11. The voice interaction analytics system of claim 10 , wherein the interactions comprise an output of a voice recognition system.
10. An automatic interaction analytics system configured to automatically perform voice interaction analytics by identifying concepts in a plurality of interactions between customers and agents of a contact center, the interaction analytics system comprising: a processor; and a memory, wherein the memory has stored thereon instructions that, when executed by the processor, causes the processor to perform voice analytics by identifying concepts in the plurality of voice interactions between the customers and the agents of the contact center in a plurality of intervals by: identifying a plurality of voice interactions occurring in one of the plurality of intervals; creating a plurality of sentences from the identified interactions; computing a saliency of each the sentences; pruning away sentences with low saliency for generating a set of informative sentences; comparing the sentences of the set of informative sentences to identify a plurality of groups of similar sentences; generating a plurality of sentence clusters, each of the sentence clusters corresponding to a concept of the concepts and comprising a group of similar sentences based on the voice interaction analytics of the plurality of interactions between customers and agents of the contact center; computing a saliency of each of the sentence clusters; naming each of the sentence clusters; identifying a plurality of sentences of an interaction of the interactions; comparing each of the sentences of the interaction with the plurality of sentence clusters to identify a plurality of matching sentence clusters; labeling the interaction with a plurality of matching concepts, each matching concept corresponding to one of the matching sentence clusters based on the voice interaction analytics of the plurality of interactions between customers and agents of the contact center in a plurality of intervals; and displaying, on a display device, the number of interactions labeled with each of the matching concepts during the one of the plurality of intervals based on the voice interaction analytics of the plurality of interactions between customers and agents of the contact center.