Garrett K L, Healey E C
J Acoust Soc Am. 1987 Jul;82(1):58-62. doi: 10.1121/1.395437.
The purpose of this study was to determine the amount of variation for several vocal parameters across three times of the day (morning, noon, and afternoon). Connected speech samples from normal adult males (N = 10) and females (N = 10) were recorded during morning, early afternoon, and late afternoon. Results showed that males produced a statistically significant increase in speaking fundamental frequency (SFF) from morning to afternoon. Females did not demonstrate a statistically significant change in SFF across the three time periods. Vocal amplitude did not change significantly for either group. The SFF variability was higher for the females than for the males. Analysis of individual data revealed that the patterns of vocal change across the three times of day were not consistent among the subjects.
本研究的目的是确定一天中三个时间段（上午、中午和下午）内几个嗓音参数的变化量。在上午、下午早些时候和下午晚些时候，记录了正常成年男性（N = 10）和女性（N = 10）的连贯语音样本。结果显示，男性从上午到下午的言语基频（SFF）有统计学上的显著增加。女性在这三个时间段内的SFF没有显示出统计学上的显著变化。两组的嗓音幅度均无显著变化。女性的SFF变异性高于男性。对个体数据的分析表明，一天中三个时间段的嗓音变化模式在受试者之间并不一致。
