Garber S F, Martin R R
J Speech Hear Res. 1977 Jun;20(2):233-40. doi: 10.1044/jshr.2002.233.
The present study was designed to assess the effects of increased vocal level on stuttering in the presence and absence of noise, and to assess the effects of noise on stuttering with and without a concomitant increase in vocal level. Accordingly, eight adult stutterers spoke in quiet with normal vocal level, in quiet with increased vocal level, in noise with normal level, and in noise with increased level. All subjects reduced stuttering in noise compared with quiet conditions. However, there was no difference in stuttering when subjects spoke with normal compared with increased vocal level. In the present study, reductions in stuttering under noise could not be explained by increases in vocal level. It appears, instead, that reductions in stuttering were related to a decrease in auditory feedback. The condition which resulted in the largest decrease in auditory feedback, speaking in noise with a normal level, also resulted in the largest decrease in stuttering.
本研究旨在评估在有噪声和无噪声情况下，提高发声水平对口吃的影响，以及评估在有和没有伴随发声水平提高的情况下，噪声对口吃的影响。因此，八名成年口吃者分别在安静环境中以正常发声水平说话、在安静环境中以提高的发声水平说话、在有噪声环境中以正常水平说话，以及在有噪声环境中以提高的水平说话。与安静环境相比，所有受试者在有噪声环境中的口吃情况都有所减少。然而，当受试者以正常发声水平与提高的发声水平说话时，口吃情况没有差异。在本研究中，噪声环境下口吃的减少不能用发声水平的提高来解释。相反，口吃的减少似乎与听觉反馈的减少有关。导致听觉反馈减少最多的情况，即在有噪声环境中以正常水平说话，也导致了口吃减少最多。
