Patent ID: 8589167

Claim:
A method comprising: providing, to a putative live speaker within a putative live recording environment, a first signal representative of an unpredictable audio stimulus; receiving a second signal purportedly emanating from at least one of said putative live speaker and said putative live recording environment, the second signal including an audio response associated with the unpredictable audio stimulus; examining said second signal for determining whether characteristics of the audio response associated with the unpredictable audio stimulus are consistent with response characteristics observed in a live recording based on features associated with the first signal and the second signal, said examining comprising at least one of audio feedback analysis, Lombard analysis, and evoked otoacoustic response analysis; and based on said examining, making a determination as to at least one of: whether said putative live speaker is an actual live speaker; and whether said putative live recording environment is an actual live recording environment.