Our group studies speech and audio based applications and mobile and ubiquitous systems. As a part of Tampere Unit for Computer Human Interaction and School of Information Sciences the Speech-based and Pervasive Interaction group has a strong computer-human interaction point of view in its research. The user interface issues are studied by implementing interesting applications and studying how they are used. Our work has focused on interaction models, techniques and architectures. The work is carried out in several research projects.