Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Masahiko Tsukamoto and Hiroki Watanabe and Tsutomu Terada,A sound-based lifelog system using ultrasound,Proceedings of the 5th Augmented Human International Conference,,ACM,2014-03-07,,,1-2,https://cir.nii.ac.jp/crid/1871146592824798464,https://doi.org/10.1145/2582051.2582110