Artkoski Marjanna, Tommila Johanna, Laukkanen Anne-Maria
Department of Speech Communication and Voice Research, University of Tampere, Tampere, Finland.
Logoped Phoniatr Vocol. 2002;27(3):118-23. doi: 10.1080/140154302760834840.
Various changes in vocal parameters have been observed during the working days of voice professionals, e.g. teachers. The present study investigated vocal parameters during daytime when voice was not used. Eleven females and ten males (mean ages 30 and 40 years) volunteered as subjects. They recorded the same reading task in the forenoon and in the afternoon with an interval of 6-8 hours. Between the recordings voice use was avoided. Six females repeated the test in six days with the intervals from one week to three months. Fundamental frequency (F0) and sound pressure level (SPL) were measured. Voice quality was studied by calculating the alpha ratio (SPL 1000-5000 Hz/SPL 50-1000 Hz). In most cases F0 was higher in the afternoon, although the change was on the average small (in most cases within 5 Hz) and statistically non-significant. Alpha ratio was significantly higher for the females and lower for the males in the afternoon. Similar changes have been reported after vocal loading. The results suggest that studies on the effects of vocal loading should also address changes in vocal parameters when no vocal loading is present. Gender difference in the vocal changes warrants further study.
在诸如教师等嗓音职业者的工作日期间，已观察到嗓音参数的各种变化。本研究调查了在白天未使用嗓音时的嗓音参数。11名女性和10名男性（平均年龄分别为30岁和40岁）自愿作为受试者。他们在上午和下午记录相同的朗读任务，中间间隔6至8小时。在两次录音之间避免使用嗓音。6名女性在6天内重复进行测试，间隔时间从一周到三个月不等。测量了基频（F0）和声压级（SPL）。通过计算α比率（1000 - 5000赫兹声压级/50 - 1000赫兹声压级）来研究嗓音质量。在大多数情况下，下午的F0较高，尽管变化平均较小（大多数情况下在5赫兹以内）且在统计学上无显著意义。下午女性的α比率显著更高，男性的α比率更低。在嗓音负荷后也有类似的变化报道。结果表明，关于嗓音负荷影响的研究也应关注在无嗓音负荷时嗓音参数的变化。嗓音变化中的性别差异值得进一步研究。
