1. A personalized system for providing a service for improving understandability of received speech in accordance with user specific needs characterized in that it includes: input interface means for capturing received speech signals connected to a speech recognition or speech signal analysis means for identifying the contents of the received speech connected to one input of a data processing means for performing improvement in understandability, a user profile storage means connected to another input of said data processing means for providing user specific improvement data, and an output generation means connected to the output of said data processing means to produce personalized output based on an individual's needs.