This book constitutes the refereed proceedings of the 4th International Workshop on Haptic and
Audio Interaction Design HAID 2009 held in Dresden Germany in September 2009. The 17 revised
full papers presented were carefully reviewed and selected for inclusion in the book. The
papers are organized in topical sections on haptic communication and perception navigation and
guidance visual impairment vibrotactile feedback and music multimodal user interfaces:
design and evaluation and multimodal gaming.
