1. Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea
2. Research Institute of Hearing Enhancement, Yonsei University Wonju College of Medicine, Wonju, Korea
3. Laboratory of Hearing Technology, Department of Speech Pathology and Audiology, Graduate School, Hallym University, Chuncheon, Korea
4. Division of Speech Pathology and Audiology, College of Natural Sciences, Hallym University, Chuncheon, Korea
5. Department of Biomedical Engineering, Yonsei University College of Health Science, Wonju, Korea