Abstract: The present invention provides a method and system for transmitting data. The system includes an encoder for converting the data into one or more binary sequences using a binary encoding scheme, selecting one or more sets of frequencies from a frequency matrix based on the one or more binary sequences, and prepending a starter frequency to the one or more sets of frequencies. The system further includes an audio generator for generating one or more audio signals based on the one or more sets of frequencies, a storage module and an output module having one or more an electro acoustic transducers for generating an acoustic output based on the one or more audio signals.

Abstract: The present invention provides a method for cashless transaction at a point of sale. The method includes receiving unique information from a payment infrastructure corresponding to user. The unique information is received upon the user sending a request to the payment infrastructure. In addition, the method includes creating a data packet by a mobile device corresponding to the user. The data packet comprises an amount to be paid, the unique information, identity of the mobile device corresponding to the user a transaction number. The amount is entered by the user, wherein the data packet is encrypted. In addition, the method includes sending the data packet to a mobile device corresponding to a merchant. In addition, the method includes receiving an encrypted data from the merchant. In addition, the method includes sending information to the payment infrastructure, wherein the information comprises the decryption of the encrypted data received from the merchant.

Abstract: The present invention provides a method and system for transmitting data. The system includes an encoder for converting the data into one or more binary sequences using a binary encoding scheme, selecting one or more sets of frequencies from a frequency matrix based on the one or more binary sequences, and prepending a starter frequency to the one or more sets of frequencies. The system further includes an audio generator for generating one or more audio signals based on the one or more sets of frequencies, a storage module and an output module having one or more an electro acoustic transducers for generating an acoustic output based on the one or more audio signals.