The simulation of sound signal masking with different chaotic oscillations and its circuit application

The chaotic masking process on sound signals using the systems of Lorenz, R¨ossler, Sprott, Chen, and Arneodo chaotic oscillations are simulated with MATLAB/Simulink. The PID control method providing synchronization in the system is defined and the mean square errors between the times to reach synchronization and the input-output sound signals are compared for the system performance. The Sprott chaotic system is found to be the best synchronized system. Therefore, the application circuits are designed with respect to the Sprott chaotic system and its results are investigated in this study. It is seen that the system marked with the Sprott chaotic oscillator has a shorter time with respect to the time reaching synchronization, while the Lorenz chaotic oscillator gives a smaller mean square error.

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