1. A method of detecting an emotional state of a telephone caller, the method comprising: providing a speech signal from a telephone caller; dividing the speech signal into at least one of segments, frames, and subframes; extracting at least one acoustic feature from the speech signal; calculating statistics from the at least one acoustic feature; classifying the speech with at least one neural network classifier as belonging to at least one emotional state; and storing in memory and outputting in a human-recognizable format an indication of the at least one emotional state, wherein the speech is classified by a classifier taught to recognize at least one emotional state from a finite number of emotional states; and wherein the speech is classified as emotional or non-emotional.