz and is flat until 60, then rises about +0.6 Hz per year to 136.5 Hz at 90 (PAPER_FACTS). Carrying these as measured facts, with mechanism kept to the length-mass-tension node, gives the student the ~26 Hz lifetime scale they need later to judge whether a per-allele effect is large.
Questions this Concept answers
- What does it mean that men's average pitch was flat until about 60 and then rose?
PDF An Acoustic Analysis on Voice Changes in Adults and Geriatrics - IJHSR
An acoustic study of 118 healthy adults aged 30-60 measured fundamental frequency, jitter, shimmer and harmonics-to-noise ratio from sustained vowels using Praat. It reports the sex-divergent pattern…