FIG. 9H is a diagram illustrating placement of two cutaneous actuators 904A, 904B applied with different frequencies, according to one embodiment. By differing the frequencies applied to the cutaneous actuators, beat patterns of different frequencies can be generated by interference between the vibrations generated by the cutaneous actuators. Such beat patterns may be used to encode information for haptic communication.
FIG. 9I is a diagram illustrating a vibration pattern when the same frequency of vibrations are generated by the two cutaneous actuators 904A, 904B, according to one embodiment. The vertical axis of FIG. 9G represents distance D from a center between the two cutaneous actuators 904A, 904B, and the horizontal axis represents time. When the two actuators produce vibrations of the same frequency, no apparent beat pattern is observed as shown in FIG. 9I.
