THEORETICAL-STUDY OF THE EFFECTS OF VARIOUS LARYNGEAL CONFIGURATIONS ON THE ACOUSTICS OF PHONATION
THEORETICAL-STUDY OF THE EFFECTS OF VARIOUS LARYNGEAL CONFIGURATIONS ON THE ACOUSTICS OF PHONATION
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DOI：
10.1121/1.382973
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发表时间：
1979-01-01
影响因子：
2.4
通讯作者：
TALKIN, DT
中科院分区：
文献类型：
--
作者：
TITZE, IR;TALKIN, DT
[人类]声门体积流量和声带组织运动的模拟是通过时间依赖性边界值问题的数值解[模型]完成的;其中，不均匀、正交各向异性、线性、不可压缩的声带组织介质被不规则形状的边界包围，这些边界是固定的或受到空气动力学应力。组织的空间不均匀性是分层型的，包括粘膜层，韧带层和肌肉层。要求垂直各向异性以纵向稳定声带并适应肌肉应力的大变化。声门的不可压缩性和垂直运动对发声的产生和维持起着重要作用。选择了男性基本发音音高的标称配置。基频，强度，平均体积流量和发声效率的调节进行了研究，在这个标称配置的变化。几何因素，如长度，厚度和深度，因素成形声门，组织弹性，组织粘度和声门下压力是不同的。由于不包括非线性应力-应变特性，声门下压力在这些稍微理想化的条件下对基频[F0]没有产生明显的影响。F0升高与韧带张力增加密切相关，并与声带张力增加有关。当张力保持不变时，F0降低与声带长度增加相关，但与声带厚度增加无关。当结构参数每次改变1个时，人声强度和效率具有局部最大值。口腔声功率输出和发声效率显然可以最大限度地通过适当调整的纵向张力的非肌肉（粘膜和韧带）组织层的肌肉层。定量验证的身体覆盖理论的建议，和几个进一步的影响方面的控制，人类喉被认为是。
Simulation of [human] glottal volume flow and vocal fold tissue movement was accomplished by numerical solution [model] of a time-dependent boundary value problem; in which nonuniform, orthotropic, linear, incompressible vocal fold tissue media were surrounded by irregularly shaped boundaries, which were fixed or subject to aerodynamic stresses. Spatial nonuniformity of the tissues was of the layered type, including a mucosal layer, a ligamental layer and muscular layers. Orthotropy was required to stabilize the vocal folds longitudinally and to accommodate large variations in muscular stress. Incompressibility and vertical motions at the glottis played an important role in producing and sustaining phonation. A nominal configuration for male fundamental speaking pitches was selected. The regulation of fundamental frequency, intensity, average volume flow and vocal efficiency was investigated in terms of variations around this nominal configuration. Geometrical factors such as length, thickness and depth, factors for shaping the glottis, and tissue elasticities, tissue viscosities and subglottal pressure were varied. Since nonlinear stress-strain properties were not included, subglottal pressure did not produce a pronounced effect upon fundamental frequency [F0] under these somewhat idealized conditions. F0 raising correlated strongly with increased tension in the ligament and somewhat with increasing tension in the vocalis. F0 lowering correlated with increase in vocal fold length when the tensions were held constant, but not with increase in vocal fold thickness. Vocal intensity and efficiency have local maxima as the configurational parameters are varied 1 at a time. Oral acoustic power output and vocal efficiency apparently can be maximized by proper adjustments of longitudinal tension of nonmuscular (mucosal and ligamental) tissue layers in relation to muscular layers. Quantitative verification of the body-cover theory is suggested, and several further implications with regard to control of the human larynx are considered.