A haptic feedback device includes a screen and a piezoelectric vibrator partially connected with the screen. The device includes, but is not limited to, an antenna configured to receive a multipath signal and a processor operably coupled to the antenna to receive the multipath signal. The system also enables the user to locate the apparatus anywhere on his body he may find suitable with regard to physiology and with regard to clothing. The method includes generating a second steering matrix having weights set forth in less than n rows or less than c columns. , by antagonizing a normal ptc pathway or agonizing smoothened or hedgehog activity.