Whitehead G L, Goode R C, Rubin A M, Johnson W H, Bryce D P
Aviat Space Environ Med. 1977 Jan;48(1):5-6.
Changes in the ability to discriminate speech from a eucapnic state to hyperventilation and hypercapnia were investigated. Standard speech audiometric techniques were employed to determine the speech reception threshold and the speech discrimination values, while respiratory conditions were varied and measured utilizing a mixed-gas breathing method. Respiratory parameters were similar to those encountered in aircraft personnel who experience oxygen/pressure system malfunction. The results of the study suggest no significant change in the speech reception threshold while in a hyperventilated or hypercapnic state. The speech discrimination results, however, suggest a significant performance decrement while in a state of hyperventilation.
研究了从正常二氧化碳状态到过度通气和高碳酸血症状态下语音辨别能力的变化。采用标准言语测听技术来确定言语接受阈值和言语辨别值，同时通过混合气体呼吸法改变并测量呼吸条件。呼吸参数与经历氧气/压力系统故障的航空人员所遇到的参数相似。研究结果表明，在过度通气或高碳酸血症状态下，言语接受阈值没有显著变化。然而，言语辨别结果表明，在过度通气状态下，表现会显著下降。
