DEVELOPMENT OF ACOUSTIC ASSESSMENT SYSTEM OF DYSPHONIA FOR CLINICAL USE

开发了一种语音障碍的声学评估系统，以下简称声学语音评估系统。该系统的硬件设置要么是一台带有特殊设备的个人计算机（PC），该设备是新开发的，用于执行语音输入/输出和快速信号处理，要么是一台带有市售声板的个人计算机。这两种设置都能够实现相同的语音评估功能，只是后者缺乏制作语音范围轮廓的能力。该系统允许用户非常容易地进行评估，因为它充分利用了PC上的Windows。从声音评估系统取得的声音评估数据，可直接利用现时在Windows上出售的各种统计软件包作进一步分析。语音评估有两种不同的模式：常规模式和研究模式。在常规模式下，一旦持续元音输入系统，声学评估就会自动进行。另一方面，在研究模式中，用户可以使用各种各样的声学分析工具逐步分析和评估语音样本。这些工具不仅包括与语音障碍评估相关的声学测量，还包括各种基本的语音分析方法，如声谱图、形成峰和音高测量、FFT/LPC频谱显示。一个语音合成模块也被实现来执行一个相当复杂的评估语音障碍以及正常的声音。该语音评估系统可用于语音诊所和语音实验室。

An acoutic assessment system of dysphonia, which is hereafter called acoustic voice assessment system, has been developed. The hardware setup for the system is either a personal computer (PC) with a special apparatus which has been newly developed to perform voice input/output and fast signal processing, or a PC with a commercially available sound board. The two setups are able to realize the same function for the voice assessment except that the latter lacks the ability of making voice range profile. The system allows the user to make the assessment quite easily, since it takes a full advantage of Windows on a PC.The voice assessment data obtained from the voice assessment system can be directly utilised for further analyzes using various statistical software packages which are now commercially available on the Windows.Voice assessment can be performed in two different modes : a routine mode and a research mode. In the routine mode, the acoustic assessment is automatically made once a sustained vowel is input to the system. In the research mode, on the other hand, the user can analyze and evaluate a voice sample with a large variety of acoustic analysis tools on a step-by-step basis. The tools include not only acoustic measurements relevant to the assessment of dysphonia, but also various fundamental speech analysis methods such as sound spectrogram, formant and pitch measurement, FFT/LPC spectrum display. A speech synthesis module is also implemented to perform a rather sophisticated assessment of dysphonia as well as the normal voice.The voice assessment system can be used at voice clinics and voice laboratories.