Minsley G E, Warren D W, Hinton V
University of North Carolina, Dental Research Center, Chapel Hill 27514.
J Acoust Soc Am. 1988 Feb;83(2):820-4. doi: 10.1121/1.396127.
Although structural defects such as cleft palate and severe anterior open bite alter vocal tract resistance, compensatory responses usually result in maintaining consonant pressures at an adequate level. The purpose of the present study was to determine if individuals with an acquired palatal defect spontaneously develop similar compensatory behaviors. The pressure-flow technique was used to measure aerodynamic variables associated with consonant production after surgery and obturation. Although intraoral pressures decreased considerably immediately after surgery, pressures were maintained at a mean level of 3.5-cm H2O. Respiratory volumes increased as much as fourfold without obturation and were normal with obturation. Voice-voiceless differences in air volumes among consonants were maintained even in the presence of the defect. These findings suggest that compensatory responses are directed toward maintaining an appropriate level of intraoral pressure for consonant production.
尽管诸如腭裂和严重前牙开合等结构缺陷会改变声道阻力，但代偿反应通常会使辅音压力维持在适当水平。本研究的目的是确定患有后天性腭裂的个体是否会自发产生类似的代偿行为。采用压力-流量技术测量术后及阻塞后与辅音产生相关的空气动力学变量。虽然术后口腔内压力立即大幅下降，但压力维持在平均3.5厘米水柱的水平。未阻塞时呼吸量增加多达四倍，阻塞时呼吸量正常。即使存在缺陷，辅音之间的有声-无声空气量差异仍得以维持。这些发现表明，代偿反应旨在维持辅音产生所需的适当口腔内压力水平。
