Who, Why and How Often? Key Elements for the Design of a Successful Speech Application Taking Account of the Target Groups.- Experiences of Designing a Speech User Interface for a Smart Home Environment.- Automatic User Classification for Speech Dialog Systems.- A new Testbed for Semi-Automatic Usability Evaluation and Optimization of Spoken Dialogue Systems.- Stylus Meets Voice - a Practitioner's View on Multimodal Input and Output.- More Than Words: Designing Multimodal Systems.- Sound Branding and Corporate Voice - Strategic Brand Management Using Sound.- Speak to the Target Audience - Some Observations and Notes on the Pragmatics of Spoken Dialog Systems.

Before designing a speech application system, three key questions have to be answered: who will use it, why and how often? This book focuses on these high-level questions and gives a criteria of when and how to design speech systems. After an introduction, the state-of-the-art in modern voice user interfaces is displayed. The book goes on to evolve criteria for designing and evaluating successful voice user interfaces. Trends in this fast growing area are also presented.