Abstract: There is provided a system for monitoring audio signals. The system comprises an audio player for generating an initial audio signal to be played back, an audio amplifier for receiving the initial audio signal and amplifying the initial audio signal to obtain an amplified audio signal, a speaker for playing back the amplified audio signal, a sensor for measuring the amplified audio signal concurrently to said playing back the amplified audio signal in order to obtain a sensed audio signal and a processing unit. The processing unit is configured for comparing the sensed audio signal and the initial audio signal together to obtain a comparison result and outputting the comparison result.

Abstract: There is provided a system for monitoring audio signals. The system comprises an audio player for generating an initial audio signal to be played back, an audio amplifier for receiving the initial audio signal and amplifying the initial audio signal to obtain an amplified audio signal, a speaker for playing back the amplified audio signal, a sensor for measuring the amplified audio signal concurrently to said playing back the amplified audio signal in order to obtain a sensed audio signal and a processing unit. The processing unit is configured for comparing the sensed audio signal and the initial audio signal together to obtain a comparison result and outputting the comparison result.

Abstract: There is described a computer-implemented method for authorizing a user device, comprising: use of a processor for receiving an extracted identifier transmitted by a secondary device to be authorized over a telecommunication network, the extracted identifier being previously extracted by the secondary device to be authorized from an acoustic signal generated by an authorized main device, the acoustic signal corresponding to a transmitted audio signal received by the authorized main device and having a reference identifier embedded therein; use of the processor for validating the received identifier; and upon successful validation, use of the processor for transmitting an authorization confirmation to the secondary device.

Abstract: There is described a computer-implemented method for authorizing a user device, comprising: use of a processor for receiving an extracted identifier transmitted by a secondary device to be authorized over a telecommunication network, the extracted identifier being previously extracted by the secondary device to be authorized from an acoustic signal generated by an authorized main device, the acoustic signal corresponding to a transmitted audio signal received by the authorized main device and having a reference identifier embedded therein; use of the processor for validating the received identifier; and upon successful validation, use of the processor for transmitting an authorization confirmation to the secondary device.