1. Department of Health Science and Technology, Center for Sensory Motor Interaction, Aalborg University, Aalborg, Denmark;
2. Department of Otolaryngology, Head and Neck Surgery, Aalborg University Hospital, Denmark and Department of Clinical Medicine, Aalborg University, Denmark;
3. Certec, Deptartment of Design Sciences, Lund University, Lund, Sweden;
4. Department of Electronic Systems, Aalborg University, Aalborg, Denmark