1. A method of regulating speech output by a text-to-speech (TTS) system having an electronic processor and a database, comprising the steps of: (a) evaluating speech that has been converted from text using an initial speech quality test before presentation to a user; (b) applying a classification test to the evaluated speech when the evaluated speech falls below a threshold based on the initial speech quality test; (c) generating an abnormal speech classification for the evaluated speech; and (d) applying a corrective action to the evaluated speech based on the abnormal speech classification in step (c), wherein one or more of steps (a), (b), (c), and (d) are performed using the electronic processor, and at least some data relating to the initial speech quality test, the classification test, or the corrective action is stored in the database.