Department of Linguistics, State University of Campinas, Campinas, São Paulo, Brazil.
Department of Human Development and Rehabilitation, State University of Campinas, Campinas, São Paulo, Brazil.
J Voice. 2019 Sep;33(5):649-658. doi: 10.1016/j.jvoice.2018.04.018. Epub 2018 Aug 23.
OBJECTIVES/HYPOTHESIS: This study aims to analyze the effect of telephone transmission on the voice quality perception of subjects with dysphonia and seeks to contribute to the use of perceptual voice analysis in forensic context. The main hypothesis is that the auditory perception of voice quality differs according to the acoustic quality of the speech material.
Eight male speakers were simultaneously recorded directly by a digital recorder and over a mobile phone.
A perceptual experiment containing 21 speech samples was used. The samples were analyzed via an online adaptation of the Vocal Profile Analysis Scheme (VPAS) into Brazilian Portuguese by a group of six voice-specialized professionals. Data analysis included the relative frequency of the 10 most evaluated VPAS settings in both recording conditions, and the relative frequency of the VPAS groups of features. A multidimensional scaling technique was applied to investigate the perceptual distance between stimuli pairs from both recording conditions. This was followed by a nonparametric multiple linear regression analysis that aimed to comprehend the underlying variables that motivated the spatial arrangement of the stimuli.
The telephone transmission effect may have an influence on assessing correctly the supralaryngeal, laryngeal, prosodic, and temporal VPAS settings. The perceptual distance between stimuli pairs were mainly motivated by the rating of velopharyngeal system, respiratory support, laryngeal tension, speech rate, and creaky voice.
The auditory perception differences between the stimuli pairs with different acoustic qualities could be related to the mobile phone bandwidth and data compression, and to telephone interaction characteristics. A group of laryngeal, supralaryngeal, temporal, and respiratory settings was mainly related to the dissimilarities reported. In terms of the application of VPAS in forensic context, the protocol was considered a relevant scientific tool that enables standardizing and analysis comparison among different groups of forensic specialists.
目的/假设：本研究旨在分析电话传输对发音障碍受试者语音质量感知的影响，并为感知语音分析在法医领域的应用提供参考。主要假设是，语音质量的听觉感知因言语材料的声学质量而异。
8 名男性说话者同时通过数字录音机和移动电话进行直接录音。
使用包含 21 个语音样本的感知实验。样本通过一组 6 名语音专业人员对 Vocal Profile Analysis Scheme（VPAS）的在线改编，以巴西葡萄牙语进行分析。数据分析包括两种录音条件下 10 个评价最高的 VPAS 设置的相对频率，以及 VPAS 特征组的相对频率。应用多维尺度技术研究来自两种录音条件的刺激对之间的感知距离。随后进行非参数多元线性回归分析，以理解驱动刺激空间排列的潜在变量。
电话传输效果可能会影响对额咽、喉、韵律和时间 VPAS 设置的正确评估。刺激对之间的感知距离主要受软腭系统评价、呼吸支持、喉紧张度、语速和摩擦声的影响。
具有不同声学质量的刺激对之间的听觉感知差异可能与移动电话带宽和数据压缩以及电话交互特性有关。一组喉、额咽、时间和呼吸设置主要与报告的差异有关。就 VPAS 在法医领域的应用而言，该方案被认为是一种相关的科学工具，可实现不同法医专家群体之间的标准化和分析比较。
