Van Stan Jarrad H, Mehta Daryush D, Hillman Robert E
J Speech Lang Hear Res. 2015 Jun;58(3):713-21. doi: 10.1044/2015_JSLHR-S-14-0159.
Ambulatory biofeedback has potential to improve carryover of newly established vocal motor behaviors into daily life outside of the clinic and warrants systematic research that is lacking in the literature. This proof-of-concept study was designed to establish an empirical basis for future work in this area by formally assessing whether ambulatory biofeedback reduces daily vocal intensity (performance) and the extent to which this change remains after biofeedback removal (retention).
Six participants with normal voices wore the KayPENTAX Ambulatory Phonation Monitor for 3 baseline days followed by 4 days with biofeedback provided on odd days.
Compared to baseline days, participants exhibited a statistically significant decrease in mean vocal intensity (4.4 dB) and an increase in compliance (16.8 percentage points) when biofeedback was provided above a participant-specific intensity threshold. After biofeedback removal, mean vocal intensity and compliance reverted back to baseline levels.
These findings suggest that although current ambulatory biofeedback approaches have potential to modify a vocal motor behavior, the modified behavior may not be retained after biofeedback removal. Future work calls for the testing of more innovative ambulatory biofeedback approaches on the basis of motor control and learning theories to improve retention of a desired vocal motor behavior.
动态生物反馈有潜力将新建立的发声运动行为推广到诊所之外的日常生活中，且有必要进行文献中缺乏的系统性研究。本概念验证研究旨在通过正式评估动态生物反馈是否能降低日常发声强度（表现）以及在去除生物反馈后这种变化保持的程度（保留），为该领域未来的工作建立实证基础。
六名嗓音正常的参与者佩戴凯宾泰克动态发声监测仪3天作为基线，之后在奇数日提供生物反馈，持续4天。
与基线日相比，当在高于参与者特定强度阈值提供生物反馈时，参与者的平均发声强度在统计学上显著降低（4.4分贝），依从性增加（16.8个百分点）。去除生物反馈后，平均发声强度和依从性恢复到基线水平。
这些发现表明，尽管当前的动态生物反馈方法有潜力改变发声运动行为，但去除生物反馈后，改变的行为可能无法保留。未来的工作需要基于运动控制和学习理论测试更具创新性的动态生物反馈方法，以提高所需发声运动行为的保留率。
