HIGH-SPEED SIMULTANEOUS ANALYSIS OF VOCAL FOLD VIBRATION AND VOICE SIGNAL FOR THE DIAGNOSIS OF VOICE DISORDERS

研究人员研制了一种用于声带振动分析的高速成像系统。在目前的系统中，一个特别设计的侧视喉部远距内窥镜连接在单反相机上。一个固态图像传感器安装在相机的后盖上。当快门被释放时，在计算机控制下进行图像扫描，图像信号通过高速a /D转换器存储在图像存储器中。数据存储后，图像可以被复制并显示在CRT屏幕上或记录在录像机上。通过对图像传感器进行修改，在系统上附加光纤镜，实现了对语音运行过程中声带振动的记录，并用于瞬态分析。此外，同时记录声信号和EGG信号用于评估声带病理。本系统在病理性喉部分析中的应用已被证明是有希望的。声门关闭不完全和不对称或不规则的振动模式在临床上很容易被识别。与传统的录音系统相比，该系统对声带振动进行记录和分析的程序简单，成本较低。该系统可以非常有效地对声带振动和病理声音进行同步分析。

A high-speed imaging system for the analysis of vocal fold vibration was developed in the investigators' institution. In the present system, a specially designed lateral-viewing laryngeal tele-endoscope is attached to a single-les reflex camera. A solid-state image sensor Is attached to the back-lid of the camera. When the shutter is released, an image scan is made under computer control, and image signals are stored in an image memory through a high-speed A/D converter. After the data strage, the images can be reproduced and displayed on a CRT screen or recorded on a video recorder. Recording of vocal fold vibration during running speech for the analysis of a transient state was also developed by attaching a fiberscope to the system with modification of the image sensor. Further, simultaneous recordings of acoustic signals and EGG signals were made for the assessment of vocal pathology.An application of the present system for the analysis of pathological larynx has proved promising. Incomplete glottal closure and asymmetrical or irregular vibratory patterns were easily identified in clinical cases with abnormal voice. The procedure for the recording and analysis of vocal fold fold vibration with the present system are simple and less expensive compared with conventional sliming system. This system has made it possible to perform simultaneous analysis of vocal fold vibration and pathological voices very effectively.