Patent ID: 8862156

Claim:
A system effective to send code over a network, the system comprising: a sound device effective to: modulate the code by assignment of a first set of frequencies for a logic 0 and a second set of frequencies for a logic 1 to produce a modulated code, and output the modulated code; a first processor in communication with the sound device, the first processor effective to: receive the modulated code; apply the modulated code to a transform to produce a signal, the signal relating to a volume magnitude of frequencies in the modulated code; apply the signal to a peak detector to produce a peak history; analyze the peak history to determine a proposed logic 0 and a proposed logic 1 for the modulated code, wherein the determination of the proposed logic 0 and the proposed logic 1 is based on a determination of whether a number of peaks in a frequency range exceeds a threshold number; demodulate the modulated code with the proposed logic 0 and the proposed logic 1 to reproduce the code; generate an enhanced code based on the code; and send the enhanced code over the network to a second processor.