| Title | [Ergonomical study on Chinese speech warning]. | ||
| Author | Han, D; Zhou, C; Liu, Y; Zhai, Y | ||
| Journal | Space Med Med Eng (Beijing) | Publication Year/Month | 1998-Feb |
| PMID | 11541261 | PMCID | -N/A- |
| Affiliation | 1.Institute of Space Medico-Engineering, Beijing, China. | ||
Ergonomical experiments on speech warning under noise background were carried out in 40 healthy males, aged 20-33. Through the determination of auditory reaction time to the Chinese speech warning under dual-tasks and the subjective evalution of the suitable time length of main warning voice by the subject, the optimum parameters of Chinese speech warning in accordance with space ergonomics were determined. It was found that: suitable time length of main warning voice is 0.35-0.55s, main interval is 0.15-0.35s, speech speed is 4-6 word/s, and sentence interval is 0.2-0.4s. Meanwhile, the analysis of heart rate (HR) and heart rate variability (HRV) demonstrated that the speech warning using aforementioned parameters didn\'t increase the operator\'s work load. The results can serve as the objective ergonomical basis and the evaluation criterion for design of speech warning in manned space vehicle.