Measurement of subjective communication quality for optical mobile communication systems by using mean opinion score. - Yoshihiro Itoh; Kimihiro Tajima; Nobuo Kuwabara (PIMRC, 2000)

A Two-Dimensional Clustering Approach to the Analysis of Audible Noises Induced at Telephone Terminals. - Masao Masugi; Kimihiro Tajima; Hiroshi Yamane; Kazuo Murakawa (IEICE Trans. Commun., 2006)