Abstract: A system and method effective to provide content to a user. The system may include a sound device, a smart phone, and a processor. The sound device may produce a modulated code where different frequencies represent respectively logic 0s and 1s. The smart phone may apply a transform and peak detector to the modulated code to determine logic 0s and 1s to demodulate the code. The smart phone may send the demodulated code to a processor. The processor may receive the code, determine content associated with the code, and send the content over the network to the smart phone. The smart phone may further receive the content and output the content on a display.

Abstract: A system and method effective to provide content to a user. The system may include a sound device, a smart phone, and a processor. The sound device may produce a modulated code where different frequencies represent respectively logic 0s and 1s. The smart phone may apply a transform and peak detector to the modulated code to determine logic 0s and is to demodulate the code. The smart phone may send the demodulated code to a processor. The processor may receive the code, determine content associated with the code, and send the content over the network to the smart phone. The smart phone may further receive the content and output the content on a display.

Abstract: A system and method effective to provide content to a user. The system may include a sound device, a smart phone, and a processor. The sound device may modulate a code where a first set of frequencies represents a logic 0 and a second set of frequencies represents a logic 1. The smart phone may demodulate the modulated code to reproduce the code. The smart phone may send the code as a query to a processor. The processor may receive the query, determine content associated with the code, and send the content over the network to the smart phone. The smart phone may further receive the content and display the content on a display.

Abstract: A system and method effective to provide content to a user. The system may include a sound device, a smart phone, and a processor. The sound device may modulate a code where a first set of frequencies represents a logic 0 and a second set of frequencies represents a logic 1. The smart phone may demodulate the modulated code to reproduce the code. The smart phone may send the code as a query to a processor. The processor may receive the query, determine content associated with the code, and send the content over the network to the smart phone. The smart phone may further receive the content and display the content on a display.

Abstract: A system and method effective to provide content to a user. The system may include a sound device, a smart phone, and a processor. The sound device may produce a modulated code where different frequencies represent respectively logic 0s and 1s. The smart phone may apply a transform and peak detector to the modulated code to determine logic 0s and 1s to demodulate the code. The smart phone may send the demodulated code to a processor. The processor may receive the code, determine content associated with the code, and send the content over the network to the smart phone. The smart phone may further receive the content and output the content on a display.

Abstract: A system and method effective to provide content to a user. The system may include a sound device, a smart phone, and a processor. The sound device may output a modulated code. The sound device may include a processor effective to generate a periodic wave based on a code and a speaker in electrical communication with the processor. The speaker may output the modulated code based on the code. The smart phone may receive and demodulate the modulated code to reproduce the code. The smart phone may send the code to a processor. The processor may receive the code, determine content associated with the code, and send the content over the network to the smart phone. The smart phone may further receive the content and display the content on a display.

Abstract: A system and method effective to provide content to a user. The system may include a sound device, a smart phone, and a processor. The sound device may produce a modulated code where different frequencies represent respectively logic 0s and 1s. The smart phone may apply a transform and peak detector to the modulated code to determine logic 0s and 1s to demodulate the code. The smart phone may send the demodulated code to a processor. The processor may receive the code, determine content associated with the code, and send the content over the network to the smart phone. The smart phone may further receive the content and output the content on a display.