11. The computing device of claim 9 , wherein the processing element is further configured to analyze the data stream to determine a plurality of tone of voice values for the customer service representative, each tone of voice value derived from one of a plurality of periods of time during the conversation; analyze the data stream to determine a plurality of tone of voice values for the customer, each tone of voice value derived from one of a plurality of periods of time during the conversation; and generate and display on the display a second score that varies according to whether the customer service representative changed his tone of voice in response to a change in tone of voice of the customer to facilitate the objective evaluation of a customer interaction.
11. The computing device of claim 9 , wherein the processing element is further configured to analyze the data stream to determine a plurality of tone of voice values for the customer service representative, each tone of voice value derived from one of a plurality of periods of time during the conversation; analyze the data stream to determine a plurality of tone of voice values for the customer, each tone of voice value derived from one of a plurality of periods of time during the conversation; and generate and display on the display a second score that varies according to whether the customer service representative changed his tone of voice in response to a change in tone of voice of the customer to facilitate the objective evaluation of a customer interaction. 12. The computing device of claim 11 , wherein the processing element is further configured to determine each occurrence when the customer's tone of voice value is above a first threshold and determine whether the tone of voice value for the customer service representative increases above a second threshold within a first time period after each occurrence.