AUDIO SIGNAL SOURCE VERIFICATION SYSTEM

An audio signal source verification system is presented that, in certain embodiments, receives a first template for an audio signal and compares it to templates from different sound sources to determine a correlation between them. A question and response format may be used to eliminate false verifications and to increase the probability that an audio signal is from the purported source of the signal. Moreover mobile devices may be operated to provide audio signals generated by users of those phones and the audio signals and templates derived form those signals may be compared to known templates to determine a confidence level or other indication may be used to indicate the mobile device user is who they purport to be. Moreover comparisons can be made using templates of different richness to achieve confidence levels and confidence levels may be represented based on the results of the comparisons.