Patent ID: 8854985

Claim:
A system for wireless communication using ultrasonic signals, said system comprising: at least one transmission module configured to receive input signals from at least one predefined wireless device and modify said received input signals to produce a modification of said received input signals, wherein said modification of said received input signals comprises signal modulation, and signal securing by signal encoding and signal error correction to produce secured signals, wherein said signal modulation comprises converting the secured signals into corresponding ultrasonic signals, and wirelessly transmit said ultrasonic signals over an ultrasonic communications link; at least one receiving module configured to receive the transmitted ultrasonic signals and recover their corresponding input signals from said respective ultrasonic signals by decoding, error-correction decoding and demodulation of the received ultrasonic signals, and output each of the recovered input signals through at least one output device; wherein said at least one transmission module is further configured to transmit signals over at least one RF link to said at least one receiving module that is configured to receive said signals over said at least one RF link; wherein said at least one transmission module comprises an ultrasonic transmission unit configured to receive said input signals, and perform modification and conversion thereof into the ultrasonic signals and transmit the ultrasonic signals; an RF transmission unit configured to receive and modify the input signals in a manner that enables conversion of each received input signal into an RF signal and transmission of each said RF signal over said at least one RF link; a module configured to identify a current ultrasonic communication link status, wherein upon identification of a low communication status, said at least one transmission module is configured to operate said RF transmission unit and use RF communication when the ultrasonic communication link is poor; and, wherein said at least one receiving module comprises an ultrasonic receiving unit configured to receive transmitted ultrasonic signals and extract said input signals associated therewith and output said input signals; and an RF receiving unit, configured to receive transmitted RF signals and extract input signals associated therewith and output said input signals.