Department of Speech Communication and Voice Research, University of Tampere, Tampere, Finland.
J Voice. 2009 Nov;23(6):671-6. doi: 10.1016/j.jvoice.2008.03.008. Epub 2008 Jul 10.
Voice quality has mainly been studied in trained speakers, singers, and dysphonic patients. Few studies have concerned ordinary untrained university students' voices. In light of earlier studies of professional voice users, it was hypothesized that good, poor, and intermediate voices would be distinguishable on the basis of long-term average spectrum characteristics. In the present study, voice quality of 50 Finnish vocally untrained male university students was studied perceptually and using long-term average spectrum analysis of text reading samples of one minute duration. Equivalent sound level (Leq) of text reading was also measured. According to the results, the good and ordinary voices differed from the poor ones in their relatively higher sound level in the frequency range of 1-3 kHz and a prominent peak at 3-4 kHz. Good voices, however, did not differ from the ordinary voices in terms of the characteristics of the long-term average spectrum (LTAS). The strength of the peak at 3-4 kHz and the voice-quality scores correlated weakly but significantly. Voice quality and alpha ratio (level difference above and below 1 kHz) correlated likewise. Leq was significantly higher in the students with good and ordinary voices than in those with poor voices. The connections between Leq, voice quality, and the formation of the peak at 3-4 kHz warrant further studies.
嗓音质量主要在经过训练的说话者、歌手和声音障碍患者中进行研究。很少有研究关注普通未经训练的大学生的嗓音。鉴于早期对专业嗓音使用者的研究，人们假设可以根据长期平均频谱特征区分良好、较差和中等嗓音。在本研究中，研究人员对 50 名芬兰未经训练的男性大学生的嗓音质量进行了感知和使用文本阅读样本的长期平均频谱分析（持续一分钟）。还测量了文本阅读的等效声级 (Leq)。根据结果，良好和普通嗓音与较差嗓音在 1-3 kHz 频率范围内的相对较高声级和 3-4 kHz 处的突出峰值不同。然而，良好嗓音与普通嗓音在长期平均频谱（LTAS）特征方面没有差异。3-4 kHz 处峰值的强度和嗓音质量评分之间存在微弱但显著的相关性。嗓音质量和阿尔法比（1 kHz 以上和以下的电平差）也存在类似的相关性。良好嗓音和普通嗓音的学生的 Leq 显著高于较差嗓音的学生。Leq、嗓音质量和 3-4 kHz 处峰值形成之间的联系需要进一步研究。
