肠下狭窄症对声振动和语音产生的影响 使用流体结构声学相互作用模拟
Dariush Bodaghi1, Qian Xue1, Xudong Zheng1
1Department of Mechanical Engineering, University of Maine, Orono, ME 04473, USA.
概括
喉下狭窄症 (SGS) 只有当其严重程度超过关键值时,才会显著影响语音产生,影响声振动和喉声学. 该研究强调了流动阻力作为SGS严重程度影响的关键机制.
科学领域:
- 流体动力学 流体动力学
- 生物声学是一种生物声学.
- 声乐折叠机制 声乐折叠机制
背景情况:
- 甲下狭窄 (subglottic stenosis,SGS) 是声下方的气道狭窄的情况.
- 了解SGS对语音产生的影响对于临床诊断和治疗至关重要.
- 之前的研究已经探讨了SGS的影响,但详细的数字调查正在进行中.
研究的目的:
- 通过数值研究下狭窄症 (SGS) 严重程度和位置对喉流动,声振动和语音声学的影响.
- 确定SGS严重性的值,这些值会显著改变语音制作动态.
- 阐明SGS影响语音的潜在机制,特别是流电阻的作用.
主要方法:
- 使用了一个3D流体结构-声学相互作用数值解析器.
- 模拟语音制作与不同的SGS严重性 (面积减少的百分比) 和位置.
- 分析的参数包括喉流量,声振动振幅和频率,声学测量 (例如SNR) 和空气动力学参数 (例如流电阻).
主要成果:
- SGS影响语音产生超过特定的严重程度值:流速和声学75%,声振动90%.
- 在这些值以上,增加的SGS严重性导致流速,振动幅度和声效率下降.
- SGS位置没有显著的影响;主要机制是增加了气道流动阻力,与喉与SGS面积比率有关.
结论:
- 超出关键值的肠下狭窄的严重程度,显著降低了语音生产的质量和效率.
- 主要机制是狭窄引起的流动阻力增加,这取决于相对面积的减少.
- 数字模拟为控制受SGS等气道病理影响的语音产生的复杂相互作用提供了宝贵的见解.
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