The Effect of Microgravity on the Human Voice, Phonation- A Single Case Study
This single-case study demonstrates that exposure to microgravity induces significant, subclinical alterations in human phonation—specifically marked reductions in vocal stability and contact quotient alongside increased jitter—likely caused by systemic fluid shifts and altered respiratory mechanics, thereby highlighting the need for continued monitoring and the potential use of vocal metrics as a health indicator for astronauts.