Apparatus for detecting fatigue and doze by voice, and recording medium
First Claim
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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.
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Abstract
An apparatus for judging a fatigue level and/or a dozing state of a person by capturing voices uttered at different points of time from a microphone 5M. A computer performs chaos analysis of the digital data of the inputted voices and calculates Lyapunov exponents and judges a fatigue level and/or a dozing state based on the result of the chaos analysis.
21 Citations
6 Claims
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1. An apparatus for detecting fatigue and doze by voice, comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A computer readable recording medium on which a program for causing a computer to detect a fatigue level and/or a dozing state by analysis of voices uttered at different points of time is recorded, including:
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program code means for causing a computer to remove a voiceless part from digital data of voices;
program code means for causing a computer to generate digital data of a predetermined length from data based on loaded digital data, in the case where a data length after removing a voiceless part from said loaded digital data is less than the predetermined length;
program code means for causing a computer to give the loaded data to a chaos analyzing process for calculating Lyapunov exponents by chaos analysis;
program code means for causing a computer to store calculation results of the Lyapunov exponents calculated by said chaos analyzing process;
program code means for causing a computer to read the stored Lyapunov exponents; and
program code means for causing the computer to judge a fatigue level and/or a dozing state by comparing the read Lyapunov exponents of voices uttered at different points of time.
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Specification