1. Nakamura, H., Sawaguchi, M., Masaoka, K., Watanabe, K., Yamasaki, Y., Miyasaka, E., Yasuoka, M., Seki, H.: Better Audio Balance Broadcasting service for elderly people.-Back Ground Sound Levels of Television Programs for Easy Listening. In: 2003 Proc. Spring Meet. Acoust. Soc. Jpn.,1-5-5, pp. 455–456 (2003) (in Japanese)
2. Lecture Notes in Computer Science;T. Komori,2010
3. Komori, T., Takagi, T.: Subjective evaluation on the background sound of TV program by elderly people in the home environment. In: Proc. Autumn Meet. Acoust. Soc. Jpn., 3-10-14 (September 2009) (in Japanese)
4. Nakayama, Y., Inoue, T., Watanabe, K., Umeda, T., Miyasaka, E.: Perceptual Measurement System for Mixing Balance in Audio Programs. In: Proc. Autumn Meet. Acoust. Soc., pp. 615–616 (September 1997) (in Japanese)
5. Kurozumi, K., Okamoto, N.: Real-time Loudness Level Meter for Broadcasting Stations and Recent Trends of Standardization. Journal of the Institute of Image Information and Television Engineers 60(7), 1012–1017 (2006) (in Japanese)