Nonlinear Analysis in TCM Acoustic Diagnosis Using Delay Vector Variance

TCM acoustic diagnosis is an important part of the diagnostics of traditional Chinese medicine. Voice can be used to reflect the functions of the viscera and the variations of the pathological conditions. In this paper vowel /a/ signals of healthy persons and patients with deficiency syndrome are analyzed and studied with Delay Vector Variance method. The results indicated that there exists distinct difference between two groups of vowel /a/ signals; the obtained statistic is helpful in recognizing the person with deficiency syndrome.