6. The device according to claim 1 , further comprising: a database that stores the audio signal and tracked emotional states in association with a customer service agent.
6. The device according to claim 1 , further comprising: a database that stores the audio signal and tracked emotional states in association with a customer service agent. 7. The device according to claim 6 , wherein the processor is configured to identify transitions from a first emotional state to a second emotional state in the database.