Barsties Ben, Verfaillie Rudi, Roy Nelson, Maryn Youri
Codas. 2013;25(4):310-8. doi: 10.1590/s2317-17822013000400003.
To analyze the impact of body weight and body fat volume on selected parameters of vocal quality, phonatory range, and aerodynamics in females.
Based on measurements of body mass index in combination with body fat volume, 29 normophonic female subjects were classified as normal weight, underweight, and obese. Voice quality was investigated via auditory-perceptual ratings of breathiness, roughness, and overall dysphonia severity, via various acoustic measures and a multiparametric index. Phonatory range performance was examined using selected measures of the voice range profile and speech range profile. Measures of vocally relevant aerodynamics included vital capacity (i.e., VC), expected VC, phonation quotient, and maximum phonation time (i.e., MPT).
Significant differences between the three weight groups were found across several measures of intensity, VC, MPT, and shimmer. As compared to the other groups, significantly higher values of maximum and minimum intensity levels, as well as sound pressure level during habitual running speech were observed for the obese group (all p-values<0.05); whereas, the underweight group had significantly lower values for VC and ratio of expected to measured VC (p-values<0.01). Furthermore, underweight subjects differed significantly as compared to normal weight subjects with lower MPT (p=0.025) and higher lowest-F0 (p=0.035). Finally the obese group showed significantly lower shimmer values than the normal weight subjects (p<0.05).
Body weight and body fat volume appear to influence select objective measures of voice quality, vocal aerodynamics, and phonatory range performance.
分析体重和体脂量对女性嗓音质量、发声范围和空气动力学相关选定参数的影响。
根据体重指数与体脂量的测量结果，将29名发声正常的女性受试者分为正常体重、体重过轻和肥胖三类。通过对呼吸音、粗糙音和总体发声障碍严重程度的听觉-感知评分，以及各种声学测量和多参数指标来研究嗓音质量。使用嗓音范围剖面图和言语范围剖面图的选定测量方法来检查发声范围表现。与发声相关的空气动力学测量指标包括肺活量（即VC）、预期肺活量、发声商和最长发声时间（即MPT）。
在强度、肺活量、最长发声时间和微扰等多项测量指标上，三个体重组之间存在显著差异。与其他组相比，肥胖组的最大和最小强度水平以及习惯性连续言语期间的声压级显著更高（所有p值<0.05）；而体重过轻组的肺活量以及预期肺活量与实测肺活量的比值显著更低（p值<0.01）。此外，体重过轻的受试者与正常体重的受试者相比，最长发声时间显著更短（p=0.025），最低基频显著更高（p=0.035）。最后，肥胖组的微扰值显著低于正常体重受试者（p<0.05）。
体重和体脂量似乎会影响嗓音质量、发声空气动力学和发声范围表现的某些客观测量指标。
