[A study of effects of head-down bed-rest simulated weightlessness on phonetic features of Chinese].
OBJECTIVE
To study the changes of phonetic features of Chinese speech during head-down bed-rest (HDBR) simulated weightlessness.


METHODS
During -6 degrees HDBR in 6 healthy subjects (20-30 years), acoustic-phonetic features were analyzed.


RESULTS
The duration of utterance was slightly increase in the first two days, and recovered after the fourth day of HDBR; mean energy decreased along with time of bed rest, t-tests showed that the decrease in energy of utterances was very significant; a decrease in fundamental frequencies under HDBR was also significant.


CONCLUSIONS
There were certain changes in the acoustic phonetic features under HDBR, some of them were significant.
Liu
Z G
ZG
Institute of Space Medico-Engineering, Beijing, China.
Huang
D S
DS
Zheng
S X
SX
D000328:Adult; D001510:Bed Rest; D002681:China; D018475:Head-Down Tilt; D006801:Humans; D010700:Phonetics; D013060:Speech; D013061:Speech Acoustics; D013997:Time Factors; D018474:Weightlessness Simulation