Correlation Between Muscle Tone Signal Characteristics And Skeletal Muscle Circumference

Muscle tissue is a significant organ of the human body to move and keep posture,muscle sound signal is a kind of spontaneous acoustic signal during the process of muscle movement,which could directly reflect all kinds of the conditions of muscle tissues.In this paper,based on the virtual instrument technology,we used accelerate vibration sensor,developed a set of muscle sound signal acquisition system,which could collect different parts of the sound signal of calf muscle which is keeping in motion.Through the analysis of approximate entropy,wavelet packet weighted power,fractal characteristics index and average envelope amplitude of muscle sound signal,as well as introducing scatter distribution of characteristics in two-dimension plane,scatter distribution of characteristics in three-dimension space,we studied the relativity between these characteristics and the muscle circumference.The research results show that in different parts and different dimensions of the muscle,the approximate entropy,the wavelet packet weighted power and the average envelope amplitude of the corresponding sound signal has a corresponding change.When the muscle circumference increased,all the characteristics mentioned above are reduced,and the muscle circumference decreases,and the values of the characteristics above are increased.When the muscle circumference decreases,the scatter distribution area had a trend to move over and left.When the method of analysis raised from two-dimensional plane to the three-dimensional space,we can observe the changing trend of the signal characteristics in more diversified perspective.These research results,could provide important technical ideas for muscle condition assessment and health assessment.