Although the embodiment of FIG. 9A illustrates the auxiliary actuators 904A, 904B at opposite sides along x-direction for the sake of explanation, in practice, more than two auxiliary actuators may surround the main cutaneous actuator 902. Moreover, auxiliary cutaneous actuators may have the same size as the main cutaneous actuator, or auxiliary cutaneous actuators may be of different sizes.
FIG. 9B is a diagram illustrating cutaneous actuators 918A through 918C to enhance localization of vibrations of multiple cutaneous actuators, according to one embodiment. The embodiment of FIG. 9B is the same as the embodiment of FIG. 9A except that all three actuators are main cutaneous actuators that generate vibrations for sensing by the receiving user. In the example of FIG. 9B, curves 920A, 920B, 920C representing vibrations generated by the cutaneous actuators 918A, 918B, 918C, respectively, have the same shape, representing that they all have the same peak amplitude.
