FIG. 17C is an illustration of example encoded speech signals 1706 for transmission to the cutaneous actuators 1722, in accordance with an embodiment. The signals shown in FIG. 17C include the actuator signals 1736 having varying amplitude (e.g., 1738 and 1740) and actuator signals 1742 having varying frequency (e.g., 1744 and 1746). The actuator signals 1736 may be generated using amplitude changing methods to transmit information related to the temporal envelope 1728 over the continuous-wave carrier signals 1734. The amplitude (signal strength) of the carrier signals 1734 is varied in proportion to the waveform of the temporal envelope 1728 being transmitted to generate the actuator signals 1736.
The actuator signals 1742 may be generated using frequency altering methods to transmit information related to the temporal envelope 1728 over the continuous-wave carrier signals 1734. As shown in FIG. 17C, The actuator signals 1742 may be generated by encoding information from the temporal envelope 1728 in the carrier signals 1734 by varying the frequency of the carrier signals 1734. The frequency deviation (the difference between the frequency of the carrier signals 1734 and the center frequency of the actuator signals 1742 may be proportional to the temporal envelope 1728.
