A method is provided for embedding data into an audio signal and determining data embedded into an audio signal. The housing component is coupled with the annular collar and selectively rotatable relative to the annular collar. The first electrode layer, the insulating layer and the second electrode layer are laminated on the base substrate in this order. At least one symbol of the plurality of symbols is shifted based on the determination. A thin dielectric layer is then formed on one of the pair of gate oxides which is to remain as a thin gate oxide region for a transistor for use in a logic device.