Kankare Elina, Liu Dong, Laukkanen Anne-Maria, Geneid Ahmed
Speech and Voice Research Laboratory, School of Education, University of Tampere, Tampere, Finland.
Folia Phoniatr Logop. 2013;65(2):98-104. doi: 10.1159/000354076. Epub 2013 Oct 19.
This study investigated whether different electroglottographic (EGG) parameters may be used to estimate voice quality and loading related to it, and whether voice quality is related to self-estimation of voice problems and laryngeal status. The effect of sample type was also considered.
EGG and acoustic signals of a sustained vowel [a:] (90 dB6 cm) and text reading during noise exposure were recorded from 93 female kindergarten teachers. Analyses were made from the sustained vowel and vowel [a:] from a stressed word. Contact quotient (CQ) was calculated. Maximum velocity of increase in contact area inferred from derivative (MDEGG) was examined. Fundamental frequency was calculated from the EGG signal. From the acoustic signal sound pressure level (SPL) was computed and pressedness in voice quality was evaluated perceptually. Self-evaluation was made with Voice Activity and Participation Profile (VAPP). Indirect laryngoscopy was also performed.
Pressedness in voice correlated with EGG results only for the sustained vowel, and better with MDEGG than CQ values. VAPP and laryngeal evaluation did not correlate with the acoustic or EGG parameters or with perception.
MDEGG is worth testing as an indicator of impact stress. Sustained vowel at a controlled SPL is more suitable for voice quality evaluation than a long stressed vowel from connected speech.
本研究调查了不同的电子声门图（EGG）参数是否可用于评估嗓音质量及其相关负荷，以及嗓音质量是否与嗓音问题的自我评估和喉部状态相关。同时也考虑了样本类型的影响。
记录了93名女性幼儿园教师在持续发元音[a:]（90分贝，距离6厘米）以及在噪声暴露下朗读文本时的EGG和声信号。对持续元音以及重读音节中的元音[a:]进行分析。计算接触商（CQ）。检查从导数推断出的接触面积增加的最大速度（MDEGG）。从EGG信号中计算基频。从声信号中计算声压级（SPL），并通过感知评估嗓音质量的紧绷度。使用嗓音活动与参与概况（VAPP）进行自我评估。还进行了间接喉镜检查。
仅持续元音的嗓音紧绷度与EGG结果相关，且与MDEGG的相关性优于CQ值。VAPP和喉部评估与声学或EGG参数以及感知均无相关性。
MDEGG作为冲击应力的指标值得测试。在可控声压级下的持续元音比连贯言语中的长重读音节元音更适合用于嗓音质量评估。
