Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yanagisawa Koichi and Tanaka Kyoko and Yamaura Itsuo,Noise Reduction of a Digital Hearing Aid for Continuous Speech Based on Spectral Harmonic Structure,"IEEJ Transactions on Electronics, Information and Systems",03854221,The Institute of Electrical Engineers of Japan,2000,120,3,382-389,https://cir.nii.ac.jp/crid/1390282679586657664,https://doi.org/10.1541/ieejeiss1987.120.3_382