6. A computer-implemented method of evaluating audio quality of a real-time communication system using a first communication and a second communication device communicating via a real-time communication system, the first and second communication devices implementing a method, comprising: receiving, at the first and second communication devices, a turn-based reference script containing linguistic contents of turn-based speech including respective speaking turns for the first and second communication devices; generating, at the first and second communication devices during each of their respective speaking turns, audible speech; receiving audio signals, at the second and first communication devices during each of their respective listening turns, the audio signals including the produced speech from respectively corresponding speaking turns of the first and second communication devices; generating, at the first and second communication devices during each of their respective listening turns, evaluation transcripts by applying speech recognition to the produced speech in the received audio signal; comparing, at the first and second communication devices, the turn-based reference script with the respective evaluation transcript for each of the respectively corresponding listening turns; and generating an overall call quality metric of the real-time communication system based on the comparisons.
6. A computer-implemented method of evaluating audio quality of a real-time communication system using a first communication and a second communication device communicating via a real-time communication system, the first and second communication devices implementing a method, comprising: receiving, at the first and second communication devices, a turn-based reference script containing linguistic contents of turn-based speech including respective speaking turns for the first and second communication devices; generating, at the first and second communication devices during each of their respective speaking turns, audible speech; receiving audio signals, at the second and first communication devices during each of their respective listening turns, the audio signals including the produced speech from respectively corresponding speaking turns of the first and second communication devices; generating, at the first and second communication devices during each of their respective listening turns, evaluation transcripts by applying speech recognition to the produced speech in the received audio signal; comparing, at the first and second communication devices, the turn-based reference script with the respective evaluation transcript for each of the respectively corresponding listening turns; and generating an overall call quality metric of the real-time communication system based on the comparisons. 10. The computer-implemented method according to claim 6 , wherein the audio signal containing speech is generated by playing back a speech recording of each speaking turn and the evaluation transcript is generated using speech recognition.