Dr. M. Nakayama is received the Ph.D. in information Science from Hiroshima City University in 2010. From 2008 to 2009, he was an Assistant Professor of Dept. of Electrical & Computer Engineering, Takamatsu National College of Technology. In 2008, he was also an Invited Research Scientist, Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology. Currently, he is an Assistant Professor of Dept. of Electrical & Computer Engineering, Kagawa National College of Technology. His research interests are in body-conducted speech, speech recognition, speech signal processing, acoustic education and embedded technology.