1. A method for detecting emotion in a voice by utilizing statistics comprising the steps of: (a) providing a database having statistics including statistics of human associations of voice parameters with emotions; (b) receiving a voice signal; (c) extracting at least one feature of the voice signal; (d) comparing the extracted voice feature to the voice parameters in the database; (e) selecting an emotion from the database based on the comparison of the extracted voice feature to the voice parameters; and outputting the selected emotion.