1. Centre for Speech and Language Therapy and Hearing Science, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, UK
2. Department of Otolaryngology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
3. Department of Mechanical Engineering, Faculty of Engineering, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Yamanashi 400-8511, Japan
4. Centre for Rehabilitative Auditory Research, Guizhou Provincial People’s Hospital, Guiyang 550002, China
5. Department of Mechanical and Intelligent Systems Engineering, Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu 182-8585, Japan
6. King Edward VII Hospital, Berkshire NHS Foundation Trust, Winsor SL4 3DP, UK
7. Cambridgeshire Community Services NHS Trust, Cambridge CB1 3DF, UK