Patent ID: 6876964
Filing Date: 2005-04-05
Classification: A61B,B60K,B60W,G08B,G10L

Abstract:
1. An apparatus for detecting fatigue and doze by voice, comprising: a controller capable of performing the following operations: calculating Lyapunov exponents by chaos analysis of digital data of voices; judging a fatigue level and/or a dozing state by comparing the calculated Lyapunov exponents of voices uttered at different points of time; and a storing device for storing calculation results obtained by the operation of calculating the Lyapunov exponents, wherein said controller is coupled to said storing device and further capable of performing the operation of comparing the Lyapunov exponents of voices uttered at different points of time based on the calculation results, which were obtained in advance by the operation of calculating the Lyapunov exponents and are stored in said storing device, during the judging operation.